Qualcomm Modem GSP 1620 User Guide

This manual is based on the

GSP-1620 Satellite Data Modem.

Software or hardware changes may

have occurred after this printing.

QUALCOMM reserves the right to make changes in

hardware, software, and technical and product specifications

without prior notice.

QUALCOMM Incorporated

5775 Morehouse Drive

San Diego, CA. 92121-1714

U.S.A.

This technology is controlled by the United States Government. Diversion contrary to U.S.

law prohibited.

QUALCOMM® is a registered trademark of QUALCOMM Incorporated.

Globalstar is a trademark of Loral QUALCOMM Satellite Services, Inc.

QUALCOMM Globalstar GSP-1620 Satellite Data Modem Integrator’s Reference Manual

80-99208-1, Rev. D

April 17, 2001

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Service-Programming Modems ...........................................................3-1

UTPST Overview........................................................................................ 3-2

Using the UTPST ....................................................................................... 3-2

Re-programming Default Parameters....................................................... 3-4

Bulk-Programming Modems...................................................................... 3-7

Upgrading Modem Software...................................................................... 3-7

Making Simple Data Calls ....................................................................4-1

Checking Modem Status ............................................................................ 4-1

Making Simple Packet Data Calls ............................................................ 4-3

Making a Call from the Data Port ...........................................4-4

Entering Online-Command Mode ............................................4-5

Developing Modem Applications ........................................................5-1

Recommended Development Tools............................................................ 5-2

SCADA Application Components .............................................................. 5-2

Packet/Asynchronous Data Overview ....................................................... 5-4

Modem Application Scenarios ................................................................... 5-5

Working with Modem Features................................................................. 5-7

Using Data and Control Ports .................................................5-7

Data and Control Port Configurations ..............................5-8

Port Arbitration Behavior ..................................................5-9

AT Command Processing Modes ......................................5-12

Port(s) Affected by AT Commands ...................................5-13

Port Activation (DTR) Changes during Operation .........5-15

Port Use During Power On and Power Off ......................5-16

Globalstar Satellite Service ...................................................5-16

Short Messaging Service (SMS) .............................................5-17

SMS Alerts ........................................................................5-17

SMS Message Field Information ......................................5-18

SMS AT Commands ..........................................................5-18

Using SMS for Mobile-Terminated Calls ........................5-18

Globalstar Service Alerts .......................................................5-19

Service Status Message ..........................................................5-20

Position Location Determination ...........................................5-21

Using Packet Data ................................................................................... 5-21

Data Rate and Throughput ....................................................5-22

Networking Software and PPP Sessions ...............................5-22

Interoperability with Different Operating Systems .......5-22

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Table of Contents

IP Addressing for the GSP-1620 Modem ...............................5-23

Dynamic IP Addressing ....................................................5-23

Fixed IP Addressing .........................................................5-24

Finding IP Addresses ........................................................5-24

Virtual Private Network Service .....................................5-24

Dormant Mode Service ...........................................................5-25

Mobile-Originated Packet Data Calls ....................................5-27

Mobile-Terminated Packet Data Calls ..................................5-27

Answering Calls Using the Data Port Only ....................5-28

Answering Calls Using the Data and Control Ports .......5-29

Roaming and Packet Data Service ........................................5-29

Using Asynchronous Data ....................................................................... 5-30

Data Rate and Throughput ....................................................5-32

Mobile-Originated Asynchronous Data Calls ........................5-32

Mobile-Terminated Asynchronous Data Calls ......................5-33

Accessing Packet Data Over an Asynchronous

Connection ...............................................................................5-34

Roaming and Asynchronous Data Service ............................5-35

Typical Modem Initialization Strings ..................................................... 5-36

AT Command Reference ........................................................................6-1

AT Command Quick Reference Tables...................................................... 6-2

AT Commands Overview ........................................................................... 6-7

Command Alphabet ..................................................................6-7

Case Sensitivity ........................................................................6-7

Command Line Format ............................................................6-7

Command Syntax .....................................................................6-8

Basic AT Commands .................................................................................. 6-8

Results Returned ......................................................................6-9

Command Echo (E) ...................................................................6-9

Get Info (I) .................................................................................6-9

Monitor Speaker Loudness (L) ...............................................6-10

Monitor Speaker Mode (M) ....................................................6-11

Select Pulse Dialing (P) ..........................................................6-11

Result Code Suppression (Q) ..................................................6-12

Select Tone Dialing (T) ...........................................................6-13

DCE Response Format (V) .....................................................6-13

Result Code Selection Command (X) .....................................6-14

Reset to Default Configuration (Z) ........................................6-15

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DCE Received Line Signal Detector Behavior (&C) .............6-16

DTE Data Terminal Ready Behavior (&D) ...........................6-16

Set to Factory-Defined Configuration (&F) ...........................6-17

Basic Action Commands .......................................................................... 6-18

Answer Incoming Call (A) ......................................................6-18

Repeat Last Command (A/) ....................................................6-19

Dial (D) ....................................................................................6-20

Hook Control (H) ....................................................................6-22

Return to Online Data Mode (O) ...........................................6-23

Basic S-Registers...................................................................................... 6-24

Results Returned ....................................................................6-24

Automatic Answer (S0) ...........................................................6-25

Command Line Termination Character (S3) ........................6-25

Response Formatting Character (S4) ....................................6-26

Command Line Editing Character (S5) .................................6-27

Pause Before Blind Dialing Time (S6) ...................................6-27

Connection Completion Timeout (S7) ....................................6-28

Comma Dial Modifier Time (S8) ............................................6-29

Carrier Detect Threshold Timeout (S9) .................................6-29

Carrier Loss to Disconnect Timeout (S10) ............................6-30

DTMF Tone Duration and Spacing (S11) ..............................6-31

Globalstar-Specific S-Register Extensions.............................................. 6-31

Silent Retry Timeout (S777) ..................................................6-31

Extended Configuration AT Commands ................................................. 6-32

Set Forward MUX Option (+CMUX) .....................................6-32

Set Rm Interface Protocol (+CRM) ........................................6-33

Get Modem User Terminal ESN (+GSN) ..............................6-34

Set Character Framing (+ICF) ..............................................6-35

Set Local Flow Control (+IFC) ...............................................6-36

Set Rm Interface Command Baud Rate (+IPR) ....................6-38

Online-Command Mode Commands........................................................ 6-40

Change from Online to Online-Command Mode (+++) .........6-40

Asynchronous Data through Gateway IWF Commands........................ 6-41

Set Remote Config String (+CFG) .........................................6-41

Data Compression Control Command (+DS) ........................6-42

Error Control Selection Command (+ES) ..............................6-45

Modulation Selection Command (+MS) .................................6-47

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Table of Contents

Dormant Mode Commands ...................................................................... 6-48

Set Dormant Mode Timeout Value (+CTA) ...........................6-49

Packet No Dial ($QCPKND) ..................................................6-50

SMS Commands ....................................................................................... 6-51

SMS Move/Delete ($QCSMSM) ..............................................6-51

SMS Print ($QCSMSP) ..........................................................6-52

SMS Lock ($QCSMSL) ...........................................................6-56

SMS Alert ($QCSMSA) ..........................................................6-57

SMS Info ($QCSMSI) .............................................................6-58

Error Log Services Commands ................................................................ 6-59

Retrieve Error Log ($QCERR) ...............................................6-59

Clear Error Log ($QCCLR) ....................................................6-60

Service Status Commands ....................................................................... 6-61

Service Alert ($QCSA) ............................................................6-61

Service Status ($QCSTATUS) ................................................6-62

Special Calls and Services Commands.................................................... 6-64

Time of Day ($QCTOD) ..........................................................6-64

Position Location Service ($QCPLS) .....................................6-66

Markov Statistics ($QCMSTATS) ..........................................6-68

Set Mode ($QCMODE) ...........................................................6-69

Protocol Stack Modification Commands ................................................. 6-70

TCP Stack Changes ($QCTCP) ..............................................6-70

Use Van Jacobsen Header Compression ($QCVJ) ................6-73

Integrating GSP-1620 Modems

into OEM Products .................................................................................7-1

Integrating Modems into Products............................................................ 7-2

Modem Mechanical Description ...............................................7-3

Modem Board Layout .........................................................7-3

Modem Dimensions and Weight ........................................7-6

Modem Antenna Connectors ....................................................7-6

Data and Control Ports ............................................................7-6

DTR/DSR Signal and Power On/Off ..................................7-7

Changing Data and Control Port Configuration ...............7-8

Control Port Signals ...........................................................7-8

Data Port Signals ................................................................7-9

DB-25 Data and Control Port Pinouts ...............................7-9

Diagnostic Port .......................................................................7-12

Diagnostic Port Pinouts ....................................................7-13

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DC Power ................................................................................7-15

Surge Protection ...............................................................7-16

EMI Filtering ....................................................................7-16

Power Consumption ..........................................................7-16

Power-On ...........................................................................7-17

Power-Off ..........................................................................7-18

Hard Power Reset .............................................................7-18

Grounding ...............................................................................7-18

Modem Mounting Guidelines .................................................7-19

QUALCOMM Mark on OEM Enclosures ........................7-20

Integrated Product Regulatory Labeling .........................7-21

Mounting Antennas On-Site.................................................................... 7-22

Modem Antenna Specifications ..............................................7-22

Antenna Dimensions and Weight ....................................7-23

Antenna Depiction ............................................................7-23

Antenna Cable Specifications ................................................7-25

Calculating Antenna Cable Length .......................................7-27

Mounting Antennas at the Field Site ....................................7-27

Finding a Good Antenna Location ...................................7-27

Securing Antenna Cables .................................................7-28

Mounting and Sealing Antennas on Flat Surfaces .........7-28

Mounting and Sealing Antennas on Poles ......................7-29

Mounting Multiple Antennas ...........................................7-29

Environmental Specifications.................................................................. 7-30

GSP-1620 Modem Environments ...........................................7-30

Temperature/Humidity ..........................................................7-30

Operational .......................................................................7-30

Non-Operational ...............................................................7-30

Thermal Radiation .................................................................7-31

Altitude ...................................................................................7-32

Operational .......................................................................7-32

Non-operational ................................................................7-32

Vibration .................................................................................7-32

Operational - Random ......................................................7-32

Non-Operational - Random ..............................................7-32

Operational - Sinusoidal ...................................................7-32

Non-Operational - Sinusoidal ..........................................7-32

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Table of Contents

Mechanical Shock ...................................................................7-34

Operational .......................................................................7-34

Non-Operational ...............................................................7-34

Acoustic Noise .........................................................................7-34

Digital Data Connector Durability ........................................7-34

Applied Forces ...................................................................7-34

Mating cycles .....................................................................7-34

RF Connector Durability ........................................................7-35

Materials .................................................................................7-35

Shipping ..................................................................................7-35

Dielectric Resonator Antenna (DRA) Environments.............................. 7-35

Temperature/Humidity ..........................................................7-35

Operational .......................................................................7-35

Non-Operational ...............................................................7-36

Thermal Radiation ..................................................................7-36

Icing/Freezing Rain/Snow ......................................................7-37

Altitude ....................................................................................7-37

Operational .......................................................................7-37

Non-Operational ...............................................................7-37

Vibration .................................................................................7-37

Operational - Random ......................................................7-37

Non-Operational - Random ..............................................7-37

Mechanical Shock ...................................................................7-38

Operational .......................................................................7-38

Non-Operational ...............................................................7-38

RF Connector Durability ........................................................7-39

Materials .................................................................................7-39

Shipping ..................................................................................7-39

Troubleshooting ......................................................................................8-1

Globalstar Background ........................................................................A-1

Space Segment........................................................................................... A-2

Ground Segment........................................................................................ A-2

Coverage .................................................................................................... A-2

Carriers...................................................................................................... A-4

Distributors and OEMs for User Terminals ............................................ A-5

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RF Certification/Restrictions .............................................................B-1

Certification............................................................................................... B-1

Federal Communications Commission (FCC) ........................ B-2

European R&TTE Directive 1999/5/EC .................................. B-2

RF Restrictions.......................................................................................... B-3

Radio Astronomy Zones ........................................................... B-3

GPS Interference Elimination ................................................ B-3

Radio Frequency Exposure Restrictions .................................................. B-3

Electronic Device Restrictions.................................................................. B-4

Pacemakers .............................................................................. B-4

Hearing Aids ............................................................................ B-5

Other Medical Devices ............................................................. B-5

Warranty ..................................................................................................C-1

Product Support ....................................................................................D-1

QUALCOMM Globalstar Customer Service............................................ D-1

Technical Support Information ...............................................D-1

Order Fulfillment Information ...............................................D-2

Website Information ................................................................D-3

Contacting QUALCOMM Customer Service ..........................D-3

Contact information ...........................................................D-4

Specification Summary ........................................................................E-1

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LIST OF FIGURES

Figure 1-1.

Figure 1-2.

Typical Modem SCADA Application Using

Packet Data ...................................................................1-4

Typical Modem SCADA Application Using

Asynchronous Data .......................................................1-5

Conceptual Diagram of GSP-1620 Modem ..................1-6

Simplified Top View of GSP-1620 Modem ...................2-3

Modem Interface Cable Bridle .....................................2-4

Modem Diagnostic Cable ..............................................2-8

Antenna Base Showing Connectors ...........................2-10

DCE - DTE Application Components ...........................5-3

DTE-to-DCE Rm Interface ...........................................5-7

Asynchronous Data Call Components .......................5-31

GSP-1620 Modem Board Layout (Top View) ...............7-4

GSP-1620 Modem Board Layout

Figure 1-3.

Figure 2-1.

Figure 2-2.

Figure 2-3.

Figure 2-4.

Figure 5-1.

Figure 5-2.

Figure 5-3.

Figure 7-1.

Figure 7-2.

(Side/ Bottom Views) .....................................................7-5

QUALCOMM Mark for OEM Enclosures ..................7-21

DRA Side View ............................................................7-22

DRA View Showing Connectors .................................7-23

DRA Top and Side Views ............................................7-24

DRA Bottom View and Mounting Hole Locations .....7-25

GSP-1620 Modem Temperature/Humidity

Figure 7-3.

Figure 7-4.

Figure 7-5.

Figure 7-6.

Figure 7-7.

Figure 7-8.

Envelope ......................................................................7-31

GSP-1620 Modem Random Vibration Spectra ...........7-33

Figure 7-9.

Figure 7-10. DRA Temperature/Humidity Envelope .....................7-36

Figure 7-11. DRA Random Vibration Spectrum .............................7-38

Figure A-1. Globalstar Coverage Availability ................................ A-3

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LIST OF TABLES

Table 1-1.

Table 1-2.

Table 2-1.

Table 3-1.

Table 3-2.

Table 5-1.

Table 5-2.

Table 5-3.

Table 5-4.

Table 5-5.

Table 6-1.

Table 6-2.

Table 6-3.

Table 6-4.

Table 6-5.

Table 6-6.

Table 6-7.

Table 7-1.

Table 7-2.

Table 7-3.

Typical GSP-1620 Modem Applications ......................1-3

Checklist of Modem Integrator’s Kit Components ......1-8

DTR Switch Positions ...................................................2-8

Service Programming Parameters You Must Set ......3-5

Bulk Service-Programming Options ............................3-7

Packet vs. Asynchronous Data ...................................5-4

Port Signal Lines ..........................................................5-8

Port Arbitration Behavior .........................................5-10

Port(s) Affected by AT Commands ............................5-14

Sample Typical Modem Initialization Strings .........5-36

Operational AT Commands .........................................6-2

Non-Operational AT Commands .................................6-6

Result Codes for Basic AT Parameter Commands ......6-9

Common Result Codes for S-Register Commands ....6-24

SMS Print Command Field Definitions ....................6-54

SMS Info Command Field Definitions ......................6-59

Modem Status Information .......................................6-63

Interface Connector Pinouts ......................................7-10

Diagnostic Port Pinouts .............................................7-14

Modem DC Power Consumption Estimates

at 12 V DC Input .........................................................7-17

Suggested RF Cable and Connector Suppliers ..........7-26

Swept Sine Vibration Definition ...............................7-33

Troubleshooting Modem Problems ..............................8-1

Specification Summary — GSP-1620 Modem .......... E-1

Specification Summary — Dielectric Resonator

Table 7-4.

Table 7-5.

Table 8-1.

Table E-1.

Table E-2.

Antenna (DRA) ............................................................ E-3

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REVISION HISTORY

Version

Release Date

Notes

Rev. A

Rev. B

Rev. C

August 23, 2000

October 13, 2000

January 25, 2001

First Production Release

Revised hardware specifications

Release to accompany GSP-1620 modem software

version 5.2:

■

Changed modem name and manual title

(removed “packet”)

Added information about asynchronous data,

especially in Chapters 5 and 6

Revised Diagnostic cable graphic and

procedures in Chapter 2

Revised Customer Service information in

Appendix D

Added antenna specifications to Appendix E

Rev. D

April 17, 2001

Updates and corrections:

■

Revised some AT command descriptions or

parameter values in Chapter 6

Added pinout information for Diagnostic port

in Chapter 7

Added references to the Modem Operation

Monitor in Chapters 2 and 6

Applied new document layout design

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ABOUT THIS MANUAL

This QUALCOMM Globalstar GSP-1620 Satellite Data

Modem Integrator’s Reference Manual, also referred to as the

Integrator’s Reference Manual, provides the information

needed to install and use the QUALCOMM Globalstar

GSP-1620 Satellite Data Modem, also referred to as the

GSP-1620 modem in this document.

Who Should Use This Manual

This manual is intended for the following users:

•

People who set up the modem from the Modem

Integrator’s Kit on a bench for development and testing

Application developers who create software applications

that work with the GSP-1620 modem

Developers and OEMs who service-program modems to

make them work with Globalstar Service Providers

OEMs or system integrators who incorporate GSP-1620

modem hardware into commercial products (for example,

oil pipeline monitors)

•

OEM field technicians who install those products on site

Getting Started on page 1-1 includes a roadmap pointing

different users to relevant sections in this manual.

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How This Manual Is Organized

This following table summarizes how information is

organized in this manual.

Chapter

Description

Chapter 1. Getting Started

Introduction to the GSP-1620 modem and

the Modem Integrator’s Kit.

Chapter 2.

Quick Bench Set-Up

Quick instructions for connecting and

powering up the modem and sending

commands via HyperTerminal.

Chapter 3.

Service-Programming Modems

Coordinating with Service Providers and

re-programming default modem

parameters.

Chapter 4.

Making Simple Data Calls

Quick tutorial on setting up a PC for

packet data, making mobile-originated

packet data calls, and using modem ports.

Chapter 5.

Developing Modem Applications

Developing software applications that

work with modem features.

Chapter 6.

AT Command Reference

Developer’s reference for AT commands,

syntax, and values.

Chapter 7.

Integrating GSP-1620 Modems

into OEM Products

Hardware descriptions of the modem and

antenna, mounting guidelines, and

environmental specifications.

Chapter 8. Troubleshooting

Related Documentation

Globalstar UT Program Support Tool User’s Guide,

80-98225-1.

Globalstar User Terminal Service Programming Guide,

80-98482-1.

Globalstar UTPST Script API Reference Manual, 80-99114-1.

QUALCOMM Globalstar Data User Guide, 80-99126-1.

QUALCOMM Globalstar Modem Operation Monitor User’s

Guide, 80-99399-1.

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Cautions and Warnings

Before working with the modem hardware or power connections,

remove rings, watches, and other metallic objects that could cause

electrical shock or burns.

Warning

Use proper electrostatic discharge (ESD) equipment and procedures to

avoid damage to the modem.

Caution

Any changes or modifications to this equipment not expressly approved

in this document could void your warranty and your authority to operate

this equipment.

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GETTING STARTED

Welcome to the Integrator’s Reference Manual for the

QUALCOMM Globalstar GSP-1620 Satellite Data Modem.

The GSP-1620 modem offers data communication solutions,

particularly for Remote Monitoring and Supervisory Control

and Data Acquisition (SCADA) applications in locations such

as power substations, telecommunication concentration

nodes, oil and gas wells, pipes, and offshore facilities.

Whether you are an application developer, system integrator,

or Original Equipment Manufacturer (OEM), this

Integrator’s Reference Manual contains information you need.

If you want to:

Go to:

■

Bench-set up, connect, and power-up the

Chapter 2

GSP-1620 modem in the Modem

Integrator’s Kit, and get HyperTerminal

to talk to the modem

■

Service-program modems to work with

your Service Provider (SP) and within the

Globalstar system

Chapter 3

■

Set up your computer for packet data and

make a simple packet data call

Chapter 4

Chapter 5

Develop market-specific application

software to work with the GSP-1620

modem (using packet data or

asynchronous data)

■

Understand modem AT commands

Chapter 6

Chapter 7

Mount GSP-1620 modems and antennas

for market-specific OEM products

(including all hardware and

environmental specifications)

■

Troubleshoot modem problems

Chapter 8

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GSP-1620 Modem Overview

The QUALCOMM Globalstar GSP-1620 Satellite Data

Modem delivers reliable digital data communications

wherever Globalstar data service is available, using

QUALCOMM’s patented CDMA technology and the

Globalstar Communications System’s constellation of 48

low-Earth-orbit (LEO) satellites.

The GSP-1620 modem handles two kinds of data connections:

•

Packet — over the Internet or other TCP/IP

packet-switched network

•

Asynchronous — routed through the Public Switched

Telephone Network (PSTN) to a destination modem

QUALCOMM Globalstar packet data service has a lower overhead and

faster connection time than asynchronous data does. If a SCADA

application does not specifically need asynchronous data, it should use

packet data instead.

Tip

As an OEM, you directly integrate the GSP-1620 modem into

a market-specific product, to resell to a business/industrial

customer.

For additional information about the Globalstar system, see Globalstar

Background, page A-1. For information about buying bulk modems from

QUALCOMM, contact QUALCOMM Globalstar Customer Service as

described in Appendix D.

Note

1-2

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GettingStarted

Typical Modem SCADA Applications

In remote settings or difficult-to-access sites, acquiring and

responding to process control and alarm data can be

challenging and costly. For both system integrators and

OEMs, the QUALCOMM Globalstar GSP-1620 Satellite Data

Modem provides real-time, low cost, bi-directional data

communication solution applications in remote locations for

fixed or mobile use.

The GSP-1620 modem lets you retrieve data automatically

from remote sites. Unmanned sensors connected to the

GSP-1620 modem can monitor remote operations and initiate

alert notifications.

Table 1-1 lists some typical Remote Monitoring and

Supervisory Control and Data Acquisition (SCADA)

applications.

Table 1-1. Typical GSP-1620 Modem Applications

Electric Utility Industry

Remote Security Systems

Monitoring

Oil and Gas Wells, Tanks,

Pipelines, Offshore Platforms

Energy Management

Water Treatment Plants

Retail Point of Sale (POS)

Transactions

Remote Inventory

Management

Remote Banking

Electronic Billboards

Agriculture

Highway Traffic Monitoring

Aircraft Weather/Messaging

for Commercial and General

Aviation

Figure 1-1 depicts a typical use of the GSP-1620 modem for a

SCADA application using packet data.

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Figure 1-1. Typical Modem SCADA Application Using Packet Data

Satellite

Outdoor Antenna

Globalstar

Gateway

DCE

Remote

DTE

GSP-1620

Modem

SCADA Terminal

Internet

Data Port

Control Port

Host

Server

For packet data connections, the GSP-1620 modem

essentially functions as a “node” on the Internet and, with its

fixed or dynamically assigned IP address, can be addressed in

real time as often as necessary to maintain application

control over the remote devices.

Figure 1-2 depicts a typical use of the GSP-1620 modem for a

SCADA application using asynchronous data.

1-4

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GettingStarted

Figure 1-2. Typical Modem SCADA Application Using

Asynchronous Data

Satellite

Outdoor Antenna

Globalstar

Gateway

DCE

Gateway IWF Modem

Remote

DTE

GSP-1620

Modem

PSTN

SCADA Terminal

Host

Server

Data Port

Control Port

Host Modem

For asynchronous data connections, the GSP-1620 modem

can dial or be dialed by a host modem, connecting through the

Globalstar Satellite Communications System and the PSTN.

You can think of the GSP-1620 modem in Figure 1-1 and

Figure 1-2 as a 9600 bps full duplex satellite modem. The

modem uses typical Hayes AT commands (see Chapter 6, AT

Command Reference). Standard RS-232 interfaces facilitate

ease of use and OEM application integration.

For either packet or asynchronous connections, OEMs

provide the host application (server), which uses the

GSP-1620 modem to communicate with a custom SCADA

application on data terminating equipment (DTE) at a remote

site. The host application manages the field processing of

data and reports process exceptions, performance reports,

alarm conditions—in short, any data needed from the

remote site.

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For example, in the electric utility industry, a SCADA

application using the GSP-1620 modem could remotely turn

on a pump, close a switch, open a gate, request a new meter

reading, monitor line voltage, or report on power outages.

Conceptual Overview

Figure 1-3 depicts a conceptual overview of the QUALCOMM

Globalstar GSP-1620 Satellite Data Modem, including its

ports and antenna.

Figure 1-3. Conceptual Diagram of GSP-1620 Modem

Outdoor

Antenna

UT Program Support Tool

(UTPST)

for service programming

Diagnostic Port

GSP-1620

Modem

Interface Port

Serial Control Port

Serial Data Port

DC Power

5.6V-16V

Data

or AT

commands

Modem AT

commands

SCADA Application Terminal

1-6

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GettingStarted

The GSP-1620 modem is a bare board “sandwich” stack of

Circuit Card Assemblies (CCA) containing two boards:

•

Globalstar RF board — includes the LNA, RF power amp,

upconverters and downconverters, TCXO, synthesizers,

and the remaining power electronics.

•

Globalstar Digital board — includes the processor, the

modem, and some of the power management electronics.

QUALCOMM offers the GSP-1620 modem without a

mechanical enclosure, anticipating that OEMs will integrate

and package the modem with the end-user’s application.

The GSP-1620 modem operates in the “Globalstar (or

satellite) data mode only,” as opposed to the GSP-1600

Tri-Mode Phone, which has additional terrestrial cellular

(analog and digital) and voice capabilities. The GSP-1620

modem is powered by an external power source provided by

the user.

A weatherproof Dielectric Resonator Antenna (DRA),

sometimes referred to as an Outdoor Unit (ODU), comes with

each modem. OEMs provide antenna cables (SMA to MCX

connectors), to meet customer antenna-cable length needs.

A single DB-25 (male) connector is used for the user interface

port. The DB-25 carries DC power, as well as the Data and

Control RS-232 signals, between the SCADA application

(DTE) and the modem (DCE).

A Diagnostic port on the modem allows network provisioning

(service programming) and software upgrades.

What’s in the Modem Integrator’s Kit?

Your GSP-1620 Modem Integrator’s Kit (MIK) is designed to

help you rapidly develop user applications for GSP-1620

modems.

Table 1-2 shows the items contained in your GSP-1620

Modem Integrator’s Kit (QUALCOMM part number: MCN

65-82317-1).

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Table 1-2. Checklist of Modem Integrator’s Kit Components

Kit Component

QUALCOMM Globalstar GSP-1620 Satellite Data Modem

Dielectric Resonating Antenna (DRA)

Pair of antenna cables with connectors (for quick bench

setup of the kit modem)

Custom DB-25 cable bridle, which splits out the DE-9 Data

Port connector, the DE-9 Control Port connector, and the

DC power leads (positive, negative, and reset)

Diagnostic port cable, for service-programming the modem

or to use as alternate power source via its AC adapter

GSP-1620 modem CD-ROM containing the following:

■

Software code samples for modem applications

■

A “soft copy” (PDF file) of this Integrator’s Reference

Manual

■

“CDMA by QUALCOMM” logo in an Encapsulated

PostScript (EPS) file

A “soft copy” (PDF file) of the QUALCOMM Globalstar

Data User Guide, 80-99126-1EN, as a guide for the

setup of a Windows modem driver and Windows

Dial-Up Networking.

Globalstar UT Program Support Tool (UTPST), including:

■

CD-ROM containing the UTPST software and a “soft

copy” (PDF file) of the Globalstar UTPST Script API

Reference Manual, 80-99114-1

■

Globalstar UT Program Support Tool User’s Guide,

80-98225-1

Globalstar User Terminal Service Programming

Guide, 80-98482-1

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GettingStarted

What You May Need in Addition to the Kit

The Modem Integrator’s Kit should be sufficient for setting

up one modem on a bench for development and testing.

For GSP-1620 modem development purposes (bench setup

and developing modem applications), it is recommended that

you have a Windows PC, because the Modem Integrator’s Kit

CD-ROM contains some Windows code samples.

If necessary, you can power the modem via the AC adapter on

the Diagnostic cable, but you may prefer to use your own DC

power supply. Mounting a bench modem and antenna is

optional, but would require M3 and M4 screws, respectively,

and a screwdriver.

OEMs who are packaging modems into end-user products will

need to supply mounting enclosures and customized cables.

For details, see Integrating GSP-1620 Modems into OEM

Products on page 7-1.

Configuration and setup of computer systems to use the

GSP-1620 modem with Point-to-Point Protocol (PPP) is

beyond the scope of this document. However, the

configuration procedures for the QUALCOMM Globalstar

GSP-1600 Tri-Mode Phone are included as a reference in the

QUALCOMM Globalstar Data User Guide, 80-99126-1

(located on the kit’s CD-ROM). For example, using the

procedures in that document, you can set up a Windows

modem driver and Windows Dial-Up Networking. With the

proper DNS addresses from your Service Provider (SP) or

Internet Service Provider (ISP), you can access the Internet

using your GSP-1620 modem via the Globalstar satellite

system.

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QUICK BENCH SET-UP

Your GSP-1620 Modem Integrator’s Kit contains a

QUALCOMM Globalstar GSP-1620 Satellite Data Modem.

This chapter tells how to quickly set up the GSP-1620 modem

on a test bench so that you can interact with it, including the

following topics:

•

Connecting hardware components as appropriate for a

bench setup

•

Providing power to the modem

Setting up HyperTerminal to talk to the modem and

query its status, using modem AT commands

Keep in mind that the quick bench setup shown in this

chapter differs from the setup you might use for developing

applications, integrating modems permanently into OEM

products, or for field installation.

For example, in the quick bench setup, you communicate with

the modem by typing AT commands into HyperTerminal,

whereas a SCADA application will communicate with the

modem using AT commands embedded within its code.

Also, in the quick bench setup, you can use the cables

provided in the kit to connect to the modem ports and

antenna, whereas for a SCADA field installation, OEMs will

make custom cables.

Examples in this chapter assume you are connecting a Windows PC to

the modem.

Note

For your safety and to avoid potential damage to the equipment,

observe the Cautions and Warnings on page xxiv.

Caution

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Connecting Hardware Components

The setup process for the GSP-1620 modem includes:

A quick tour of the modem

Connecting the modem cables

Connecting the Interface cable (Data port, Control

•

❑

port, power) to the modem and to your PC

❑

Connecting the antenna cables (Tx, Rx) to the modem

Connecting the Diagnostic cable (if you want to power

the modem from its AC adapter, service-program the

modem, or monitor some modem functions)

•

Connecting and mounting the antenna

Mounting the modem (optional)

Grounding the system

Providing power to the modem

Setting up HyperTerminal to talk to the modem and

testing your connection

A Windows PC is recommended for modem bench setup and

application development. Modems must be service programmed using

the Globalstar UT Program Support Tool, which is a Windows software

application.

Tip

A Quick Tour of the Modem

For quick bench set-up, first remove the GSP-1620 modem

from the GSP-1620 Modem Integrator’s Kit.

When handling the modem, observe precautions necessary to avoid

damage by electrostatic discharge (ESD).

Caution

Compare the GSP-1620 modem to Figure 2-1. This

illustration shows the connectors and components you will

use in the following sections.

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Quick Bench Set-Up

Figure 2-1. Simplified Top View of GSP-1620 Modem

Mounting hole

Receive (Rx) antenna lead

connects here (J7)

Transmit (Tx) antenna lead

connects here (J3)

Diagnostic Port

(Diagnostic cable

connects here for

UTPST, AC power

adapter, or Modem

Operation Monitor)

Mounting hole

Interface Port:

combines Data Port,

Control Port, and DC Power input

(Modem Interface Cable from kit

connects here, or OEMs

make their own custom cables)

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Connecting the Modem Cables

For the GSP-1620 modem to work, you must connect several

cables:

•

Modem interface cable — connects the Data port to a PC,

connects the Control port to a PC (optional), and connects

power leads to a DC power supply.

Antenna cables — connect the transmit (Tx, J3) and

receive (Rx, J7) leads to the Tx and Rx connectors on the

Dielectric Resonator Antenna.

Diagnostic cable — connects the Diagnostic port to a PC

running the Globalstar UT Program Support Tool

(UTPST) for modem service programming, or the

QUALCOMM Globalstar Modem Operation Monitor; can

also be used as an optional, alternate power supply via its

AC adapter.

Connecting the Modem Interface Cable

Your Modem Integrator’s Kit includes a custom DB-25

modem interface cable bridle, which connects to the Interface

port on the modem. The cable bridle splits out the DE-9 Data

Port and DE-9 Control Port, and the DC power connectors

(DC POWER, SIG GND, and RESET), as shown in Figure 2-2.

Figure 2-2. Modem Interface Cable Bridle

Modem Interface Cable

"P2-DATA PORT"

Modem connector

PC serial connector

To PC

"P3-CONTROL"

PC serial connector

To modem

Power connectors:

"SIG GND" (black)

"DC POWER" (red)

"RESET"

(yellow)

Open

(ground to reset)

To DC power supply

(user-provided)

To PC

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Quick Bench Set-Up

TO CONNECT THE INTERFACE CABLE TO THE MODEM

Steps

■

Connect the DB-25 modem connector on the interface

cable (Figure 2-2) to the interface port on the modem

(Figure 2-1).

Do not connect power yet.

TO CONNECT THE INTERFACE CABLES TO YOUR PC

Steps

1. On the interface cable (Figure 2-2), connect the Data port

connector (labeled “P2-DATA PORT”) to COM 1 or

another available serial COM port on your PC.

The Data port transmits packet (PPP) or asynchronous

data. You can also use it to send AT commands to the

modem. You will see an example of how this works in

Chapter 4.

2. On the interface cable (Figure 2-2), connect the Control

port connector (labeled “P3-CONTROL”) to COM 2 or

another available serial COM port on your PC (or a

different PC, if desired).

You can use the Control port to send AT commands to the

modem, without interrupting data flow on the Data port.

You will see an example of how this works in Chapter 4.

The Control port can also receive SMS messages; for

information, see Short Messaging Service (SMS) on page

5-17.

If you need to extend the interface cables to reach your PC(s), you can

use straight RS-232 9-pin serial cables (with no crossovers). For

maximum RS-232 extension cable lengths, see the TIA/EIA-232-E

specification.

Note

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Connecting Antenna Cables

The Modem Integrator’s Kit contains two antenna cables (3

feet long) with snap-in connectors, for connecting the modem

to the Dielectric Resonator Antenna (DRA). The antenna

must be located outdoors.

Due to loss constraints on antenna length (see Calculating

Antenna Cable Length on page 7-27), if you need to extend the

kit cables to reach your antenna, it is more practical to locate

the modem closer to the antenna and extend the modem’s

serial cables instead. For a tip on how to do this, see

Connecting and Mounting the Antenna on page 2-9.

OEMs must supply custom antenna cables for their modem

applications.

Either antenna cable in the developer’s kit can be used for transmit or

receive; however, you must make sure not to cross them. In other

words, be careful to connect the Tx connector on the antenna to the Tx

connector (J3) on the modem, and the Rx connector on the antenna to

the Rx connector (J7) on the modem. Crossing the Tx and Rx cables

can damage the modem.

Caution

TO CONNECT THE ANTENNA CABLES TO THE MODEM

Steps

1. Select one antenna cable to be the transmit cable (it does

not matter which one).

2. Label both ends of that cable with “Tx.” For example, you

could write “Tx” on a piece of tape wrapped around each

end of the cable.

3. Plug either end of the cable marked “Tx” into the transmit

(Tx) connector (J3) on the modem, as shown in Figure 2-1.

4. Plug either end of the unmarked cable into the receive

(Rx) connector (J7) on the modem, as shown in Figure 2-1.

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Quick Bench Set-Up

Connecting the Diagnostic Cable

The Diagnostic cable lets you:

•

Service-program GSP-1620 modems, using the

Globalstar User Terminal Program Support Tool

(UTPST). For more information about the UTPST, see

UTPST Overview on page 3-2.

•

Monitor or verify some modem functions, using the

QUALCOMM Globalstar Modem Operation Monitor.

For more information, see the QUALCOMM Globalstar

Modem Operation Monitor User’s Guide, 80-99399-1.

The cable includes an optional AC adapter. If a DC power

supply is not available on your bench, you can power the

modem with the AC adapter on the Diagnostic cable.

The Diagnostic cable also includes a switch box that controls

whether the cable’s DTR (Data Terminal Ready) signal is

asserted (“POS 1 DTR to GND”) or de-asserted (“POS 2 DTR

Open” or “POS 3 Not Used”). When DTR is asserted, the

modem powers up immediately if power is provided. Before

powering down the modem with this cable attached, you must

set this switch to “POS 2” or “POS 3.”

On the switch box, “POS 2 DTR Open” and “POS 3 Not Used” are

functionally equivalent. Some cables are equipped with a two-position

switch box and do not have “POS 3.” The switch positions for these

cables are “POS 1 DTR to GND” (DTR asserted) and “POS 2 DTR

Open” (DTR de-asserted).

Note

Tip

When the Diagnostic cable is connected but you are not using the

UTPST to service-program the modem, leave the Diagnostic cable

switch in the “POS 2 DTR Open” (de-asserted) position.

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Figure 2-3. Modem Diagnostic Cable

PC Connector

"P1 - PC"

Modem connector

"P2 - module"

Lock ring

AC Wall

adapter

Power

connector

Locking

threads

POS 2

DTR OPEN

POS 1

POS 3

DTR to GRD

NOT USED

DTR Switch box

005AA_01

Table 2-1. DTR Switch Positions

Position

POS 1

POS 2

POS 3

Switch Label

DTR to GND

DTR Open

Not Used

Effect

DTR is asserted.

DTR is de-asserted.

DTR is de-asserted

(equivalent to POS 2).

Note: Some cables are equipped with a

two-position switch box and do not

have “POS 3.” The switch positions for

these cables are “POS 1 DTR to GND”

(DTR asserted) and “POS 2 DTR

Open” (DTR de-asserted).

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Quick Bench Set-Up

TO CONNECT THE DIAGNOSTIC PORT CABLE

Steps

1. Connect the DE-9 modem connector (“P2-Module”) on the

Diagnostic cable (Figure 2-3) to the 9-pin Diagnostic port

on the modem (Figure 2-1).

2. Connect the DE-9 PC connector (“P1-PC”) on the

Diagnostic cable to a COM port on your computer.

3. Locate the switch on the cable, and set it to “POS 1 DTR

to GND.”

Do not plug in the AC wall adapter yet. For information

about powering the modem, see Providing Power to the

Modem on page 2-12.

Connecting and Mounting the Antenna

The GSP-1620 modem uses a Dielectric Resonator Antenna

(DRA) with a passive transmit and an active receive section.

The transmit (Tx) and receive (Rx) connectors are labeled on

the base of the antenna.

Since the antenna communicates with Globalstar satellites, it

must be positioned outdoors where it has a clear view of the

sky, unimpeded by tall obstacles such as buildings and trees.

Antenna cable length is limited, due to insertion loss and potential

emission problems. For details, see Antenna Cable Specifications on

page 7-25 and Calculating Antenna Cable Length on page 7-27.

Caution

Tip

For a quick setup, you may want to mount the antenna on top of a

water-tight box on your roof. Mount the modem inside the box, then run

extension cables (straight RS-232 9-pin serial cables with no

crossovers) for the power and serial connectors to your indoor bench.

(For maximum RS-232 extension cable lengths, see the TIA/EIA-232-E

specification.) A box setup lets you use the antenna cables from the kit,

without worrying about antenna cable length.

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Figure 2-4. Antenna Base Showing Connectors

O-Ring groove

RX Antenna connector

(labeled on antenna base)

TX Antenna connector

(labeled on antenna base)

TO MOUNT THE ANTENNA

Steps

1. Locate the antenna outdoors where it has a clear view of

the sky. Make sure the antenna is close enough to the

modem that you can use the antenna cables provided in

the Modem Integrator’s Kit.

The antenna must have a clear view of the sky to get a

strong signal.

2. Plug the antenna cable that you labeled “Tx” into the

transmit connector (also labeled Tx) on the antenna

(Figure 2-4). Make sure the other end of the cable is

connected to the J3 connector on the modem.

You must be careful to connect the Tx connector on the antenna to the

Tx connector on the modem, and the Rx connector on the antenna to

the Rx connector on the modem. Crossing the Tx and Rx cables can

damage the modem.

Caution

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Quick Bench Set-Up

3. Plug the other antenna cable into the receive (Rx)

connector on the antenna.

4. Secure the antenna to a flat surface using six M4 screws

through the six mounting holes. To prevent moisture and

dirt from getting underneath the antenna and onto the

connectors, you can use an O-ring (2.050 inches in

diameter by 0.103 inch wide, silicone or ethylene-

propylene) if the mounting surface is smooth, or adhesive

caulking if the surface is rough.

For complete details about sealing the antenna to a flat mounting

surface, or for information about mounting antennas on poles, see

Mounting Antennas at the Field Site on page 7-27.

Note

Mounting the Modem

For quick bench set-up, you probably do not need to mount

the modem to a surface or in an enclosure, as it would be

mounted in an OEM product for use in the field.

If you do wish to fasten the modem to a rigid structure, you

will need six M3 screws (see mounting holes in Figure 2-1).

For details, see Modem Mounting Guidelines on page 7-19.

For details on acceptable environmental conditions for the

modem, see Environmental Specifications on page 7-30.

For a tip on how to mount the modem and antenna using a

box, see Connecting and Mounting the Antenna on page 2-9.

Grounding the System

You have several options for grounding the modem; see

Grounding on page 7-18.

The RF connector ground is the same as the signal and power ground.

Incorrectly wiring these grounds could cause ground loops in the final

installation.

Caution

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Providing Power to the Modem

The GSP-1620 modem requires input DC power of 5.6 V to

16 V, 1 Amp (maximum), with a maximum of 50 mV

peak-peak ripple and noise.

Using the contents of the Modem Integrator’s Kit, you can

power your bench modem in two ways:

•

Use the AC adapter on the Diagnostic cable

Use an optional DC power supply connected to the

Interface cable bridle — this allows you to monitor exact

power levels

The use of a fuse is strongly recommended in the DC power

supply. A fuse with a minimum melting I t rating of 0.02 A

seconds will be sufficient. For complete details about DC

power requirements and power supply impedances, see DC

Power on page 7-15.

For a quick bench setup or service programming, consider just using the

provided AC adapter to power the modem.

Tip

You CANNOT have both a DC power supply and the AC adapter

connected to the modem at the same time. This may cause the modem

to fail to power up and may damage the modem.

Caution

The following power-on procedure is suitable for a bench setup.

However, if you are developing modem applications, follow the

power-on process explained in Power-On on page 7-17.

Note

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TO POWER THE MODEM USING THE KIT’S AC ADAPTER

Steps

1. On the Modem Interface cable bridle (shown in Figure

2-2), locate the DC POWER (red) and SIG GND (black)

connectors. Then electrically isolate each connector by

capping or taping it.

Since you will be using the AC adapter instead of a DC

power supply, it is important to isolate the DC power

connectors to prevent shock.

2. On the Modem Interface cable bridle (shown in Figure

2-2), locate the RESET lead (yellow). Electrically isolate

the RESET lead by capping or taping it.

The RESET lead is designed to reset the GSP-1620

modem whenever it is grounded for five seconds.

Electrically isolating the lead prevents it from grounding

and inadvertently resetting the modem.

3. Locate the power connector in the middle of the

Diagnostic cable (as shown in Figure 2-3), then plug the

the AC wall adapter cable into the power connector.

4. Tighten the lock ring on the adapter cable onto the

locking threads of the power connector, so the adapter

plug remains firmly seated in the power connector.

The lock ring prevents the adapter cable and Diagnostic

cable from inadvertently disconnecting and interrupting

power to the modem.

5. Make sure the switch on the Diagnostic cable is set to

“POS 1 DTR to GND.”

When this switch is set to “POS 1 DTR to GND,” DTR is

asserted on the Diagnostic cable and the modem will

power up immediately when power is applied.

6. Plug the AC wall adapter (as shown in Figure 2-3) into an

AC power wall outlet.

You are now ready to use the modem.

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To power off the GSP-1620 modem, set the DTR switch to “POS 2 DTR

Caution

Open,” wait at least 10 seconds, and then disconnect power. Setting the

DTR switch to “POS 2” allows the modem to gracefully shut down. If the

modem is powered off without allowing it to go through its shutdown

sequence, some service programming values may be lost.

TO POWER THE MODEM USING AN OPTIONAL DC POWER

SUPPLY

Steps

1. Obtain an optional DC power supply, making sure that it

meets the specifications described at the beginning of this

section.

2. On the Modem Interface cable bridle (shown in Figure

2-2), locate the RESET lead (yellow). Electrically isolate

the RESET lead by capping or taping it.

The RESET lead is designed to reset the GSP-1620

modem whenever it is grounded for five seconds.

Electrically isolating the lead prevents it from grounding

and inadvertently resetting the modem.

3. Plug the DC POWER (red) and SIG GND (black) leads

from the Modem Interface cable bridle into your DC

power source.

4. Turn on the power supply.

You are now ready to use the modem.

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Quick Bench Set-Up

Setting Up HyperTerminal to Talk to the Modem

To talk to the modem you will need HyperTerminal or a

similar program on your computer. If you are using an

operating system other than Windows, you can use any

application that can talk to a serial port.

For bench setup, you probably want to run HyperTerminal on the

computer connected to the Control port of the modem. For testing

purposes, you can run two different HyperTerminal sessions, one

connected to the Control port and one connected to the Data port.

Note

TO SET UP HYPERTERMINAL AND CONNECT TO THE MODEM

Steps

1. Set up HyperTerminal with the correct port and speed

information for the appropriate port (or both ports, if you

have two HyperTerminal sessions).

The following are the recommended HyperTerminal

settings for the Control and Data ports:

Name

Control port: GSP1620_Control

Data port: GSP1620_Data

Connect using

Bits per second

Computer COM port connected to

modem Control port or Data port

Control port: 9600 (fixed)

Data port: 38400 (default, but can

vary from 300 to 115200)

Data bits

Parity

None

Stop bits

Flow control

Control port: None

Data port: Hardware (default and

recommended, but can vary from

None to Software)

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2. In HyperTerminal, click OK to accept the settings.

HyperTerminal automatically attempts to connect to the

modem, and the modem powers on when HyperTerminal

asserts the RS-232 DTR signal. Once it has connected you

should see the following within a few seconds:

SELF TEST RESULT: OK

Note: The SELF TEST RESULTmessage appears only

during modem power-up. If the Diagnostic cable has been

connected and its switch is set to “POS 1 DTR to GND,”

then the modem has already powered up. In that case,

proceed to step 3 without waiting for the message.

3. Type ATand press Enter.

If the HyperTerminal port connection is correctly

configured, the modem should respond with:

You can connect to the modem at any time by clicking HyperTerminal’s

Connect button.

Tip

Testing the Modem Setup

To ensure that the modem was set up correctly and that the

ports are working, you can check the following:

•

Control port baud rate

Data port baud rate

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Quick Bench Set-Up

TO CHECK THE BAUD RATE ON THE CONTROL PORT

Steps

1. Look at the Status bar at the bottom of the

HyperTerminal window.

It should read “9600 8-N-1.” The Control port has a fixed

baud rate of 9600. Be sure HyperTerminal is configured

accordingly.

2. To confirm that HyperTerminal can communicate with

the modem, type ATand press Enter.

The modem should respond with:

TO CHECK THE BAUD RATE ON THE DATA PORT

Steps

■

From HyperTerminal (probably on the Control port),

type:

AT+IPR?and press Enter.

The modem should respond with the following:

+IPR:38400(or whatever the current baud rate is)

38400 is the default setting for the Data port. If you

change the baud rate setting for the modem’s Data port,

be sure to configure HyperTerminal accordingly.

You can enter AT+IPR?on either the Control port or the Data port, but

it always responds with the baud rate of the Data port.

Note

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Resetting or Powering Off the Modem

This section suggests some procedures suitable for resetting

or powering off your bench modem.

If you are developing modem applications, you should

consider additional issues for these topics, in the following

sections: DTR/DSR Signal and Power On/Off on page 7-7,

Power-Off on page 7-18, Hard Power Reset on page 7-18.

TO RESET THE MODEM

Steps

1. On the Modem Interface cable bridle (shown in Figure

2-2), locate the RESET lead (yellow).

2. Ground the RESET lead for at least five seconds to reset

the modem.

When you are not using the RESET lead, cap or tape it to isolate it

electrically. This prevents it from grounding and inadvertently resetting

the modem.

Tip

TO POWER OFF THE MODEM

Steps

1. If you are running a HyperTerminal session, disconnect

from the modem by clicking HyperTerminal’s Disconnect

button.

2. Disconnect or close all other applications accessing the

modem’s serial ports (such as another HyperTerminal

session or the Globalstar User Terminal Program

Support Tool [UTPST]). It is not necessary to physically

unplug the Modem Interface cable or Diagnostic cable

from the modem.

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Quick Bench Set-Up

3. If the Diagnostic cable is connected to the modem, set the

switch to “POS 2 DTR Open.”

When this switch is set to “POS 2,” DTR is de-asserted on

the Diagnostic cable and the modem begins its shutdown

sequence.

4. Wait at least ten seconds for the modem to perform

shutdown operations and save information in memory.

The modem powers off approximately nine seconds after

all ports are disconnected (including the Diagnostic port

via the switch on the Diagnostic cable).

5. You can now safely disconnect the power supply from the

modem.

Do not unplug the power cables while the modem is powered up,

or while the switch on the Diagnostic cable is in “POS 1.” This can

cause ESD damage to the modem and also presents a danger of

electrical shock.

Warning

When the Diagnostic cable is connected but you are not using the

UTPST to service-program the modem, leave the Diagnostic cable

switch set to “POS 2.”

Tip

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Where to Go Next

Now that the GSP-1620 modem has power and you can

communicate with it, here is where to go next:

To do this:

Go to:

■

Service-program the modem to work

Chapter 3

within the Globalstar system and with

your Service Provider

■

Check whether the modem has Globalstar

service

Make a simple packet data call from the

modem, over-the-air

Chapter 4

■

Develop software applications to work

with GSP-1620 modem features,

Chapter 5

including Data and Control ports, Short

Messaging Service, Globalstar alerts,

position location determination, packet

data, IP addressing, dormant mode,

asynchronousdata, mobile-originatedand

mobile-terminated data calls

■

Refer to syntax, descriptions, and values

for supported AT commands

Chapter 6

Chapter 7

■

Integrate GSP-1620 modems into

market-specific OEM products

Refer to a hardware description of the

modem, including mechanical

descriptions, specifications, user

interfaces, port signaling and pinouts,

and grounding

■

Mount modems in enclosures

Mount antennas on-site

Refer to modem hardware and

environmental specifications

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SERVICE-PROGRAMMING MODEMS

QUALCOMM Globalstar GSP-1620 Satellite Data Modems

work within the Globalstar satellite system, using “airtime”

offered by a Service Provider (SP). To operate, each GSP-1620

modem must be service programmed, meaning that certain

key parameters (such as the Globalstar IMSI) must be

configured to work with the SP.

For service programming, you connect the modem’s

Diagnostic port to a Windows 98/NT/2000 PC, using the

Diagnostic cable included in the Modem Integrator’s Kit. On

the PC, you run the Globalstar User Terminal Program

Support Tool (UTPST), which is included in your Modem

Integrator’s Kit.

This chapter discusses how to coordinate with your SP to

service-program GSP-1620 modems, including the following

topics:

•

UTPST overview

Using the UTPST

Re-programming default parameters

Bulk-programming modems

Upgrading modem software

This chapter does not discuss how to install the UTPST

software, nor does it provide complete details on how to use

the UTPST.

For detailed UTPST information, see the Globalstar UT Program

Support Tool User’s Guide (80-98225-1) in your kit. For details about all

service programming parameters, see the Globalstar User Terminal

Service Programming Guide (80-98482-1).

Note

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UTPST Overview

The Globalstar User Terminal Program Support Tool

(UTPST) lets you view, change, and save information

pertaining to a Globalstar User Terminal (modem or phone).

You can:

•

Configure system settings (that is, service program),

either directly via the UTPST’s graphical user interface,

or by writing scripts that access the UTPST’s Scripting

API.

•

Save configuration settings to a UTPST file or open them

from a file.

Swap or transfer configuration settings from one modem

to another.

•

Configure and generate summary data files.

View modem information or statistics.

Upgrade modem software.

To order Globalstar User Terminal Program Support Tools

(QUALCOMM part number: MCN 64-C1005-4), contact QUALCOMM

Globalstar Customer Service, as described in Appendix D.

Note

Using the UTPST

This section tells how to connect the Diagnostic cable to a

modem in preparation for using the UTPST.

TO CONNECT A MODEM TO A PC FOR USING THE UTPST

Steps

1. Connect the Diagnostic cable to the Diagnostic port on the

modem and to an available COM port on your PC, as

shown in Connecting the Diagnostic Cable on page 2-7.

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Service-ProgrammingModems

2. Make sure the power connectors of the Modem Interface

cable are not connected to a DC power supply.

3. Make sure the switch on the Diagnostic cable is set to

“POS 1 DTR to GND.”

When this switch is set to “POS 1,” DTR is asserted on the

Diagnostic cable and the modem will power up

immediately when power is applied.

4. Connect the AC adapter to the Diagnostic cable and to an

AC outlet, as shown in Providing Power to the Modem on

page 2-12.

If you use the AC wall adapter for service programming the modem,

make sure the power connectors of the Modem Interface cable are not

connected to a DC power supply. You CANNOT have both a DC power

supply and the AC adapter connected to the modem at the same time.

This may cause the modem to fail to power up and may damage the

modem.

Caution

TO INSTALL, RUN, AND USE THE UTPST

Steps

Note

■

See the Globalstar UT Program Support Tool User’s

Guide (80-98225-1) in your kit for detailed information.

Connecting the UTPST to a modem requires you to enter a valid

six-digit Service Programming Code (SPC). Use the default SPC

(six zeros: 000000)unless you have been given another one.

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Re-programming Default Parameters

A GSP-1620 modem leaves the factory with a default set of

service programming parameters. Before the modem can be

activated in the field, you must re-program some of those

defaults with valid activation values for the modem’s

particular Service Provider (SP), country, and Gateway.

The first time you use the UTPST, or before you re-program any values,

make a backup copy of the UTPST parameter file.

Caution

Refer to Table 3-1 for a list of key parameters you must set,

then ask your SP for the values to program.

All parameters not mentioned in Table 3-1 are set either to a

factory default value or to a value specified by the Service

Provider. The modem will operate with those default values,

but you could also re-program them, as desired, if your

Service Provider so directs.

Service programming parameters are stored in the modem’s

non-volatile memory. If you connect the Diagnostic cable to the modem

and use the UTPST to change any parameters, it is important that you

de-assert the cable’s DTR (via “POS 2” on the cable’s switch) and wait

at least ten seconds before disconnecting power to the modem.

Otherwise, the service programming information may not be saved in

memory. See TO POWER OFF THE MODEM on page 2-18.

Caution

For more information about all service programming parameters,

including defaults and value ranges, see the Globalstar User Terminal

Service Programming Guide (80-98482-1).

Tip

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Service-ProgrammingModems

Table 3-1. Service Programming Parameters You Must Set

Parameter /

Default

Description

Action Required

for the Modem to Operate

Globalstar IMSI

(Mobile Country

The 3-digit Mobile Country Code Re-program this parameter from

(MCC) component of the

the factory default setting to a

valid MCC, in accordance with

the activating SP’s instructions.

Code component) Globalstar International Mobile

Subscriber Identity (IMSI). The

MCC component of the IMSI is

Where in UTPST:

Globalstar NAM dialog

generally the same as the Home

Service Provider MCC (but could

be different based on the

Factory default:

Unprogrammed

activating SP’s requirements).

Globalstar IMSI

(Mobile Network

The 1- to 3- digit Mobile Network Re-program this parameter from

Code (MNC) component of the

the factory default setting to a

valid MCC in accordance with

the activating SP’s instructions.

Code component) Globalstar IMSI. The MNC

component of the IMSI is

generally the same as the Home

Where in UTPST:

Globalstar NAM dialog

Service Provider MNC (but could

be different based on the

Factory default:

Unprogrammed

activating SP’s requirements).

Globalstar IMSI

(Mobile Station

Identification

The mobile station identification

Re-program this parameter from

number (MSIN) component of the the factory default setting to a

Globalstar IMSI.

valid MSIN in accordance with

the activating SP’s instructions.

Number (MSIN)

Where in UTPST:

Globalstar NAM dialog

Factory default:

Unprogrammed

Globalstar Home The home gateway channel on

Re-program this parameter from

Gateway Channel which the modem should look for the factory default setting to a

service. Can be a value from 1

through 124.

valid Home Gateway channel in

accordance with the activating

SP’s instructions.

Factory default:

Unprogrammed

Where in UTPST:

Globalstar NAM dialog

Globalstar Home A numerical identifier

Re-program this parameter from

Gateway ID

representing the Globalstar Home the factory default setting to a

Gateway.

valid Home Gateway ID in

accordance with the activating

SP’s instructions.

Factory default:

Unprogrammed

Where in UTPST:

Globalstar NAM dialog

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Table 3-1. Service Programming Parameters You Must Set

(continued)

Parameter /

Default

Description

Action Required

for the Modem to Operate

Globalstar Home The 3-digit mobile country code

Re-program his parameter from

the factory default setting to a

valid Globalstar Home Service

Service Provider

Mobile Country

Code (MCC)

(MCC) representing the Home

Service Provider. Typically, the

Globalstar Home Service Provider Provider MCC.

MCC is the same as the MCC

Where in UTPST:

component of the Globalstar IMSI

Globalstar NAM dialog

the SP’s requirements).

(but could be different based on

Factory default:

Unprogrammed

Globalstar Home The 1- to 3-digit mobile network

Re-program his parameter from

the factory default setting to a

Service Provider

Mobile Network

Code (MNC)

code (MCC) representing the

Home Service Provider. Typically, valid Globalstar Home Service

the Globalstar Home Service

Provider MCN is the same as the

MCN component of the Globalstar

IMSI (but could be different based

on the SP’s requirements).

Provider MNC.

Where in UTPST:

Globalstar NAM dialog

Factory default:

Unprogrammed

Preferred Service The Preferred Service Provider

Specify a Home Service Provider

Provider (Home

MCC and MNC is the same as the MCC and MNC.

Service Provider) Globalstar MCC and MNC defined

earlier.

Where in UTPST:

Service Providers dialog

Factory default:

Unprogrammed

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Service-ProgrammingModems

Bulk-Programming Modems

If you need to service-program modems in bulk, for instance

to be shipped with OEM market products, you have several

options for how to do this, as shown in Table 3-2.

Table 3-2. Bulk Service-Programming Options

For More Information

Programming Option

Program each modem individually, using the

UTPST’s graphical user interface.

See the Globalstar UT Program

Support Tool User’s Guide,

(80-98225-1), Chapter 5,

“Configuring Phone Settings”; and

the Globalstar User Terminal

Service Programming Guide

(80-98482-1).

Program one modem, save the settings to a file,

then re-program the remaining modems by

reading in the file using the UTPST.

(Note: Some manual programming would still be

required, for example to enter the IMSI for each

modem.)

See the Globalstar UT Program

Support Tool User’s Guide, Chapter

5, “Configuring Phone Settings,”

and Chapter 6, “Saving and

Transferring Phone Settings.”

Write scripts using the UTPST’s Application

Programming Interface (API). The UTPST

Scripting API is a library of functions that access

the data items on a modem directly, without

interacting with the UTPST user interface.

See the Globalstar UTPST Script

API Reference Manual

(80-99114-1).

For instance, you could write a script that reads

configuration values from a database, then use the

UTPST Scripting API to write those values to

modems.

Use another process as required by the activating

Service Provider.

Ask your Service Provider for

details.

Upgrading Modem Software

Sometimes it might be desirable or necessary to upgrade the

software on a GSP-1620 modem. The modem contains two

different kinds of software:

•

Main application software — contains the true

application code for the modem. All Globalstar-specific

code, user interface code, and modem code resides in the

application software.

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•

Boot block software — contains a minimal set of

functionality needed to “boot” the modem (get it started).

Most software upgrades are application upgrades. Upgrading

the boot block software is rarely required.

Once you obtain a software upgrade file from QUALCOMM

Globalstar Customer Service, you can use the UTPST to load

it onto the modem.

TO DETERMINE THE MODEM’S CURRENT SOFTWARE VERSION

Steps

1. Connect your PC to the modem as described in Using the

UTPST on page 3-2 and run the UTPST.

2. In the UTPST’s Phone menu, select Show Phone

Information.

The Phone Information dialog appears, including the UT

Software Version Information, for example, “R5.2.0.”

TO UPGRADE MODEM SOFTWARE

Steps

1. Obtain a software upgrade file from QUALCOMM

Globalstar Customer Service. To contact Customer

Service, see Appendix D.

2. Connect your PC to the modem and run the UTPST.

3. Follow the procedures documented in the Globalstar UT

Program Support Tool User’s Guide, Chapter 8,

“Upgrading Phone Software.”

Upgrading boot block software requires you to short two pins on a

jumper on the modem. See the illustration and instructions in Chapter 8

of the Globalstar UT Program Support Tool User’s Guide.

Note

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MAKING SIMPLE DATA CALLS

This chapter is essentially a quick tutorial that demonstrates

making simple packet data calls from the QUALCOMM

Globalstar GSP-1620 Satellite Data Modem, including the

following topics:

•

Checking modem status

Making simple packet data calls

❑

Making a call from the Data port

Entering Online-Command mode

❑

This chapter assumes that you have connected your modem

as described in Chapter 2 and configured necessary service

programming parameters as described in Chapter 3.

In addition, examples in this chapter assume you have a

Windows PC connected to the modem, where Windows deals

with the TCP/IP and PPP protocols. When you develop

embedded SCADA applications, you can use off-the-shelf

protocol stacks or write your own.

For more detailed information about making packet data calls, see

Using Packet Data on page 5-21. For information about making

asynchronous data calls, see Using Asynchronous Data on page 5-30.

Note

Checking Modem Status

As you test a GSP-1620 modem and develop applications for

it, you will often find it helpful to check the modem’s status.

The AT$QCSTATUS command provides important information

about the modem, including whether it can “see” the

Globalstar Gateway, how strong the Globalstar signal is,

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whether the modem has registered with the Gateway, and the

current call state.

In this case, you will be able to tell whether the modem has

been connected and service programmed properly, and thus

has Globalstar satellite service to the Gateway.

TO CHECK MODEM STATUS

Steps

1. Make sure that the Control port is disconnected, either

physically or by clicking the Disconnect button in a

HyperTerminal session connected to it.

2. Open a HyperTerminal session connected to the Data

port as described in Setting Up HyperTerminal to Talk to

the Modem on page 2-15, then type:

AT$QCSTATUS <Enter>

The modem should respond with a status report similar

to the following:

SERVICE AVAILABLE: YES

SERVICE MODE:GLOBALSTAR

PROVIDER:<your Service Provider’s name>

GATEWAY:<your Gateway’s number>

RSSI:<a number from 1 to 4>

REGISTRATION:<YES>

ROAMING:<NO>

CALL STATE:<IDLE>

CALL TYPE:

CALL DURATION:<0 or duration of last/current call>

CALL NUMBER:<number>

BATTERY CHARGE:<percentage>

Service Status

Brief Description

SERVICE

AVAILABLE

YES if the modem has acquired Globalstar

service; otherwise NO.

SERVICE MODE

PROVIDER

Current service mode (e.g., Globalstar).

Current Service Provider.

GATEWAY

Gateway number (in decimal).

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Making Simple Data Calls

Service Status

Brief Description

RSSI

Received signal strength, from 0 (no signal)

to 4 (strong signal).

REGISTRATION

Current registration status of the modem

with the Gateway: NO (not registered) or

YES (registered)

ROAMING

YES if roaming. NO otherwise.

Current call state, e.g., IDLE.

CALL STATE

CALL TYPE

Service Option being used in the current

call (such as TIA_PPP, TIA_ASYNC,

Markov, Loopback; or blank when no call is

in progress).

CALL DURATION

CALL NUMBER

Duration of the ongoing call or the last

completed call.

Most recently called or currently calling

number.

BATTERY CHARGE

Percentage of battery life remaining.

If the modem and antenna have been set up and service

programmed correctly, SERVICE AVAILABLEshould say YES,

RSSIshould show a signal strength number other than 0, and

REGISTRATIONshould be YES. If the modem has service and is

registered, you can make packet data calls. If not, see

Chapter 8, Troubleshooting.

For more information about the modem status elements returned

by the AT$QCSTATUScommand, see Service Status ($QCSTATUS) on

page 6-62.

Tip

Making Simple Packet Data Calls

This section shows how to make simple mobile-originated

packet data calls from the GSP-1620 modem by sending an

AT command from HyperTerminal to the Data port.

In the process, you get a brief introduction to using the

modem’s Data and Control ports.

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For complete details about making calls and understanding modem port

arbitration issues, see Developing Modem Applications on page 5-1.

Tip

Making a Call from the Data Port

You can make a data call by entering AT commands in

HyperTerminal connected to the modem’s Data port. You will

be able to see the packets streaming, just as a demonstration

that the modem can make a packet data call.

TO MAKE A PACKET DATA CALL USING AT COMMANDS ON THE

DATA PORT

Steps

1. Make sure HyperTerminal is set up on the PC connected

to the modem’s Data port, as described in Setting Up

HyperTerminal to Talk to the Modem on page 2-15.

2. If HyperTerminal is connected to the modem on its

Control Port, you must disconnect it before you can type

AT commands on the Data port. You can leave the cable

plugged into the Control port, but disconnect from the

Control port using HyperTerminal (click the Phone icon).

3. In HyperTerminal, initiate the call on the Data port by

typing ATD#777.

#777 is a special number that tells the modem to establish

a packet data call. HyperTerminal responds with

CONNECT. You will see random characters streaming on

the screen, with an initial tilde “~” character to indicate

that this is packet data.

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Making Simple Data Calls

Entering Online-Command Mode

While a packet data call is in progress on the Data port (the

modem is in Online mode), you can interrupt the data stream

so the modem will respond to AT commands. This puts the

modem into Online-Command mode.

TO ENTER ONLINE-COMMAND MODE

Steps

1. While the data call is in progress on the Data port, in

HyperTerminal, type this escape sequence: +++.

HyperTerminal responds with OK.

2. Type AT$QCSTATUS <Enter>.

The modem responds with a status report. Notice that the

CALL TYPEfield reads TIA_PPP, indicating that the data

call is still in progress.

3. To terminate the call, type ATH <Enter>.

For more information about Online-Command mode, see Change from

Online to Online-Command Mode (+++) on page 6-40.

Tip

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DEVELOPING MODEM APPLICATIONS

This chapter discusses developing market-specific software

applications to work with the QUALCOMM Globalstar

GSP-1620 Satellite Data Modem, particularly Remote

Monitoring and Supervisory Control and Data Acquisition

(SCADA) applications.

A GSP-1620 modem functions as a 9600 bps full duplex

satellite modem. Applications communicate with the modem

using standard “Hayes Modem” AT commands, or

initialization strings.

This chapter includes the following topics:

•

Recommended development tools

SCADA application components

Packet/asynchronous data overview

Modem application scenarios

Working with modem features (including using Data and

Control ports, Globalstar satellite service, Short

Messaging Service, Globalstar alerts, and position

location determination)

•

Using packet data (including networking software and

PPP sessions, IP addressing, dormant mode,

mobile-originated and mobile-terminated packet data

calls, and roaming)

Using asynchronous data (including mobile-originated

and mobile-terminated asynchronous data calls,

accessing packet data over an asynchronous connection,

and roaming)

Typical modem initialization strings

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For complete reference information about all modem-supported AT

commands, including syntax, descriptions, default values, and results

Note

returned, see Chapter 6, AT Command Reference.

Recommended Development Tools

The following tools are recommended for developing

GSP-1620 modem applications:

•

A Windows computer — because the Modem Integrator’s

Kit CD-ROM contains code samples for Windows

HyperTerminal (or any program that talks to a serial

port) for testing AT command strings

Perl — because the code samples on the CD are written in

Perl; however, you can use whatever programming

language you choose (for example, C)

The CD-ROM in your Modem Integrator’s Kit contains code samples for

some typical modem application initialization strings.

Tip

SCADA Application Components

Working with a GSP-1620 modem, a SCADA application can

retrieve process control and alarm data automatically from

remote sites, using unmanned sensors to monitor operations

and initiate alert notifications.

Figure 5-1 shows the basic components of a SCADA or OEM

application that sits on top of the modem’s software, where:

•

The modem serves as the DCE (data communications

equipment) at the remote site.

•

Your SCADA application serves as the DTE (data

terminating equipment) at the remote site,

communicating with software in the modem through AT

commands sent to either the modem’s Control or Data

ports.

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Developing Modem Applications

•

Data flows to and from the modem over-the-air, using the

Globalstar satellites and Gateways connected to the

Internet (for packet data) or to the PSTN (for

asynchronous data).

A host application (server) manages remote sites (DTEs);

for example a host application might manage data from

numerous remote oil or gas wells.

Figure 5-1. DCE - DTE Application Components

Satellite

Outdoor Antenna

Globalstar

Gateway

GSP-1620

Modem

DCE

Internet (for PPP data)

PSTN (for async data)

Interface Port

Control Port

(modem AT commands)

Data Port

(Data or AT commands)

Host

Server

SCADA Terminal

(running your

Remote

DTE

application software)

(Host application managing remote DTEs)

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Packet/Asynchronous Data Overview

The GSP-1620 modem handles both packet and asynchronous

data connections. For a particular SCADA application, one

may make more sense than the other. Table 5-1 compares the

two types of data.

QUALCOMM Globalstar packet data service has a lower overhead and

faster connection time than asynchronous data does. In general, if a

SCADA application does not specifically need asynchronous data, use

packet data instead.

Tip

For more details about implementation issues specific to one

type of data or the other, see Using Packet Data on page 5-21

and Using Asynchronous Data on page 5-30.

Table 5-1. Packet vs. Asynchronous Data

Packet Data

Asynchronous Data

Connects through a

Globalstar Gateway to the

Internet.

Connects through a Globalstar

Gateway and the PSTN to a

remote host modem.

Packet data is transmitted

over the Internet to a host

server.

Asynchronous data is

transmitted to a dial-up modem

or modem bank, which must be

supplied by the host.

Typically establishes

Typically establishes connection

connection within 2-3 seconds. in approximately 30-60 seconds,

due to modem negotiation and

training time.

No long distance charges

apply, because a connection is

made directly to the Internet.

PSTN long distance charges

may apply.

Degradation of service (in the

transmission of packets) could

occur, depending on Internet

connections and routing.

Degradation of service could

occur, depending on the quality

of lines over the PSTN. (A noisy

PSTN line can lower the data

transmission rate or introduce

errors into the data stream.)

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Developing Modem Applications

Table 5-1. Packet vs. Asynchronous Data (continued)

Packet Data

Asynchronous Data

May require a VPN and

software to get past firewalls.

May be able to directly connect

inside a firewall.

Mobile-terminated calls

require either a fixed public IP

address, or a fixed private IP

address and VPN tunnel to

the Gateway (see

Mobile-Terminated Packet

Data Calls on page 5-27).

Mobile-terminated calls can be

achieved by having the host

modem dial the phone number

of the GSP-1620 modem.

Modem Application Scenarios

Depending on the requirements of your SCADA or OEM

application, you can configure the GSP-1620 modem to work

in many different ways, using many different features. The

following are sample scenarios for how the modem might

work in a SCADA setting:

•

Scenario 1 — Full-time packet data on-demand:

❑

The modem can both generate data or accept it from

the Gateway (see Mobile-Originated Packet Data

Calls on page 5-27 and Mobile-Terminated Packet

Data Calls on page 5-27).

❑

The modem uses dormant mode, where traffic

channel is automatically reestablished upon receipt

of PPP traffic at the modem end or IP traffic at the

Gateway end (dormant mode works for packet data

only).

❑

Since the application developer is responsible for

security issues, the application might want to query

for a password or answer calls only at certain times or

only from certain phone numbers.

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•

Scenario 2 — A periodic application:

❑

No auto-answer.

❑

Application powers on the modem periodically

(perhaps once a day), queries host for data, then turns

off.

❑

Application powers on the modem periodically and

sends data to the host.

Useful where power usage is critical, perhaps due to

limited battery charge.

•

Scenario 3 — Asynchronous data application:

❑

The SCADA application keeps the GSP-1620 modem

powered up to accept incoming calls.

A modem at the host server dials the GSP-1620

modem, which toggles the Ring Indicator (RI).

The SCADA application decides whether to answer

the asynchronous call or whether to call back.

Any of these scenarios might be appropriate, for example, for

a SCADA application that monitors pipelines or gas wells,

depending on how much data is generated on-site and how

often the host application needs to access that data.

As these sample scenarios show, you can configure an

application for the GSP-1620 modem in many ways,

depending on factors such as the following:

•

How you decide to use the modem ports

Which operating systems you use

How you want your application to operate

How the SP wants to handle billing (by airtime or by byte;

contact your SP for details)

•

Whether the application will use packet or asynchronous

data connections

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Developing Modem Applications

Working with Modem Features

This section discusses key features of the GSP-1620 modem

and how to use them programmatically in your application.

The features discussed in this section work with either packet

data or asynchronous data. For packet-specific features, see

Using Packet Data on page 5-21. For asynchronous-specific

features, see Using Asynchronous Data on page 5-30.

Using Data and Control Ports

The GSP-1620 modem has two serial ports: one for Data and

one for Control. The Data and Control ports make up the Rm

interface, which is the serial interface between the DTE (your

application) and the DCE (GSP-1620 modem), as shown in

Figure 5-2.

Figure 5-2. DTE-to-DCE Rm Interface

Um Interface

Rm Interface

Data Port

Control Port

TxD

RxD

DTR

DSR

RFR (RTS)

CTS

RLSD (DCD)

DCE

DTE

(GSP-1620

Modem)

(SCADA

Application)

TxD

RxD

DTR

DSR

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The Um interface shown in Figure 5-2 is the dedicated

wireless traffic channel between the GSP-1620 modem (DCE)

and the Gateway Interworking Function (IWF).

Table 5-2 shows the signal lines for each port in Figure 5-2.

The modem signal naming convention assumes that the modem is the

DCE and that the user application is the DTE.

Note

Table 5-2. Port Signal Lines

Data Port

Control Port

GND - Signal Common

TxD - Transmit Data

RxD - Receive Data

GND - Signal Common

TxD - Transmit Data

RxD - Receive Data

DTR - Data Terminal Ready

DSR - Data Set Ready

DTR - Data Terminal Ready

DSR - Data Set Ready

RFR (RTS) - Ready for Receive

CTS - Clear To Send

RLSD (DCD) - Data Carrier

Detected

RI -Ring Indicator

For a complete description of port hardware, including pinouts, see Data

and Control Ports on page 7-6.

Note

Data and Control Port Configurations

For a data application, you can set up the modem to use

different configurations of the Data and Control ports:

•

Data port only — AT commands can be sent to the

modem only when there is no data session active (i.e., no

data is coming across the port) or when a data session is

active but the Data port is in Online-Command mode.

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Developing Modem Applications

•

Control port only — only AT commands can be sent to

modem (no data).

Data and Control ports — the DTE can receive data on

the Data port and, at the same time, communicate with

the modem on the Control port using AT commands.

The different Data and Control port configurations above are

based on which ports are defined as active:

•

A port is active if DTR is asserted on that port.

A port is inactive if DTR is de-asserted on that port.

Using both the Data and Control ports allows more

sophisticated communication with the modem and thus

better control of it, but requires that you understand the

modem’s port arbitration behavior.

In this context, port configuration refers to which ports on the GSP-1620

modem are active, rather than to port baud rate, parity, etc.

Note

Port Arbitration Behavior

This section describes the modem port arbitration behavior

for each of the following port configurations:

•

Data port active only

Control port active only

Both Data and Control ports active

When a port configuration change occurs due to a DTR

change, the AT command configuration parameters

maintained by the AT command processor are not modified or

reset to their default values. The parameters’ current state

will be associated with the newly activated port when the

change occurs. An AT command in progress when DTR

changes will be silently aborted.

Table 5-3 summarizes modem port arbitration behavior.

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Table 5-3. Port Arbitration Behavior

Control

Port Active

Data Port

Active

Port Behavior

Control and Data ports are inactive and modem is powered

down unless the Diagnostic port is active.

Yes

The Data port processes all data and AT commands,

including the following:

■

Online-Command mode is supported on the Data port.

■

All port configuration commands apply to the Data port

as defined in Port(s) Affected by AT Commands on page

5-13.

■

If a non-data call (e.g., Markov, Loopback) is already

active when a call is attempted with the ATDcommand,

the BUSYresult is returned. If a data call is active, a NO

DIALTONE result is returned.

DTR cannot be used to terminate a call or enter

Online-Command state (AT&D2or AT&D1

configurations), unless the Diagnostic port is active.

Note: This is because the modem powers down if all

DTRs are low. DTR can be used to terminate the call or

enter Online-Command mode, although the modem will

power down after approximately 1 second.

Yes

All AT commands are processed on the Control port. Data

calls are not supported because the Data port is inactive.

■

All data calls initiated using the ATDcommand return

NO DIALTONE.

■ ATD<phone number>returns NO DIALTONE.

■

The ATDcommand with #627568(Markov test call) or

#56672225 (Loopback test call) dial strings initiates a

call if a call is not already active. If a call is already

active when the call is attempted, a BUSYresult is

returned.

■

Port configuration commands apply to the Data port

and Control port as defined in Port(s) Affected by AT

Commands on page 5-13.

■

The online escape sequence “+++” surrounded by guard

time is ignored.

Online-Command mode command ATHreturns OK.

ATHwill terminate an active test call.

Online-Command ATOreturns NO CARRIER.

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Table 5-3. Port Arbitration Behavior (continued)

Control

Port Active

Data Port

Active

Port Behavior

Yes

All AT commands are processed on the Control port. The

Data port is used only for the transfer of packet or

asynchronous data resulting from a data call.

AT commands received on the Data port are ignored.

■

A packet data call can be initiated on the Data port by

sending a PPP packet; for details, see Packet No Dial

($QCPKND) on page 6-50.

■ ATD#777received on the Control port initiates a packet

data call on the Data port. If a non-data call (e.g.,

Markov, Loopback) is already active when the call is

attempted, a BUSYresult is returned. If a data call is

active, an ERRORresult is returned.

■ ATD<phone number>received on the Control port

initiates an asynchronous data call on the Data port.

If a non-data call (e.g., Markov, Loopback) is already

active when the call is attempted, a BUSYresult is

returned. If a data call is active, an ERRORresult is

returned.

■

The ATDcommand received on the Control port with

#627568(Markov test call) or #56672225(Loopback

test call) dial strings initiate a call if a call is not already

active. If a non-data call is already active when the call

is attempted, a BUSYresult is returned. If a data call is

active, an ERRORresult is returned.

■

Port configuration commands apply to the Data port

and Control port as defined in Port(s) Affected by AT

Commands on page 5-13.

■

Online-Command mode is not supported on the Data

port.

The online escape sequence “+++” surrounded by guard

time is ignored on both ports.

■ ATHreceived on the Control port terminates an active

data call or special test call. It returns OKwhether or not

a call is active.

■ ATOreceived on the Control port returns OKif a call is

active; otherwise, it returns NO CARRIER.

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AT Command Processing Modes

Data services AT command processing consists of three

modes:

•

Command mode — While in the Command mode, data

service is inactive and the DCE processes AT commands

received on the Rm interface.

•

Online mode — Online mode is entered when a data

connection is established and data service becomes

active. While in the Online mode, the DCE does not

recognize AT commands on the Rm interface, but does

process in-band control data and software flow control

data.

•

Online-Command mode — During Online-Command

mode, data service is in the active state, although data is

not processed. The DCE processes all AT commands

received on the Rm interface while in Online-Command

mode.

TO ENTER ONLINE-COMMAND MODE FROM ONLINE MODE

Steps

■

Use an in-band control data escape sequence, “+++”

surrounded by guard time (see Change from Online to

Online-Command Mode (+++) on page 6-40).

Turn OFF the Rm interface DTR (circuit 108/2) signal

(see DTE Data Terminal Ready Behavior (&D) on page

6-16 for details).

TO TERMINATE A DATA CALL FROM ONLINE-COMMAND MODE

Steps

■

Use the ATHcommand (see Hook Control (H) on page

6-22).

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TO RE-ENTER ONLINE MODE FROM ONLINE-COMMAND MODE

Steps

■

Use the ATOcommand (see Return to Online Data Mode

(O) on page 6-23).

Port(s) Affected by AT Commands

Various AT commands modify port configurations or initiate

actions on a port. Since the modem has both a Data and

Control port that can receive AT commands, the port affected

by the received AT command is defined for each applicable

port configuration. Port configuration is defined by which

ports are active (DTR asserted).

Mapping the effects of an AT command to a particular port, or

possibly ports, largely results from two factors: the AT

command processor is single-threaded, and the Control and

Data ports share a single instance of the AT command

processor.

In this single instance of the AT command processor, a table

defines default values and the state of each configurable

parameter associated with each AT command. This default

and configuration data for each command applies to one or

both ports, depending on the port configuration. Most

commands do not modify these configurable parameters.

Those commands that do modify parameters affect only the

port processing the AT commands, with some exceptions. The

exceptions, which are listed in Table 5-4 on page 5-14, are due

primarily to the following unique attributes of the Data port:

•

The Data port supports data (packet and asynchronous).

The Data port supports configurable baud rate and

handshake signals.

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Nomenclature for Table 5-4

Table 5-4 defines the port(s) affected by AT commands that

may modify parameters other than those of the active AT

command port. The affected port(s) are listed for each of the

following three port configurations:

•

Data port active only

Control port active only

Both Data and Control ports active

To define the affected port(s) for each AT command listed and

for each of the three port configurations, Table 5-4 uses the

following nomenclature:

•

DATA — Applies to Data port

CTL — Applies to Control port

BOTH — Applies to both Data and Control ports

NA — Not applicable to a port with this active port

configuration or not applicable to a port in general

Table 5-4. Port(s) Affected by AT Commands

Port Command Applies To:

Control Port Data & Control

AT Command

Description

Data Port

Active Only

Ports Both

Active

Reset to Default

Configuration

DATA

BOTH

DATA

BOTH

DATA

BOTH

DCE RLSD (DCD)

Behavior

DTE DTR

Behavior

Set to Factory

Defined Default

Configuration

S777

+ICF

Silent Retry

Timeout

DATA

CTL

Character

Framing Settings

DATA

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Developing Modem Applications

Table 5-4. Port(s) Affected by AT Commands (continued)

Port Command Applies To:

AT Command

Description

Data Port

Active Only

Control Port

Active Only

Data & Control

Ports Both

Active

+IFC

+IPR

+CRM

+CTA

Local Flow Control

Settings

DATA

RmInterfaceBaud

Rate Setting

Rm Interface

Protocol Setting

Dormant Mode

Timeout Setting

Port Activation (DTR) Changes during Operation

When DTR changes on the Data or Control ports, the

following operational changes occur:

•

Any AT command being processed on the Control or Data

ports is terminated and the port that processes AT

commands, based upon the arbitration rules (see Port

Arbitration Behavior on page 5-9), is placed in a state to

begin processing of a new AT command.

•

If a call (data or special test call—Markov or Loopback) is

in progress, changes in DTR on the Control port will not

terminate the call.

If a call (data or special test call) is in progress, changes

in DTR on the Data port will terminate the call if the port

is configured to do so with AT&D2. Additionally, if none of

the DTR lines are asserted, the module will power down

terminating the call regardless of the AT&Dsetting (See

Power-On and Power-Off on page 7-18).

AT command configuration parameters maintained by the AT

command processor are not modified or reset to their default

values when a port configuration change occurs due to a DTR

change. The current state of these parameters is associated

with the newly activated port after the change occurs, as

defined in Table 5-4.

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For DTR signal timing requirements, see Changing Data and Control

Port Configuration on page 7-8.

Note

Port Use During Power On and Power Off

The Data and Control ports provide a feedback mechanism to

inform the user when power on and power off are complete.

The modem powers on when either or both of the ports’ DTR

signals are asserted. The DSR signal is asserted on either or

both active ports to inform the user that the modem has

completed its start-up sequence and is ready to process AT

commands.

When the DTR signals of both ports are de-asserted for

approximately one second, the modem begins its shutdown

sequence. When this is complete, the modem powers off and

the ports’ DSR signals are de-asserted. This informs the user

that power may be removed, which may be required in

battery-powered applications.

The above discussion assumes that the Diagnostic port is not

active. This port’s DTR signal does affect power on and power

off, but the port provides no user feedback. The Diagnostic

port is designed for development and service-programming

use only.

For complete details of the power on and power off process, see

Power-On and Power-Off on page 7-18.

Note

Globalstar Satellite Service

The QUALCOMM Globalstar GSP-1620 Satellite Data

Modem offers full duplex (FDX) transmit and receive

capabilities at 9600 bps via the Globalstar satellite

constellation, and uses QUALCOMM’s CDMA digital

technology for reliability.

The Globalstar Air Interface (GAI) is based on a modified

(proprietary) IS-95A standard adapted for Mobile Satellite

System (MSS) operations:

•

Forward Link (Modem Receive): 2484.39 to 2499.15 MHz

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•

Reverse Link (Modem Transmit): 1610.73 to 1625.49

MHz

Short Messaging Service (SMS)

The GSP-1620 modem supports IS-637 Mobile Terminated

Short Messaging Service (SMS). This is a separate feature

from data (packet and/or asynchronous), and may be billed

differently by the Service Provider.

Mobile-terminated SMS allows the host application to “send”

numeric, alphanumeric, or binary messages to the GSP-1620

modem. These messages are passed transparently out the

Data or Control RS-232 ports to the DTE (SCADA

application). The modem makes no attempt to construct

ASCII character data. If “control” data is sent to the modem

via the SMS option, it will be passed along transparently to

the DTE application.

The SMS feature is fully functional even if the GSP-1620

modem is active on a data call, because SMS can be accessed

on the Control port. Therefore, the host application can send

command and control information to the modem either while

it is in a data session, or idle (not in a call).

Check with your Globalstar service provider to see whether the SMS

feature is available.

Note

SMS Alerts

SMS “alerts” are asynchronous messages sent out of the Data

or Control port to the DTE application upon receipt of the

SMS message (see Using Data and Control Ports on page 5-7

for a more detailed explanation).

Port configuration determines how SMS alerts are received:

•

If the application is using the Control port, SMS alerts

are received on the Control port, even if a call is active.

•

If the application is using the Data port only, the SMS

alert will be queued until the data session is terminated.

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Once the DTE application receives an SMS alert, it is up to

the application to read the SMS message, using the

AT$QCSMSPcommand.

SMS Message Field Information

SMS messages can contain the following field information:

•

Length of SMS

Read status (new/read)

Lock status

Call back number (if available)

Type (alpha, numeric, voice mail — these are

carrier-specific fields)

•

Priority (urgent, normal)

Time received

Message content

SMS AT Commands

You can use the following SMS commands:

•

Navigate through SMS messages (AT$QCSMSM).

Delete SMS messages (AT$QCSMSM).

Print/display current SMS message (AT$QCSMSP).

Lock or unlock SMS messages (AT$QCSMSL).

Turn on/off SMS alerting (AT$QCSMSA).

Get information on SMS messages stored in memory

(AT$QCSMSI).

For more information, see SMS Commands on page 6-51.

Note

Using SMS for Mobile-Terminated Calls

You can use SMS as a way of answering mobile-terminated

calls (even if the Gateway software does not yet support

mobile-terminated calls).

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Here is a brief description of how such a scenario might work:

•

The modem is idle.

The host application sends a short SMS message to the

modem from the Gateway, perhaps using an email

account on the Internet. (A sample email address might

be “[email protected].” This is an example

only. Contact your Service Provider to get the latest SMS

message address format for your modem.)

•

Your DTE application has set up the modem to listen for

SMS messages, in one of two ways:

❑

By turning SMS alerting on (using AT$QCSMSA).

❑

By having the DTE application poll for messages with

a timer (using the AT$QCSMSIcommand).

•

When the modem gets an SMS alert, it notifies the DTE

application.

The DTE application queries the modem for the SMS

message (using AT$QCSMSPand/or AT$QCSMSM).

The DTE application parses the message, looking for

strings that tell it to connect to the host application.

The DTE originates a data call (packet or asynchronous).

Once the call has been established, the modem functions

simply as a “pipe” for data between the host server and DTE

applications.

See the CD-ROM in your Modem Integrator’s Kit for a sample SMS

script. Also see SMS Commands on page 6-51.

Note

Globalstar Service Alerts

Service alerts are sent on the Control port or queued (if only

the Data port is connected and in use) whenever a service

parameter changes:

•

Fades — Gateway/satellite coverage is lost for any

reason.

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•

Acquisition — Gateway/satellite coverage is acquired

(entering service, leaving service, or changing Service

Providers).

Roaming status — when the modem “roams” onto a

Gateway outside the home service area (see your Service

Provider for the scope of these areas).

For more information, see Service Alert ($QCSA) on page 6-61.

Note

Service Status Message

The AT$QCSTATUScommand gets the Service Status Message,

which you can think of as a message detailing the information

that would display on the LCD screen of the GSP-1600

Tri-Mode Phone. The Service Status Message includes the

following items:

•

Service available (yes or no)

Current service mode

Current Service Provider name

Gateway coverage “seen” (acquired) or lack of coverage

(lost)

•

Received signal strength (RSSI bars on the phone

display)

•

Gateway registration status (“i” indicator on the phone)

Roaming (yes or no)

Current call state (in call/idle)

Call type

Call duration

For more information, see Checking Modem Status on page 4-1 and

Service Status ($QCSTATUS) on page 6-62.

Note

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Position Location Determination

The GSP-1620 modem has a “get position” AT command,

AT$QCPLS, that provides a latitude and longitude location as

well as a confidence value.

This command has a parameter to select between getting the

current position (via making a new request) or returning the

last stored position:

•

If you select the current position and you are NOT in a

call, the modem returns “ERROR.”

•

If you select the stored position and there is no stored

position (you have never done a position request), the

modem returns “ERROR.”

For more information, see Position Location Service ($QCPLS) on page

6-66.

Note

Using Packet Data

Globalstar and the GSP-1620 modem offer direct Internet

connectivity by bridging the “last thousand mile” air gap

using LEO satellites. This section details the capabilities

offered by the GSP-1620 modem for user connectivity and

packet data transmission.

The GSP-1620 modem lets the application device (DTE)

connected to the modem originate or receive a “packet data

call.” It establishes a PPP session, connects to the Internet,

and then establishes a session with a host application at the

remote end.

For a comparison of packet and asynchronous data, see Table 5-1 on

page 5-4. For information about asynchronous data service, see Using

Asynchronous Data on page 5-30.

Note

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Data Rate and Throughput

The GSP-1620 modem offers full duplex transmit and receive

at a Data port rate of 9600 bps. Discounting packet data

overhead bits, the measured effective “user” throughput (that

is, customer data) averages 7400 bps for packet data.

Networking Software and PPP Sessions

The modem uses PPP as the transport mechanism for data

packets. Standard networking software establishes,

manages, and tears down the PPP session. For example, the

networking software is compatible with Dial-Up Networking

(TCP/IP and PPP protocols) on Windows 95/98/NT/2000.

When you develop embedded SCADA applications, you can

use off-the-shelf protocol stacks or write your own. Any

standard RFC 1661 or RFC 1662 compliant stack should

work.

Interoperability with Different Operating Systems

The GSP-1620 modem uses standard networking software to

establish, manage, and tear down the PPP session. The

modem has been tested with the following standard operating

systems:

•

Windows 95/98/2000

Windows NT

Macintosh OS

UNIX/Linux

For Windows 2000, a possible software driver problem exists. For more

information, contact QUALCOMM Globalstar Customer Service, as

described in Appendix D, Product Support.

Note

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IP Addressing for the GSP-1620 Modem

The OEM or Service Provider must choose either a dynamic

or fixed Internet Protocol (IP) addressing scheme, depending

on the intended use of the GSP-1620 modem:

•

If the modem is expected to be mobile and roam between

Gateway service areas, a dynamic IP addressing scheme

should be used. A new IP address may be assigned to the

terminal equipment whenever a new packet data call is

set up.

•

If the unit is “fixed” in its position and no mobility is

involved, either a dynamic or fixed IP addressing scheme

can be used. However, if the unit is “fixed” in its position,

no mobility is involved, and the user’s application

requires a fixed IP address, then a fixed IP addressing

scheme should be used.

The difference is that in a “fixed” addressing scheme the

user’s application at a host site or server will always know the

IP address of the remote DTE (SCADA application). In a

“dynamic” addressing scheme, the IP address is not known

until the remote SCADA application/modem and the

host/server are in an active session. In both the “fixed” and

the “dynamic” addressing scheme, either the SCADA

application/modem or the host/server can initiate a call/IP

session.

Dynamic IP Addressing

A dynamic IP address pool in the Gateway can be configured

with either private IP addresses or globally routable IP

addresses. Therefore, the type of IP address assigned to a

dynamic IP user during call setup depends on the Gateway

configuration. With a dynamically assigned IP address, the

modem can roam to another Gateway and re-establish Packet

Data service by having the system automatically assign a

new dynamic IP address.

With dynamic IP addressing, the modem can initiate a call/IP

session with the host/server. Once a session is established,

the assigned IP addresses remain constant until the session

is terminated. With the added capability of dormant mode

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Integrator’s Reference Manual

(see Dormant Mode Service on page 5-25), the IP address

assigned during this session remains active even during

temporary gaps in air link coverage or when a call is

temporarily released via dormant mode.

Fixed IP Addressing

Fixed IP addresses can be assigned instead of dynamic IP

addresses. With a fixed IP address, the server or host

application can use a given specific IP address that is

permanently assigned to the modem.

In the first Gateway software release that supports modems, fixed IP

addressing requires that private IP addresses be “decoded” from the

modem’s IMSI (International Mobile Subscriber Identity). This precludes

the use of fixed IP addressing with roaming between Gateways.

Note

Finding IP Addresses

If you need more information about your IP addresses, ask

your Service Provider.

Virtual Private Network Service

Since a fixed IP addressing scheme requires the use of private

IP addresses, a virtual private network (VPN; e.g., IPSec) or

an IP-in-IP tunnel would have to be established between the

host and the Globalstar Gateway, so the host can initiate IP

sessions with the remote/SCADA unit.

Contact your network provider for help in establishing a VPN

or dedicated line between your host server and the Gateway.

When using dynamic IP addressing, an end-to-end VPN

connection can be established between the remote/SCADA

unit and the host/server.

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Developing Modem Applications

Dormant Mode Service

With dormant mode service, the Globalstar system can keep

the IP session “up” at the application layer (host and SCADA

applications) while dropping the air link/traffic channel, to

conserve Globalstar resources and to decrease billing time to

the user. The traffic channel is automatically reestablished

upon receipt of PPP traffic at the SCADA application end or

IP traffic at the Globalstar Gateway. The Globalstar system

then completes the transmission, with no loss of user data.

Dormant mode can be entered in two ways:

•

By issuing the ATH777command to the Control port, as

opposed to using the standard ATH(hang up) command,

which would drop the traffic channel and terminate the

PPP session.

•

By using a timer. The idle timer default value is currently

0 (timer is turned off). You can specify a time between 10

and 255 seconds for the idle timer to time out and tear

down the traffic channel.

During dormant mode operations, each use of the traffic

channel to send and receive PPP data will produce one billing

record (called a Call Detail Record or CDR).

TO SET UP DORMANT MODE AND TEST HOW THE CALL GETS

RE-ESTABLISHED

Steps

1. On the Control port, set the idle timer by typing:

ATH+CTA=10 <CR>.

This command sets an idle timer value of 10 seconds.

Note: you can specify a termination character other than

<CR> for AT commands; see Command Line Termination

Character (S3) on page 6-25.

2. Type AT&C0<CR> to ensure that RLSD (DCD) will remain

asserted in dormant mode.

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3. Use Dial-Up Networking to initiate a packet data call on

the Data port.

For help with Dial-Up Networking, see your Windows

documentation.

4. Start a browser, go to a Web page such as

http://www.globalstar.com, and download something.

5. Wait for the data transfer to end, then wait 10 seconds for

the idle timer to expire.

On the Control port, type ATH777<CR> to hang up the call

and immediately put the modem into dormant mode.

6. On the Control port, type AT$QCSTATUS<CR> and observe

how the CALL STATEis IDLE, indicating that the modem

has entered dormant mode.

7. In your browser connected to the Data port, click another

link.

8. On the Control port, type AT$QCSTATUS<CR> and observe

how the CALL STATEis no longer IDLE.

For the above example to work, AT&C0must be set so that DCD

remains asserted in dormant mode. Otherwise, the networking

application will terminate the PPP session. For more information, see

DCE Received Line Signal Detector Behavior (&C) on page 6-16. For

more information about dormant mode, see Set Dormant Mode Timeout

Value (+CTA) on page 6-49.

Note

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Developing Modem Applications

Mobile-Originated Packet Data Calls

The GSP-1620 modem lets the application device (DTE)

connected to the modem originate a packet data call.

TO MAKE A MOBILE-ORIGINATED PACKET DATA CALL

Steps

■

Use the ATD#777command.

The modem returns CONNECTif the call has been

established (for other result codes, see Dial (D) on page

6-20).

For another example, see Making a Call from the Data Port

on page 4-4.

TO HANG UP A PACKET DATA CALL

Steps

1. Enter Online-Command mode by using the in-band

control data escape sequence, “+++” surrounded by guard

time (for details, see Change from Online to

Online-Command Mode (+++) on page 6-40).

2. Use the ATHcommand (to hang up and end dormant

mode).

Use the ATH777command (to hang up but leave dormant

mode active).

Mobile-Terminated Packet Data Calls

The GSP-1620 modem lets the application device (DTE)

connected to the modem receive a packet data call. It is the

responsibility of the DTE application to keep the modem

powered up if it is to receive incoming packet data calls.

However, the first Gateway software release that supports

GSP-1620 modems does not support over-the-air

mobile-terminated calls. Future releases of the Gateway

software will support mobile-terminated calls to fixed IP

addresses, and no modem upgrades will be required.

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The following sections describe how the modem itself would

deal with incoming (mobile-terminated) calls. This

information is provided for developers who wish to configure

their applications for mobile-terminated calls, in preparation

for future releases of the Gateway software.

As an alternative to mobile-terminated calls, you can have the modem

receive an SMS message, then originate a call back to the host. For

details, see Using SMS for Mobile-Terminated Calls on page 5-18.

Tip

If your Service Provider supports Caller ID, you can have the modem

receive a non-packet-data call, then originate a call back to the host. An

incoming non-packet-data call to the DCE would toggle RI and wake up

the DTE application, which could decide whether to call back. For

example, for security reasons a callback might be allowed only if the

Caller ID number is on an approved list. Check with your Service

Provider for Caller ID availability.

Answering Calls Using the Data Port Only

The Data port uses both the RI and DTR signals. How the call

is answered depends on whether DTR is high or low:

•

DP_DTR high (asserted) — the modem will auto-answer.

DP_DTR low (de-asserted) — the modem will not

auto-answer, but your DTE application can decide

whether to answer the call by raising DP_DTR. On an

incoming call, the modem asserts RI and displays RING

to the appropriate port (Data port in this case).

Normally, if the application is using the Data port only and

DP_DTR is low, the modem would be powered off. To power

on the modem while still leaving DP_DTR low to prevent

auto-answering, you can wire the DTR pin high on the

Diagnostic port, instead of on the Data port.

The scenario could work like this:

•

DMP_DTR is high (asserted), powering the modem on.

RI on the Data port asserts.

DP_DTR is low (de-asserted), meaning the modem will

not auto-answer.

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Developing Modem Applications

•

Your DTE application decides to answer the call by

asserting DP_DTR.

Different operating systems handle the DTR-DCD

handshake differently. To configure it appropriately, you can

use the AT&Dand AT&Ccommands.

For more information, see DTE Data Terminal Ready

Behavior (&D) on page 6-16 and DCE Received Line Signal

Detector Behavior (&C) on page 6-16.

Answering Calls Using the Data and Control Ports

If your DTE application is using both the Data and Control

ports, how the call is answered depends on whether DTR is

high (asserted) or low (de-asserted) on the two ports:

•

DP_DTR asserted — the modem will auto-answer.

DP_DTR de-asserted but CP_DTR asserted — the modem

will not auto-answer, but your DTE application can

decide whether to monitor RI and answer calls by raising

DP_DTR. On an incoming call, the modem asserts RI on

the Data port and displays RING to the Control port.

In this scenario, keeping DTR high on the Control port

powers the modem, while allowing you to leave DP_DTR low

to prevent auto-answering.

Roaming and Packet Data Service

The GSP-1620 modem is capable of both “fixed” operation in

one location (for example, a building, tank, pipeline, or well)

or “mobile” operation for applications on trucks, rail cars,

aircraft, or shipping containers.

For packet data service, roaming operation has the following

characteristics:

•

Roaming within a Gateway service area can keep the PPP

session up the entire time, using dormant mode.

•

Roaming between Gateway service areas is supported.

However, there is no hard hand-off capability between

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Integrator’s Reference Manual

separate Gateways. The PPP session will be dropped and

will have to be reestablished by the modem.

•

Once on a new Gateway, automatic re-registration will be

performed and a new dynamic IP address will be assigned

to the modem.

Roaming support for “fixed” IP addressing outside the

“home” Gateway service area is not currently supported.

Future design work to allow a DNS server to map IP

addresses to IMSIs is envisioned, which would permit

worldwide fixed IP address roaming.

If service alerts are enabled, a service alert is sent out the

Data/Control port whenever the Service Provider or Gateway

changes. This includes the modem changing from roaming to

home service area and vice versa.

Using Asynchronous Data

The GSP-1620 modem lets the application device (DTE)

connected to the modem originate or receive an asynchronous

data call. It can dial or be dialed by a modem at the host

server, connecting through the Globalstar Satellite

Communications System and the PSTN.

Figure 5-3 shows the various modems (the GSP-1620 DCE

modem, the Gateway IWF modem, and the host modem) and

other components involved in an asynchronous data call.

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Developing Modem Applications

Figure 5-3. Asynchronous Data Call Components

Satellite

Outdoor Antenna

Globalstar

Gateway

Gateway IWF Modem

GSP-1620

Modem

DCE

PSTN

Interface Port

Control Port

(modem AT commands)

Data Port

(Data or AT commands)

Host Modem

(or modem bank)

SCADA Terminal

Host

Server

(running your

DTE

application software)

(HOST end)

(REMOTE end)

Like most modems, the GSP-1620 modem allows you to

customize asynchronous data connections, data compression,

and so on. For details, see Chapter 6, AT Command Reference.

For a comparison of asynchronous and packet data, see Table 5-1 on

page 5-4. For information about packet data service, see Using Packet

Data on page 5-21.

Note

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Integrator’s Reference Manual

Data Rate and Throughput

For asynchronous data, the GSP-1620 modem offers full

duplex transmit and receive at a Data port rate of somewhat

less than packet data’s 9600 bps, due to additional overhead

for asynchronous data. Similarly, the measured effective

“user” throughput (that is, customer data) is somewhat less

than the 7400 bps (average) for packet data. Asynchronous

connections take longer because of PSTN modem training

time.

QUALCOMM Globalstar packet data service has a lower overhead and

faster connection time than asynchronous data does. If your SCADA

application does not specifically need asynchronous data, use packet

data instead.

Tip

Mobile-Originated Asynchronous Data Calls

The GSP-1620 modem lets the application device (DTE)

connected to it originate an asynchronous data call.

TO MAKE A MOBILE-ORIGINATED ASYNCHRONOUS DATA CALL

Steps

■

Use the ATD<dial string> command.

The modem returns CONNECTif the call has been

established (for other result codes, see Dial (D) on page

6-20).

TO HANG UP AN ASYNCHRONOUS DATA CALL

Steps

1. Enter Online-Command mode by using the in-band

control data escape sequence, “+++” surrounded by guard

time (for details, see Change from Online to

Online-Command Mode (+++) on page 6-40).

2. Use the ATHcommand.

The ATH777command, which hangs up a packet data call and leaves

dormant mode active, will also hang up an asynchronous data call.

Note

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Developing Modem Applications

You can also hang up an asynchronous data call by de-asserting DTR.

However, if DTR is high on only one port and you then de-assert it, the

modem will begin its shutdown sequence.

Note

Mobile-Terminated Asynchronous Data Calls

The GSP-1620 modem lets the application device (DTE)

connected to it receive an asynchronous data call. It is the

responsibility of the DTE application to keep the modem

powered up if it is to receive incoming asynchronous data

calls.

Here is what happens during a mobile-terminated

asynchronous call:

•

The host server directs a host modem to call the

GSP-1620 modem (DCE), using the Dial Number (DN)

assigned to the GSP-1620 modem by the Service Provider.

•

The incoming call toggles RI and displays RING to the

appropriate port.

The ATAcommand tells the GSP-1620 modem (DCE) to

answer an incoming call (for details, see Answer Incoming

Call (A) on page 6-18; also see Automatic Answer (S0) on

page 6-25).

•

How the modem answers the call depends on how the

ports are configured. Port behavior for incoming

asynchronous calls is the same as for packet calls. For

details, see Answering Calls Using the Data Port Only on

page 5-28 and Answering Calls Using the Data and

Control Ports on page 5-29.

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Integrator’s Reference Manual

Accessing Packet Data Over an Asynchronous Connection

Once an asynchronous connection has been established for

the GSP-1620 modem, it could be used to access packet data

(using protocols such as PPP or SLIP).

If PPP is used on top of asynchronous data service, the DTE

would be assigned an IP address. PPP would be required for

Internet access using asynchronous data.

Protocols such as Z-modem or Y-modem or other proprietary

protocols could be used to transfer data between the

GSP-1620 modem and the host modem, without negotiating

PPP.

If your SCADA application requires packet data over an

asynchronous connection, here are some implementation

suggestions:

•

For PPP data, contact your Service Provider to obtain

necessary account information (whatever you would

normally need for an Internet connection, such as an IP

address, DNS information, and so on).

•

Set up the asynchronous connections for the GSP-1620

modem as described in Using Asynchronous Data on page

5-30.

Use the AT$QCPKNDcommand with a value of 2, to allow

mixing packet data calls and asynchronous data calls (for

details, see Packet No Dial ($QCPKND) on page 6-50).

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Developing Modem Applications

Roaming and Asynchronous Data Service

The GSP-1620 modem is capable of both “fixed” operation in

one location (for example, a building, tank, pipeline, or well)

or “mobile” operation for applications on trucks, rail cars,

aircraft, or shipping containers.

For asynchronous or “dialed” data service, roaming operation

has the following characteristics:

•

A host server can call the asynchronous Dial Number and

reach the modem, regardless of which Gateway service

area it is currently located in (just as voice GSP-1600

Tri-Mode Phones can roam and be reached in any

Gateway service area).

•

Roaming within a Gateway service area is supported for

both mobile-originated and mobile-terminated

asynchronous data calls.

Roaming between Gateway service areas is supported;

however, if the modem is in a call when it reaches the

edge of a service area, the call will be dropped and must

be re-established on the new Gateway.

•

Once on a new Gateway, automatic re-registration will be

performed and a new data call can be established.

Fixed (or dynamic) IP addresses are not required for

asynchronous data service as they are for packet data

service.

If service alerts are enabled, a service alert is sent out the

Data/Control port whenever the Service Provider or Gateway

changes. This includes the modem changing from roaming to

home service area and vice versa.

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Integrator’s Reference Manual

Typical Modem Initialization Strings

Table 5-5 summarizes some typical GSP-1620 modem

initialization strings discussed in this chapter and Chapter 4.

For complete details about these and other initialization

strings, see Chapter 6, AT Command Reference.

Table 5-5. Sample Typical Modem Initialization Strings

To do this...

Send these

commands or strings

Where to find more

information

Default all modem settings

ATZ

Reset to Default

Configuration (Z) on page

6-15

Make a packet data call

ATD#777

Dial (D) on page 6-20

Make an asynchronous data

call

ATD<phone number>

Dial (D) on page 6-20

Make a Markov test call

Make a Loopback test call

ATD#627568

ATD#56672225

ATH

Dial (D) on page 6-20

Hang up a packet data call

and end dormant mode; or

hang up an asynchronous

data call

Hook Control (H) on page 6-22

Hang up a packet data call

but leave dormant mode

active; or hang up an

ATH777

Hook Control (H) on page 6-22

asynchronous data call

Check modem status

AT$QCSTATUS

ServiceStatus($QCSTATUS)

on page 6-62

(Globalstar service, signal

strength, registration,

current call state and so on)

Set up dormant mode (with a AT&C0

DCE Received Line Signal

Detector Behavior (&C) on

page 6-16; Set Dormant Mode

Timeout Value (+CTA) on

page 6-49

20-second timeout value)

AT+CTA=20

Enable SMS Alerting

Read SMS messages

AT$QCSMSA

AT$QCSMSP

SMS Alert ($QCSMSA) on

page 6-57

SMS Print ($QCSMSP) on

page 6-52

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Developing Modem Applications

Table 5-5. Sample Typical Modem Initialization Strings

(continued)

To do this...

Send these

commands or strings

Where to find more

information

Enter Online-Command

Mode while a data call is

progress on the Data port,

then re-enter Online mode

+++(surrounded by

guard time)

ATO

Change from Online to

Online-Command Mode(+++)

on page 6-40; Return to

Online Data Mode (O) on page

6-23

Enable Globalstar service

alerts

AT$QCSA

Service Alert ($QCSA) on

page 6-61

Get current position of the

modem

AT$QCPLS

AT$QCPKND=2

Position Location Service

($QCPLS) on page 6-66

Allow the modem to mix

packet and asynchronous

data calls, by handling

packets based on the previous

dialed data call type

Packet No Dial ($QCPKND)

on page 6-50

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AT COMMAND REFERENCE

This chapter provides complete details about the AT

command set for the QUALCOMM Globalstar GSP-1620

Satellite Data Modem. The AT command set is the control

interface between the Data Terminal Equipment (DTE) and

Data Communications Equipment (DCE).

For a handy quick reference to all AT commands, see the

tables at the beginning of this chapter:

•

Table 6-1, “Operational AT Commands” — lists the AT

Commands recognized by the modem software.

•

Table 6-2, “Non-Operational AT Commands” — lists

commands that are recognized, but not supported, by the

modem. For example, because the modem has no speaker,

the command to set speaker volume will neither set the

volume nor return an ERROR. The command is accepted,

but performs no action.

Reference sections in this chapter contain complete details for

each AT command, organized into the following groups:

•

Basic AT Commands (page 6-8)

Basic Action Commands (page 6-18)

Basic S-Registers (page 6-24)

Globalstar-Specific S-Register Extensions (page 6-31)

Extended Configuration AT Commands (page 6-32)

Online-Command Mode Commands (page 6-40)

Dormant Mode Commands (page 6-48)

SMS Commands (page 6-51)

Error Log Services Commands (page 6-59)

Service Status Commands (page 6-61)

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•

Special Calls and Services Commands (page 6-64)

Protocol Stack Modification Commands (page 6-70)

For details about AT commands supported by the GSP-1600 Tri-Mode

Phone, see the QUALCOMM Globalstar Data User Guide (80-99126-1).

Note

AT Command Quick Reference Tables

For many commands listed in Table 6-1 and Table 6-2, the

entries for “Value Range,” “No Value Definition,” or

“Power-On/Reset Default” have no valid value. These entries

have different symbols in place of values:

•

A dash “-” character means that, for this command, the

value is either not present or not allowed.

•

A caret “^” character means that no current value state

(or Power-On state) is kept internally.

•

An asterisk “*” character means you should consult a

footnote for this entry.

Table 6-1. Operational AT Commands

AT Command

Brief Description

Value

Range

No Value

Definition On/

Reset

Power-

(reference page)

Default

Echo OFF|ON (p. 6-9)

[0-1]

[0-2]

Request Identification

Information (p. 6-9)

Result Code Suppression

(p. 6-12)

[0-1]

[0-4]

DCE Response Format

(p. 6-13)

Result Code Selection

Command (p. 6-14)

Reset Default Configuration

(p. 6-15)

DCE RLSD (DCD) Behavior

(p. 6-16)

[0-2]

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AT Command Reference

Table 6-1. Operational AT Commands (continued)

AT Command

Brief Description

(reference page)

Value

Range

No Value

Definition On/

Reset

Power-

Default

DTE DTR Behavior (p. 6-16)

[0-2]

Set to QUALCOMM-Defined

Default Configuration (p. 6-17)

Answer Command (p. 6-18)

Repeat Last Command

(p. 6-19)

Dial (p. 6-20)

Hook Control (p. 6-22)

(0, 777)

Return to Online State

(p. 6-23)

S10

S11

Auto Answer Ring Count

(0 disables) (p. 6-25)

[0-255]

[0-127]

[2-10]

Command Line Termination

Character (p. 6-25)

Response Format Character

(p. 6-26)

Command Edit Character

(p. 6-27)

Pause Before Blind Dialing

Time (p. 6-27)

Connection Completion

Timeout (p. 6-28)

[1-255]

[0-255]

[1-255]

[50-255]

Comma Dial Modifier Time

(p. 6-29)

Carrier Detect Threshold

Timeout (p. 6-29)

Carrier Loss to Disconnect

Timeout (p. 6-30)

DTMF Tone Duration and

Spacing (p. 6-31)

S777

Silent Retry Timeout (p. 6-31)

[0-255]

[1-2]

150

+CMUX

Set Forward MUX Option

(p. 6-32)

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Table 6-1. Operational AT Commands (continued)

AT Command

Brief Description

(reference page)

Value

Range

No Value

Definition On/

Reset

Power-

Default

+CRM

Rm Interface Protocol Setting

(p. 6-33)

[0-1]

+GSN

+ICF

Read phone ESN (p. 6-34)

Character Framing Settings

(p. 6-35)

[(3-3), (0-3)]

3, 3

+IFC

+IPR

Local Flow Control Settings

(p. 6-36)

[(0-3), (0-2)]

2, 2

Rm Interface Baud Rate

Setting (p. 6-38)

(300,

1200,

2400,

4800,

9600,

19200,

38400,

57600,

115200)

~+++~

Direct the DCE to change from

online to online-command

mode (p. 6-40)

+CFG

+DS

Set Remote Config String

Command (p. 6-41)

IWF (Interworking Function)

Data Compression Control

(p. 6-42)

([0-3], [0-1],

[512-

65535],

[6-250])

3, 0, 2048,

3, 0,

2048, 6

+ES

IWF Error Control Selection

(p. 6-45)

([0-4], [0-4],

[0-6])

3, 0, 2

+MS

IWF Modulation Selection

(p. 6-47)

+CTA

Dormant Mode Timeout

Setting (p. 6-49)

[10-255]

[0-2]

$QCPKND

$QCSMSM

Set Packet Data Reconnect

Methods (p. 6-50)

SMS list traversal and

manipulation (p. 6-51)

([0-3],

[0-1])

0,0

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AT Command Reference

Table 6-1. Operational AT Commands (continued)

AT Command

Brief Description

(reference page)

Value

Range

No Value

Definition On/

Reset

Power-

Default

$QCSMSP

Print formatted information

for current SMS message

(p. 6-52)

[0-1]

$QCSMSL

$QCSMSA

$QCSMSI

$QCERR

Lock current SMS message

(p. 6-56)

[0-1]

Set Alert on new SMS message

arrival (p. 6-57)

[0-1]

Send SMS message count

information to DTE (p. 6-58)

Send formatted Error Log

information to DTE (p. 6-59)

$QCCLR

$QCSA

Clear Error Log (p. 6-60)

Set Alert on Service change

(p. 6-61)

[0-1]

$QCSTATUS

$QCTOD

Send formatted Service Status

to DTE (p. 6-62)

Send formatted Time-of-Day to

DTE (p. 6-64)

[0-1]

$QCPLS

Send formatted Position

information to DTE (p. 6-66)

([0-1],

[0-1])

0,0

$QCMSTATS

$QCMODE

Send formatted Markov

statistics to DTE (p. 6-68)

Set Mode: Auto, Globalstar

(p. 6-69)

[1-4]

$QCTCP

TCP Stack Changes

(p. 6-70)

([0-1]

[0-1500]

536

500

6000

100

6000

[0-1500]

[0-120000]

[0-1000]

[0-6000]

[0, 1-100])

$QCVJ

Use Van Jacobsen Header

Compression (p. 6-73)

[0-1]

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Notes for Table 6-1

The A/command is a special function that does not require the S3

command terminator character and causes the execution of the

previously entered AT command.

See the Dcommand description for details on parameters.

When no parameter value is sent with the +IPRcommand, the

Data port default baud rate of 38400 is assumed.

The default baud rate is set with the +IPRcommand itself. When

the modem is power-cycled, the Data port baud rate is reset to its

power-up baud rate stored in non-volatile memory.

The ~character represents “guard-time” before and after the +++

escape sequence.

This parameter is a quoted string, saved in the modem and

downloaded to the Gateway Interworking Function modem when

establishing an asynchronous data call.

The modem will always power-on into Auto mode.

This is an advanced AT command. Do not use it if you do not

understand what it does.

If <tcpmod>is equal to one, the values in the rest of the variables

are put into effect. If <tcpmod>is set to zero, the rest of the values

entered into the AT command are ignored, and the default values are

restored to the internal variables.

Table 6-2. Non-Operational AT Commands

AT Command Brief Description

(reference page)

Value

Range

No Value

Definition On/

Reset

Power-

Defaul

Monitor Speaker Loudness (p. 6-10)

[0-3]

Monitor Speaker Mode (p. 6-11)

Select Pulse Dialing (p. 6-11)

Select Tone Dialing (p. 6-13)

[0-2]

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AT Command Reference

AT Commands Overview

Command Alphabet

The ASCII character set is the alphabet used for the AT

command set. Only the low order seven bits of each character

are considered significant.

Case Sensitivity

Although AT commands are specified in uppercase

throughout this Integrator’s Reference Manual, both

uppercase and lowercase are valid. The modem does not

distinguish between uppercase and lowercase letters.

Command Line Format

AT command lines are made up of three parts: the prefix, the

body, and the termination character.

The command line prefix consists of the letters AT. The

command line prefix is followed by the body, which consists of

one or more AT commands. Command syntax for each specific

AT command within the body is as specified in this document,

for example, Eor $QCSTATUS.

Space characters can be used freely within the body for

formatting purposes. Command lines are terminated with the

termination character specified by S-register S3(see

Command Line Termination Character (S3) on page 6-25).

The default value of S3is the carriage return character <CR>

(ASCII value of 13 decimal).

You can use an alternate command line prefix, which causes

the previously entered command line (body and terminator)

to be executed. This command line prefix consists of the

letters A/.

No terminator is required after entering the /character to begin

command line execution.

Note

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Command Syntax

For AT command syntax in this chapter, the following

definitions apply:

•

Words enclosed in <angle brackets>identify parameters

that can be specified as part of the command.

Syntactical elements enclosed in [square brackets]are

optional and may be omitted from the command line.

Syntactical elements enclosed in {brackets}are required

and must be specified as part of the command.

The use of |between syntactical elements indicates that

only one of the elements may be specified as part of the

command. For example, the command syntax for

S3{=<value>|?}must be either S3=<value>or S3?.

•

The +and $characters are used to identify extended AT

commands. +and $denote standard and

manufacturer-specific extended commands respectively.

A semicolon (;) is used to concatenate additional

commands (basic or extended) after an extended

command.

Basic AT Commands

This section defines the basic AT commands that the

GSP-1620 modem currently supports and the functionality

provided by each. For all basic AT commands that require a

<value>parameter, if <value>is not present then a 0is

assumed by the receiver.

The basic AT commands described in this section return one

of two possible result codes, which are listed in Table 6-3. Any

commands with exceptions to this have separate result code

tables in their sections.

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AT Command Reference

Results Returned

Table 6-3. Result Codes for Basic AT Parameter Commands

Result Code

Condition

The command was correctly recognized and

processed with any required <value>being

set.

ERROR

The command was unrecognized, the <value>

parameter was out of range, or some syntactical

error was encountered.

Command Echo (E)

Syntax

E[<value>]

Description

Determines whether or not the DCE echoes characters

received from the DTE during the Command and

Online-Command modes.

Valid Values

DCE does not echo characters.

DCE echoes characters.

Power-On/Reset Default Value(s)

Results Returned

OKor ERROR; see Table 6-3 on page 6-9 for details.

Get Info (I)

Syntax

I[<value>]

Description

This read-only command returns three different

manufacturer information strings, depending on the <value>

of the parameter sent.

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Valid Values

MODEL NUMBER: 205

MODEL: GSP-1620 Satellite Data Modem

BUILD: <associated software build string

(version information)>

Power-On/Reset Default Value(s)

None.

Results Returned

OKor ERROR; see Table 6-3 on page 6-9 for details.

Monitor Speaker Loudness (L)

Syntax

L[<value>]

Description

Controls the DCE speaker loudness. The modem has no

concept of a monitor speaker. Therefore, this command is

recognized, but does nothing.

Valid Values

Lowest speaker volume

Low speaker volume

Medium speaker volume

High speaker volume

Power-On/Reset Default Value(s)

None.

Results Returned

OKor ERROR; see Table 6-3 on page 6-9 for details.

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AT Command Reference

Monitor Speaker Mode (M)

Syntax

M[<value>]

Description

Controls when the DCE speaker is on. The modem has no

concept of a monitor speaker. Therefore, this command is

recognized but does nothing.

Values

Speaker is always off and never turned on.

Speaker on until carrier has been detected.

Speaker is always on when OFF-Hook.

Power-On/Reset Default Value(s)

None.

Results Returned

OK or ERROR; see Table 6-3 on page 6-9 for details.

Select Pulse Dialing (P)

Syntax

Description

Causes subsequent dialed digits to be signaled using pulse

dialing. This command is recognized but does nothing.

Valid Values

None.

Power-On/Reset Default Value(s)

None.

Results Returned

OKor ERROR; see Table 6-3 on page 6-9 for details.

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Result Code Suppression (Q)

Syntax

Q[<value>]

Description

Determines whether or not result codes are transmitted from

the modem (DCE) to the DTE. When result codes are

suppressed, no result is transmitted to the DTE.

Because the modem depends on the CONNECTresult code returned by

the Gateway IWF (for asynchronous data calls), this command is not

transmitted as part of the remote configuration.

Note

Valid Values

DTE transmits result codes.

Result codes are suppressed and not transmitted.

Power-On/Reset Default Value(s)

Results Returned

Result Code

Condition

The command was correctly recognized and

processed with any required <value>being

set.

ERROR

The command was unrecognized, the <value>

parameter was out of range or some syntactical

error was encountered.

(none)

No result codes are transmitted when <value>

is set to 1.

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AT Command Reference

Select Tone Dialing (T)

Syntax

Description

Causes subsequent dialed digits to be signaled using DTMF

tones. This command is recognized but does nothing.

Valid Values

None.

Power-On/Reset Default Value(s)

None.

Results Returned

OKor ERROR; see Table 6-3 on page 6-9 for details.

DCE Response Format (V)

Syntax

V[<value>]

Description

Determines the contents of the DCE header and trailer

transmitted to the DTE with result codes and information

responses. It also determines whether result codes are

transmitted in numeric or alphabetic format. The text portion

of information responses is not affected by the setting of this

parameter.

The following table shows the effect of setting this parameter

on the format of information text and result codes. The values

<S3>and <S4>represent the ASCII value of the S3and S4

registers respectively.

Information <text><S3><S4>

Responses

Result Codes <numeric

<S3><S4><verbose

code><S3><S4>

code><S3>

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Values

DCE transmits limited headers and trailers and

numeric result codes.

DCE transmits full headers and trailers and

alphabetic result codes.

Power-On/Reset Default Value(s)

Results Returned

OKor ERROR; see Table 6-3 on page 6-9 for details.

Result Code Selection Command (X)

Syntax

X[<value>]

Description

Determines whether or not the DCE transmits particular

result codes to the DTE when connecting asynchronous data

services. This command is recognized but does nothing

locally. Normally it controls whether or not the DCE verifies

the presence of dial tone and/or busy signal on the line.

However, it is used only to allow a non-default value to be

sent to the Gateway IWF modem.

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AT Command Reference

Values

CONNECT result code is given upon entering online data

state. Dial tone and busy detection are disabled.

CONNECT <text> result code is given upon entering

online data state. Dial tone and busy detection are

disabled.

CONNECT <text> result code is given upon entering

online data state. Dial tone detection is enabled, and busy

detection is disabled.

CONNECT <text> result code is given upon entering

online data state. Dial tone detection is disabled, and

busy detection is enabled.

CONNECT <text> result code is given upon entering

online data state. Dial tone and busy detection are both

enabled.

In result codes, <text>is defined by the modem hardware and is not

user-specifiable.

Note

Missing Parameter Default Value(s)

Power-On/Reset Default Value(s)

Results Returned

OKor ERROR; see Table 6-3 on page 6-9 for details.

Reset to Default Configuration (Z)

Syntax

Z[<value>]

Description

Sets all modem (DCE) parameters to their factory defaults,

except the Rm interface baud rate (set via the +IPRcommand)

and the modem call mode (set via the $QCMODEcommand).

Factory defaults are specified by QUALCOMM.

If the modem is in Online mode, the data call is terminated

and the modem returns to Command mode. See Set to

Factory-Defined Configuration (&F) on page 6-17 for more

details on resetting the default baud rate and mode.

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Values

Resets parameters to their factory defaults.

Power-On/Reset Default Value(s)

None.

Results Returned

OKor ERROR; see Table 6-3 on page 6-9 for details.

DCE Received Line Signal Detector Behavior (&C)

Syntax

&C[<value>]

Description

Defines how the DCE controls RLSD (circuit 109) in relation

to detection of the received line signal from the far end.

Valid Values

DCE always places RLSD in ON state.

DCE places RLSD in ON state when connection is

active and places in OFF state otherwise.

DCE winks RLSD by briefly placing RLSD in the

OFF state and then back ON when a data call ends.

This is a QUALCOMM-specific value.

Power-On/Reset Default Value(s)

Results Returned

OKor ERROR; see Table 6-3 on page 6-9 for details.

DTE Data Terminal Ready Behavior (&D)

Syntax

&D[<value>]

Description

Defines how the modem (DCE) responds when the DTE

changes DTR (circuit 108/2) from ON to OFF state when a

connection is active.

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AT Command Reference

Valid Values

DCE ignores DTR state.

DCE transitions to from Online to Online-Command

mode when DTR transitions from ON-to-OFF.

DCE closes connection (terminates call) when DTR

transitions from ON-to-OFF.

Power-On/Reset Default Value(s)

Results Returned

OKor ERROR; see Table 6-3 on page 6-9 for details.

Set to Factory-Defined Configuration (&F)

Syntax

&F[<value>]

Description

Instructs the modem (DCE) to set all parameters to their

QUALCOMM-defined defaults. This command performs the

same operation independent of whether or not <value>is

specified. QUALCOMM-defined defaults are the default

values for each AT command specified in this chapter.

This command sets the modem baud rate to its

power-on/reset default value (see Set Rm Interface Command

Baud Rate (+IPR) on page 6-38), but does not reset the

$QCMODEvalue to its power-on/reset value. (Compare the

behavior of the Zcommand, Reset to Default Configuration (Z)

on page 6-15.)

If the modem is in Online-Command mode, the data call is

released and the modem returns to Command mode.

Valid Values

Resets modem parameters, except <call mode>

(set via $QCMODE), to their default values.

Power-On/Reset Default Value(s)

None.

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Results Returned

OKor ERROR; see Table 6-3 on page 6-9 for details.

Basic Action Commands

This section defines the basic AT action commands for the

modem and the functionality provided by each.

Answer Incoming Call (A)

Syntax

Description

Instructs the GSP-1620 modem (DCE) to answer an incoming

asynchronous data call. The modem establishes a connection

with the Gateway IWF modem, transmits appropriate

configuration data to the Gateway IWF modem, sends the A

command to the Gateway IWF modem, telling it to connect to

the host modem, and waits for the CONNECT(or other) result

code.

Any additional commands that appear after the Acommand on the

same command line are ignored.

Note

This command can be aborted by DCE reception of any character on

the Rm interface. The command is aborted only if the DCE receives the

character prior to establishing the connection and sending the CONNECT

result code.

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AT Command Reference

Results Returned

Result Code

Description

Command is aborted either by reception of an

additional character from the DTE or by the

DTE turning off DTR (circuit 108) for &D1and

&D2.

Also returned if there is no incoming call to

answer.

CONNECT

Connection is successfully established (call is

active on traffic channel). This result code is

transmitted when the DCD (circuit 109) is

turned on.

NO CARRIER

ERROR

The connection could not be established; service

not activated, call cannot be completed, or

service unavailable.

Command was issued in Online-Command

mode.

Repeat Last Command (A/)

Syntax

Description

Although this is technically an AT command prefix and not

an AT command, it is listed in the command section for easy

reference.

This prefix repeats execution of the last command line

entered. If no command was entered previous to entering this

command, the previous command line is considered to be

empty and no action is taken.

Previous command line execution begins immediately after /is

entered. It is not necessary to enter a termination character (carriage

return; see Command Line Termination Character (S3) on page 6-25 for

details) to begin execution of the previous command line body.

Note

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Results Returned

Result Code

Condition

Previous command line is empty.

Previous command line is not empty.

Result from

re-execution of

the previous

command line.

Dial (D)

Syntax

D<dial string>

Description

Originates a call if the dial string is valid.

This command can be aborted by DCE reception of any character on

the Rm interface. This command is aborted only if the DCE receives the

character prior to establishing the connection and sending the CONNECT

result code. The dial command can also be aborted by setting the DTR

line from active to inactive when &D2is set.

Note

Valid Dial Strings

The dial string must be made up of valid dial string

characters and dial modifiers. Valid dial string characters

are:

#*0123456789ABCD

Valid dial string modifiers are

W,!@$TP

Valid dial string modifiers may be included in the dial string,

although they will be ignored. Any other characters within

the dial string that are not recognized as dial string

characters or dial string modifiers by the DCE will be ignored.

This allows characters such as hyphens and parentheses to be

used in the dial string for phone number formatting purposes.

The modem supports packet data, asynchronous data,

Markov, and Loopback calls. If the dial string contains one of

the dial numbers listed below in Dial String Values, a packet

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AT Command Reference

data, Markov, or Loopback call is initiated. All other valid

dial numbers, except dial numbers 1-99, initiate an

asynchronous data call and return the result code of the

Gateway IWF modem.

Dial numbers 1-99 correspond to phone book entries and are

translated into dial numbers stored in the specified location.

If the specified phone book location is unused, no call is

attempted and NO DIALTONE is returned. If the phone book

entry exists, a call is attempted using the dial number stored.

Valid phone book entries include the Dial String Values listed

below.

If ATDis entered by itself, then the modem attempts to call the

previously called number (from the call history) if one exists.

Dial string modifiers and unrecognized characters included

in this dial string are ignored as stated above.

Dial String Values

#777

Originate a packet data call.

Originate a Markov call.

Originate a Loopback call.

#627568

#56672225

Results Returned

Result Codes

CONNECT

Description

Connection is successfully established (call is

active on traffic channel).

NO CARRIER

NO DIALTONE

Service not activated — call cannot be

completed, service unavailable, or user has

released dial command.

Service not available — modem is not

configured for service. Also returned if a

mobile-terminated call (which sends

unsolicited result code RINGto the DTE) is

answered with a D<dial string>command.

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Result Codes

Description

BUSY

The modem is currently on traffic and cannot

originate a call, the called party is busy, or the

IWF returned busy.

NO ANSWER

ERROR

Returned only if the IWF modem (for

asynchronous data calls) returns NO

ANSWER.

Invalid dial string received or a packet data call

is already active.

Hook Control (H)

Syntax

H[<value>]

Description

Controls the “Hook State” of the modem. Going “ON-Hook”

(H, H0or H777) while in Online-Command mode is used to

terminate an active data or test call. The “OFF-Hook” state is

not recognized by the modem, so H1returns an ERRORresult

code.

The data call can be terminated in two ways: either in

Online-Command mode using the Hcommand, or in Online

mode when the DTE sets its DTR line (circuit 108/2) inactive.

The modem must be configured with &D2to allow the DTE to

terminate a packet data call using DTR.

H777is used to release a packet data call and have the Gateway put

the call into dormant mode. Dormant mode is not supported for

asynchronous data calls. Therefore, for an asynchronous call, H777will

return an OKresult code and release the data call, but will not attempt

to go into dormant mode.

Note

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AT Command Reference

Valid Value(s)

Terminates the data call and returns to Command

mode.

777

Terminates the data call as above, but instructs the

Gateway to transition into dormant mode for packet

data calls.

Missing Parameter Default Value(s)

Power-On/Reset Default Value(s)

N/A

Results Returned

See Table 6-3 on page 6-9 for details.

Return to Online Data Mode (O)

Syntax

O[<value>]

Description

Returns the modem to Online mode from Online-Command

mode.

Valid Value(s)

If in Online-Command mode, this command returns

the phone to Online mode. Otherwise, the command

returns NO CARRIERand takes no further action.

Missing Parameter Default Value(s)

Power-On/Reset Default Value(s)

N/A

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Results Returned

Result Code

Condition

CONNECT

The command was correctly recognized and

processed and the transition from

Online-Command to Online mode was

successful.

NO CARRIER

ERROR

The command was correctly recognized and

processed, but the connection was not

successfully resumed.

The command was not recognized, the <value>

parameter was out of range or some syntactical

error was encountered.

Basic S-Registers

This section defines the basic S-registers for the modem and

the functionality provided by each. Table 6-4 lists the result

codes common to all recognized S-register commands.

Results Returned

Table 6-4. Common Result Codes for S-Register Commands

Result

Condition

The <value>sent was recognized and

supported. <value>is now the new value for

the specified S-register.

ERROR

<value>is not recognized. The command is

ignored and the specified S-register is left

unchanged.

<value>

Sx?is used to query S-register x’s current

setting.

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AT Command Reference

Automatic Answer (S0)

Syntax

S0{=<value>|?}

Description

The S0parameter sets the number of rings before the modem

will auto-answer an incoming asynchronous data call.

Valid Value(s)

Automatic answering is disabled.

1-255

Number of rings before an incoming asynchronous

call is automatically answered.

Missing Parameter Default Value(s)

N/A

Power-On/Reset Default Value(s)

Results Returned

See Table 6-4 on page 6-24 for result code details.

Command Line Termination Character (S3)

Syntax

S3{=<value>|?}

Description

Represents the value of the character recognized by the

modem as the command line termination character. When

the modem receives a command line from the DTE, this

character indicates termination of the command line. This

character is also transmitted by the modem to terminate the

result code.

If this value is changed in the command line, the response to

that command line will use the new value.

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Valid Value(s)

0-127

Range of ASCII characters that can be set as the

command termination character

Missing Parameter Default Value(s)

N/A

Power-On/Reset Default Value(s)

Carriage Return character

Results Returned

See Table 6-4 on page 6-24 for result code details.

Response Formatting Character (S4)

Syntax

S4{=<value>|?}

Description

Represents the value of the character transmitted as part of

the response to commands. It is used in formatting the

response and follows the S3character in responses when V1is

in effect.

If this value is changed in the command line, the response to

that command line will use the new value.

Valid Value(s)

0-127

Range of ASCII characters that can be set as the

command result code termination character

Missing Parameter Default Value(s)

N/A

Power-On/Reset Default Value(s)

New Line character

Results Returned

See Table 6-4 on page 6-24 for result code details.

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AT Command Reference

Command Line Editing Character (S5)

Syntax

S5{=<value>|?}

Description

Represents the value of the character recognized by the

modem as the backspace character. When the modem

receives this character, it interprets it as a request to delete

the previous character in the command line currently being

entered.

Valid Value(s)

0-127

Range of ASCII characters that can be set as the line

editing (backspace) character

Missing Parameter Default Value(s)

N/A

Power-On/Reset Default Value(s)

Backspace character

Results Returned

See Table 6-4 on page 6-24 for result code details.

Pause Before Blind Dialing Time (S6)

Syntax

S6{=<value>|?}

Description

Represents the amount of time the DCE waits before dialing

a valid Dial Number.

This parameter is valid only for asynchronous data services.

It is sent to the Gateway IWF modem if different from the

default value but is otherwise not used by the modem.

Valid Value(s)

2-10

Number of seconds to wait before blind dialing

Missing Parameter Default Value(s)

N/A

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Power-On/Reset Default Value(s)

seconds

Results Returned

See Table 6-4 on page 6-24 for result code details.

Connection Completion Timeout (S7)

Syntax

S7{=<value>|?}

Description

Specifies the number of seconds to establish an end-to-end

data connection. The modem will disconnect the line if no

connection is established within this time. See Silent Retry

Timeout (S777) on page 6-31 for similar (Globalstar-specific)

control.

This parameter is valid only for asynchronous data services.

It is sent to the Gateway IWF modem if different from the

default value but is otherwise not used by the modem.

Valid Value(s)

1-255

Number of seconds to establish a connection or call

will be disconnected

Missing Parameter Default Value(s)

N/A

Power-On/Reset Default Value(s)

seconds

Results Returned

See Table 6-4 on page 6-24 for result code details.

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AT Command Reference

Comma Dial Modifier Time (S8)

Syntax

S8{=<value>|?}

Description

Specifies the amount of time, in seconds, that the modem

pauses, during dialing, when a “,” (comma) is encountered in

the dial string.

This parameter is valid only for asynchronous data services.

It is sent to the Gateway IWF modem if different from the

default value but is otherwise not used by the modem.

Valid Value(s)

Disabled. Modem does not pause when “,” is

encountered.

1-255

Number of seconds to pause.

Missing Parameter Default Value(s)

N/A

Power-On/Reset Default Value(s)

seconds

Results Returned

See Table 6-4 on page 6-24 for result code details.

Carrier Detect Threshold Timeout (S9)

Syntax

S9{=<value>|?}

Description

Specifies the amount of time, in 0.1 second increments, that

the modem should wait before dropping DCD after the

signaling carrier is lost.

This parameter is valid only for asynchronous data services.

It is sent to the Gateway IWF modem if different from the

default value but is otherwise not used by the modem.

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Valid Value(s)

Disabled

1-255

Number of tenths of a second delay

Missing Parameter Default Value(s)

N/A

Power-On/Reset Default Value(s)

tenths of a second

Results Returned

See Table 6-4 on page 6-24 for result code details.

Carrier Loss to Disconnect Timeout (S10)

Syntax

S10{=<value>|?}

Description

Specifies the amount of time, in 0.1 second increments, that

the DCE will remain connected before dropping DCD after

the signaling carrier is lost.

This parameter is valid only for asynchronous data services.

It is sent to the Gateway IWF modem if different from the

default value but is otherwise not used by the modem.

Valid Value(s)

1-254

255

Number of tenths of a second to wait

Disable timeout

Missing Parameter Default Value(s)

N/A

Power-On/Reset Default Value(s)

tenths of a second

Results Returned

See Table 6-4 on page 6-24 for result code details.

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AT Command Reference

DTMF Tone Duration and Spacing (S11)

Syntax

S11{=<value>|?}

Description

Specifies the duration and spacing, in milliseconds, of DTMF

tones while dialing a valid number.

This parameter is valid only for asynchronous data services.

It is sent to the Gateway IWF modem if different from the

default value but is otherwise not used by the modem.

Valid Value(s)

50-255

Number of milliseconds of delay

Missing Parameter Default Value(s)

N/A

Power-On/Reset Default Value(s)

milliseconds

Results Returned

See Table 6-4 on page 6-24 for result code details.

Globalstar-Specific S-Register Extensions

This section defines the GSP-1620 modem-specific S-register

extensions for the modem and their functionality.

Silent Retry Timeout (S777)

Syntax

S777{=<value>|?}

Description

Represents the duration of the “call origination silent retry

timer.” This specifies the amount of time (in seconds) the

modem will attempt to originate a call before giving up and

performing reacquisition of the Globalstar system.

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Valid Value(s)

0-255

Silent-Retry timeout in seconds

Missing Parameter Default Value(s)

N/A

Power-On/Reset Default Value(s)

150

seconds

Results Returned

See Table 6-4 on page 6-24 for result code details.

Extended Configuration AT Commands

This section defines the extended AT configuration

commands for the modem and the functionality provided by

each.

Set Forward MUX Option (+CMUX)

Syntax

+CMUX[=<value>|?|=?]

Description

Sets the modem’s multiplex option for packet data calls. The

multiplex option selects the requested rateset for IS-95 calls.

This command affects IS-95 packet data calls only. This

command does not apply to Globalstar mode, which can only

operate at 9600 baud.

+CMUX?queries the current <mux>setting. +CMUX=?queries for

the acceptable range of <value>.

Valid Value(s)

Selects IS-95 rateset 1. This is roughly equivalent to

9600 baud.

Selects IS-95 rateset 2. This is roughly equivalent to

14.4K baud.

Missing Parameter Default Value(s)

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AT Command Reference

Power-On/Reset Default Value(s)

Results Returned

Result

Condition

A valid <value>was received and processed.

ERROR

<value>is not supported.

+CMUX:<value> ?is used to query current setting.

+CMUX: (1-2)

=?is used to query acceptable range of

<value>parameter.

Set Rm Interface Protocol (+CRM)

Syntax

+CRM[=<value>|?|=?]

Description

Sets the Rm interface protocol. When no <value>is specified,

<value>is assumed to be 1.

+CRM?queries for the current setting of the <value>.

+CRM=?queries for the acceptable range of <value>.

Valid Value(s)

Asynchronous Data Services

Packet Data Services

Missing Parameter Default Value(s)

Power-On/Reset Default Value(s)

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Results Returned

Result

Condition

A valid <value>was received and processed.

<value>is not supported.

?is used to query current setting.

ERROR

+CRM:<value>

+CRM: (0-1)

=?is used to query acceptable range of

<value>parameter.

Get Modem User Terminal ESN (+GSN)

Syntax

+GSN[=<value>|?|=?]

Description

This read-only command returns the modem’s ESN only

when the bare command (AT+GSN) is entered. All other legal

syntax forms simply return an OKresult code.

Valid Value(s)

N/A. This parameter is read only.

Missing Parameter Default Value(s)

N/A.

Power-On/Reset Default Value(s)

N/A.

Results Returned

Result

Condition

+GSN:

This is considered the OKresponse for any

legal syntax that does not return the

phone’s ESN.

ERROR

An illegal syntax was entered.

+GSN: <Hex ESN> ESN is all uppercase Hex character with

no 0xprefix, or hor Hsuffix.

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AT Command Reference

Set Character Framing (+ICF)

Syntax

+ICF[=<format>|=[<format>],[<parity>]|?|=?]

Description

Sets the modem local serial port asynchronous character

framing (start/stop bits) used for transmitting and receiving

information between modem and DTE on the Data port of the

Rm interface.

This command has no effect on the configuration of the Control port of

the modem’s Rm interface. The Control port has a fixed configuration of

8 data bits, 1 stop bit and no parity running at 9600 baud.

Note

As shown in the syntax above, either <format>or <parity>

can be optionally specified. If only one value is specified then

the other is left unchanged. If both values are left unspecified

then both are reset to their power-on default values.

Optional parameters must be separated by commas. The

commas act as place holders (in the command parser) for any

missing optional parameters.

+ICF? queries the current setting of <format>and <parity>.

+ICF=?queries for the acceptable ranges of <format>and

<parity>.

Valid Value(s)

<format>:

8 data bits, 1 stop bit and no parity

<parity>:

Even parity

Odd parity

Mark parity

Space parity

Missing Parameter Default Value(s)

See “Description” above for values assumed when optional

parameters are missing.

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Power-On/Reset Default Value(s)

<format> = 3 (for format 3 parity value is ignored)

<parity> = 3 (no parity is actual configuration)

Results Returned

Result

Condition

<format>and/or <parity>are

recognized and supported, and have

been processed correctly.

ERROR

A parameter value was out of range

or a syntax error was encountered.

+ICF: <format>,

?is used to query current setting.

+ICF: (3), (0-3)

=?is used to query acceptable range

of parameters.

Set Local Flow Control (+IFC)

Syntax

+IFC[=<DCE_by_DTE>|=[<DCE_by_DTE>],

[<DTE_by_DCE>]|?|=?]

Description

Controls the operation of local flow control between the

modem (DCE) and DTE:

• <DCE_by_DTE>specifies the method of flow control to be

used by the DTE to control the flow of data from the

modem.

• <DTE_by_DCE>specifies the method of flow control to be

used by the modem to control the flow of data from the

DTE.

This command has no effect on the configuration of the Control port of

the modem’s Rm interface. The Control port’s configuration is fixed with

no flow control.

Note

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AT Command Reference

As shown in the syntax above, either <DCE_by_DTE>or

<DTE_by_DCE>can be optionally specified. If only one value is

specified then the other is left unchanged. If both values are

left unspecified then both are reset to their power-on default

values.

Optional parameters must be separated by commas. The

commas act as place holders (in the command parser) for any

missing optional parameter.

+IFC?queries for the current settings of <DCE_by_DTE>and

<DTE_by_DCE>. +IFC=?queries for the acceptable ranges of

<DCE_by_DTE> and <DTE_by_DCE>.

Valid Value(s)

<DCE_by_DTE>:

No flow control

Software (XON/XOFF) flow control, stripping

XON/XOFF characters from stream

Hardware (RFR/RTS) flow control

Software flow control, no stripping

<DTE_by_DCE>:

No flow control

Software XON/XOFF flow control, stripping

XON/XOFF characters from stream

Hardware (CTS) flow control

Missing Parameter Default Value(s)

See “Description” above for values assumed when optional

parameters are missing.

Power-On/Reset Default Value(s)

<DCE_by_DTE> = 2

<DTE_by_DCE> = 2

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Results Returned

Result

Condition

Parameters are recognized and

supported, and have been processed

correctly.

ERROR

A parameter value was out of range

or a syntax error was encountered.

+IFC:<DCE_by_DTE>,

<DTE_by_DCE>

?is used to query current setting.

+IFC: (0-3),(0-2)

=?is used to query acceptable range

of parameters.

Set Rm Interface Command Baud Rate (+IPR)

Syntax

+IPR[=<rate>|?|=?]

Description

Specifies the baud rate at which the modem communicates

with the DTE over the Data port of the Rm interface (see

Figure 5-2 on page 5-7). If <rate>is not specified, <rate> is

set to the power-on/reset default value. When the modem is

power-cycled, the Data port baud rate is reset to its power-up

baud rate stored in non-volatile memory.

The +IPRcommand does not affect the modem’s call mode (set

by the $QCMODEcommand, as described on page 6-69).

?syntax queries for the current setting of the Data port baud

rate. =?syntax queries for the acceptable range the <rate>

parameter can be set to.

The modem does not support automatic baud rate detection.

Note

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AT Command Reference

Valid Value(s)

<rate>:

300

300 baud (bits/second)

1200 baud

1200

2400

2400 baud

4800

4800 baud

9600

9600 baud

19200

38400

57600

115200

19200 baud

38400 baud

57600 baud

115200 baud

Missing Parameter Default Value(s)

See “Description” above for values assumed when optional

parameters are missing.

Power-On/Reset Default Value(s)

See “Description” above for a discussion of power-on/reset

defaults.

Results Returned

Result

Condition

Parameters are recognized and

supported.

ERROR

Parameters are not recognized or

supported.

+IPR: <baudrate>

?is used to query current setting.

+IPR: ( ), (<baud>

range)

=?is used to query acceptable range

of parameters.

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Online-Command Mode Commands

Online-Command mode allows the Online mode data stream

to be interrupted so that AT commands are recognized and

processed. An escape sequence, injected into the data stream,

directs the modem to enter Online-Command mode from

Online mode.

All AT commands recognized in Command mode are also

recognized in Online-Command mode. The Hcommand and

the Ocommand are of particular use in Online-Command

mode.

When the Control port is active, the +++escape sequence and

the Ocommand return their normal success status, even

though the Control port’s operating mode has not changed

from Command mode.

Change from Online to Online-Command Mode (+++)

Syntax

~+++~

Description

The escape sequence that directs the modem to change from

Online to Online-Command mode. Although this is not an AT

command, it is necessary to support Online-Command mode

and is, therefore, listed here for easy reference.

The ~ character indicates the “guard-time” both before and

after the escape sequence. This “guard-time” is necessary to

differentiate between the escape sequence +++ and any other

string of three +characters inside the Online data stream.

EIA/TIA/IS-707A defines the length of the “guard-time” as

“an appropriate time.” The modem defines the “guard-time”

to be 1 second.

The “+++” string is transmitted through to the host side, even if the

escape sequence is recognized.

Note

Valid Value(s)

N/A.

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Missing Parameter Default Value(s)

N/A.

Power-On/Reset Default Value(s)

N/A.

Results Returned

Result Code

Condition

Escape sequence recognized.

Online-Command mode is active.

None. Continue in Online

mode.

Escape sequence was not

recognized.

Asynchronous Data through Gateway IWF Commands

These commands support asynchronous data connections.

They have no effect locally. They are merely collected locally

and sent to the Gateway IWF for processes at the beginning

of an asynchronous data call.

Set Remote Config String (+CFG)

Syntax

+CFG[=<string>|?]

Description

Sets the remote configuration string sent to the IWF. The

string, up to and including the termination character but

excluding the quote ("") characters, is stored by the modem

and sent to the Gateway IWF prior to connecting an

asynchronous data call (either mobile-originated or

mobile-terminated).

Each transmission of a +CFGcommand from the DTE replaces

the contents of the previous string. The string may be up to

248 characters long.

+CFG?queries the current setting of the config <string>.

+CFG=?is not a valid query and will return an ERROR

result code.

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Valid Value(s)

Any valid combination of AT commands used to configure the

IWF modem of an asynchronous data call.

Missing Parameter Default Value(s)

N/A

Power-On/Reset Default Value(s)

empty string

Results Returned

Result Code

Condition

A valid quoted <string>was

received and processed.

ERROR

Badly formatted <string>or

syntax is not supported.

+CFG: <string>

?is used to query current setting

enclosed in quotes ("").

Data Compression Control Command (+DS)

Syntax

+DS[=[<dir>[,<comp_neg>[,<max_dict>[,<max_string>]]]

]|?|=?]

Description

This extended-format compound parameter controls the

V.42bis data compression function on the PSTN link between

the Gateway IWF and the host modem (if provided in the

IWF). It accepts four numeric subparameters:

<dir>

Specifies the desired direction(s) of operation

of the data compression function from the

DTE point of view.

<comp_neg>

Compression negotiation specifies whether or

not the DCE should continue to operate if the

desired result is not obtained.

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AT Command Reference

<max_dict>

Specifies the maximum number of dictionary

entries which should be negotiated (may be

used by the DTE to limit the codeword size

transmitted, based on its knowledge of the

nature of the data to be transmitted).

<max_string>

Specifies the maximum string length to be

negotiated (V.42bis P2).

As shown in the syntax above, any of <dir>, <comp_neg>,

<max_dict>or <max_str>may be optionally specified. If any

parameter is left unspecified, its value is left unchanged. If all

values are left unspecified then all are reset to their power-on

default values.

Optional parameters must be separated by commas. The

commas act as place holders (in the command parser) for the

missing optional parameter.

+DS?queries for the current parameter value settings.

+DS=?queries for the acceptable parameter ranges.

Valid Value(s)

<dir>:

Negotiated...no compression (V.42bis P0=0)

Transmit only

Receive only

Both directions, accept any direction (V.42bis P0=11)

<comp_neg>:

Do not disconnect if V.42bis is not negotiated by the

remote DCE as specified in <dir>.

Disconnect if V.42bis is not negotiated by the remote

DCE as specified in <dir>.

<max_dict>

512-65535

<max_string>

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Missing Parameter Default Value(s)

See “Description” above for values assumed when optional

parameters are missing.

Power-On/Reset Default Value(s)

<dir>

= 3

<comp_neg>

<max_dict>

<max_string>

= 0

= 2048

= 6

Results Returned

Result Code

Condition

Parameters are recognized and have

been processed correctly.

ERROR

+DS:

<dir>,<comp_neg>,

<max_dict>,

A parameter value was out of range

or a syntax error was encountered.

?is used to query current settings.

<max_string>

+DS: (0-3),(0-1),

(512-65535),(6-250)

=?is used to query acceptable range

of parameters.

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AT Command Reference

Error Control Selection Command (+ES)

Syntax

+ES[=[<orig_rqst>[,<orig_fbk>[,<ans_fbk>]]]|?|=?]

Description

This extended-format compound parameter controls the

manner of operation of the V.42 protocol on the PSTN link

between the Gateway IWF and the host modem (if provided

in the IWF). It accepts three numeric sub-parameters:

<orig_rqst>

<orig_fbk>

<ans_fbk>

Specifies the initial requested mode of

operation when the IWF is operating as the

originator.

Specifies the acceptable fallback mode of

operation when the IWF is operating as the

originator.

Specifies the acceptable fallback mode of

operation when the IWF is operating as the

answerer.

As shown in the syntax above, any of <orig_rqst>,

<orig_fbk>or <ans_fbk>may be optionally specified. If any

parameter is left unspecified, its value is left unchanged. If all

values are left unspecified then all are reset to their power-on

default values.

Optional parameters must be separated by commas. The

commas act as place holders (in the command parser) for the

missing optional parameter.

+ES?queries for the current parameter value settings.

+ES=?queries for the acceptable parameter ranges.

Valid Value(s)

<orig_rqst>:

Direct mode.

Initiate call with Buffered mode only.

Initiate V.42 without Detection Phase. If V.8 is in

use, this is a request to disable V.42 Detection Phase.

Initiate V.42 with Detection Phase.

Initiate Alternative Protocol.

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<orig_fbk>:

Error control optional (either LAPM or Alternative

acceptable); if error control not established, maintain

DTE-DCE data rate and use V.14 buffered mode

with flow control during non-error-control operation.

Error control optional (either LAPM or Alternative

acceptable); if error control not established, change

DTE-DCE data rate to match line rate and use

Direct mode.

Error control required (either LAPM or Alternative

acceptable); if error control not established,

disconnect.

Error control required (only LAPM acceptable); if

error control not established, disconnect.

Error control required (only Alternative protocol

acceptable); if error control not established,

disconnect.

<ans_fbk>:

Direct mode.

Error control disabled, use Buffered mode.

Error control optional (either LAPM or Alternative

acceptable); if error control not established, maintain

DTE-DCE data rate and use local buffering and flow

control during non-error-control operation.

Error control optional (either LAPM or Alternative

acceptable); if error control not established, change

DTE-DCE data rate to match line rate and use

Direct mode.

Error control required (either LAPM or Alternative

acceptable); if error control not established,

disconnect.

Error control required (only LAPM acceptable); if

error control not established, disconnect.

Error control required (only Alternative protocol

acceptable); if error control not established,

disconnect.

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AT Command Reference

Missing Parameter Default Value(s)

See “Description” above for values assumed when optional

parameters are missing.

Power-On/Reset Default Value(s)

<orig_rqst>

<orig_fbk>

<ans_fbk>

= 3

= 0

= 2

Results Returned

Result Code

Condition

Parameters are recognized and have

been processed correctly.

ERROR

A parameter value was out of range

or a syntax error was encountered.

+ES: <orig_rqst>,

<orig_fbk>,

?is used to query current settings.

<ans_fbk>

+ES:

=?is used to query acceptable range

of parameters.

(0-4),(0-4),(0-6)

Modulation Selection Command (+MS)

Syntax

+MS[=[<carrier>[,<automode>[,<min_rate>[,<max_rate>

[,<min_rx_rate>[,<max_rx_rate>]]]]]]|?|=?]

Description

This extended-format compound parameter is used to control

the manner of operation of the of the modulation capabilities

in the IWF (if provided in the IWF). It accepts a single,

user-definable, string parameter that contain the parameters

listed above. This string is sent to the Gateway IWF during

configuration by the modem, but is otherwise not used locally.

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Valid Value(s)

Missing Parameter Default Value(s)

"" empty string

Power-On/Reset Default Value(s)

"" empty string

Results Returned

Result Code

Condition

Parameters are recognized and have

been processed correctly.

ERROR

A parameter value was out of range

or a syntax error was encountered.

+MS: <string>

? is used to query current settings.

Dormant Mode Commands

Dormant mode allows the modem to disconnect the active

data call, to save on over-the-air usage and charges, while

allowing the Gateway to maintain the state of the current

data call (e.g., assigned IP address). This allows for faster

reconnects when more data packets need to be sent or

received.

The dormant mode AT commands are +CTAand $QCPKND. Also

see DCE Received Line Signal Detector Behavior (&C) on page

6-16.

Dormant mode is not available for asynchronous calls.

Note

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AT Command Reference

Set Dormant Mode Timeout Value (+CTA)

Syntax

+CTA[=<timeout>|?|=?]

Description

Sets/tests the number of seconds of inactivity (no incoming or

outgoing PPP data) before the modem times out the active

data call and transitions to dormant mode.

This timeout is only valid while in Online mode of a data call.

While in Online-Command mode, the +CTAidle timer is

disabled. Upon re-entering Online mode the dormant mode

timer is enabled and reset to restart the timeout period.

Valid Value(s)

Dormant mode timeouts are disabled. The Traffic

Channel is not released during inactivity periods.

10-255

Release the Traffic Channel after <timeout>

1-second intervals have elapsed since last sending or

receiving RLP data frames on the Um interface.

Missing Parameter Default Value(s)

Power-On/Reset Default Value(s)

Results Returned

Result

Condition

<timeout>is supported and set

as the dormant mode timeout

period.

ERROR

<timeout>is not supported and

the dormant mode timeout period

is left unchanged.

+CTA: <timeout>

?is used to query current setting.

+CTA: (0, 10-255)

=?is used to query acceptable

range of the <timeout>

parameter.

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Packet No Dial ($QCPKND)

Syntax

$QCPKND[=<mode>|?|=?]

Description

Modifies the behavior of the modem when it receives a data

packet, while not in a data call. This allows the modem to

originate (or not originate) a packet data call upon receipt of

a packet without first receiving a Dial command. This feature

is necessary for modem-reestablished dormant-mode packet

data calls.

Select option 0if you are making only packet data calls. Select

option 2if mixing packet data calls and other types of data

calls (e.g., asynchronous data). If you do not want dormant

mode, select option 1.

Valid Value(s)

Disable Packet No Dial. If a packet is received by the

modem while not in a data call, the modem

originates a packet data call in the current mode,

even though a Dial command was not received.

Enable Packet No Dial. If a packet is received by the

modem while not in a data call, the modem discards

the packet and does nothing.

Selective Packet No Dial. If the last data services call

initiated with the Dial command was a packet data

call, then upon receipt of a packet the modem

originates a packet data call in the current mode. If

the last data services call was NOT a packet data call

(for example it was an asynchronous call), then upon

receipt of a packet the modem discards the packet

and does nothing.

Missing Parameter Default Value(s)

Power-On/Reset Default Value(s)

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AT Command Reference

Results Returned

Result Code

Condition

<mode>is supported and the PPP behavior

is set.

ERROR

<mode>is not supported and the PPP

behavior is left unchanged.

$QCPKND:

<mode>

?is used to query current setting.

$QCPKND: (0-2) =?is used to query acceptable range if the

<mode> parameter

SMS Commands

The following commands access the Short Messaging Services

(SMS) of the modem. SMS messages are stored in the modem

until the user has retrieved and deleted them. They are

presented through this interface as a list, sorted in the order

received. The application can navigate the list and

manipulate the list (print, lock and erase messages) using the

following AT commands.

SMS Move/Delete ($QCSMSM)

Syntax

$QCSMSM[=<move>|=[<move>],[<del>]|=?]

Description

Traverses the list of SMS messages, optionally moving in a

specifiable direction and/or optionally deleting the current

message before the move.

This command takes up to two optional arguments for

movement direction (<move>) and delete current message

before move (<del>). If left unspecified, the <move>is

assumed to be forward with no <del>.

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Values

<move>

Move to the next message in the list.

Move to the previous message in the list.

Move to the top of the list.

Move to the end of the list.

<del>

NO — Do NOT delete current message before

movement.

YES — DO delete current message before

movement.

Default Value(s)

0,0

Move to the next message and do not delete.

Power-On Default

None.

Results Returned

Result Code

Description

The move and/or delete operation was

completed successfully.

ERROR

Incorrect syntax; unsupported <move>or

<del>values; or the move or delete operation

failed.

SMS Print ($QCSMSP)

Syntax

$QCSMSP[=<tformat>]

Description

Sends a formatted, multi-line string representing the

contents of the current SMS message to the DTE. As in the

$QCTODcommand, an optional parameter can specify the

format to be used when displaying the SMS message arrival

time (see Time of Day ($QCTOD) on page 6-64).

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Values

Same as Time-of-Day format ‘0’.

Same as Time-of-Day format ‘1’.

Default Value

Power-On Default

None.

Results Returned

Result Code

Description

<formatted

message>

If a current message exists then it will be

formatted as described below with field

definitions also given.

The format of the message will be:

INDEX:<Hexadecimal index>

NEW:[<YES|NO>]

LOCKED:[<YES|NO>]

NUMBER:[<Call back #>]

TYPE:[<Type>]

PRIORITY:[<priority (4

levels)>]

TIME:[<Time Stamp>]

LENGTH:[<decimal length of

message>]

MESSAGE:[<Message Data>]

Each field of the given format is defined

in Table 6-5, “SMS Print Command

Field Definitions,” on page 6-54. This

format was chosen to avoid confusion

between message text and the OK. The

LENGTHfield specifies the number of

8-bit bytes in the MESSAGEfield.

ERROR

Unrecognized or unsupported syntax; or

there are no messages in the phone.

Format Field Definitions

See Table 6-5.

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Table 6-5. SMS Print Command Field Definitions

Field Name

Description

INDEX:

This field is a unique 32-bit value

(expressed in Hex) given to each SMS

message stored. It allows the SMS

messages to be sorted according to their

arrival time and not their time stamp. See

the TIMEfield for a description of the

issues around time stamps.

NOTE: Although the INDEXfield is unique

for SMS messages currently stored (it is

initialized to a value one greater than the

highest index currently stored), it can be

repeated.

Example: When the highest indexed SMS

message is erased and the phone is

immediately reset, then that index will be

used again.

NEW:

The field indicates whether this message is

a newly arrived (<NEW:YES>) message or

one that has been previously read

(<NEW:NO>). A message is marked read

(<NEW:NO>) after the $QCSMPcommand is

issued.

LOCKED:

This field indicates that the user has set

the LOCKflag of the SMS message (See

SMS Lock ($QCSMSL) on page 6-56 for

details). The LOCKflag prevents a

previously read message (<NEW:NO>) from

being “autodeleted” from internal storage.

Autodeletion is a mechanism by which old

SMS messages are deleted without user

intervention, when the SMS storage

memory is full, to make room for a newly

arrived message.

NOTE: Locked messages (<LOCKED:YES>)

can be manually deleted, by the user,

without first unlocking the message

(<LOCKED:NO>).

NUMBER:

This field is a sender- and application-

specific “call back” phone number.

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AT Command Reference

Table 6-5. SMS Print Command Field Definitions (continued)

Field Name

Description

TYPE:

This field represents the SMS message

type. Possible values are:

SMSI_CPT_95

SMSI_CMT_95

SMSI_VMN_95

SMSI_CMT_91_CLI

SMSI_CMT_91_VOICE_MAIL

SMSI_CMT_91_SHORT_MSG

SMSI_AWI_95

PRIORITY:

TIME:

This field represents the priority of the

received SMS message. The IS-637

standard allows for four (4) levels of

priority; 0 being the lowest and 3 being the

highest.

This field is a time stamp placed on the

SMS message, either by the Message

Center (that sent it) or by the modem (if the

message was received with no time stamp

attached). If the Message Center attached

the time stamp it will represent the time

the message was initially sent. If, however,

the modem attaches the time stamp, it will

represent the time the message was

received (for storage).

Although the IS-637 standard requires the

message center time stamp to be specified

in UTC, it is known that some Service

Providers’ message centers use local time.

Because this condition cannot be detected

and/or corrected automatically, a

user-selectable (per NAM) switch was

implemented to set whether the received

time stamp was adjusted to UTC or not.

NOTE: Whether the time stamp

represents time sent or arrival time is not

stored, and so cannot be determined by the

user.

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Table 6-5. SMS Print Command Field Definitions (continued)

Field Name

Description

LENGTH:

This field is the decimal count of the

number of 8-bit bytes in the SMS message

MESSAGEfield.

MESSAGE

This field is the user data payload sent in

the SMS message. Normally this field is

text data such as a page or e-mail.

However, for purposes of the Data Services

it can contain application-specific binary

data as well.

SMS Lock ($QCSMSL)

Syntax

$QCSMSL[=<lock>]

Description

Lock or unlock (that is, set or clear the LOCKflag of) the

current SMS message. When a message is locked, it will not

be “autodeleted.”

“Autodelete” is a mechanism used to make room for newly

arriving SMS messages, if storage memory is needed, by

erasing OLD (previously read) text messages.

The user may delete locked messages without unlocking them.

Note

Values

Unlock the current message (clear the lock flag).

Lock the current message (set the lock flag).

Default Value

Lock the current message.

Power-On Default

N/A.

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Results Returned

Result Code

Description

The requested operation was successful.

ERROR

If an illegal value is detected or any error

associated with changing the value of the LOCK

flag.

SMS Alert ($QCSMSA)

Syntax

$QCSMSA[=<alert>|?|=?]

Description

This command sets whether the DTE is “alerted” of the

arrival of a new SMS message. This “Alert” takes the form of

sending an unsolicited result code (SMS) out the Rm interface

to the DTE (much the same as a RINGindication for incoming

calls). The destination port for the SMSresult code is the active

AT command port.

Values

Asynchronous messaging will be turned OFF.

Asynchronous messaging will be turned ON.

Default Value

Power-On Default

Results Returned

Result Code

Condition

<alert>is recognized and supported.

<alert>is not supported and ignored.

ERROR

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SMS Info ($QCSMSI)

Syntax

$QCSMSI

Description

Returns the current state of the SMS database. This state

includes the counts of the list storage areas: NEW URGENT, NEW,

OLDand VMN. The VMN count will always be 0 because any

arriving VMN messages will not be stored.

Values

None.

Default Value

None.

Power-On Default

None.

Results Returned

Result Code

Condition

The operation completed successfully (see

below for details on format).

Where <SMS Info>is a series of formatted

lines indicating the current state of the SMS

message database. The format is given below

with field descriptions given in Table 6-6,

“SMS Info Command Field Definitions,” on

page 6-59.

TOTAL:<total saved>

URGENT:<total new urgent>

NEW:<total new>

OLD:<total old>

VMN:<total vmn> (always ’0’)

LOCKED:<total locked>

ERROR

An unrecognized or unsupported syntax was

entered.

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Format Field Definitions

Table 6-6. SMS Info Command Field Definitions

Field Name

Description

TOTAL:

The total number of SMS messages saved

in internal storage.

URGENT:

NEW:

The total number of NEW SMS messages

marked URGENT.

The total number of NEW SMS messages

not marked URGENT.

OLD:

VMN:

The total number of OLD/Read messages.

The total number of VMN messages

(always ‘0’).

LOCKED:

The total number of messages (OLDor NEW)

that have been LOCKED against

“autodelete.”

Error Log Services Commands

Retrieve Error Log ($QCERR)

Syntax

$QCERR

Description

Returns the modem’s error log and build information.

Values

None.

Default Value

None.

Power-On Default

None.

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Results Returned

Result Code

Description

<Error Log

Info>

If the requested operation was performed.

ERROR

An unrecognized syntax was entered.

Clear Error Log ($QCCLR)

Syntax

$QCCLR

Description

Clears the error log.

Values

None.

Default Value

None.

Power-On Default

None.

Results Returned

Result Code

Condition

The Error Log was successfully cleared.

An unrecognized syntax was entered.

ERROR

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Service Status Commands

Service Alert ($QCSA)

Syntax

$QCSA[=<alert>|?|=?]

Description

Turns ON or OFF the unsolicited result code “alerting” the

DTE of service changes. Changes may include items such as

fade, acquisition, roaming, etc. This “Alert” takes the form of

sending an unsolicited result code (SERVICE) out the Rm

interface to the DTE (much the same as a RINGindication for

incoming calls). The destination port for the SMSresult code is

the active AT command port.

Values

Turns OFF service alert.

Turns ON service alert.

Default Value

Power-On Default

Results Returned

Result Code

Condition

<alert>is recognized and supported

ERROR

An unrecognized syntax or an invalid <alert>

value was entered.

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Service Status ($QCSTATUS)

Syntax

$QCSTATUS

Description

Returns the current status of the modem. Information

returned includes whether the modem sees a Gateway, the

signal strength (RSSI), registration status, current call state,

roaming, and so on.

Values

None.

Default Value

None.

Power-On Default

None.

Results Returned

Result Code

Condition

<Service

Status>

The operation completed successfully (see

below for format; see Table 6-7 for output

values).

ERROR

An unrecognized or unsupported syntax

was entered.

Where <Service Status>is a series of formatted lines

indicating the Service State of the modem. The format and

description of the output elements are:

SERVICE AVAILABLE:<YES|NO>

SERVICE MODE:<mode>

PROVIDER:<provider>

GATEWAY:<gateway>

RSSI:<rssi>

REGISTRATION:<reg_status>

ROAMING:<YES|NO>

CALL STATE:<state>

CALL TYPE:<call_type>

CALL DURATION:<duration>

CALL NUMBER:<number>

BATTERY CHARGE:<percentage>

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Table 6-7. Modem Status Information

SERVICE

AVAILABLE:

YESif the modem has acquired Globalstar

service; otherwise NO.

SERVICE MODE:

Current service mode:

NO_MODE

AUTOMATIC

GLOBALSTAR

DEEP_SLEEP

SHUTDOWN

SOFT_RESET

LPM

ANY_MODE

RESELECTION_NEXT

PROVIDER:

GATEWAY:

RSSI:

Current Service Provider; or blank.

Gateway number in decimal; or -1.

Received signal strength, from 0 to 4:

0=no signal

4=strong signal

REGISTRATION:

ROAMING:

Current registration status of the modem

with the Gateway:

NO=not registered

YES=registered

YESif roaming. NOotherwise.

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Table 6-7. Modem Status Information (continued)

CALL STATE:

Current call state:

IDLE

SETUP_ORIG

SILENTRETRY

SETUP_TERM

AUTORETRY

CALLINPROG

HPSE_RESUME

MULTITONE

TIMEPAUSE

CALL TYPE:

Service Option used in the current call:

SIGNALING

VOICE(not applicable for data modem)

MARKOV

LOOPBACK

TIA_PPP

TIA_ASYNC

(or blank if no call is in progress)

CALL DURATION:

Duration of the ongoing call or the last

completed call; or 0 if no call has been made

since power up

CALL NUMBER:

Most recently called or currently calling

number.

BATTERY CHARGE:

Percentage of battery life remaining.

Special Calls and Services Commands

Time of Day ($QCTOD)

Syntax

$QCTOD[=<tformat|=?>]

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Description

Exports the time of day as received from the Globalstar

system. The application can use this to obtain an accurate

time.

Values

Format type 0 [see below]

Format type 1 [see below]

Default Value

Power-On Default

None.

Results Returned

Result Code

Condition

<Formatted TOD> <tformat>was a valid format specifier.

The TODstring has two possible formats:

NOTE: The time is reported in UTC.

Format 0:

Format 1:

The format fields have the following

definitions:

<YYYY>

<DOY>

Year

Day of Year (starting with 0

for Jan 1)

<HH>

<MM>

<SS>

<DD>

Hours, 24 hour format

Minutes

Seconds

Day of month, same as

standard calendar days

<MM>

Numeric month, starting

at 1

ERROR

An unsupported syntax or <tformat>was

entered. Or unable to report time because

the system has not been acquired yet.

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Position Location Service ($QCPLS)

Syntax

$QCPLS[=<position type>|=[<position type>],[<time

format>]|=?]

Description

Returns the current position of the modem and the time (in

UTC) that the position information was acquired. $QCPLS=?

queries for the acceptable ranges of <position type>and

<time format>.

If additional characters are received on the same port while this

command is processing, the command will be aborted.

Note

As shown in the syntax above, either <position type>or <time

format>can be optionally specified. If only one value is specified then

the other is left unchanged. If both values are left unspecified then both

are reset to their power-on default values. Optional parameters must be

separated by commas. The commas act as place holders (in the

command parser) for the missing optional parameter.

Values

Request the current position.

Get the last position successfully obtained.

TOD format ‘0’

(See Time of Day ($QCTOD) on page 6-64.)

TOD format ‘1’

(See Time of Day ($QCTOD) on page 6-64.)

Default Value(s)

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Power-On Default

None.

Results Returned

Result Code

Condition

N: DDD MM SS

W: DDD MM SS

<position type>was a valid

position type specifier.

The format of position is given as

DEGREES (DDD), MINUTES (MM) and

SECONDS (SS) for both Longitude

(N:) and Latitude (W:) coordinates.

TIME:<time of

position>

The time of the position measurement

(TIME:) is also returned to the DTE

and follows the format of the Time of

Day (TOD) return value (specified in

Time of Day ($QCTOD) on page 6-64).

The requested format is specified

using the second <time format>

parameter to the command.

ERR:<positioning

error>

The positioning error (i.e., estimated

accuracy) of the returned position.

(ERR:) is specified in units of distance

rather than percent. The possible

return values are:

< 300m (meters)

< 1km

< 2km

< 5km

< 10km

< 20km

< 100km

ERROR

An unsupported syntax was entered.

Or unable to determine the current

position, or there is no previous

position to fetch.

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Markov Statistics ($QCMSTATS)

Syntax

$QCMSTATS

Description

Returns the statistics from the last Markov call, or the

current statistics from a Markov call in progress.

Values

None.

Default Value

None.

Power-On Default

None.

Results Returned

Result Code

Condition

The statistics of the previous Markov call (or

current call if one is in progress).

Note: The statistics may not be saved over a

power-down or reboot of the modem.

The format of the <Markov Stats>return

strings is as follows (all returned statistics are

in Hex):

MARKOV RATE:

BIT FRAMES:

BAD FRAMES:

TOTAL FRAMES:

EXPECTED/RECEIVED RATE:

(expected rates frames are on the vertical axis;

received rate frames are on the horizontal axis,

going from zero to full in each case)

GOOD FRAMES:

(frame rate order: zero quarter half full)

ERASURES:

(frame rate order: zero quarter half full)

If no current <Markov Stats>are available

(either from a previous or current call) for

whatever reason, the <Markov Stats>table is

filled with zeros.

ERROR

An unsupported syntax was entered.

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AT Command Reference

Set Mode ($QCMODE)

Syntax

$QCMODE[=<mode>|?|=?]

Description

This command sets the modem’s call mode. It does not affect

the Rm interface baud rate (set by the +IPRcommand, as

described on page 6-38).

When the modem is powered up, the modem call mode is set to 1

(auto-detect mode). However, when the modem is reset by the Z

command, the current call mode is left unchanged. Resetting with the

&Fcommand does reset the call mode.

Note

Values(s)

Auto-detect Mode

Globalstar Only Mode

Since the GSP-1620 modem is single-mode (Globalstar only),

“Auto-detect Mode” has the same effect as “Globalstar Only Mode.” The

GSP-1600 Tri-Mode Phone has two additional modes: digital cellular

and analog cellular.

Note

Missing Parameter Default Value(s)

Power-On/Reset Default Value(s)

Results Returned

Result

Condition

<mode>is supported and Call

Mode is set.

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Result

Condition

ERROR

<mode>is not supported and Call

Mode is left unchanged.

$QCMODE:<mode>

?is used to query current setting.

$QCMODE:(1-2)

=?is used to query acceptable

range of the <mode>parameter.

Protocol Stack Modification Commands

We strongly recommend that you do not use these commands if you do

not have a thorough understanding of what they do and of how TCP

networking works.

Caution

TCP is used to ensure end-to-end integrity of data on the

over-the-air link in an asynchronous data call. These

commands allow modification of the TCP stacks between the

modem and the Gateway IWF.

Improperly setting these commands can cause severe performance

degradation.

Caution

TCP Stack Changes ($QCTCP)

Syntax

$QCTCP[=<tcpmod>|[=<tcpmod>[,<lowertxmss>[,

<uppertxmss>[,<rxmss>[,<minrto>[,<maxrto>[,<minato>[

,<maxato>[,<maxtcpbackoff>]]]]]]]]]|?|=?]

Description

Allows you to modify the behavior of the TCP stack by

accessing to several variables that control it. This includes

the ability to change the maximum segment size for both

transmit and receive, as well as the ability to change the

values controlling the retransmit timer, and the

acknowledgment timer.

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As shown in the syntax above, any of the parameters can be optionally

specified. Any unspecified value is left unchanged. Optional parameters

must be separated by commas. The commas act as place holders (in

the command parser) for the missing optional parameters.

Note

Defines whether or not to use the default

TCP values, or to use the values passed in.

Sets the lower bound for outgoing TCP

packet sizes.

Sets the upper bound for outgoing TCP

packet sizes. The variable can be

overwritten during TCP negotiation if the

other end of the connection sets a TCP MSS

lower than this value.

<rxmss>

Sets the size for the incoming TCP MSS.

Sets the minimum value for the range used

to calculate the retransmit timeout.

Sets the maximum value for the range used

to calculate the retransmit timeout.

Set the minimum value for the range used

to calculate the acknowledgment timeout.

Sets the maximum values for the range

used to calculate the acknowledgment

timeout.

<tcpmaxbackoff> Sets the number of TCP backoffs allowed

before tearing down the connection. A value

of zero will keep the phone from tearing

down the call based on the number of TCP

backoffs.

If <tcpmod>is equal to one, the values in the rest of the

variables are put into effect. If <tcpmod>is set to zero, the rest

of the values entered into the AT command are ignored, and

the default values are restored to the internal variables.

Valid Value(s)

Use the default values for the TCP stack.

Use the values passed in for the TCP stack.

0-1500 Lower bound for the transmit MSS

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0-1500

Upper bound for the transmit MSS

<rxmss>

0-1500

Receive MSS requested

0-120000 Minimum Retransmit Timeout (in ms)

0-120000 Maximum Retransmit Timeout (in ms)

0-1000

Minimum Acknowledgment Timeout (in ms)

Maximum Acknowledgment Timeout (in ms)

0-6000

TCP backoffs will never release call.

Number of TCP backoffs before terminating call.

1-100

Missing Parameter Default Value(s)

See “Description” above for values assumed when optional

parameters are missing.

Power-On/Reset Default Value(s)

= 0

<rxmss>

= 536

= 500

= 6000

= 100

= 6000

<tcpmaxbackoff> = 0

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Results Returned

Result Code

Condition

The values entered into the

command were correct.

ERROR

Incorrect syntax, value out of range,

or incorrect number of parameters

$QCTCP: <tcpmod>,

<lowertxmss>,

<uppertxmss>,

? is used to query current setting.

<rxmss>,<minrto>,

<maxrto>,<minato>,

<maxato>,

$QCTCP: (0-1),

=? is used to query acceptable range

if the <value> parameter

(0-1500), (0,1500),

(0-1500),(0-54464),

(0-54464),(0-1000),

(0-6000),(0-100)

Use Van Jacobsen Header Compression ($QCVJ)

Syntax

$QCVJ[=<usevj>|?|=?]

Description

Allows Van Jacobsen header compression to be turned on or

off for the next negotiated connection.

Valid Value(s)

<usevj>

Turn Van Jacobsen header compression off.

Use Van Jacobsen header compression.

Missing Parameter Default Value(s)

Use Van Jacobsen header compression.

Power-On/Reset Default Value(s)

<usevj>

= 1

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Results Returned

Result Code

Condition

The requested operation was successful.

If an illegal value is detected

ERROR

$QCVJ: <usevj> ?Is used to query current <usevj>value.

$QCVJ: (0-1)

=?is used to query acceptable range of

parameters.

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INTEGRATING GSP-1620 MODEMS

INTO OEM PRODUCTS

OEMs can buy QUALCOMM Globalstar GSP-1620 Satellite

Data Modems in bulk direct from QUALCOMM, then

integrate them into market-specific products. Bulk modems

come with antennas, but not cables.

As an OEM, you provide custom modem and antenna cables

as appropriate to your specific products. You must also mount

the modem boards in protective enclosures, which field

technicians can then install on-site, connected to antennas.

This chapter is intended for

•

OEMs who integrate GSP-1620 modem hardware into

products (for example, oil pipeline monitors)

•

Field technicians who install those products on site

It is assumed that OEMs and field technicians can work

directly from the technical specifications. This chapter

contains the following information:

•

Integrating modems into products

❑

Hardware description of the modem, including

mechanical descriptions; specifications;Data, Control

and Diagnostic port signaling and pinouts; DC power;

and grounding information

❑

Guidelines for mounting modems in enclosures

•

Mounting antennas on-site

❑

Antenna specifications

❑

Antenna cable specifications and lengths

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❑

Positioning antennas for Globalstar service, and

mounting and sealing antennas

•

Environmental specifications for the GSP-1620 modem

and antenna

For your safety and to avoid potential damage to the equipment,

observe the Cautions and Warnings on page xxiv.

Caution

When integrating the GSP-1620 modem and its antenna into OEM

products, be sure to abide by all RF restrictions as described in

Appendix B.

Integrating Modems into Products

This section describes the QUALCOMM Globalstar

GSP-1620 Satellite Data Modem hardware, including

mechanical descriptions of the modem, its Data, Control and

Diagnostic port signals and pinouts, DC power, and

grounding.

Using this information for your specific products, you can

create custom cables, which connect a modem (the DCE) to:

•

A terminal or processor (the DTE) running custom

application software for your product — using the Data

port only, or both Data and Control ports

•

An appropriate DC power source

A Dielectric Resonator Antenna (DRA) — for information

about installing antennas and calculating cable lengths,

see Mounting Antennas On-Site on page 7-22.

This section also describes the Diagnostic port, although typically it is

used only during development and for service programming.

Note

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Modem Mechanical Description

The GSP-1620 modem is a sandwich made of two circuit card

assemblies (CCAs) that are open and unprotected. As a

result, the GSP-1620 modem must be shielded from direct

impacts, precipitation, and particulates.

I/O is obtained through four connectors:

•

Power, Data, and Control functions are accessed via a

25-pin “D” style connector.

Globalstar RF transmit signals are routed to an

MCX-style coaxial connector (labeled J3 on the board).

Globalstar RF receive signals are routed to an MCX-style

coaxial connector (labeled J7 on the board).

The Diagnostic port interface is a 9-pin “D” style

connector.

Modem Board Layout

This section includes the following technical drawings

depicting the modem:

•

GSP-1620 Modem Board Layout (Top View), Figure 7-1

GSP-1620 Modem Board Layout (Side and Bottom View),

Figure 7-2

In Figure 7-1 and Figure 7-2, dimensions are shown as: millimeters

[inches]. Millimeters are the controlling dimensions on these drawings.

Inch dimensions are for reference only.

Note

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Figure 7-1. GSP-1620 Modem Board Layout (Top View)

75.00

[2.95]

31.18

[1.228]

11.84

[.466]

190.00

[7.480]

158.75

[6.250]

127.50

[5.019]

7.28

[.287]

37.51

[1.477]

7.27

[.286]

Holes marked “A” connect to chassis ground.

7-4

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Figure 7-2. GSP-1620 Modem Board Layout (Side/ Bottom Views)

180.00

[7.087]

100.00

[3.937]

14.04

[.553]

6X ø 3.50

[.138]

5.00

[.197]

17.16

[.676]

67.00

[2.638]

4.00

[.157]

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Modem Dimensions and Weight

Modem dimensions are 190 x 75 x 17 millimeters (7.48 x 2.95

x 0.68 inches).

Modem weight is less than 180 grams (6.3 ounces).

Modem Antenna Connectors

The GSP-1620 modem has two (2) MCX snap-in connectors

for the antenna leads, connecting the DRA antenna to the

modem:

•

Transmit (Tx) lead is labeled J3.

Receive (Rx) lead is labeled J7.

When you connect antenna cables, be careful to connect the Tx

connector on the antenna to the Tx connector (J3) on the modem, and

the Rx connector on the antenna to the Rx connector (J7) on the

modem. Crossing the Tx and Rx cables can damage the modem.

Caution

The MCX connectors are secured only by a solder joint and are not

designed to withstand excessive force. When cables are connected to

these connectors, care must be taken to ensure adequate strain relief is

provided.

Data and Control Ports

The Data and Control ports are combined into a single DB-25

male upright connector, which provides the primary user

interface:

•

The connector contains two (2) 9-pin serial ports, DC

power leads, and a reset lead.

•

Line speed for the Data port is variable between 300 bps

and 115.2 kbps. (This is different from the over-the-air

Data port rate, which is 9600 bps.)

•

Line speed for the Control port is fixed at 9600 bps.

Signaling uses 8 bits, no parity and 1 stop bit (8,N,1).

All ports are ESD and short-circuit protected.

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The modem signal naming convention assumes that the modem is the

DCE and that the user application is the DTE.

Note

DTR/DSR Signal and Power On/Off

An active DTR on any of the three serial ports (Data, Control

or Diagnostic) turns on the GSP-1620 modem (if DC power is

applied first). The modem then boots up from the shut-down

state and asserts DSR to indicate that it is booted up and

ready to communicate.

The modem starts its power-down sequence only after the

DTR lines on all three serial ports connected to the modem

are de-asserted for a minimum of one second. Just before the

modem powers off, it de-asserts DSR to let the application

know that it is okay to remove DC power to the modem

without risk of losing volatile data.

This mode of operation is useful in cases where power to the

modem as well as the rest of the system might be turned off

periodically to conserve battery power.

In case the modem “hangs up” and the watchdog circuit does

not reset the modem, you can reset the modem by pulling the

MODULE_RESET_Nlow for a period of 5 seconds or more and

releasing it to allow it to float. Pulling the line low has the

effect of a power-on reset and not just a watchdog reset.

The watchdog circuit is internal to the modem and is a protection against

a possible crash of the modem software. The RESET line should be

used only as a last-resort method of resetting the modem when the

application is sure that the modem is not responding to any commands.

Asserting the RESET line can result in loss of non-volatile data,

including the current state of the modem.

Caution

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Changing Data and Control Port Configuration

You may change the Data and Control port configuration at

any time, provided that the following requirements are met:

•

The minimum hold time for both asserting and

de-asserting either port DTR is 10 milliseconds.

•

The minimum time from asserting DTR to data

transmission is 10 milliseconds.

If these minimum times are not observed, AT command

processing may be affected. The maximum time for holding

all DTRs de-asserted is one second. If this time is exceeded,

the modem will begin its power-down sequence.

Whenever the DTR signal of the Data or Control port has

been de-asserted for a period of 10 seconds, the GSP-1620

modem shuts down the port’s RS-232 transmitter to conserve

power. This causes the port’s DSR signal to be de-asserted.

The effects of changing the port configuration are detailed in

Port Activation (DTR) Changes during Operation on page

5-15.

Control Port Signals

The Control port (CP) is an RS-232-level asynchronous

interface operating at 9600 bps using Transmit Data (TxD),

Receive Data (RxD), Data Terminal Ready (DTR), Data Set

Ready (DSR), and Signal Common (GND).

RxD and TxD perform data transfer and handshaking, while

DTR is used to turn on the modem and to let it know that

there is an application waiting to talk to it.

The Control port specifically allows dedicated usage of the

Data Port by the application. It allows all AT commands,

modem alerting, and SMS messages to be sent

simultaneously via a separate “control” port to/from the

modem. This separation of functionality is especially useful in

dormant mode, when the application and host sessions are

active, and thus the Data port appears active/in use, although

a Globalstar traffic channel is not up (no “In Call Status

Message”).

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The Control port is “enabled” by asserting DTR on the Control

port.

In case of a reboot (due to fatal errors or any other reason),

the DSR line will be set inactive so that the user application

can detect a reset condition and take the necessary action.

Data Port Signals

The Data port (DP) is a hardware-flow controlled, RS-232

level, asynchronous serial interface:

•

The Data port uses the following RS-232 leads for

operations: Transmit Data (TxD), Receive Data (RxD),

Clear To Send (CTS), Data Terminal Ready (DTR), Data

Set Ready (DSR), Ready to Send (RTS), Data Carrier

Detect (DCD), Ring Indicator (RI), and Signal Common

(GND).

•

The format for data on the Data port is 8 bits, no parity

and 1 stop bit.

The baud rate is user-configurable to selected rates from

300 bps to 115.2 kbps. The baud rate is adjustable in

software.

•

In case of a reboot (due to fatal errors or any other

reason), the DCD and DSR lines will be set inactive so

that the user application can detect a reset condition and

take the necessary action.

Functionally, the Data port integrates AT commands and

alert messages as well as application data traffic.

DB-25 Data and Control Port Pinouts

Table 7-1 provides detailed information about the Interface

connector pinouts.

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Table 7-1. Interface Connector Pinouts

Number

Signal Name Signal

Level

Direction

User <-> Modem

Description

Chassis

Ground

Chassis Ground

Isolated chassis ground

DP_TXD

DP_RXD

DP_RTS

DP_CTS

DP_DSR

RS-232

DTE -> DCE

DTE <- DCE

DTE -> DCE

DTE <- DCE

Data port TXD

Data port RXD

Data port RTS

Data port CTS

This pin is the DSR for the

Data port and is asserted

when the modem detects

activity on the Data port

and is ready to

communicate with the

DTE over this port. This

signal is de-asserted when

the modem detects no

activity on the Data port;

or is de-asserted as an

acknowledgment to the

user, indicating that the

modem has completed its

power- down sequence

after the DTR lines of all

serial ports have

de-asserted.

Ground

RS-232

Ground return

DTE <- DCE

Ground return

Data port DCD

Modem power

Ground return

Control port DTR

DP_DCD

DC_POWER 5.6V-16V

Ground

RS-232

Reserved

RS-232

Ground return

DTE -> DCE

Reserved

CP_DTR

Reserved

CP_TXD

DTE -> DCE

Control port TXD

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Table 7-1. Interface Connector Pinouts (continued)

Number

Signal Name Signal

Level

Direction

User <-> Modem

Description

CP_DSR

RS-232

DTE <- DCE

This pin is the DSR for the

Control port and is

asserted when the modem

detects activity on the

Control port and is ready

to communicate with the

DTE over this port. This

signal is de-asserted when

the modem detects no

activity on the Control

port; or is de-asserted as

an acknowledgment to the

user, indicating that the

modem has completed its

power- down sequence as

no active DTR lines were

seen on the serial ports.

CP_RXD

MIC_P

RS-232

Analog

DTE <- DCE

Control port RXD

Input to modem

Analog Microphone Input

(Reserved for Future Use)

MIC_N

Analog

Input to modem

Analog Microphone Input

(Reserved for Future Use)

Reserved

DP_DTR

Ground

DP_RI

Reserved

RS-232

Ground

RS-232

Analog

Reserved

DTE -> DCE

Ground return

DTE <- DCE

Data port DTR

Ground return

Data Port RI

SPKR_P

Output from

modem

Analog speaker output

(Reserved for Future Use)

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Table 7-1. Interface Connector Pinouts (continued)

Number

Signal Name Signal

Level

Direction

User <-> Modem

Description

SPKR_N

Analog

Output from

modem

Analog speaker output

(Reserved for Future Use)

MODULE_

RESET_N

TTL

Input to modem

Hard reset of the modem,

inverted logic. This line

should be left floating for

normal modem operation.

In case the application

detects that the modem is

not responding, it can

initiate a hard reset of the

modem by pulling this line

low (below 0.3V) for more

than 5 seconds. The

modem will reboot after

the line is allowed to float.

Diagnostic Port

The Diagnostic port consists of a single DE-9 male upright

connector, located on the right side of the GSP-1620 modem

(see Figure 7-1).

By connecting a Diagnostic cable (included in the Modem

Integrator’s Kit) or a custom cable to the Diagnostic port,

you can:

•

Service-program a modem or upgrade its software, using

the Globalstar User Terminal Program Support Tool

(UTPST).

•

Monitor or verify some modem functions, using the

QUALCOMM Globalstar Modem Operation Monitor.

Normal field usage does not require that a cable be connected to the

Diagnostic port on the modem, since the port is typically used for

development and programming only.

Note

The Diagnostic cable includes a switch box that controls

whether the cable’s DTR (Data Terminal Ready) signal is

asserted (“POS 1 DTR to GND”) or de-asserted (“POS 2 DTR

Open” or “POS 3 Not Used”). When DTR is asserted, the

modem powers up immediately if power is provided. Before

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powering down the modem with this cable attached, you must

set this switch to “POS 2” or “POS 3.” (“POS 2” and “POS 3”

are functionally equivalent.) For more information about

using the Diagnostic cable, see Connecting the Diagnostic

Cable on page 2-7.

For more information about the UTPST, see UTPST Overview on page

3-2. For more information about the Operation Monitor, see the

QUALCOMM Globalstar Modem Operation Monitor User Guide

(80-99399-1).

Note

Diagnostic Port Pinouts

Table 7-2 on page 7-14 provides detailed information about

the Diagnostic port pinouts.

The Diagnostic port uses un-translated 3.3V TTL levels. In

Table 7-2, all signals are TTL levels unless otherwise

specified.

All pins on the Diagnostic port are ESD protected but not short-circuit

protected. Care must be taken when using these pins to avoid any short

circuits to Ground/Power.

Caution

Note

Hardware flow control is required on the Diagnostic port. If the two flow

control pins are not implemented by the user, the Diagnostic port may

not function correctly.

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Table 7-2. Diagnostic Port Pinouts

Signal Name

Direction

Description

Number

User <-> Modem

Ground

Ground return

DM_RXD

Output from

modem

Diagnostic port RXD

DM_TXD

Input to modem

Diagnostic port TXD

Diagnostic port DTR

DM_DTR_N

The DTR line has only one function:

to turn on the modem when power is

applied but no other device is

connected. When DTR is asserted, the

modem powers up immediately if

power is provided.

Pulled high to input voltage through

a 47K resistor in the modem.

Ground

Ground return

Input DC POWER Input/Output

Used for an active translator

Diagnostic cable. 5.6V-16V,

unfiltered in the modem. If this pin is

used as the source of power to the

modem, users must provide sufficient

filtering to comply with conducted

EMI specifications; see DC Power on

page 7-15.

DM_RTS_N

DM_CTS_N

Input to modem

Diagnostic port RTS

Used for hardware flow control.

Output from

modem

Diagnostic port CTS

Used for hardware flow control.

DM_PROGRAM_

FLASH

Allows programming of the modem.

Apply 13V +/- 10%, 50mA (maximum)

to program the flash in the modem.

This is required for all software

upgrades as well as service

programming.

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DC Power

The GSP-1620 modem requires input DC power ranging from

5.6 V to 16 V, with 1 Amp (maximum). The modem DC input

power must be clean (maximum of 50 mV peak-peak ripple

and noise) and must be within the absolute maximum voltage

range of 5.6 V to 16 V under all conditions. For typical DC

power consumption limits, see Power Consumption on page

7-16.

The GSP-1620 modem uses a DC/DC converter to source its

internal operating voltages and behaves like a constant

power load over varying input voltages that has a varying

input impedance when the modem is transmitting data. This

creates a potential for oscillations on the DC power line if the

input impedance of the modem is lower than that of the power

supply sourcing the power.

The approximate minimum input impedance of the modem is

given by R = V /P

where V is the operating voltage of the

max

modem and P

is the maximum power consumed by the

max

modem. For example, the minimum input impedance of the

modem at 12V would be approximately 12*12/5.4 = 26.7

Ohms. Any DC power supply capable of supplying the peak

demand of 5.4W at 12V would have this output impedance.

Additional design margin of at least 20% is recommended

beyond this minimum value.

Care should be taken that if additional EMI filtering is added

(see EMI Filtering on page 7-16), the impedance as seen by

the modem’s input power supply does not exceed this value.

Do not unplug the power cables while the modem is powered up.

This can cause ESD damage to the modem and also presents a

danger of electrical shock.

Warning

You must ensure that the output impedance of the power supply

sourcing DC power to the modem is always less than that of the input

impedance of the modem. Otherwise, a potential exists for oscillations

on the DC power line and the GSP-1620 modem will not operate as

designed.

Caution

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You CANNOT have both a DC power supply and an AC adapter

Caution

connected to the modem at the same time. This may cause the modem

to fail to power up and may damage the modem. If you connect the

Diagnostic cable to service-program the modem while using a DC

power source, make sure the AC wall adapter of the Diagnostic cable is

not plugged in to an AC outlet.

Surge Protection

As an OEM, you are responsible for ensuring that the input

voltage specification will never be exceeded.

Minimal transient protection is provided on the GSP-1620

modem board but this is intended only for low

energy/duration events (total transient power less than 1

kW). It is not intended to protect the modem in case of a

sustained over-voltage/lightning condition.

The use of a fuse is strongly recommended in the power

supply connecting to the GSP-1620 modem. The input surge

current requirements of the GSP-1620 modem are such that

a fuse with a minimum melting I t rating of 0.02 A seconds

will be sufficient.

EMI Filtering

Adequate conducted EMI filtering has already been provided

in the GSP-1620 modem to pass FCC and ETSI limits.

Additional filtering should not be necessary to meet these

requirements.

Should additional filtering be necessary, you must take precautions to

ensure that the above criteria are not violated. Please contact

QUALCOMM Incorporated for further details in such a case.

Caution

Power Consumption

Power consumption depends on a variety of factors such as

transmit power, input voltage, and data rate. Table 7-3

summarizes the power consumption of the GSP-1620 modem

at an input voltage of +12 V DC. All power estimates include

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the DC power consumption of the ODU antenna’s receive

section.

Table 7-3. Modem DC Power Consumption Estimates at 12 V DC

Input

Mode

Minimum

1.2 mW

280 mW

3.6 W

Typical

2.4 mW

500 mW

4.8 W

Maximum

6 mW

Shutdown

Standby

Transmit

2.4 W

5.4 W

The power modes in Table 7-3 are as follows:

•

Shutdown — The modem is not operational in this state

and reverts to this state when DTR lines are inactive.

•

Standby — The receiver section in the modem is active

during this time and the modem is ready to

transmit/receive data.

•

Transmit — The modem’s transmitter is active in this

state and may be in the process of transmitting/receiving

data.

Power-On

Power-on is controlled via OR’d DTR signals from any port

(Data, Control or Diagnostic). When DTR is asserted on one

or more of the ports, the GSP-1620 modem powers up. Upon

successful power-up, the modem asserts the DSR line of each

active port to let the user know that it has booted up

successfully and is ready to accept commands. Only the Data

and Control ports include DSR lines.

At least one port DTR signal must remain asserted during the entire

power-on sequence, until a DSR signal is asserted.

Note

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Power-Off

Power-off is also controlled via the OR’d DTR signals. When

all port DTRs have been de-asserted for a minimum of one

second, the GSP-1620 modem begins its power-down

sequence. After all software processing has concluded, the

modem powers off. This causes loss of power to the Data and

Control port RS-232 transmitters, de-asserting the ports’

DSR lines and informing the user it is safe to remove power.

Removing power before the DSR signals are de-asserted can corrupt

the modem’s service programming parameters and other data stored in

non-volatile memory.

Caution

All port DTR signals must remain de-asserted during the entire

power-down sequence, until the DSR signals are de-asserted.

Note

DSR/DCD will also go inactive in case of a fatal error that causes the

modem to reboot.

Hard Power Reset

Provisions equivalent to power cycling (see Pin 25 in Table

7-1) are included to “hard reset” a GSP-1620 modem under

user control. This pin is pulled low for a minimum of five

seconds to reset the modem. The line is normally left floating.

Grounding

The GSP-1620 modem has been designed to provide flexibility

in the area of grounding, with options to make connections

between digital ground and the OEM-provided chassis

ground (metallic enclosures). These grounding options are

also independently available for the DB-25 user interface,

Diagnostic port, and associated cable shields.

The GSP-1620 modem has been certified in accordance with

the technical and regulatory requirements of the FCC and the

European Union. The modem was tested in a configuration

that did not include, or require, an enclosure or specially

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shielded cable configuration in order to demonstrate

compliance with the requirements.

Your OEM application may need different grounding

configurations. The options are as follows:

•

Option 1 — A chassis ground connection to the modem

may be established using conductive support posts/

screws between the modem mounting holes, where the

solder mask is exposed on both sides of the board, and the

OEM-provided chassis (metallic enclosure or base).

•

Option 2 — DNI (do not install) resistors (R216 and

R217) on the modem circuit card allow for the option of

connecting digital ground and chassis ground together.

Option 3 — The user interface DB-25 cable shield

termination is provided through Pin 1 of the DB-25

connector. The cable shield drain wire may be connected

to this pin to provide a termination of the cable shield to

either chassis or digital ground (options 1 & 2

dependency).

The RF connector ground is the same as the signal and power ground.

As an OEM, you should understand this when designing an integrated

product for use in environments where surge protection may be

required. You should also be aware of this fact to avoid ground loops in

the final installation.

Caution

Modem Mounting Guidelines

QUALCOMM offers the GSP-1620 modem without a

mechanical enclosure, anticipating that OEMs will integrate

and package the modem into an enclosure or cabinet

appropriate to the end-user’s application. The enclosure must

shield the GSP-1620 modem from direct impacts,

precipitation, vibration, acoustic noise, and particulates.

The GSP-1620 modem has six mounting holes sized for M3

screws. All six mounting locations of the modem must be

fastened to a rigid structure to meet the vibration and shock

requirements specified in Integrating Modems into Products

on page 7-2.

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For hole size and locations, connector locations, and overall

envelope dimensions, see Figure 7-1 on page 7-4 and Figure

7-2 on page 7-5.

When you mount the GSP-1620 modem into an enclosure or onto a

surface, you must exercise care during the process. Adhere to the

following recommendations:

Caution

•

Observe handling precautions necessary to avoid damage

by ESD.

Fasten the modem to a planar surface of sufficient

flatness and rigidity to prevent flexing of the modem.

Use shock mounts when the environment includes

vibration in excess of that shown in Figure 7-9 on page

7-33.

•

Use acoustic dampening material when the environment

includes acoustic noise in excess of 110 dB OSPL (Overall

Sound Pressure Level).

•

Do not use fasteners that will damage the grounding

areas around the through holes.

Do not fasten the modem using tools with speed and/or

torque that will cause damage to the printed circuit

board.

•

Do not fasten the modem with enough clamping force to

damage the printed circuit board.

Exercise caution and do not damage components on the

modem during handling.

The GSP-1620 modem meets or exceeds all operational vibration

requirements defined in Table 7-5 when E-A-R damping feet

(MF-100-UC04-H, black) are used as shock mounts.

Note

QUALCOMM Mark on OEM Enclosures

Each GSP-1620 based product and its packaging shall bear

the “CDMA by QUALCOMM” mark and such other mark(s) of

QUALCOMM, or those which QUALCOMM has the right to

use and permit the use of, as QUALCOMM may designate

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from time to time upon notice to the buyer. The product

markings shall appear in a size and location reasonably

agreed to by both parties.

Figure 7-3 shows the QUALCOMM marking suitable for

OEM enclosures (included on the Modem Integrator’s Kit CD

as an Encapsulated PostScript [EPS] file).

Figure 7-3. QUALCOMM Mark for OEM Enclosures

Integrated Product Regulatory Labeling

The GSP-1620 modem as delivered by QUALCOMM

Incorporated is approved and labeled in accordance with the

requirements of the FCC and the European Union (see

Appendix B, RF Certification/Restrictions).

If the regulatory labeling is not visible when the modem is

integrated into the final product, then the labels must be

applied to the product enclosure. QUALCOMM Incorporated

authorizes the duplication and use of these regulatory

approvals on the integrated product provided that the modem

has not been modified or altered to the extent that the

electromagnetic performance has been degraded (see Modem

Mounting Guidelines on page 7-19 and Appendix B, RF

Certification/Restrictions).

The OEM or integrator is responsible for ensuring that the

product complies with all the regulatory requirements for

their target market and labeled accordingly.

The label must be located on the product in an area that can

be easily viewed and the type size must be large enough to be

legible without the aid of magnification. The integrator

labeling may be worded as follows:

“This Product Contains a Globalstar Radio Transceiver

FCC ID: J9CGSPDM1; CE 168”

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Mounting Antennas On-Site

This section describes the Dielectric Resonator Antenna

(DRA, also called an Outdoor Unit or ODU) hardware,

including specifications for antennas and antenna cable. It

also describes how to calculate antenna cable length and

mount antennas.

Modem Antenna Specifications

The GSP-1620 modem is to be used with an aluminum

Dielectric Resonator Antenna (DRA), as shown in Figure 7-4

and Figure 7-5. The modem DRA has a passive transmit and

an active receive section. The transmit (Tx) and receive (Rx)

connectors are labeled on the antenna.

You must be careful to connect the Tx connector on the DRA to the Tx

connector on the modem, and the Rx connector on the DRA to the Rx

connector on the modem. Crossing the Tx and Rx cables can damage

the modem.

Caution

Figure 7-4. DRA Side View

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Figure 7-5. DRA View Showing Connectors

O-Ring groove

RX Antenna connector

(labeled on antenna base)

TX Antenna connector

(labeled on antenna base)

Antenna Dimensions and Weight

The DRA antenna is 103 millimeters diameter by 63

millimeters tall (4.1 inches diameter by 2.5 inches tall).

The weight for the antenna is less than 250 grams (8.8

ounces).

Antenna Depiction

This section includes the following technical drawings that

depict the antenna:

•

GSP-1620 Antenna: DRA Top and Side Views, Figure 7-6

GSP-1620 Antenna: DRA Bottom View, Figure 7-7

In Figure 7-6 and Figure 7-7, dimensions are shown as: millimeters

[inches]. Millimeters are the controlling dimensions on these drawings.

Inch dimensions are for reference only.

Note

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Figure 7-6. DRA Top and Side Views

7-24

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Figure 7-7. DRA Bottom View and Mounting Hole Locations

23.50 mm

[.925]

6X M4.0 X

10.00 DEEP

38.11 mm

[1.500]

Antenna Cable Specifications

The DRA antenna requires two (2) cables, one for transmit

and one for receive:

•

The required connectors are plug SMA (DRA bulkhead) to

plug MCX (modem).

Transmit cable maximum 0.6 dB insertion loss @ 1618

MHz is required for the cable.

Receive cable maximum 3.0 dB insertion loss @ 2492 MHz

is required for the cable.

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QUALCOMM does not provide cables for OEM bulk

applications since OEMs may need cables of different lengths

for particular applications. Table 7-4 lists potential suppliers

of RF and microwave connectors and cable assemblies.

Table 7-4. Suggested RF Cable and Connector Suppliers

Volex Inc.:

Company:

Volex Inc.

1 Batterymarch Park,

Quincy, MA 02169

USA

Tel: +1 617 376-0555

Fax: +1 617 376-0590

Email: [email protected]

Web: http://www.volex.com/

Times Microwave:

Company:

Sales Representative:

Times Microwave Systems

358 Hall Avenue

Dave Murray

505 W. Ray Road

P.O. Box 5039

Suite #3

Wallingford, CT 06492-5039

Chandler, AZ 85225-7283

Phone: +1 480 786-1656

Fax: +1 480 786-3684

Page: +1 800 618-6140

email: [email protected]

Tel:1(800)TMS-COAX

(867-2629)

Tel: +1 203 949-8400

Fax: +1 203 949-8423

JPM:

Company:

JPM Corporate

155 North 15th Street

Lewisburg, PA 17837

USA

Tel: +1 570 524-8225

Fax: +1 570 524-5660

Web: http://www.jpmco.com/

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Calculating Antenna Cable Length

The maximum loss for an antenna cable of any length is 0.6

dB at 1.6 GHz for modem transmit and 3 dB at 2.5 GHz for

modem receive.

You must take these losses into account when calculating

antenna lengths for a GSP-1620 modem installation. For

example, the GSP-1620 Modem Integrator’s Kit utilizes three

feet of LMR 195 cable, which has a loss of 0.6 dB at 1.6 GHz.

Mounting Antennas at the Field Site

When mounting an antenna on-site, you must position it

properly to obtain Globalstar satellite signals. You can mount

the antenna on a flat surface or on a pole. In either case, you

should seal the antenna connectors against dirt and moisture.

The ODU antenna must be installed in a configuration that ensures a

minimum line-of-sight separation distance of 21.5 centimeters (8.5

inches) is maintained at all times between the ODU antenna and any

personnel.

Caution

Finding a Good Antenna Location

When installed in the field, the antenna of a GSP-1620

modem product must have a direct line of sight to the

Globalstar satellites. Keep in mind that Globalstar satellites

follow different paths across the sky, and you cannot predict

where they will be.

Position the DRA antenna outdoors where it has a clear view

of the sky, unimpeded by tall obstacles such as buildings and

trees.

Signal fading associated with trees, buildings, and other

obstacles that prevent a clear line-of-sight to the satellite can

cause degraded operation in a mobile environment.

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Globalstar frequencies are attenuated by wet snow. When mounting the

Note

antenna in a snowy location, you must make provisions to prevent snow

buildup on the antenna. Wet ice/snow must be restricted to a maximum

thickness of 20 centimeters (8 inches) by suitably mounting the

antenna. See Mounting and Sealing Antennas on Poles on page 7-29.

Securing Antenna Cables

When connecting the antenna cables, the recommended

torque for the SMA connectors is 0.79 to 1.13 N⋅m (7 to 10

in⋅lb).

Mounting and Sealing Antennas on Flat Surfaces

You can mount the modem antenna (DRA) on a flat surface

with six M4 screws. Depending on whether the surface is

smooth or rough, different methods are recommended for

sealing out moisture and dirt from the antenna’s SMA

connectors, which are not sealing connectors.

If the surface is smooth, flat, and solid, you can use an O-ring

to protect the antenna’s connectors. The O-ring should be

2.050 inches in diameter by 0.103 inch wide, to fit within the

groove on the bottom of the antenna. Silicone or ethylene-

propylene is the preferred material.

A recommended source is:

Parker Seal Group

18321 Jamboree Rd.

Irvine, CA 92612-1073

Tel: 800/272-7537

Fax: 949/851-2127

Parker part number: 2-137 E515-80

Description: O-ring, ethylene-propylene, 2.050 inches

diameter by 0.103 inch thick, 80 durometer

If you are mounting the antenna on rough surfaces, surfaces

which have already suffered significant environmental

damage (pitting, peeling paint, etc.), or surfaces that are not

sufficiently flat, it is recommended that you do not use an

O-ring. O-rings need smooth, flat surfaces to work.

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Instead, you should fill the groove on the antenna, which is

normally used for the O-ring, with an adhesive caulking

material that can bond to the aluminum antenna base and

the surface to which you are mounting the antenna. The

caulk seals out moisture and dirt.

For extra protection on either flat or rough surface mounts, you can coat

the antenna’s SMA connectors before sealing the antenna base; for

details, see Mounting and Sealing Antennas on Poles.

Tip

Mounting and Sealing Antennas on Poles

Instead of mounting the modem antenna (DRA) on a flat

surface or bulkhead, you can mount it on a pole with six M4

screws. A pole mount may be desirable in snowy locations, to

prevent wet ice or snow from building up to more than the

maximum allowable thickness of 20 centimeters (8 inches).

In a pole mounting, the antenna’s SMA connectors, which

are not self-sealing, are exposed to weather and precipitation.

Therefore, you should seal the SMA connectors with a

commercially available coating for outdoor cable or electrical

connectors. For example, you could use a product such as

“Liquid Electrical Tape” from PDI Inc., which is weather and

corrosion resistant.

Mounting Multiple Antennas

If required for your application, you can mount multiple

antennas within several feet of each other without creating

significant interference.

QUALCOMM testing has determined that if two antennas

are placed near each other and transmit on different

frequencies, only a barely perceptible (1 dB or less) increase

in 1605 emission occurs when tested at full jamming power.

This maps to isolation between antennas of 20 dB. Even for

antennas whose bases were touching (zero inches separation)

the isolation was 22 dB in the worst case of rotation with

respect to one another.

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Environmental Specifications

This section describes environmental specifications for both

the QUALCOMM Globalstar GSP-1620 Satellite Data

Modem and its Dielectric Resonator Antenna (DRA).

The environmental requirements specified herein are under

development and are subject to change without notice.

GSP-1620 Modem Environments

Environments affecting the GSP-1620 modem include

temperature/humidity, thermal radiation, altitude,

vibration, mechanical shock, and acoustic noise. This section

also discusses connector durability, materials, and shipping.

Temperature/Humidity

Operational

The GSP-1620 modem operates as specified during exposure

to the operational temperature/humidity envelope shown in

Figure 7-8.

Condensation on the GSP-1620 modem is not permissible.

Caution

Non-Operational

The GSP-1620 modem operates as specified after exposure to

the operational and non-operational temperature/humidity

envelopes shown in Figure 7-8.

7-30

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Figure 7-8. GSP-1620 Modem Temperature/Humidity Envelope

NON-OPERATIONAL ONLY

CONSTANT 39.1C DEW POINT

OPERATIONAL AND NON-OPERATIONAL

ENVELOPE

-10

-20

-30

-40

90 95 100

PERCENT RELATIVE HUMIDITY

Thermal Radiation

The temperature profile shown in Figure 7-8 includes

temperature rise due to thermal radiation, solar radiation,

and other heat loads. The GSP-1620 modem dissipates heat

that is dependent on the mode and the transmit power. The

dissipated heat is the difference between the DC input power

and the RF transmitted power.

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Altitude

Operational

The GSP-1620 modem operates at standard atmospheric

pressure altitudes between 0 and 15,000 meters (50,000 feet).

Non-operational

The GSP-1620 modem operates as specified after storage at

pressure altitudes ranging from 0 to 15,000 meters (50,000

feet).

Vibration

Operational - Random

The GSP-1620 modem operates as specified during exposure

to the random vibration spectrum defined in Figure 7-9.

Non-Operational - Random

The GSP-1620 modem operates as specified after exposure to

the random vibration spectrum defined in Figure 7-9.

Operational - Sinusoidal

The GSP-1620 modem operates as specified after exposure to

the swept sinusoidal vibration environment defined in Table

7-5 when E-A-R damping feet (MF-100-UC04-H, black) are

used as shock mounts.

Non-Operational - Sinusoidal

The GSP-1620 modem operates as specified after exposure to

the swept sinusoidal vibration environment defined in

Table 7-5.

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Figure 7-9. GSP-1620 Modem Random Vibration Spectra

10^-1

10^-2

10^-3

10^-4

10^-5

NON-OPERATIONAL

SPECTRUM

7.69 Grms

OPERATIONAL

SPECTRUM

0.51 Grms

100

1000

10000

Frequency (Hz)

Table 7-5. Swept Sine Vibration Definition

Double Amplitude

Displacement (inch)

Acceleration

(Gs)

Frequency Range (Hz)

0.28

0.59

2 to 6

Operational

0.5

6 to 500

2 to 8

Non-

2.04

4.08

8 to 200

200 to 500

Operational

E-A-R damping feet (MF-100-UC04-H, black) used as shock mounts

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Mechanical Shock

Operational

The GSP-1620 modem operates as specified while being

subjected to a half sine pulsed acceleration wave form of 11

milliseconds in duration, 2 Gs peak.

Non-Operational

The GSP-1620 modem operates as specified after being

subjected to a half sine pulsed acceleration wave form of 6

milliseconds in duration, 30 Gs peak.

Acoustic Noise

The GSP-1620 modem is sensitive to very high ambient noise

levels. Exceeding specified levels will cause degraded

performance. Steps must be taken to ensure that the noise

level at the module does not exceed 110 dB OSPL (Overall

Sound Pressure Level).

Digital Data Connector Durability

Applied Forces

The digital data connector meets all performance

requirements after application of a 24.5 newton force on the

mating connector, applied in six directions—two opposite

directions along each of three mutually perpendicular axes.

Mating cycles

The digital data connector meets all performance

requirements after a minimum of 3,000 connect/disconnect

cycles.

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RF Connector Durability

The GSP-1620 modem RF connectors meet all performance

requirements after 500 connect/disconnect cycles at a

maximum rate of 12 cycles per minute.

Materials

Shipping

The GSP-1620 modem is manufactured of non-nutrient

materials with respect to fungal growth.

The GSP-1620 modem as packaged for shipment meets the

pre-shipment test procedures specified in the National Safe

Transit Association, Project 1A.

Dielectric Resonator Antenna (DRA) Environments

Since the GSP-1620 Dielectric Resonator Antenna (DRA)

communicates with Globalstar satellites, it must be

positioned outdoors where it has a clear view of the sky.

As a result, environments affecting the DRA include

temperature/humidity, thermal radiation, icing/freezing

rain/snow, altitude, vibration, and mechanical shock. This

section also discusses RF connector durability, materials, and

shipping.

Temperature/Humidity

Operational

The DRA operates as specified during exposure to the

operational temperature/humidity envelope shown in Figure

7-10.

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Non-Operational

The DRA operates as specified after exposure to the

operational and non-operational temperature/humidity

envelopes shown in Figure 7-10.

Thermal Radiation

The temperature profile shown in Figure 7-10 includes

temperature rise due to thermal radiation, solar radiation,

and other heat loads.

Figure 7-10. DRA Temperature/Humidity Envelope

CONSTANT 40C DEW POINT

OPERATIONAL AND NON-OPERATIONAL

ENVELOPE

-10

-20

-30

-40

100

PERCENT RELATIVE HUMIDITY

7-36

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Icing/Freezing Rain/Snow

Any ice or freezing rain on the radome of the ODU will cause

degraded performance. Steps must be taken to ensure that ice

formation is kept to a minimum on the ODU.

Globalstar frequencies are attenuated by wet ice and snow

and OEMs must make provisions (such as installing the

antenna on a pole) to prevent snow buildup on the antenna.

Wet ice/snow must be restricted to a maximum thickness of

20 centimeters (8 inches) by suitably mounting the antenna

(see Mounting Antennas at the Field Site on page 7-27).

Altitude

Operational

The DRA operates at standard atmospheric pressure

altitudes between 0 and 15,000 meters (50,000 feet).

Non-Operational

The DRA operates as specified after storage at pressure

altitudes ranging from 0 to 15,000 meters (50,000 feet).

Vibration

Operational - Random

The DRA operates as specified during exposure to the random

vibration spectrum defined in Figure 7-11.

Non-Operational - Random

The DRA operates as specified after exposure to the random

vibration spectrum defined in Figure 7-11.

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Figure 7-11. DRA Random Vibration Spectrum

1.00

0.80

0.60

0.50

0.40

0.30

0.20

0.10

0.08

OPERATIONAL AND

NON-OPERATIONAL

SPECTRUM

15.6 Grms

0.06

0.05

0.04

0.03

0.02

0.01

100

1,000

10,000

FREQUENCY (Hz)

Mechanical Shock

Operational

The DRA operates as specified while being subjected to a half

sine pulsed acceleration waveform of 6 milliseconds in

duration, 30 Gs peak.

Non-Operational

The DRA operates as specified after being subjected to a half

sine pulsed acceleration waveform of 6 milliseconds in

duration, 100 Gs peak.

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RF Connector Durability

The DRA RF connectors meet all performance requirements

after 500 connect/disconnect cycles at a maximum rate of 12

cycles per minute.

Materials

Shipping

The DRA is manufactured of non-nutrient materials with

respect to fungal growth.

The DRA as packaged for shipment meets the pre-shipment

test procedures specified in the National Safe Transit

Association, Project 1A.

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TROUBLESHOOTING

If you are having a problem with a QUALCOMM Globalstar

GSP-1620 Satellite Data Modem, try the troubleshooting tips

in Table 8-1. If that does not solve the problem, you can

contact QUALCOMM Globalstar Customer Service, as

described in Appendix D.

Table 8-1. Troubleshooting Modem Problems

Problem

Possible Solutions

■

The antenna is not properly

connected, or is not outside

with a clear view of the sky.

AT$QCSTATUScommand

returns RSSI:0

-or-

Antenna cables may be

crossed (that is, the modem

Rx cable may be connected

to the antenna Tx Transmit

connector, and vice versa).

Make sure modem Tx is

connected to the antenna Tx

connector and the modemRx

is connected to the antenna

Rx connector.

DTE application determines,

after a service alert, that

there is no Globalstar signal.

-or-

Current consumption of the

modem with antenna

connected is lower by about

30mA.

■

The modem may not be

service-programmed

correctly. See

AT$QCSTATUS command

returns Registration:No

Service-Programming

Modems on page 3-1 and

consult your SP to make

sure you have the correct

service programming

values.

■

HyperTerminal is connected

to the wrong COM port.

The modem is not plugged in

to a power source.

Upon attempting a

connection, the SELF TEST

RESULTis not received within

a few seconds.

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Table 8-1. Troubleshooting Modem Problems (continued)

Problem Possible Solutions

■

Both the AC power

The modem does not seem to

be getting power, even

though it is plugged in.

connector on the diagnostic

cable and the DC power

connector on the interface

cable are plugged in. Only

one can be used at a time.

■

DTR is not asserted on a

serial port. Connect one of

the modem’s serial ports

(Data, Control, or

Diagnostic).

■

Command echoing has been

turned off. Type ATE1or ATZ

to turn echoing back on.

AT commands that you type

in HyperTerminal do not

appear on the screen.

Check to see if the Control

port is active. AT commands

will not work on the Data

port when the Control port is

active.

AT commands are not

recognized on the Data port.

■

Make sure the baud rate in

HyperTerminal or Dial-Up

Networking matches that

for the modem port. The

Control port is 9600 only;

the Data port default is

38400 but can be set to

selected rates from 300 to

115200.

HyperTerminal or Dial-Up

Networking cannot talk to

the modem.

8-2

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GLOBALSTAR BACKGROUND

Globalstar is a voice and data telecommunications system

utilizing a constellation of 48 low-Earth-orbit (LEO)

satellites, providing nearly world-wide coverage (70 N to

70 S latitudes).

Globalstar Limited Partnership (GLP), the owner/operator of

the LEO constellation, is a strategic partnership composed of

many of the world’s leading telecommunications providers:

•

Alenia Marconi

China Telecom

DACOM

Daimler-Chrysler Aerospace

Elsacom

Globalstar USA, Canada, and Mexico (formerly known as

Vodaphone/Airtouch)

•

Hyundai

QUALCOMM Incorporated

Space Systems/Loral

TESAM (joint venture between France Telecom and

ALCATEL)

•

Vodaphone

The Globalstar system consists of a space segment, and a

ground or earth segment.

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Space Segment

The space segment consists of 48 LEO satellites (and eight

additional in-orbit spares) built by Loral Space Systems and

operated by Globalstar Limited Partnership (GLP) in San

Jose, CA.

Compared to medium-Earth-orbit or geostationary-

Earth-orbit (MEO/GEO) satellites, LEO satellites offer

several advantages: minimal delay (~250 ms or comparable to

terrestrial digital cellular), multi-satellite handoff, extremely

small antenna, lower power consumption, and lower cost.

Ground Segment

The ground segment consists of Earth stations called

Gateways, which provide service in specific geographical

areas. The Gateways are deployed worldwide and

communicate via C-band frequencies to/from the LEO

satellites, which serve as “bent pipe” transponders.

User Terminals communicate to/from a Gateway ground

station using L- and S-band frequencies, via the LEO

satellites.

A User Terminal can be either a QUALCOMM Globalstar

GSP-1600 Tri-Mode Phone, or QUALCOMM Globalstar

GSP-1620 Satellite Data Modem.

Coverage

Figure A-1 shows Globalstar coverage areas and availability

dates.

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GlobalstarBackground

Figure A-1. Globalstar Coverage Availability

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The map and list in Figure A-1 depict current and planned

Globalstar service coverage. Actual coverage may vary

because of Gateway deployment, local licensing and other

factors, including environmental conditions. “Service” means

that a phone can be purchased and activated in that country.

You may be able to use your Globalstar phone in areas of

extended Gateway coverage; however, neither Globalstar nor

your Service Provider warrants that call duration or quality

in these areas will meet normal system standards.

Globalstar roaming is not included. Please contact your

Service Provider for information about roaming availability.

Carriers

Each coverage territory is typically aligned with country

boundaries. A coverage territory has one or more Service

Providers (SPs) or carriers that offer service to users, similar

to a “cellular” model. Globalstar licenses the Service Provider

or carrier to offer service in a part of the worldwide coverage

area (one or more countries).

The Service Provider offers “airtime” to the OEM or end user.

It also provides a customer care center and keeps billing

records for the satellite airtime used and the data traffic sent

and received.

Service Providers vary by region around the world.

To identify the correct Service Provider in your area, refer to

the Globalstar Web page: http://www.globalstar.com.

A-4

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GlobalstarBackground

Distributors and OEMs for User Terminals

Customers access the Globalstar system by means of User

Terminals, either QUALCOMM Globalstar GSP-1600

Tri-Mode Phones, or QUALCOMM Globalstar GSP-1620

Satellite Data Modems.

•

For Tri-Mode Phones, cellular and satellite

distributorships serve as retail sales conduits where

customers can purchase, provision, and repair Tri-Mode

Phones throughout the world.

•

For the GSP-1620 Satellite Data Modem, OEMs directly

integrate the modem into a market-specific product,

which is then resold to a business/industrial customer.

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RF CERTIFICATION/RESTRICTIONS

This appendix discusses certification compliance for the

QUALCOMM Globalstar GSP-1620 Satellite Data Modem as

well as restrictions relating to RF, RF exposure, and

electronic devices.

Certification

The QUALCOMM Globalstar GSP-1620 Satellite Data

Modem, antenna, and cabling as supplied by QUALCOMM

Incorporated shall be compliant with the following

International standards when configured in accordance with

the QUALCOMM recommendations. Any deviation from the

guidelines or modifications to the product performed without

the permission of QUALCOMM Incorporated will invalidate

all regulatory approvals.

Compliance to the technical requirements shall be

demonstrated with the product installed in a non-metallic

enclosure, which provides no additional shielding or RF

protection. An OEM-supplied enclosure is required to protect

the product from the effects of electrostatic discharge (ESD)

and environmental conditions that result in the product

operating within its specified range.

Compliance to the technical requirements shall be

demonstrated with the product powered by a power supply

that is compliant with the rules and regulations of the FCC

and the European Community. The OEM manufacturer is

required to provide a power supply that ensures the product

continues to meet the applicable regulatory requirements for

the specific application.

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QUALCOMM Incorporated does not accept any responsibility

for regulatory compliance of the OEM product. It is the

responsibility of the OEM manufacturer to ensure that all

regulatory requirements (e.g., FAA, Hazardous Location)

have been met for the specific application.

Federal Communications Commission (FCC)

The GSP-1620 modem configured with the QUALCOMM-

supplied antenna and RF cabling is compliant and approved

in accordance with the FCC Code of Federal Rules (CFR) 47

parts:

•

Part 1 Para 1.1310 Radio Frequency Radiation Exposure

Limits

•

Part 15 Radio Frequency Devices

Part 25 Satellite Communications

European R&TTE Directive 1999/5/EC

The GSP-1620 modem configured with the QUALCOMM-

supplied antenna and RF cabling is compliant and approved

in accordance with the essential requirements of the

European Community, under European Directive 1999/5/EC

On Radio Equipment & Telecommunications Terminal

Equipment (R&TTE Directive).

The supporting technical standards used to demonstrate

compliance are:

•

EN 300 831 Electromagnetic Compatibility

EN 301 441 (TBR 041) Essential Terminal Requirements

B-2

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RFCertification/Restrictions

RF Restrictions

The GSP-1620 modem must be used with the QUALCOMM-

provided antenna, and no modification to the RF transmit or

receive path is permitted in the form of amplifiers.

QUALCOMM Incorporated must be consulted before any

changes can be made in the RF path, including cable length

deviations from the QUALCOMM-provided or recommended

cabling. Failure to do so may result in non-compliance with

the Globalstar communications network and Government

Radio Regulations.

Radio Astronomy Zones

Radio Astronomy exclusion zones may be blacked out of

Globalstar service. The OEM manufacturer should consult

with the Globalstar Service Provider to ensure that service is

available in the location(s) of the installed OEM product.

GPS Interference Elimination

The modem antenna must be installed a minimum distance

of 30 inches from a GPS antenna to ensure compatibility

between the two satellite systems.

Radio Frequency Exposure Restrictions

The GSP-1620 modem incorporates a relatively low-power

radio transmitter, receiver, and antenna (the DRA). When it

is ON it receives and sends radio frequency (RF) signals. In

August 1996, the Federal Communications Commission

(FCC) adopted RF exposure guidelines with safety levels for

portable wireless phones and devices. Those guidelines are

consistent with the safety standards previously set by both

US and international standards bodies:

•

ANSI/IEEE C95.1-1992 Standard [American National

Standards Institute / Institute of Electrical and

Electronic Engineers]

•

NCRP Report 86 (1986) [National Council on Radiation

Protection and Measurements]

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•

ICNIRP (1996) [International Commission on

Non-Ionizing Radiation Protection]

IRPA (1991) [International Radiation Protection

Association]

The GSP-1620 modem is designed to comply with the

established ANSI, FCC, and international safety standards

for safe levels of human exposure to RF energy. Maintaining

a minimum line-of-sight separation distance of 21.5

centimeters (8.5 inches) between the transmitting antenna

and all personnel will ensure that the General

Population/Uncontrolled Exposure maximum permissible

exposure (MPE) limits are not exceeded.

This satisfies the MPE limits mandated by the FCC in 47

CFR Ch. 1 (10-1-99 Edition), Part 1, §1.1310 and defined in

the ANSI/IEEE C95.1-1992 standard, and also satisfies the

more-stringent European and international exposure limit

recommendations of IRPA (1991) and ICNIRP (1996).

The ODU antenna must be installed in a configuration that ensures a

minimum line-of-sight separation distance of 21.5 centimeters (8.5

inches) is maintained at all times between the ODU antenna and any

personnel.

Caution

Electronic Device Restrictions

Most modern electronic equipment is shielded from RF

signals. However, certain electronic equipment may not be

shielded against the RF signals from wireless phones and

modems.

Pacemakers

The Health Industry Manufacturers Association recommends

that a minimum separation distance of 15.24 centimeters (6

inches) be maintained between a handheld wireless phone

and a pacemaker to avoid potential interference with the

pacemaker.

B-4

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RFCertification/Restrictions

For a wireless modem, which has a higher power output than

a wireless phone, the distance must be increased. For a

GSP-1620 modem, a minimum separation distance of 22.67

centimeters (9 inches) should be maintained between the

transmitting modem antenna and all pacemakers. These

recommendations are consistent with the independent

research by and recommendations of Wireless Technology

Research, L.L.C.

Persons with pacemakers should follow these guidelines:

•

Always keep the modem antenna more than 22.67

centimeters (9 inches) from your pacemaker when the

modem is turned ON.

•

If you have any reason to suspect that interference is

taking place, turn your modem OFF immediately.

Hearing Aids

Some digital wireless phones and other wireless devices

(including wireless modems) may interfere with some hearing

aids. If interference occurs, you may want to consult your

Service Provider (or call the QUALCOMM Globalstar

Customer Support line to discuss alternatives).

Other Medical Devices

If you use any other personal medical device, consult the

manufacturer of your device to determine if it is adequately

shielded from external RF energy. Your physician may be

able to assist you in obtaining this information.

Do not operate your GSP-1620 modem (that is, turn your

modem OFF) in health care facilities when any regulations

posted in these areas instruct wireless phone users to do so.

Hospitals or health care facilities may be using equipment

that could be sensitive to external RF energy.

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WARRANTY

The warranty for the QUALCOMM Globalstar GSP-1620

Satellite Data Modem and GSP-1620 Modem Integrator’s Kit

(MIK) will be as provided for in the Supply Agreement.

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PRODUCT SUPPORT

This appendix provides support information for the

QUALCOMM Globalstar GSP-1620 Satellite Data Modem

hardware and software. It contains a description of the

support available from QUALCOMM Globalstar Customer

Service and how to contact the Technical Support and Order

Fulfillment teams.

QUALCOMM Globalstar Customer Service

The QUALCOMM Globalstar Customer Service Center,

located in the United States, provides skilled Technical

Support and Order Fulfillment staff to support customers

with technical issues, purchase order requests, and Return

Material Authorizations (RMA) for QUALCOMM-warranted

equipment. The QUALCOMM Customer Service Website

provides online information and forms for technical support

and RMA requests. See “Contacting QUALCOMM Customer

Service” on page D-3 for details.

Technical Support Information

QUALCOMM Customer Service Technical Support is

available 24 hours per day, every day, to provide

troubleshooting assistance for all QUALCOMM-provided

Globalstar products. Technical Support creates a case to

track each issue or request and works to provide a resolution.

For more information on technical support, refer to Data

Modem Troubleshooting information on the QUALCOMM

Customer Service Website.

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Contact Technical Support for any Satellite Data Modem

related issue, including when you need to:

•

Troubleshoot a problem.

Inquire about a software or hardware upgrade.

Report a documentation issue.

Request a Return Material Authorization (RMA).

Find out the status of a technical issue or of an RMA.

Follow a procedure that requires Technical Support

direction.

Prior to contacting Technical Support, please do the

following:

•

Repeat the steps or procedures to resolve the problem.

Check the Website and documentation for solutions.

Identify the software version and hardware version.

Document steps or procedures taken.

Prepare to describe the problem in detail.

Order Fulfillment Information

QUALCOMM Customer Service Order Fulfillment is

available between 8 a.m. and 5 p.m. Pacific Time, Monday

through Friday, for Return Material Authorization (RMA)

assistance on QUALCOMM equipment and to request a

purchase order. To repair, replace, or upgrade parts, request

an RMA from QUALCOMM. Submit RMA requests to

Technical Support to create a case to track the request.

Technical Support approves RMA requests, and Order

Fulfillment validates the warranty and processes the RMA.

For more information on the RMA process, refer to RMA

information on the QUALCOMM Customer Service Website.

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ProductSupport

Website Information

The QUALCOMM Customer Service Website is located at

http://www.gstechsupport.qualcomm.com.

Only registered customers may use the QUALCOMM

Customer Service Website. For details on registering, go to

the login page of the Website, click “Website Registration,”

then follow the instructions to become a registered user.

The QUALCOMM Globalstar Customer Service Website

provides several resources including the following:

•

Product information for the Satellite Data Modem

Frequently asked questions

Troubleshooting information

Forms for technical support requests to submit a case

electronically

•

Forms for RMA requests to submit a case electronically

Contacting QUALCOMM Customer Service

QUALCOMM Globalstar Customer Service is located in the

United States and may be contacted via the Website, phone,

email, or facsimile (FAX). Skilled staff are available to assist

with technical issues and Return Material Authorizations

(RMA) processing for QUALCOMM equipment.

Technical support personnel are available 24 hours per day,

every day. Order Fulfillment personnel are available between

8 a.m. and 5 p.m. Pacific Time, Monday through Friday, to

process RMA and purchase order requests. A case number is

assigned to track each technical issue or request.

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Contact information

•

Website

The following Website address is available to registered

users. Forms are available for submitting Technical

Support issues and RMA requests.

http://www.gstechsupport.qualcomm.com

•

Phone

+1 858 651 4911

❑

Select 1 for Globalstar Gateway Products.

❑

Select the appropriate option for RMA or Technical

Support troubleshooting assistance.

•

The following email addresses are available to registered

customers.

❑

[email protected]

Submit technical support issues and RMA requests to

this email address. Be sure to provide your name,

company, location, telephone number, description of

the problem, part information, and details about the

error messages and/or log information.

❑

[email protected]

Obtain information on the status of an existing

technical case by sending an email to this address. Be

sure to include the case number in the subject line in

the following format Case Number:12345.

❑

[email protected]

Obtain information on the status of an existing RMA

case request by sending an email to this address. Be

sure to include the case number and the RMA

number, if available, in the subject line in the

following format Case Number:12345 RMA

Number:67890.

D-4

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ProductSupport

The following email address is available to all customers.

❑

[email protected]

Obtain answers for all product information questions

by sending an email to this address.

•

Facsimile (FAX)

+1 858 651 2345

Submit technical support issues and new RMA requests

to this facsimile number. Be sure to provide your name,

company, location, telephone number, description of the

problem, part information, and details about the error

messages and/or log information.

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SPECIFICATION SUMMARY

This appendix summarizes the specifications for the

QUALCOMM Globalstar GSP-1620 Satellite Data Modem

and its Dielectric Resonator Antenna (DRA).

For further discussion of hardware issues, see Chapter 7,

Integrating GSP-1620 Modems into OEM Products.

Table E-1. Specification Summary — GSP-1620 Modem

Operating Frequencies

Transmit:

Receive:

1610-1625 MHz

2484-2499 MHz

Maximum Transmit Power

DC Input Voltage

+26 dBm EIRP (0.4 W)

+5.6 V to + 16 V

Power Consumption Estimates @ 12V Input State

Min

Typical

2.4 mW

500 mW

4.8 W

Max

6 mW

2.4 W

5.4 W

Shutdown

1.2 mW

280 mW

3.6 W

Standby

Transmit

Interfaces:

User Port

DB25 Serial RS-232 with pin-outs for data, control,

and power

Modem Antenna Connectors

TX MCX Female

RX MCX Female

Antenna Connectors

TX SMA Female

RX SMA Female

Provisioning and Software Upgrade

Modem Dimensions

DE9 Connector

190 x 75 x 17 mm (7.48 x 2.95 x 0.68 in)

Less than 180 grams (6.3 ounces)

Modem Weight

Antenna (included)

103 mm (4.1 in) diameter by 63 mm (2.5 in) tall

Estimated weight is less than 250 grams (8.8 ounces)

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Table E-1. Specification Summary — GSP-1620 Modem

Antenna Cable (not included)

Two cables required: transmit and receive

Male SMA to Male MCX

Transmit cable maximum 0.6 dB insertion loss

@ 1618 MHz

Receive cable maximum 3.0 dB insertion loss

@ 2492 MHz

Certification

FCC

Modem Environmental Conditions

Operating:

Storage:

-30 °C to +60 °C

-40 °C to +85 °C

Relative Humidity: 5% to 95% (under 40 °C)

The data modem is sensitive to very high ambient

noise levels. Steps must be taken to ensure that the

noise level at the modem does not exceed 110 dB OSPL

(Overall Sound Pressure Level).

Shock mounts must be used when the environment

includes excessive vibration. The GSP-1620 modem

will meet or exceed all operational vibration

requirements defined in Table 7-5 when E-A-R

damping feet (MF-100-UC04-H, black) are used as

shock mounts.

Antenna Environmental Conditions

Operating/Storage: -40 °C to +85 °C

Relative Humidity: 5% to 100% (under 40 °C)

Signal fading associated with trees, buildings, and

other obstacles that prevent a clear line-of-sight to the

satellite can cause degraded operation.

Any ice or freezing rain on the radome of the Outdoor

Unit (ODU) will cause degraded performance. Steps

must be taken to ensure that ice formation is kept to a

minimum on the ODU.

Supporting Products

GSP-1620 Modem Integrator’s Kit (MIK)

Globalstar User Terminal Program Support Tool

(UTPST) (modem provisioning tool)

E-2

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SpecificationSummary

Table E-2. Specification Summary — Dielectric Resonator

Antenna (DRA)

TX Specification

1610.0-1626.5

LHCP

Parameter

Frequency Range (MHz)

Polarization

RX Specification

2483.5-2500.0

LHCP

<2.0:1

VSWR (50 ohm)

<2.0:1

Isolation (TX→RX) (dB)

>40

Maximum Gain

< 6.5

–

(0°<θ<80°) (dBic) [1]

Average Gain

>1.5

>-4.0

<3.0

>1.5

(0°<θ<80°) (dBic)

(passive antenna)

Minimum Gain

>-4.0

(0°<θ<80°) (dBic)

(passive antenna)

Maximum Axial Ratio

@ zenith (dB)

<3.0

RX LNA/Filter Gain (dB)

RX Noise Figure (dB) [2]

(G/T)avg (dB/K) [3]

–

27 (typical at 25×C)

–

<2.1

> -26

–

(G/T)min (dB/K) [3]

–

> -31

RX Bias DC Voltage (V)

Rx DC Current (mA)

Power Handling (Watts)

–

+3.6

–

25 (typical)

–

Operating Temperature

(×C)

-40 to +85

Altitude (ft)

50,000

15.6

50,000

15.6

Vibration(Grms) [4]

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Table E-2. Specification Summary — Dielectric Resonator

Antenna (DRA) (continued)

TX Specification

SMA (F)

Parameter

Connector

Dimensions

Weight

RX Specification

SMA (F)

103 mm (4.1 in) diameter by 63 mm (2.5 in) tall

< 250 g (8.8 ounces)

[1] q = 0 is zenith.

[2] combined LNA and Filter over the operating temperature

[3] at Tsky = 200 K

[4] random, 3-axis, over 15 – 2000 Hz

E-4

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INDEX

mobile environment 7-27

mounting 2-10, 7-27

multiple 7-29

on flat surfaces 7-28

on poles 7-29

O-ring 2-11

Symbols

+++ escape sequence 4-5, 5-10, 5-11,

5-37, 6-40

A/ 6-19

personnel separation distance B-4

positioning outdoors 2-9, 7-27

sealing 7-28

size, weight 7-23

specifications 7-22, E-3

AC adapter 2-7, 2-12, 2-13

acknowledgment timer 6-70

acoustic noise 7-19, 7-34

acquisition 5-20, 6-61

active ports 5-9, 5-15

airtime 3-1, 5-6, A-4

alerts

ANY_MODE 6-63

API 3-7

Application Programming Interface 3-7

applications

Globalstar service 5-19, 6-61

SMS 6-57

host 5-3

modem 5-1

altitude 7-32, 7-37, E-3

ambient noise E-2

Analog Microphone Input 7-11

ANSI/IEEE C95.1-1992 Standard B-3

Answer Incoming Call 6-18

answerer 6-45

modem scenarios 5-5

SCADA 1-1, 1-3

components 5-2

developing 5-1

antenna 1-7

arbitration, port 5-9

asynchronous data

applications 5-6

cables 2-6, 7-25

calculating length 7-27

securing 7-28

character framing 6-35

caulking 2-11

configuration string 6-41

Gateway IWF commands 6-41

mobile-originated calls 5-32

mobile-terminated calls 5-33

connecting 2-9, 2-10

depiction 7-23

hardware 7-22

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overview 1-2, 5-4

using with packet data 5-34, 6-50

AT$QCPLS 5-21, 6-66

AT$QCSA 6-61

AT$QCSMSA 5-19, 6-57

AT$QCSMSI 5-19, 6-58

AT$QCSMSL 6-56

AT$QCSMSM 5-19, 6-51

AT$QCSMSP 5-18, 5-19, 6-52

AT$QCSTATUS 4-2, 4-5, 5-20, 5-26,

6-62

AT 2-17

AT command processor 5-9, 5-13

AT commands

affecting ports 5-13

alphabet 6-7

asynchronous data Gateway

IWF 6-41

example of using 4-1

AT$QCTCP 6-70

AT$QCTOD 6-64

AT$QCVJ 6-73

AT&C 5-29, 6-16

ports affected 5-14

AT&C0 5-25, 5-26

AT&D 5-15, 5-29, 6-16

ports affected 5-14

AT&D1 5-10

AT&D2 5-10, 5-15

AT&F 6-17

ports affected 5-14

resetting call mode 6-69

AT+CFG 6-41

basic 6-8

basic action 6-18

case sensitivity 6-7

command line format 6-7

configuration parameters 5-9

dormant mode 6-48

error log services 6-59

extended configuration 6-32

Globalstar S-registers 6-31

non-operational 6-6

Online-Command mode 6-40

operational 6-2

overview 6-7

prefix 6-19

protocol stack modification 6-70

quick reference tables 6-2

reference section 6-1

sample 5-36

AT+CMUX 6-32

AT+CRM 6-33

ports affected 5-15

AT+CTA 6-49

ports affected 5-15

AT+DS 6-42

service status 6-61

SMS 6-51

AT+ES 6-45

AT+GSN 6-34

AT+ICF 6-35

ports affected 5-14

AT+IFC 6-36

ports affected 5-15

AT+IPR 6-38

special calls 6-64

S-registers 6-24

syntax 6-8

AT$QCCLR 6-60

AT$QCERR 6-59

AT$QCMODE 6-69

AT$QCMSTATS 6-68

AT$QCPKND 5-34, 6-50

ports affected 5-15

Index-2

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Index

AT+IPR? 2-17

AT+MS 6-47

ATA 5-33, 6-18

ATD 5-10, 5-11, 6-20

ATD#777 4-4, 5-10, 5-11, 5-27, 5-32

ATE 6-9

AUTOMATIC 6-63

Automatic Answer 6-25

AUTORETRY 6-64

axial ratio, antenna E-3

ATH 4-5, 5-10, 5-11, 5-12, 5-25, 5-27,

5-32, 5-36, 6-22

ATH+CTA 5-25

ATH777 5-25, 5-26, 5-27

ATI 6-9

ATL 6-10

ATM 6-11

ATO 5-10, 5-13, 6-23

ATP 6-11

ATQ 6-12

ATS0 6-25

ATS10 6-30

ATS11 6-31

ATS3 6-25

ATS4 6-26

ATS5 6-27

ATS6 6-27

ATS7 6-28

backspace character 6-27

BATTERY CHARGE 4-3

battery-powered applications 5-6, 5-16,

7-7

baud rate 6-38

checking 2-16

configurable 5-13

Control port 2-15

Data port 2-15

bench setup 2-1

bent pipe transponders A-2

billing 5-6, 5-17, 5-25

records A-4

bits per second 2-15

blind dialing 6-27

booting up 7-7

BUILD 6-10

build information, modem 6-59

BUSY 5-10, 5-11, 6-22

busy signal 6-14

ATS777 6-31

ports affected 5-14

ATS8 6-29

ATS9 6-29

ATT 6-13

C programming language 5-2

cables

attenuation, by snow 7-28, 7-37

ATV 6-13

ATX 6-14

antenna 2-6, 7-25

connecting 2-4

custom 7-2

Diagnostic 2-7, 2-9

extending 2-5, 2-9

length deviations B-3

Modem Interface 2-4

ATZ 6-15

call modes 6-69

ports affected 5-14

auto-answer 5-6, 5-28, 5-29, 6-25

Autodeletion 6-54, 6-56, 6-59

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Change from Online to Online-Command

shields 7-18

suppliers 7-26

CALL

Mode 6-40

character framing 5-14, 6-35

circuit

DURATION 4-3, 6-64

NUMBER 4-3, 6-64

STATE 4-3, 6-64

108 6-19

108/2 5-12, 6-16, 6-22

109 6-16, 6-19

TYPE 4-3, 6-64

call

Circuit Card Assemblies 1-7, 7-3

Clear

Detail Record 5-25

Error Log 6-60

To Send 5-8

code samples 5-2

codeword size 6-43

Comma Dial Modifier Time 6-29

Command

history 6-21

mode, modem 6-69

Caller ID 5-28

CALLINPROG 6-64

calls

answering with Data and Control

Echo 6-9

Line Editing Character 6-27

line format 6-7

Line Termination Character 6-25

mode 5-12

ports 5-29

answering with Data port 5-28

asynchronous data 5-30

Loopback 4-3, 5-15, 6-21

Markov 4-3, 5-15, 6-21

mobile-originated

echoing 6-9

condensation 7-30

configuration

ports 5-8, 5-9

string 6-41

CONNECT 6-15, 6-19, 6-21, 6-24

connecting

asynchronous 5-32

packet data 5-27

mobile-terminated

asynchronous 5-33

packet data 5-27

packet data 4-3, 6-21

special test 5-15

antenna 2-9, 2-10

antenna cables 2-6

Diagnostic cable 2-9, 3-2

Interface cable 2-5

UTPST 3-2

carriage return 6-7

Carrier Detect Threshold Timeout 6-29

Carrier Loss to Disconnect Timeout 6-30

carrier, lost 6-29, 6-30

Connection Completion Timeout 6-28

connection time 1-2, 5-4, 5-32

connectors

carriers, Globalstar A-4

case sensitivity 6-7

caulking antenna 2-11, 7-29

CDMA by QUALCOMM 7-20

CDR, see Call Detail Record

certification compliance B-1

DB-25 7-6

digital data durability 7-34

Interface 7-9

Index-4

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Index

J3 2-6, 7-3, 7-6

J7 2-6, 7-3, 7-6

MCX 7-25

baud rate 2-17

changing configuration 7-8

HyperTerminal settings 2-15

line speed 7-6

modem 7-3

modem antenna 7-6

RF durability 7-35, 7-39

Rx 2-6, 2-9, 7-22

SMA 7-25, 7-29

making calls from 4-4

signals 7-9

transmit rate 5-22, 5-32

Data Set Read, see DSR

Data Terminal Ready, see DTR

data terminating equipment, see DTE

DB-25

cable bridle 2-4

connector 1-7, 7-6

DC POWER 2-4

DC power 2-12

Tx 2-6, 2-9, 7-22

constellation, Globalstar A-1

Control port 5-7, 7-6

active 5-10

active only 5-9

baud rate 2-17

changing configuration 7-8

HyperTerminal settings 2-15

line speed 7-6

impedance 7-15

modem requirements 7-15

oscillations 7-15

supply 2-12

signals 7-8

coverage A-2

DC/DC converter 7-15

DC_ signals 7-10

DCD 5-8, 5-29, 7-9

DCE 5-7, 5-12, 5-33, 6-1

header, trailer 6-13

CP_ signals 7-10

CTS 5-8, 7-9, 7-14

Customer Service Center D-1

Received Line Signal Detector

damping 7-20, 7-32, 7-33

Data and Control ports active 5-9

data call 4-3

Behavior 6-16

Received Signal Line Detector

Behavior 5-14

terminating from Online-Command

reset default parameters 6-15

Response Format 6-13

response format 6-13

mode 5-12

Data Carrier Detected 5-8

data communications equipment, see DCE

Data Compression Control

Command 6-42

Data port 5-7, 7-6

active 5-10

DE-9 connector 2-9, 7-12

DEEP_SLEEP 6-63

defaults

configuration 5-14

DCE factory parameters 6-15

modem 6-17

active only 5-8

answering calls 5-28

degradation of service 5-4

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developing modem applications 5-1

Diagnostic

DTE 1-5, 5-7, 6-1

Data Terminal Ready Behavior 5-14,

cable 2-7, 7-12

6-16

DTMF

connecting for UTPST 3-2

switch box 2-7, 7-12

Tone Duration and Spacing 6-31

port 2-9, 5-16, 7-12

pinouts 7-13

dial

tones 6-13, 6-31

DTR 5-8, 5-10, 5-28, 7-8, 7-14

asserted 2-7, 5-9, 5-16, 7-12

on Control port 5-29

command 6-20

string values 6-21

valid 6-20

on Data port 5-28, 5-29

on Diagnostic port 5-28

changes during operation 5-15

Control port 5-29

Data port 5-28, 5-29

DCD handshake 5-29

de-asserted 2-7, 5-9, 5-16, 7-7,

7-12, 7-18

on Data port 5-28, 5-29

Diagnostic port 5-28

hold time 7-8

modem power down 5-10

OR’d signals 7-17

tone 6-14

Dial Number 5-33, 5-35

Dial-Up Networking 5-22

dictionary entries 6-43

Dielectric Resonator Antenna, see antenna

digital

board 1-7

data connector 7-34

ground 7-18

disconnecting 6-28

distributors, User Terminal A-5

DN 5-33

DNI 7-19

DNS server 5-30

signal 7-7

durability

digital connector 7-34

RF connector 7-35, 7-39

dynamic IP addressing 5-23

dormant mode 5-5, 5-25, 5-29, 6-22,

6-23, 6-48, 6-50

idle timer 5-25, 6-49

leaving active 5-27

setting up 5-25

E-A-R damping feet 7-20, 7-32, 7-33,

E-2

echoing 6-9

timeout setting 5-15, 6-49

downconverters 1-7

DP_ signals 7-10

EIA/TIA/IS-707A 6-40

electrical shock 2-19, 7-15

electronic device restrictions B-4

EMI filtering 7-15, 7-16

DRA, see antenna

DSR 5-8, 7-8, 7-9

asserted 5-16, 7-7, 7-17

Index-6

80-99208-1 Rev. D

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Index

emissions

1605 7-29

problems 2-9

enclosures 7-19, B-1

metallic 7-18

QUALCOMM mark on 7-20

regulatory labels on 7-21

environmental specifications

antenna 7-35, E-2

Federal Communications Commission, see

FCC

filtering 7-16

firewalls 5-5

fixed IP addressing 5-23, 5-24

flash, programming 7-14

flow control 2-15

data 5-12

DCE/DTE 6-36

hardware 6-37, 7-13, 7-14

software 6-37

modem 7-30, E-2

ERROR 6-9

error

Forward Link 5-16

freezing rain 7-37

frequencies

control 6-46

log

attenuation 7-28

operating E-1

clearing 6-60

getting 6-59

frequency range, antenna E-3

full duplex 1-5, 5-16, 5-22, 5-32

fungal growth 7-35, 7-39

fuses 2-12, 7-16

services commands 6-59

Error Control Selection Command 6-45

ESD 2-2, 2-19, 7-6, 7-20

and Diagnostic port 7-13

damage to modem 7-15

ESN 6-34

GAI 5-16

ETSI 7-16

gain, antenna E-3

gas wells 5-3, 5-6

GATEWAY 4-2, 6-63

Gateways 4-2, 5-3, A-2

Home Channel 3-5

Home ID 3-5

European

R&TTE Directive B-2

Union 7-18, 7-21

extended configuration AT

commands 6-32

extending cables 2-5, 2-9

IP addressing 5-23

IWF 6-41, 6-47

factory defaults 6-15, 6-17

fades 5-19, 6-61

fallback modes 6-45

fatal error 7-9, 7-18

FCC 7-16, 7-18, 7-21, B-2

FDX 5-16

number 4-2

Packet Interworking Function 5-8

service areas 5-29, 5-35

geostationary-Earth-orbit satellites A-2

Get

Info 6-9

Modem User Terminal ESN 6-34

80-99208-1 Rev. D

Index-7

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Integrator’s Reference Manual

Globalstar

grounding 2-11

Air Interface 5-16

options 7-18

background information A-1

Communications System 1-2

coverage A-2

GSP-1600 Tri-Mode Phone A-2, A-5

LCD screen 5-20

roaming 5-35

GSP-1620 Satellite Data Modem, see

modem

guard-time 6-40

Customer Service D-1

Data User Guide 1-8

ground segment A-2

Home

Gateway Channel 3-5

Gateway ID 3-5

H777 6-22

hand-offs 5-29

handshake

Service Provider Mobile Country

Code 3-6

Service Provider Mobile Network

DTR-DCD 5-29

Code 3-6

signals 5-13

TxD/RxD 7-8

hanging up

IMSI 3-5

Limited Partnership (GLP) A-1

satellite

calls 5-27, 5-32

modem 7-7

paths 7-27

service 4-2, 5-16

system 3-1

service 4-2

hard reset 7-18

hardware

antenna 7-22

flow control 7-13, 7-14

alerts 5-19

modem 7-2

Health Industry Manufacturers

signal 4-1

specifications E-1

User Terminal 3-2

UT Program Support Tool, see UTPST

UTPST Script API Reference

Manual xxiii, 1-8, 3-7

Web page 5-26, A-4

Association B-4

hearing aids B-5

heat loads 7-31, 7-36

Home Service Provider 3-6

Hook Control 6-22

host

GLOBALSTAR service mode 6-63

GLP A-1

GND 5-8, 7-8, 7-9

GPS interference B-3

ground

application 5-3

modem 6-45

server 5-4, 5-6, 5-23, 5-24, 5-30,

5-33, 5-35

HPSE_RESUME 6-64

humidity 7-30, 7-35, E-2

loops 2-11, 7-19

segment, Globalstar A-2

signal 7-10, 7-11, 7-14

Index-8

80-99208-1 Rev. D

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Index

HyperTerminal 2-15, 5-2

checking modem status 4-2

making calls 4-4

IWF 5-8

commands 6-41

Gateway 6-41

setting up 2-15

modem 5-30, 6-14, 6-18, 6-27,

6-28, 6-29, 6-30, 6-31

modulation capabilities 6-47

ice 7-29, 7-37

ICNIRP (1996) B-4

IDLE 6-64

J3 connector 2-6, 7-3, 7-6

J7 connector 2-6, 7-3, 7-6

JPM Corporate 7-26

idle timer 5-25, 6-49

impacts 7-3

impedance 7-15

IMSI 3-5, 5-24, 5-30

in-band control data 5-12, 5-27, 5-32

INDEX, SMS 6-54

initialization strings 5-36

insertion loss 2-9

Interface connector

pinouts 7-9

jumper, shorting pins 3-8

labeling, regulatory 7-21

LAPM 6-46

latitude 5-21, 6-67, A-1

LEO satellites 1-2, 5-21, A-1

lightning 7-16

Linux 5-22

Liquid Electrical Tape 7-29

LNA 1-7, E-3

local flow control 5-15, 6-36

locked SMS messages 6-54, 6-56

long distance charges 5-4

longitude 5-21, 6-67

Loopback call 4-3, 5-10, 5-11, 6-21

DTR behavior 5-15

LOOPBACK call type 6-64

lost signaling carrier 6-29, 6-30

low-Earth-orbit (LEO) satellites A-1

LPM 6-63

interface connector

summary E-1

interference, antenna 7-29

Internet 1-4, 5-3, 5-21

Protocol, see IP

IP addressing 5-23

dynamic 5-23

fixed 5-24

globally routable addresses 5-23

private addresses 5-23

IP-in-IP tunnel 5-24

IPSec 5-24

IRPA (1991) B-4

IS-637 6-55

IS-95 ratesets 6-32

IS-95A 5-16

isolation, antenna 7-29, E-3

M3 screws 2-11, 7-19

M4 screws 2-11

Macintosh OS 5-22

80-99208-1 Rev. D

Index-9

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Integrator’s Reference Manual

Markov call 4-3, 5-10, 5-11, 6-21

DTR behavior 5-15

IWF 5-30, 6-14, 6-18, 6-27, 6-28,

6-29, 6-30, 6-31

statistics 6-68

labeling 7-21

MARKOV call type 6-64

MCC 3-5, 3-6

mechanical description 7-3

mounting 7-19

MCX connectors 1-7, 7-3, 7-6, 7-25

mechanical shock 7-34, 7-38

medical devices B-5

medium-Earth-orbit satellites A-2

MIK, see Modem Integrator’s Kit

MNC 3-5, 3-6

overview 1-2

powering off 2-18

providing power 2-12

quick tour 2-2

re-booting 7-18

resetting 2-18

Mobile

specification summary E-1

status 4-1, 6-62

Country Code 3-5

Network Code 3-5

surge protection 7-16

talking to via serial port 2-15

training time 5-4

Satellite System 5-16

mobile-originated calls

asynchronous 5-32

packet data 5-27

mobile-terminated calls

answering with SMS 5-18

upgrading software 3-7

user interface 7-6

Modem Integrator’s Kit 1-7, 2-2, 2-4

asynchronous 5-33

Modem Interface cable 2-4

packet data 5-27

Modem Operation Monitor, see Operation

Monitor

modes

MODEL 6-10

NUMBER 6-10

modem

Command 5-12

dormant 6-48

antenna connectors 7-6

modem call 6-69

Online 4-5, 5-12

Online-Command 4-5, 5-12

power 7-17

application scenarios 5-5

applications 5-1

banks 5-4

board layout 7-3

booting up 7-7, 7-17

bulk programming 3-7

dimensions, weight 7-6

distributors A-5

Modulation Selection Command 6-47

MODULE_RESET_N 7-7, 7-12

Monitor

Speaker Loudness 6-10

Speaker Mode 6-11

mounting

grounding options 7-18

hardware 7-2

host 5-4, 6-45

antennas 2-10, 7-22, 7-27

modems 7-19

Index-10

80-99208-1 Rev. D

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Index

MPE B-4

MSIN 3-5

MSS 5-16

Online mode 4-5, 5-12

entering from Online-Command

mode 5-13

returning to 6-23

Online-Command mode 4-5, 5-10, 5-11,

5-12, 6-40

multiplexing, packet data 6-32

MULTITONE 6-64

MUX 6-32

echoing 6-9

entering from Online mode 5-12

terminating data calls 5-12

operating systems 5-22

National Safe Transit Association 7-35,

7-39

NCRP Report 86 B-3

negotiation 6-43

Operation Monitor 2-4, 2-7, 7-12

Original Equipment Manufacturer, see

OEMs

originator 6-45

O-rings 2-11, 7-28

oscillations, power line 7-15

OSPL 7-20, 7-34, E-2

Outdoor Unit, see ODU

Overall Sound Pressure Level 7-20, 7-34

overhead 1-2, 5-4, 5-32

networking software 5-22

NO ANSWER 6-22

NO CARRIER 5-11, 6-19, 6-21, 6-24

NO DIALTONE 5-10, 6-21

NO_MODE 6-63

noise, ambient E-2

noise, Rx E-3

noisy lines 5-4

non-data calls 5-10

non-volatile

data, losing 7-7

memory 7-18

pacemakers B-4

packet data

calls 4-3, 6-21

using AT commands 4-4

mobile-originated calls 5-27

mobile-terminated calls 5-27

overview 1-2, 5-4

ODU 1-7, 7-22