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SAFETY INSTRUCTIONS
Safety Information for the Operator
WARNING
Do not place liquid-filled containers on
the top of the equipment.
WARNING
ELECTRICAL SHOCK HAZARD
Do not open the equipment.
Only qualified personnel
should work inside the
equipment.
Fire or electrical shock can result if a liquid
spills into the equipment.
Immediately turn off the power at the
switchboard if the equipment is emitting
smoke or fire.
Immediately turn off the power at the
switchboard if water leaks into the
equipment or something is dropped in
the equipment.
Continued use of the equipment can cause
fire or electrical shock. Contact a FURUNO
agent for service.
Continued use of the equipment can cause
fire or electrical shock. Contact a FURUNO
agent for service.
Make sure no rain or water splash leaks
into the equipment.
Do not disassemble or modify the
equipment.
Fire or electrical shock can result if water
leaks in the equipment.
Fire, electrical shock or serious injury can
result.
Keep heater away from equipment.
A heater can melt the equipment’s power
cord, which can cause fire or electrical
shock.
CAUTION
A warning label is attached to the equip-
ment. Do not remove the label. If the
label is missing or illegible, contact
a FURUNO agent or dealer.
Name: Warning Label (1)
Type: 86-003-1011-0
remove cover. No user-serviceable
Code No.: 100-236-230
WARNING
To avoid electrical shock, do not
parts inside.
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Safety Information for the Installer
WARNING
CAUTION
Ground the equipment to
prevent electrical shock and
mutual interference.
ELECTRICAL SHOCK HAZARD
Do not open the equipment
unless totally familiar with
electrical circuits and
service manual.
Observe the following compass safe
distances to prevent deviation of a
magnetic compass:
Only qualified personnel
should work inside the
equipment.
Standard Steering
Compass Compass
Turn off the power at the switchboard
before beginning the installation.
HSD
Modem
1.2 m
0.9 m
Fire or electrical shock can result if the
power is left on.
Do not install the equipment where it
may get wet from rain or water splash.
Water in the equipment can result in fire,
electrical shock or equipment damage.
Be sure that the power supply is
compatible with the voltage rating of
the equipment.
Connection of an incorrect power supply
can cause fire or equipment damage. The
voltage rating of the equipment appears
on the label above the power connector.
i
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TABLE OF CONTENTS
INTRODUCTION ................................................................................. v
EQUIPMENT LIST ............................................................................. vi
SYSTEM CONFIGURATION.............................................................viii
1. OVERVIEW
1.1 Control Description...........................................................................................................1
1.1.1 Front panel..............................................................................................................1
1.1.2 Rear panel ..............................................................................................................2
2. SETTINGS
2.1 Switch Panel Settings ......................................................................................................3
2.1.1 Data rate .................................................................................................................3
2.1.2 DIP switches ...........................................................................................................3
2.2 OID/DID and IMN Settings ...............................................................................................5
2.3 Terminal Unit Settings ......................................................................................................5
2.4 Registering, Deleting Subscriber Number........................................................................5
2.4.1 Registering subscriber number ...............................................................................6
2.4.2 Deleting subscriber number ....................................................................................6
2.4.3 Confirming subscriber number................................................................................6
2.4.4 Status display on the terminal unit..........................................................................6
3. OPERATION
3.1 Calling ..............................................................................................................................7
3.1.1 Automatic HSD call .................................................................................................7
3.1.2 Manual call..............................................................................................................8
3.2 Receiving .........................................................................................................................9
3.2.1 Automatic call mode and receiving operation .........................................................9
3.2.2 Receiving and automatic data rate switching .......................................................10
3.3 V.25bis Command, Indication ........................................................................................10
3.4 Call Sequence................................................................................................................12
3.4.1 Direct call setup sequence....................................................................................12
3.4.2 Address call setup sequence ................................................................................13
3.4.3 Manual call setup sequence .................................................................................14
3.4.4 Automatic call clear sequence ..............................................................................15
3.4.5 Call clear sequence from land ..............................................................................15
3.4.6 Manual call clear sequence ..................................................................................16
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4. MAINTENANCE & TROUBLESHOOTING
4.1 Maintenance...................................................................................................................17
4.1.1 Cleaning................................................................................................................17
4.1.2 Resetting the circuit breaker .................................................................................17
4.2 Self Test at Terminal Unit ...............................................................................................17
4.3 Troubleshooting for the User..........................................................................................18
5. INSTALLATION
5.1 Mounting ........................................................................................................................19
5.1.1 Mounting location..................................................................................................19
5.1.2 Mounting procedure ..............................................................................................19
5.2 Wiring .............................................................................................................................20
5.2.1 Wiring between HSD modem and router ..............................................................20
5.2.2 Modifying the RF CONV board in the communication unit ...................................21
5.2.3 Wiring between HSD modem and communication unit ........................................26
5.2.4 Ground ..................................................................................................................26
APPENDIX Usage Tips
Communication with other makes of Inmarsat-B terminals..................................................27
Landline................................................................................................................................27
Propagation delay ................................................................................................................27
TCP/IP protocol ....................................................................................................................27
Router setting for network connection .................................................................................27
Network configuration ..........................................................................................................28
Synchronous-asynchronous adapter ...................................................................................29
Land earth station ................................................................................................................30
SPECIFICATIONS ..................................................................................................SP-1
OUTLINE DRAWING...............................................................................................D-1
INTERCONNECTION DIAGRAM ...................................................................... S-1
SCHEMATIC DIAGRAM ........................................................................................ S-2
INDEX ......................................................................................................................Index-1
Declaration of conformity to type
iv
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INTRODUCTION
FURUNO Electric Company thanks you for selecting the IB-681 High Speed Data (HSD)
Modem. We are confident you will discover why FURUNO has become synonymous with
quality and reliability.
For over 50 years FURUNO Electric Company has enjoyed an enviable reputation for
excellent marine electronics equipment. This dedication to excellence is furthered by our
extensive global network of agents and dealers.
The IB-681 is designed and constructed to meet the rigorous demands of the marine
environment. However, no machine can perform its intended function unless properly in-
stalled and maintained. Please carefully read and follow the recommended procedures for
installation, operation and maintenance to get maximum performance from this equip-
ment.
Features
The IB-681 provides global, satellite-based high speed duplex 56 or 64 Kbps data via
ISDN. High speed data services will be useful to companies and organizations with large
amounts of data to transmit.
• Automatic, manual calling
• LEDs show equipment status
• Simple operation
• DIP switches and data rate switch set operation parameters
Notice
FURUNO will assume no responsibility
for security-related problems.
Network configuration depends on
application, number of terminals used,
shipboard network and land network.
Generally, setup is done on the user’s
equipment. For details on network setup
contact the network manager.
v
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EQUIPMENT LIST
Complete Set
Name
Type
Code No.
Qty
Remarks
HSD Modem Unit IB-681
1
For FELCOM 81 comm. unit
manufactured 7/98 and after
CP16-01601 (004-443-480)
CP16-01602 (004-442-900)
CP16-01605 (004-442-950)
CP16-01600 000-043-362
CP16-01610 000-043-361
See
installation
materials
lists below
for details.
Installation
Materials
Select
one
For FELCOM 81 comm. unit
manufactured before 7/98
CP16-01601 (004-443-480)
CP16-01602 (004-442-900)
CP16-01603 (004-443-460)
CP16-01605 (004-442-950)
Installation Materials CP16-01601
Name
Connector
Type
Code No.
000-120-946
000-141-104
000-141-465
000-141-513
000-141-514
590-300-310
000-802-084
Qty
2
17JE-23250-02 (D8C)
17JE-23370-02 (D8C)
16S0277-0
Connector
2
Connector Assy.
Cable Assy.
Cable Assy.
Copper Strap
Tapping Screw
1
BNC-P-55UX2-1000
17JE-573-2 Harness
05-003-0031
3
1
1
6X20 SUS 304
4
Installation Materials CP16-01602
Name
Connector Assy.
Cable Assy.
Type
CP16-01606
Code No.
004-442-910
000-141-558
000-141-559
000-881-445
Qty
1
PH5P-L200-SMP2P
PH2P-L300-SMR2P
M4X8
1
Cable Assy.
1
Panhead Screw
4
vi
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Installation Materials CP16-01603
Name
RF CONV Board
Rear Panel
Type
Code No.
004-441-140
100-245-695
Qty
1
16P0130
16-011-2013-5
1
Installation Materials CP16-01605
Name
Type
Code No.
004-441-500
004-441-510
Qty
Programmed ROM PROM16501051
Programmed ROM PROM16501061
1
1
Optional Equipment
Name
Type
Code No.
Qty
Remarks
17JE-573-2 Harness
(000-127-108),
BNC-P-55UX2-500
(000-141-969),
Connection Cable
Kit
CP16-19
004-447-110
1
for extension by 5 m
vii
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SYSTEM CONFIGURATION
ANTENNA
UNIT
IB-181
Antenna cable
Serial straight cable
(25 or 37 pin connector)
Coaxial cable
PC
NETWORK
ROUTER
HSD
MODEM
IB-681
COMMUNICATION
UNIT
LAN
PC
IB-281
(HSD TERMINAL)
Serial cable
(9 pin connector)
: Local supply
: FELCOM 81
viii
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1. OVERVIEW
1.1 Control Description
1.1.1 Front panel
INMARSAT-B
HIGH SPEED DATA MODEM
POWER DIMMER
ON
POWER
SYNC
TX (64K)
TX (56K)
FAIL
LED
POWER
switch
OFF
Switch panel
(cover removed)
DIMMER
control
Figure 1 IB-681, front view
POWER switch: Turns the power on/off. Flip up to turn the power on; flip down to turn the
power off. After turning on the power, all status LEDs light for about 20 seconds. Then all
LEDs except POWER go off about 10 seconds later. Turn on the IB-281 about 30 sec-
onds after turning on the IB-681, otherwise the IB-281 may display “HSD Fault.” If the FAIL
lamp on the IB-281 goes off then operation is normal.
DIMMER control: Adjusts the illumination of the status LEDs.
Switch panel: Contains eight DIP switches and the Data Rate switch which set operation
parameters. See page 3 for details.
Status LEDs: Show equipment status.
POWER: Lights when the power is turned on.
SYNC:
Lights, during HSD communications, when satellite signal becomes synchro-
nized.
TX (64K): Lights when data rate is 64 Kbps.
TX (56K): Lights when data rate is 56 Kbps.
FAIL:
Lights for communication error.
Note: TX LED on IB-281 dose not light during HSD communications.
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1.1.2 Rear panel
HSD DATA 2
HSD DATA1
TX IF RX IF
HSD DATA2
REF
HSD CTRL
HSD CTRL
HSD DATA 1
AC100-220V
BREAKER
Breaker (1A)
Earth terminal
100-220 VAC
REF
RX IF
TX IF
Figure 2 IB-681, rear view
HSD DATA 1: RS-232 interface connector
HSD DATA 2: RS-449 interface connector
HSD CTRL: Conducts control data communications between communication unit and
HSD modem.
Breaker: The red button pops out when overcurrent flows inside the equipment. In this
case, find the cause of the overcurrent and push the button.
100-220 VAC: Connection of 100/220 VAC power.
REF: Receives reference signal from the communication unit.
RX IF: Receives IF signal from the communication unit.
TX IF: Sends IF signal to the communication unit.
2
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2. SETTINGS
2.1 Switch Panel Settings
Communication parameters are set with the switches in the switch panel. Unfasten two
screws to access the switches. Note that it is not necessary to turn off the IB-681 to
access the switches.
1 2 3 4
5 6 7 8
Data Rate
64K
ON
: Factory setting
56K
Figure 3 Switch panel
2.1.1 Data rate
Set the data rate according to land line/network. The default setting is 64k (64 Kbps). 56k
is for USA ISDN circuit, for example. Data rate cannot be change after connecting with a
subscriber.
2.1.2 DIP switches
Table 1 DIP switch functions
SW No.
SW1
Function
OFF
ON
Address call
RS-232
Automatic call
Direct call
SW2
Terminal interface RS-449
Automatic data
NO
SW3
YES
rate switching
SW4
SW5
SW6
SW7
SW8
Command format HDLC
BSC
Character format
Not used
8 bit/no parity
7 bit/odd parity
Not used
Not used
SW1: Automatic call mode
OFF: Call starts with reception of DTR signal from HSD terminal.
ON: Call starts when subscriber number from the HSD terminal is loaded on the TxD line.
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SW2: Terminal interface
Interface with HSD terminal.
OFF: RS-449 (D-SUB 37 pin connector).
ON: RS-232 (D-SUB 25 pin connector).
SW3: Automatic data rate switching
Determines whether to receive data at data rate other than what is set with the Data Rate
switch in the switch panel.
OFF: Prevents reception of data received at data rate other than which is set with the data
rate switch.
ON: Enables reception of data received at data rate other than which is set with the data
rate switch.
SW4: Command format
Sets command format to the HSD modem, and is only effective when SW1 is set for
address call (ON). Set according to specification of HSD terminal.
OFF: HDLC format
ON: BSC format
HDLC command format
Flag
Addr
Control
Command/Indication
b0 b1 · · · · · b7
FCS
Flag
Flag: Flag
0
1
1
1 1 1 1 1 1 0
1 1 1 1 1 1 1
1 0 0 1 0 0 0
Address: Address Field
Control: Control Field
FCS: Frame Check Sequence
Parity added only to command, indication. (b0) sent first along signal wire.
BSC command format
SYN
SYN
SYN
STX
Command, Indication
ETX
SYN: 16H
STX: 02H
ETX: 03H
Three SYN sent from HSD terminal to
HSD modem. However, only two SYN are
necessary between the HSD modem and
the HSD terminal.
Parity is also added to these control characters. LSB is first sent along the signal line.
SW5: Character format
Sets character format to the HSD modem, and is only effective when SW1 is set for ad-
dress call (ON). Set according to specification of HSD terminal.
OFF: 8 bit, no parity
ON: 7 bit, even, odd parity
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2.2 OID/DID and IMN Settings
OID/DID and IMN are set on the communication unit, usually at the time of installation.
The telephone for HSD calling is alos set by the installing technician. For more informa-
tion, contact a FURUNO dealer or agent.
2.3 Terminal Unit Settings
“9: HSD” is added to the Terminal Setup menu on the terminal unit. Additionally, the HSD
is provided with the lock switch function, which you may set it as shown below.
Press [2], [Enter].
[Terminal setup]
1: Tel No.1
2: Tel No.2
3: Tel No.3
4: Tel No.4
5: Tel No.5
6: Tel No.6
E: Exit
7: Data
8: Telex
9: HSD
Enter JOB No. 9
Press [9], [2].
[HSD]
Key Lock: Ignore/Valid
Ignore: Lock switch setting ignored;
receive capability.
Valid: Lock switch setting followed;
cannot transmit when lock
switch is in "disable" position.
Figure 4 Terminal setup menu
5
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2.4 Registering, Deleting Subscriber Number
2.4.1 Registering subscriber number
Register subscriber number as follows with the No.1 telephone. The subscriber number
may contain 20 digits (*, # cannot be registered). The number can be confirmed by printing
the status display.
1. Pick up the handset of the No.1 telephone and confirm dial tone.
2. Dial subscriber’s no. as follows:
* 5 1 * a a a 0 0 b b x x x x x x x x x #
Subscriber’s Number
Country Code
Automatic Dialing
Land Earth Station (LES)
Prefix (64k) for HSD call
3. Confirm dial tone (See table 2).
2.4.2 Deleting subscriber number
1. Dial * 5 1 * #.
2.4.3 Confirming subscriber number
HSD communications settings (HSD settings input to the communcation unit) are con-
tained on the status monitor which can be printed from the No.1 telephone.
1. Pick up the handset of the No. 1 telephone.
2. Dial * 9 6 # to print the status monitor.
.
.
.
Prefix Code:
HSD Destination: XXXXXXXXXXXXXXX
2.4.4 Status display on the terminal unit
The status display shows HSD state. You can print it from the terminal unit. Sample HSD
status indications are as below.
RX Signal Level (HSD) ...
RX IF AGC Level (HSD) ...
2nd Local (HSD) ...
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3. OPERATION
3.1 Calling
An HSD call may be made automatically or manually.
3.1.1 Automatic HSD call
All automatic HSD calls are carried and terminated from the HSD terminal. Automatic
HSD calls begin when the DTE raises the DTR line in the serial connector. The Inmarsat
terminal dials the pre-programmed number. Upon answer by the called system the HSD
port is enabled and data transfer can take place.
Automatic HSD calls fall into two categories: direct call and address call. The category
may be selected with DIP switch SW1: turn off the switch (default setting) for direct call;
turn on the switch for address call. See page 3 for DIP switch setting.
Direct call setup
• Program subscriber number. See page 5.
• Turn off DIP switch SW1.
The subscriber is called when the HSD terminal turns on the DTR signal.
Address call setup
• See page 13 for sequence.
• Turn on DIP switch SW1.
The HSD terminal must support address calls. The HSD terminal outputs the following
command to the HSD modem in the format set by DIP switch SW4 and SW5:
CRN x x x x x (V.25bis command; x x x x x = subscriber number)
For further details about the CRN command, see page 10.
Note : If personal computer cannot call by user’s application having V.25 bis terminal
interface, call by DTR dailing (Direct call).
Clearing automatic HSD call
An automatic HSD call is cleared when the DTR signal is received from the HSD termi-
nal.
The HSD terminal turns off DTR, then the automatic call is cleared.
HSD terminal sends clear signal to CES, then the HSD modem turns off DCD and CTS.
Finally, the HSD modem turns off DSR.
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3.1.2 Manual call
Manual calls are made with a telephone (designated at installation) connected to the com-
munication unit. The HSD terminal must support manual calls.
To make a manual call, turn off DIP switch SW1, and then dial subscriber number as
follows:
* 5 5 *
or
* 5 6 * a a a 0 0 b b x x x x x x x x x #
Subscriber’s Number
Country Code
Automatic Dialing
Land Earth Station (LES)
Prefix for HSD Call
55: 56 Kbps
56: 64 Kpbs
Upon answer by the called system the HSD port is enabled and data transfer can take
place. After the number is dialed listen for progress tone to confirm call. See the table
below. When you hear the “HSD call successful” tone hang up the handset.
Table 2 Progress tones
ON, OFF
Interval
Tone Name
Frequency
HSD call successful 600 Hz
1 sec, 0.5 sec
0.5 sec, 0.5 sec
HSD call failure
425 Hz
425 Hz
Manual HSD call
cleared/called no.
accepted
1 sec, 0.5 sec
Manual HSD call
cleared/called no.
not accepted
425 Hz
0.5 sec, 0.5 sec
Clearing manual call
Dial * 5 9 #.
8
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3.2 Receiving
Certain HSD terminals cannot receive the RI signal and therefore cannot receive.
3.2.1 Automatic call mode and receiving operation
Receiving processing depends on the setting of DIP switch SW1 as follows:
SW1 State
Remarks
The HSD terminal uses the DTR signal to reply. To do this the
HSD terminal keeps the DTR signal OFF when it is not
communicating. When a call arrives, the HSD modem turns on
the RI signal, the HSD terminal detects the RI signal and then
turns on the DTR signal. Then, the HSD modem turns off RI and
then turns on DSR, CTS, DCD to communicate over land line.
OFF (direct call)
The HSD terminal does not reply to an address call with the
DTR signal; the DTR signal is used to show if the HSD terminal
can send control commands to the HSD modem. When a call
arrives, the method by which the HSD terminal replies depends
on DTR status as below.
ON (address call)
Address call and DTR ON
When a call arrives, the HSD modem turns RI ON and then acknowledges reception by
sending INC to the HSD terminal. (See page 10.) Five seconds after sending INC receiv-
ing processing is initiated. When processing is completed, RI goes OFF and DSR, CTS,
DCD go ON to communicate over land line.
If the HSD terminal sends the DIC command to the HSD modem, the HSD modem does
not initiate receiving processing. This happens in the following instances:
• Overlapping calls (receiving processing cancelled)
• Processing initiated within five seconds after INC is received
If this occurs while the call is being relayed, the CIC command is sent and the HSD mo-
dem reinitiates processing.
Address call and DTR OFF
When a call arrives, the HSD modem turns RI ON. This tells the HSD terminal to turn on
the DTR signal, which causes the HSD modem to send the INC (indication) signal to the
HSD terminal to indicate it is receiving. The HSD terminal then sends the CIC command to
the HSD modem which initiates receiving processing. When processing is completed, RI
goes OFF and DSR, CTS, DCD go ON to communicate over land line.
When DIC is sent by the HSD terminal instead of CIC, the HSD modem sends the indica-
tion VAL. In this case processing is not started. Furthermore, when the CRN command or
other three-character command is sent the HSD modem sends the indication INV.
9
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3.2.2 Receiving and automatic data rate switching
A call arrives at the data rate set on a subscriber’s equipment, and the setting of DIP
Switch SW3 determines if the call will be received or not when the data rate is different
from that set on the IB-681.
SW3 State
Remarks
HSD call not accepted when its data rate is different from that
OFF: No automatic set on the IB-681.
data rate switching Use this setting when the synchro clock to the HSD terminal
cannot automatically be changed to match data rate.
HSD call accepted regardless of data rate. For example, if the
Rate switch is set to 64 K and a call's rate is 56 K, the call is
transmitted at 56 K. The synchro clock signal to the HSD
terminal is also automatically changed to 56 K.
rate switching
ON: Automatic data
Note: The HSD terminal is required to automatically synchronize
to varied clock signal.
3.3 V.25bis Command, Indication
For automatic calling, the HSD terminal directs the HSD modem with commands. Addi-
tionally the HSD modem directs the HSD terminal with indications. These commands and
indications are as below.
Commands
Command
CRNxx ⋅ ⋅
DIC
Name
Description
x
Call Request Number
Disable Incoming Call
Connect Incoming Call
Transmit a call
Prevents automatic reply.
Allows automatic reply.
CIC
Consecutive commands cannot be accepted. Commands use IA5 characters. Upper case
or lower case may be input, but case cannot be mixed.
Indications
Indication
INC
Name
Incoming Call
Invalid
Description
Call has arrived.
INV
Error in command from terminal.
VAL
CFIxx
Valid
Accept command from terminal.
Call Failed
"Call failed reply" (and reason) in response to CRN
Indications are done with IA5 characters, in upper case only.
10
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Command description
Command
Description
Subscriber number specified and called.
xx ⋅ ⋅ x Subscriber number (20 digits max.)
Useable characters: "0-9", " " (space), "-", "#"
" " and "-" can be used to separate digits for clarity; they are not recognized as
part of subscriber's number.
"#" is recognized as end code (input is not mandatory).
" ", "-" and "#" are not sent to CU.
CRNxx ⋅ ⋅
x
Examples:
CRN0030081123456789 (Subscriber's number is 003081123456789)
CRN0030081-12-345-6789 (Same number as above except "-" inserted for
clarity)
CRN0030081 12-345-6789# (Same number as first number above except " ", "-"
inserted for clarity and " #" inserted to show end of
number)
DIC
CIC
Prevents automatic reply to received calls.
Allows automatic reply to received calls.
Indication description
Indication
Description
INC
INV
VAL
Informs DTE of incoming call
Informs of invalid command from terminal.
Informs of valid command from terminal.
Informs of "Call failed reply" in response to CRN command.
xx (reason) ET: Subscriber is busy.
CFIxx
CB: Telephone/fax busy (CU is busy).
RT: Subscriber's DTE is not answering (subscriber not connected).
AB: Subscriber not replying ("Scr Vec Ack" not received).
11
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3.4 Call Sequence
3.4.1 Direct call setup sequence
CES
NCS
FELCOM
Calling operation
(DTR ON)
Access req. SU
SES RQ
CESI
Ch. assignment req. SU
NCSI
Channal assignment SU
NCSA
Service addr. SU
HSUB
scr. vec. advise SU
HSUB
Scr. vec. ack SU
Ret. carrier ID SU
HSUB
Call to
subscriber
Fill in SU
Reply from
subscriber
HSUB
CES connect SU
HSUB
HSUB
SES connect SU
DSR ON
CTS/DCD ON
Figure 5 Direct call setup sequence
12
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3.4.2 Address call setup sequence
CES
NCS
FELCOM
Calling operation
(DTR ON)
CTS/DSR ON
SES RQ
"CRNxx .. x"
Access req. SU
CESI
Ch. assignment req. SU
NCSI
Channal assignment SU
NCSA
Service addr. SU
HSUB
scr. vec. advise SU
HSUB
Scr. vec. ack SU
Ret. carrier ID SU
HSUB
Call to
subscriber
Fill in SU
Reply from
subscriber
HSUB
CES connect SU
HSUB
SES connect SU
CTS OFF
HSUB
CTS/DCD ON
Figure 6 Address call setup sequence
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3.4.3 Manual call setup sequence
CES
NCS
FELCOM
Calling operation
(dialing)
Access req. SU
SES RQ
CESI
Ch. assignment req. SU
NCSI
Channal assignment SU
NCSA
Service addr. SU
HSUB
scr. vec. advise SU
HSUB
Scr. vec. ack SU
RI ON
Ret. carrier ID SU
HSUB
OFF HOOK
(DTR ON)
Call to
subscriber
Fill in SU
Reply from
subscriber
RI OFF
HSUB
CES connect
HSUB
SES connect SU
DSR ON
HSUB
CTS/DCD ON
Figure 7 Manual call setup sequence
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3.4.4 Automatic call clear sequence
An automatic call is cleared when the DTR signal is received from the HSD terminal.
The HSD terminal turns off DTR, then the automatic call is cleared.
The HSD terminal sends clear signal to CES, then HSD modem turns off DCD and
CTS. Finally HSD modem turns off DSR.
CES
NCS
FELCOM
DTR OFF
Ch. release SU
10 times
HSUB
Disconnect
DCD CTS OFF
DSR OFF
CESI
Ch. release SU
Figure 8 Automatic call clear sequence
3.4.5 Call clear sequence from land
Land clears automatic call, then CES sends clear signal. The HSD modem turns off DCD
and CTS. Finally, the HSD modem turns off DSR, and the HSD terminal turns off DTR.
CES
NCS
FELCOM
Disconnect
from land
Max. 2 min
delay
Ch. release SU
HSUB
HSUB
Ch. release SU
10 times
DCD CTS OFF
CESI
DSR OFF
DTR OFF
Ch. release SU
Figure 9 Call clear sequence from land
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3.4.6 Manual call clear sequence
CES
NCS
FELCOM
OFF HOOK
Ch. release SU
10 times
HSUB
Disconnect
DCD CTS OFF
DSR OFF
DTR OFF
CESI
Ch. release SU
Figure 10 Manual call clear sequence
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4. MAINTENANCE & TROUBLESHOOTING
WARNING
ELECTRICAL SHOCK HAZARD
Do not open the equipment
unless totally familiar with
electrical circuits and
service manual.
Only qualified personnel
should work inside the
equipment.
4.1 Maintenance
4.1.1 Cleaning
Dust or dirt on the equipment may be removed with a soft, dry cloth. Do not use commer-
cial or chemical cleaners to clean the unit; they can remove paint and markings.
4.1.2 Resetting the circuit breaker
The BREAKER button on the rear panel pops out when the voltage input to the equipment
exceeds the voltage rating. In this case, reset the power and press the button to restore
normal operation.
4.2 Self Test at Terminal Unit
1. At the standby display, press [F4], [6], [5] and [Enter] to display program nos. of de-
vices. If the IB-681 is powered off or is not connected, *CONNECT ERROR* appears
in the HSD MODEM field.
[Self test]
<<Program No.>>
CPU1 (Tx)
165-0104-1**
165-0105-1**
165-0102-1**
165-0096-x**
165-0133-1**
(Rx) 165-0103-1**
(I/O) 165-0108-1**
CPU2 (SYS CPU)
ANTENNA
VOICE CODEC
HSD MODEM (CPU)
(DEMOD)165-0134-1**
(DECODE) 165-0135-1**
Start Selftest OK? (Y/N) Y
** Program No.
Figure 11 Program no. display
2. Press [Y] and [Enter] to test.
17
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- Test Result -
CPU1
CPU2
: ROM-OK
RAM-OK
RAM-OK
RAM-OK
SYNC-OK
DPRAM-OK
: ROM-OK
DPRAM-OK
: ROM-OK
: OK
VITERBI-OK
EEPROM-OK
ANTENNA
DEMOD
VOICE CODEC: OK
HSD MODEM : CPU-OK
DEMOD-OK
DECODE-OK
<<Press any key>>
Figure 12 Self test results
4.3 Troubleshooting for the User
The table below provides simple troubleshooting procedures which the user may follow to
restore normal operation.
Table 3 Troubleshooting table
If...
Then...
General
• check satellite line and LES line.
• check land line, land line network.
• traffic on land network may be heavy.
• gateway or server problem on land line.
• network protocol cannot pass through line to Inmarsat.
• ask subscriber to check his equipment.
• check that, in an address call, character format is compatible
with HSD terminal and HSD modem.
• check HSD terminal for proper setting.
• problem may lie with network to which the HSD modem is
connected.
HSD communications not
possible
• check communication unit/antenna (antenna tracking problem,
incorrect OID/DID, cabling on HSD modem).
• check HSD modem (check that HSD modem is on, check
cabling to HSD terminal).
Calling
• check if automatic data rate switching is OFF.
Cannot call manually
(Manual transmission is not possible when the Data Rate switch
setting and data rate of received call are different.)
• check that subscriber no. is correct.
• subscriber may be busy. Try again later.
Cannot call automatically
Receiving
• check if automatic data rate switching is OFF.
Cannot receive
(Manual transmission is not possible when the Data Rate switch
setting and data rate of received call are different.)
• check "receive" settings on HSD modem, HSD terminal.
• HSD terminal may not support certain connections.
HSD terminal does not reply
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5. INSTALLATION
WARNING
ELECTRICAL SHOCK HAZARD
Do not open the equipment
unless totally familiar with
electrical circuits and
service manual.
Only qualified personnel
should work inside the
equipment.
5.1 Mounting
5.1.1 Mounting location
The mounting location should satisfy the following requirements:
• The mounting location should be clean, moderate in temperature and humidity and well
ventilated.
• Be sure to leave sufficient space around the unit for maintenance and checking.
• A magnetic compass will be affected if placed to close to the IB-681. Observe the fol-
lowing compass safe distances to prevent deviation of a magnetic compass: Standard
compass, 1.2 m, Steering compass, 0.9 m.
• Keep the unit out of direct sunlight because of heat that can build up inside the cabinet.
5.1.2 Mounting procedure
The unit can be mounted on a tabletop. Fix the unit to the chosen location with 6x20
tapping screws (supplied). For added support, used M6 bolts (local supply) instead of the
tapping screws.
Note: Do not place the unit atop the terminal unit of the FELCOM 81.
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5.2 Wiring
5.2.1 Wiring between HSD modem and router
A serial straight cable with a 25 pin connector (RS-232 interface) or 37 pin connector (RS-
449 interface) connects between the IB-681 and HSD terminal (ex. Router) as shown
below. The interface to use is selected with DIP switch SW2. For the RS-232 interface, the
length of the cable must not exceed 15 meters. If a longer cable is required use the RS-
449 interface instead. Only one HSD Terminal (Router) can be connected.
(RS-232)
HSD DATA 1
HSD
TERMINAL
ex.
Router
HSD
MODEM
IB-680
To comm. unit
HSD DATA 2
(RS-449)
Serial straight cable
RS-232 interface: 25 pin connector
RS-449 interface: 37 pin connector
Figure 13 Connection of HSD modem and HSD terminal
RS-232 interface description
RS-232
Signal
CCITT
Circuit
Pin No.
Signal Description
DCE-DTE
←
→
←
→
→
–
2
3
TD
RD
103
104
105
106
107
102
109
114
115
108
125
Transmitted Data
Received Data
4
RTS
CTS
DSR
SG
Request to Send
Clear to Send
5
6
Data Set Ready
Signal Ground
7
→
→
→
←
→
8
DCD
TC
Receive Signal Indicator
Transmit Clock
15
17
20
22
RC
Receive Clock
Pin (male) arrangement
DTR
RI
Data Terminal Ready
Ring Indicator
Pin nos. 1, 9-14, 16, 18-19, 21, 23-25 are not used.
Figure 14 RS-232 Interface
Note: The HSD modem uses synchronous serial communication, therefore the HSD ter-
minal (PC, etc.) cannot be directly connected unless it has a synchronous serial port.
RS-449 interface description
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CCITT
Circuit
Pin No. RS-449 Signal
Signal Description
DCE-DTE
←
→
→
←
→
→
→
←
→
→
–
4/22
5/23
6/24
7/25
8/26
9/27
11/29
12/30
13/31
15
SD
SCT
RD
103
114
104
105
115
106
107
108
109
125
102
Send Data
Send Timing
Receive Data
RTS
SCR
CTS
DSR
DTR
DCD
IC
Request to Send
Receive Timing
Clear to Send
Data Set Ready
Data Terminal Ready
Receiver Ready
Incoming Call
19
SG
Signal Ground
Pin (male) arrangement
Pin nos. 1-3, 10, 14, 16-18, 20-21, 28, 32-37 are not used.
Figure 15 RS-449 Interface
Fabrication of plug case assy.
Aluminum tape
Fold back braided shield
onto cable; tape shield
as shown.
Cable Clamp
Cable
Figure 16 Fabrication of plug case (same procedure for 25 pin, 37 pin)
5.2.2 Modifying the RF CONV board in the communication unit
1. Turn off the communication unit.
2. Detach the cover.
3. Replace the RF CONV Board as follows if it is version -4 or below.
a) Unfasten the coaxial connector nut.
b) Unplug all connectors from the RF CONV Board.
c) Dismount the RF CONV Board.
d) Mount the new RF CONV Board, plug in connectors to the board, and fasten the
coaxial connector nut.
e) For the new RF CONV Board, set R135 according to antenna cable length as shown
in the table below. See Figure 19 for the location of R135.
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Antenna cable
length
Position of R135
10 to 40 m
Marked position (default position)
More than 40 m Fully clockwise (max. output power)
4. Remove the CPU2 Board from the communication unit. See Figure 19 for location.
5. Replace the ROMs (I/O CPU and SYS CPU) on the CPU2 Board. See Figure 17 for
location. Mount the CPU2 Board.
CPU2 BOARD 16P0133
U65
SYS CPU
U5
16501-05-110
U67
I/O CPU
16501-06-106
DIP SW S1
U37
U8
U55
U56
JP2
BT1
C75
Figure 17 CPU2 Board
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6. Version -1 of the CPU 2 Board, solder a harness of cable assy. (supplied) to the loca-
tion shown in the illustration below. Connect other side of cable assy. to J10 on the RF
CONV board.
CPU2 BOARD 16P0133
U65
U5
U67
DIP SW S1
GND
U37
HSD ON
U8
7
U55
U56
JP2
12
BT1
Part side
C75
RF CONV Board
CPU2 Board
PH5P
J10
U567
U55
4
1
1
2
12
Cable assy.
Figure 18 CPU 2 Board Version 1
7. For version -2 and after of the CPU2 Board, connect the cable assy. (supplied) between
J7 on the CPU2 Board and J10 on the RF CONV Board.
CPU2 Board
Cable assy.
RF CONV Board CPU2 Board
J7
J10 (PH2P)
1GND
2HSD ON
J7 (PH5P)
1P20 (HSD ON)
2P21
POWER
3P23
4GND
5
R135
J10
IN
M
ARS
AT-B
MOBILE EARTH STATION
OM
PASS
LOCK
EARING
LEV
ATION
A
OR-WES
T
Marked
point
LEVEL
A
OR
-
EAST
P
OR
EL
1
I
OR
EL
2
EL
3
Y
EL
4
X
EL
5
AIL
EL
6
EL
X
ATA
RF CONV Board
Figure 19 Communication unit, cover removed, right side view
8. Replace the rear panel for the communication unit manufactured before 7/98.
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9. Detach all connectors from the rear panel; dismount the power supply unit and the rear
panel.
10.For the unit manufactured before 7/98, detach the dummy plate from the rear panel
and fasten the connector assy. (supplied) to the rear panel with the screws used to fix
the dummy plate. For the unit manufactured after 7/98 use the screws supplied to
attach the connector assy. to the rear panel.
Connector assy.
DGPS OUT
Rear panel of communication unit
TX IF
Detach dummy
RX IF
plate and fasten
connector fixing
plate with screws
used to fasten
dummy plate.
REF
Dummy plate
HSD CTRL
Figure 20 Mounting of connector assy.
11.For version -2 or higher of the REAR PANEL Board.
Connect the HSD CTRL connector from the connector assy. to J15 on the REAR
PANEL Board.
REAR PANEL Board,
front view
REAR PANEL
Board
HSD CTRL
J15
Connector
assy.
RF CONV
Board
POWER
HSD CTRL
1 NC
2 RD
J15
IN
M
ARS
AT-B
1 RD
2 TD
MOBILE EARTH STATION
R
3 TD
4 NC
5 GND
6 - 9 NC
3 GND
C
OMPASS
EARING
LEV
LOCK
B
ATION
OR-WES
T
OR
-
EAS
T
OR
T
EL
I
OR
T
EL
T
EL
EAD
Y
T
X
T
AIL
T
T
X
D
Figure 21 Communication unit, rear view, rear panel removed
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For version -1 of the REAR PANEL Board.
Detach the REAR PANEL Board. Solder the HSD CTRL connector to the following
points on the REAR PANEL Board.
REAR PANEL CONNECTOR ASSY.
5 GND
J2
32
31
39
(D-sub 9 pin)
3 TD
RD
TD
GND
2
3
5
2 RD
Figure 22 REAR PANEL Board
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12. Attach the rear panel and mount the power supply unit.
13.Connect the four plugs from the connector fixing plate to the RF CONV Board as shown
in Figure 23.
Connector
assy.
RF CONV
Board
TX IF
RX IF
REF
(DGPS
OUT)
J9
J7
J8
(J11)
POWER
J11
IN
M
ARS
AT-B
MOBILE EARTH STATION
J9
R
J7
J8
C
OMPASS
EARING
LEV
LOCK
B
ATION
A
OR-WES
T
A
OR
-
EAS
T
P
OR
T
EL
1
I
OR
T
EL
2
T
EL
3
R
Y
T
4
T
X
T
5
F
T
6
T
X
DATA
RF CONV Board
Figure 23 Communication unit, right side view
14. Attach the cover.
15. Plug in all connectors to the rear panel.
5.2.3 Wiring between HSD modem and communication unit
1. Connect the communication unit to the IB-681 with three coaxial cables (TX IF, RX IF,
REF connectors) and one serial cable with 9 pin connector (HSD CTRL connector).
Coaxial cable (Max. 5 m, BNC-P-55UX2)
TX IF
RX IF
REF
TX IF
RX IF
REF
HSD
MODEM
IB-681
16S0277
Ship’s
mains
COMMUNICATION
UNIT IB-281
HSD CTRL
HSD CTRL
Serial cable (Max. 5 m, 17JE-573-2 harness)
Figure 24 Connection of IB-681 and communication unit
5.2.4 Ground
CAUTION
Ground the equipment to
prevent electrical shock
and mutual interference.
Connect the copper strap (supplied) between
the earth terminal on the IB-681 and ship’s
superstructure.
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APPENDIX Usage Tips
Communication with other makes of Inmarsat-B terminals
HSD communications time may increase depending on communications content when
the HSD modem is used in a network. In this case, normal telephone and fax communica-
tions are disabled (except distress), thus frequency of communications and communica-
tions time must be carefully considered when drawing up communications plans. If
communications overlap one another, it may be necessary to install an additional MES.
Landline
Most landlines use ISDN circuits, and rules of operation vary with country. Thus several
ISDN terminals may be necessary.
Circuit delay
It takes about 15~20 sesconds for an HSD call to reach land terminal once the call is
initialed by an MES.
Propagation delay
A delay of about 15-20 seconds occurs on transmission of file from HSD terminal to
coast earth station.
A delay of 240 msec exists on the satellite circuit line between the MES and coast earth
station. A 100 msec delay occurs in Tx processing and Rx processing in the IB-681.
Furthermore, a propagation delay may occur on the landline between the land terminal
and coast earth station depending on the distance between them.
TCP/IP protocol
• When throughput is slow due to propagation delay, enlarge the size of the TCP window
to compensate for the delay. TCP size setting depends on protocol stack and OS. Con-
sult respective operator’s manual for advice.
• When using a remote router, raising the communications cue (buffer) setting can speed
up throughput time. However, in some cases it may be necessary for the ship and land
terminals to have the same router. Some routers cannot be used for Inmarsat HSD
communications, especially those which cannot accommodate circuits which have large
propagation delay. Consult with router maker and dealer to determine suitable router.
• For further details consult the network manager.
Router setting for network connection
Type
Manufacturer
HSD
MODEM
IB-681
Router
CISCO 1601
CISCO SYSTEMS
10BASE-T
Router
CISCO 1601
to LAN
To comm. unit
Example:
HSD DATA 2
IOS soft SFC1601C11.33 CISCO SYSTEMS
Cable CAB449MT CISCO SYSTEMS
RS-449
Figure 24Sample of connection
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Set subscriber number at the FELCOM *51* ...#
cisco1601#sh conf
version 11.3
service udp-small-servers
service tcp-small-servers
!
hostname cisco1601
!
enable password *****
!
username land-term password 0 *****
!
interface Ethernet0
ip address 192.168.2.1 255.255.255.0
!
interface Serial0
ip address 192.168.10.10 255.255.255.0
encapsulation ppp
no keepalive
dialer dtr
dialer-group 1
ppp authentication chap
!
ip classless
ip route 0.0.0.0 0.0.0.0 192.168.10.1
ip route 192.168.0.0 255.255.255.0 192.168.10.1
ip route 192.168.1.0 255.255.255.0 192.168.10.1
dialer-list 1 protocol ip permit
snmp-server community public R0
!
line con 0
exec-timeout 0 0
line vty 0 4
password *****
login
!
end
cisco1601#
This example shows only the minimum necessary settings for confirmation. Further
details can be obtained from a Cisco dealer or Cisco’s home page (http://
www.cisco.com).
For other router see its operator’s manual.
Network configuration
• Network configuration depends on application and number of terminals used. Gener-
ally, setup is done on the user’s equipment.
• Setup depends on shipboard network and land network. For details contact the net-
work manager.
• We recommend that identification be exchanged between sender and receiver. Where
required used packet filtering and firewall.
• FURUNO will assume no responsibility for security-related problems.
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Syuchronous -asynchronous adapter
This section discusses some of the synchronous -asynchronous adapters currently avail-
able. Connecting a single PC as in the figures below you can connect to a subscriber
much easier than by using a Dial -up Router.
These devices have been tested by FURUNO.
KlasHopper PCMCIA400 (Klas Ltd., lreland)
PC
PPP supported
HSD
FELCOM81
Terminal
KlasHopper
TA/Router
modem
[Landline]
• Drive software required to use the equipment.
• PPP (Point-to- Protocol) supported. Therefore, KlasHopper is not required at receiving
end. You can connect to an internet service provider with an ordinary modem or termi-
nal adapter.
• No limitations to software usage (Web Browser, E-mail, etc.)
RAMSAT RVH24(ODC-Caltronic A/S, Denmark)
TA
PC
HSD
modem
(Synchronous
Serial port)
FELCOM
81
Terminal
RAMSAT
[Landline]
RAMSAT
• No driver software required. However, modem data files are provided to permit the
RAMSAT to function as an external modem.
• RAMSAT required by both sender and receiver .
NOTE : RAMSAT may introduce a converter which supports PPP. Then, its
function may be similar to the KlasHopper.
• File transfer software which provides simultaneous transmission and reception of files
is optionally available. However this software has not been tested by FURUNO.
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Land Earth Station
INMARSAT-B LES
STATUS TO 31st August
1999
BV - B Voice; BF - B Fax; BT - B Telex,
BD - B Data; BHSD - B High Speed Data
OCEAN
LES ACCESS
CODE
LES NAME
REGION
LES PROVIDER
France Telecom
STATUS
AOR-E
AOR-E
AOR-E
AOR-E
AOR-E
AOR-E
AOR-E
AOR-E
AOR-E
AOR-E
AOR-E
AOR-E
AOR-E
AOR-E
AOR-E
AOR-E
AOR-E
AOR-E
AOR-E
AOR-E
Ausguel
011
868
012
004
555
002
118
007
025
003
006
013
015
111
210
001
016
222
005
306
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV, BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV, BF, BT, BD, BHSD
BV, BF, BT, BD, pending RCC info
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV, BF, BT, BD, pending results
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD, pending results
BV. BF, BT, BD, BHSD
Beijing
Southbury
Marine
at Beijing
Marine
&
Navigation
Burum
Eik
PTT Telecom
Telenor
Fucino
Goonhilly
Telecom Italia
BT
Hong Kong at
Laurentides
HKT
Indot at Laurentides
Jeddah
Indot
Ministry of PTT
KDD
KDD at Burum
Korea Telecom at
Laurentides
Korea Telecom
Stratos Mobile Networks
Morsviazsputnik
DeTeMobil
Singapore Telecom
CMC
Laurentides
Morsviazsputnik at
Laurentides
Raisting
Singapore Telecom at
Ausguel
Southbury
Pry
Telekomunikacja Polska
Telstra
Telstra at Laurentides
Thermoplyae
VSNL at Southbury
OTE
VSNL
AOR-W Ausguel
France Telecom
011
868
012
111
004
002
BV. BF, BT, BD, BHSD,
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD,
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD,
BV, BF, BT, BD, BHSD, ,
Beijing Marine at
Southbury
Beijing Marine &
Navigation
AOR-W
AOR-W Burum
PTT Telecom
DeTeMobil
Telenor
AOR-W DeTeMobil at Ausguel
AOR-W Eik
AOR-W Goonhilly
BT
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Hong Kong at
Laurentides
AOR-W
HKT
118
007
003
006
013
015
005
210
001
555
222
306
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
AOR-W Indot at Laurentides
AOR-W KDD at Burum
Indot
KDD
Korea Telecom at
AOR-W
Korea Telecom
Stratos Mobile Networks
Morsviazsputnik
OTE
Laurentides
AOR-W Laurentides
Morsviazsputnik at
AOR-W
Laurentides
AOR-W OTE at Southbury
Singapore Telecom at
Ausguel
AOR-W
Singapore Telecom
CMC
AOR-W Southbury
Telecom Italia at
AOR-W
Telecom Italia
Telstra
Southbury
AOR-W Telstra at Laurentides
AOR-W VSNL at Southbury
VSNL
IOR
IOR
IOR
IOR
IOR
IOR
IOR
IOR
IOR
IOR
IOR
IOR
IOR
IOR
IOR
IOR
IOR
Arvi
VSNL
306
011
868
002
012
118
001
004
555
888
007
025
060
006
015
333
222
BV, BF, BT, BD
Ausguel
France Telecom
BV. BF, BT, BD, BHSD
BV, BF, BT, BD
Beijing Marine &
Navigation
Beijing
British Telecom at EIK
Burum
BT
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD,
BV, BF, BT, BD
PTT Telecom
HKT
Cape d'Aguilar
Comt Eurasia
Eik
CMC
BV, BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV, BF, BT
Telenor
Fucino
Telecom Italia
Datastream Technology
Indot
Jabatan Telekom
Jatiluhur
Jeddah
BV, BF, BT, BD
Ministry of PTT
Malaysia Telecom
Korea Telecom
Morsviazsputnik
Thailand
BV, BF, BT, BD, pending RCC info
BV, BF, BT
Kuantan
Kumn
BV, BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV, BF, BT
Morsviazsputnik at
Perth
Nonthaburi
Perth
TELSTRA
BV, BF, BT, BD, BHSD,
31
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IOR
IOR
IOR
IOR
IOR
IOR
IOR
Raisting
DeTeMobil
111
210
013
016
005
123
003
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV, BF, BT, BD, pending results
BV, BF, BT, BD, BHSD, pending results
BV. BF, BT, BD
Sento
Singapore Telecom
Stratos Mobile Networks
Telekomunikacja Polska
OTE
Stratot Perth
Pry
Thermoplyae
Towi Al man
Yamaguchi
ETILAT
KDD
BV. BF, BT, BD
Beijing Marine &
Navigation
POR
POR
POR
POR
POR
POR
POR
POR
POR
POR
POR
POR
POR
POR
POR
POR
POR
POR
POR
POR
Beijing
868
002
118
111
011
007
888
006
060
015
005
222
001
210
013
012
555
004
306
003
BV, BF, BD, BT
BT Pacific
BT
BV, BF, BD, BT, BHSD
BV. BF, BD, BT
Cape d'Aguilar
DeTeMobil at Perth
HKT
DeTeMobil
BV, BF, BT, BD, BHSD
BV, BF, BT, BD, BHSD
BV, BF, BT, BD, BHSD
BV, BF, BT
France Telecom at Perth France Telecom
Indot at Perth
Jabatan Telekom
Kumn
Indot
Datastream Technology
Korea Telecom
Malaysia Telecom
Morsviazsputnik
OTE
BV, BF, BT, BD, BHSD,
BV, BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV, BF, BT, BD, BHSD
BV, BF, BT, BD, BHSD
BV, BF, BT, BD, BHSD
BV. BF, BT, BD, BHSD
BV. BF, BT, BHSD, BD
BV. BF, BT, BD
Malaysia Telecom at
Perth
Morsviazsputnik at
Perth
OTE at nta Paula
Perth
TELSTRA
nta Paula
Sento
CMC
Singapore Telecom
Stratos Mobile Networks
Stratot Perth
Station 12 at Yamaguchi PTT Telecom
Telecom Italia at nta
Telecom Italia
Paula
BV, BF, BT, BD, BHSD
BV, BF, BD, BT, BHSD
BV, BF, BT, BD, BHSD
BV, BF, BT, BD,
Telenor at BT Pacific
VSNL at nta Paula
Yamaguchi
Telenor
VSNL
KDD
32
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SPECIFICATIONS OF HSD MODEM UNIT
IB-681
1. GENERAL
(1) Tx Frequency
(2) Rx Frequency
179.8 MHz
90.0 MHz
(3) Channel Frequency Spacing 100 kHz
(4) Receive Level
(5) Transmit Level
(6) Channel Rate
(7) Modulation
(8) Data Speed
(9) Interface
-60 dBm to -90 dBm
-12.5 dBm
132 Kbps
O-QPSK, 50% filtered
56/64 Kbps, synchronous
RS-232C (Dsub25p), RS-449 (Dsub37p)
2. POWER SOURCE
(1) Rated Power
100/220 VAC (±10%): 0.3/0.2 A, 1 Phase, 50/60 Hz
3. ENVIRONMENTAL CONDITION
(1) Temperature
-15 °C to +55 °C
(2) Relative Humidity
(3) Water Resistance
93% at +40 °C
IPX2
4. COATING COLOR
(1) Cover
2.5GY5/1.5 Newtone No.5
N3.0
(2) Panel
SP - 1
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INDEX
A
T
Address call ..................................... 7, 13
Automatic call .................................. 15
Automatic call mode ........................ 3
Automatic data rate switching ......... 4
Automatic HSD call ......................... 7
Terminal interface ............................ 4
TX IF ............................................... 2
V
V.25bis ............................................ 10
B
Breaker ............................................ 2
BSC format ...................................... 4
C
Character format ............................. 4
Command format ............................ 4
CRN .................................................. 10
D
Data rate ......................................... 3
DIC .................................................. 9
DIMMER control .............................. 1
DIP switches ................................... 3
Direct call ........................................ 7, 12
DTE ................................................. 7
DTR ................................................. 7, 9
H
HDLC format ................................... 4
HSD CTRL ...................................... 2
HSD DATA 1 .................................... 2
HSD DATA 2 .................................... 2
M
Manual call ...................................... 8, 14
P
POWER switch ................................ 1
Progress tones ................................ 8
R
receiving .......................................... 9
REF ................................................. 2
RI ..................................................... 9
RS-232 ............................................ 2, 4, 20
RS-449 ............................................ 2, 4, 21
RX IF ............................................... 2
S
Status LEDs .................................... 1
Switch panel .................................... 3
Index-1
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