USER
MANUAL
MODEL 1005 and
1005S
Async. Carrier Sense
Short Range Modem
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
Part #07M1005-C
Doc. #052031UC
Revised 4/29/98
An ISO-9001
Certified Company
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2.0 GENERAL INFORMATION
3.0 CONFIGURATION
Thank you for your purchase of this Patton Electronics product.
This product has been thoroughly inspected and tested and is
warranted for One Year parts and labor. If any questions or problems
arise during installation or use of this product, please do not hesitate to
contact Patton Electronics Technical Support at (301) 975-1007.
The Model 1005 is designed to be easy to use. There are no
internal jumpers or configuration switches to set, so there is no need to
open the case to configure the unit (you may need to open the case for
wire connection—refer to Section 4.0). The only configuration
necessary for operation is proper setting of the external DCE/DTE
switch.
The figure below shows the location of the DCE/DTE switch on the
PC board, as well as the location of the terminal block and surge
suppressors (“S” model only).
2.1 FEATURES
• Ideal for UNIX operating systems
• Range to 17 miles (27.2 km)
• Data rates to 19,200 bps
• No AC power or batteries required
• Carrier sense handshaking
DCE/DTE
Switch
Surge
Suppressors
• Useful for troubleshooting or monitoring a line
• Very thin case for closely spaced computer ports
• Available with RJ-11, RJ-45 or terminal block with strain relief
• External DCE/DTE switch
(1005S only)
• Connects directly to the RS-232 port
• Compatible with Patton Models 1000, 1004, 1009 and 1015
• Made in USA
Terminal
Block
2.2 DESCRIPTION
The Patton Model 1005 Carrier Sense Short Range Modem
allows RS-232 UNIX systems to communicate up to 17 miles (27.2 km)
over two unconditioned twisted pair cable. Supporting data rates to
19.2 Kbps, the Model 1005 requires no AC power or batteries.
3.1 SETTING THE DCE/ DTE SWITCH
For your convenience, the Model 1005 has an externally
accessible DCE/DTE switch (see diagram below). If the device
connected to the Model 1005 is a modem or multiplexer (or is wired like
one), set the switch to “DTE”. This setting causes the Model 1005 to
behave like Data Terminal Equipment and transmit data on pin 2.
The Model 1005 has a unique carrier sense feature, which
automatically detects the presence of a carrier on the line. This is
particularly useful in UNIX environments, where the host must see a
carrier before it sends a logon screen to the terminal. This feature also
plays an important role in troubleshooting, where the presence or
absence of a carrier indicates positive or negative line integrity.
Measuring only 2.66” x 2.10” x .73” (6.76 x 5.33 x 1.85 cm), the
Model 1005 is housed in a pop-open ABS plastic case. The Model
1005 comes with a male or female DB-25 connector and a choice of
interfaces (RJ-11 jack, RJ-45 jack, or terminal blocks with strain relief).
For surge handling capability, the Model 1005S is compliant with IEC
801.5 level 2, 1kV.
If the device connected to the Model 1005 is a PC, terminal, or
host computer (or is wired like one), set the switch to “DCE”. This
setting causes the Model 1005 to behave like Data Communications
Equipment and transmit data on pin 3.
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4.0 INSTALLATION
RJ- 11
SIGNAL
RJ- 45
SIGNAL
Once you have properly configured the DCE/DTE switch, you are
ready to connect the Model 1005 to your system. This section tells you
how to connect the Model 1005 to the twisted pair and RS-232
interfaces, and how to operate the Model 1005.
1----------------GND†
2----------------RCV-
3----------------XMT+
4----------------XMT-
5----------------RCV+
6----------------GND†
1----------------N/C
2----------------GND†
3----------------RCV-
4----------------XMT+
5----------------XMT-
6----------------RCV+
7----------------GND†
8----------------N/C
4.1 CONNECTION TO THE TWISTED PAIR INTERFACE
The Model 1005 supports data-only communication between two
RS-232 devices at distances to 17 (27.2 km) miles and data rates to
19.2 Kbps. There are two essential requirements for installation:
When connecting two Model 1005s, it is necessary to use a
“crossover” cable. The diagram below shows how a crossover cable
should be constructed for an environment where both Model 1005s use
a 4-wire RJ-11 connector. Similar logic should be followed when using
RJ-45 connectors or a combination of the two.
1. These units work in pairs. Therefore, you must have one Model
1005 at each end of a two twisted pair interface.
2. To function properly, the Model 1005 needs two twisted pairs of
metallic wire. The pairs must be unconditioned, dry metallic wire,
between 19 and 26 AWG (the higher number gauges may limit
distance). Standard dial-up telephone circuits or leased circuits
that run through signal equalization equipment are not acceptable.
‡
SIGNAL PIN# COLOR
COLOR
PIN# SIGNAL
GND†
RCV-
XMT+
XMT-
RCV+
GND†
1
2
3
4
5
6
Blue---------------------White
Yellow------------------Red
Green ------------------Black
Red ---------------------Yellow
Black -------------------Green
White-------------------Blue
6
4
5
2
3
1
GND†
XMT-
RCV+
RCV-
XMT+
GND†
For your convenience, the Model 1005 is available with three
different twisted pair interfaces: RJ-11 jack, RJ-45 jack and terminal
blocks with strain relief.
†Connection to ground is optional
‡Standard color codes—yours may be different
4.1.1 TWISTED PAIR CONNECTION USING RJ- 11 OR RJ- 45
The RJ-11 and RJ-45 connectors on the Model 1005's twisted pair
interface are pre-wired for a standard TELCO wiring environment (see
Figure 1). The table on the following page shows the signal/pin
relationships.
4.1.2 TWISTED PAIR CONNECTION USING TERMINAL BLOCKS
If your RS-232 application requires you to connect two pairs of
bare wires to the Model 1005, you will need to open the case to access
the terminal blocks. The following instructions will tell you how to open
the case, connect the bare wires to the terminal blocks, and fasten the
strain relief collar in place so that the wires won't pull loose.
1 - Blue
1 - Blue
2 - Orange
3 - Black
4 - Red
2 - Yellow
3 - Green
4 - Red
5 - Green
6 - Yellow
7 - Brown
8 - Slate
5 - Black
6 - White
Figure 1. AT&T standard modular color codes
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1. Open the unit by gently inserting a screwdriver between the
DB-25 connector and the lip of the plastic case (see below).
You don't have to worry about breaking the plastic, but be
careful not to bend the D-sub connector.
4. Connect one pair of wires to XMT+ and XMT- (transmit
positive and negative) on the terminal block, making careful
note of which color is positive, and which color is negative.
Once the unit has been opened, you will be able to see the
terminal blocks located at the rear of the PC board.
5. Connect the other pair of wires to RCV+ and RCV- (receive
positive and negative) on the terminal block, again making
careful note of which color is positive and which color is
negative.
Ultimately, you will want to construct a two pair crossover
cable that connects the two short hauls as shown below:
XMT +
XMT -
G
RCV -
RCV +
RCV+
RCV -
G
XMT -
XMT +
One Pair
One Pair
}
}
To Shield (Optional)
6. If there is a shield around the telephone cable, it may be
connected to “G” on the terminal block. To avoid ground
loops, we recommend connecting the shield at the computer
end only. A ground wire is not necessary for proper operation
of the Model 1005.
7. When you finish connecting the wires to the terminal block, the
assembly should resemble the diagram below:
2. Strip the outer insulation from the twisted pairs about one inch
from the end.
3. Strip the insulation on each of the twisted pair wires about .25”.
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8. Place the 2 halves of the strain relief assembly on either side
of the telephone wire and press together very lightly. Slide the
assembly so that it is about 2 inches from the terminal posts
and press together firmly. If your cable diameter is too small
or too large for our strain relief, please contact our technical
support. We have strain relief assemblies to accommodate
most cable diameters.
10. TIP the top half of the case as necessary to place it over the
strain relief assembly. Do not snap the case together yet.
11. Insert one captive screw through a saddle washer and then
insert the entire piece through the hole in the DB-25 end of the
case. Snap that side of the case closed. Repeat the process
for the other side. This completes the cable installation
process.
4.2 CONNECTION TO THE RS- 232 INTERFACE
9. Insert the strain relief assembly with the wire going through it
into the slot in the bottom half of the modem case and set it
into the recess in the case.
Once you have configured the Model 1005 for DTE or DCE and
connected the twisted pair wires correctly, simply plug the 1005 directly
into the DB-25 port of the RS-232 device. After doing so, remember to
insert and tighten the two captive connector screws.
Note: If you must use a cable to connect the Model 1005 to the
RS-232, make sure it is a straight through cable of the shortest possible
length—we recommend 6 feet or less. The Model 1005 requires a
cable that incorporates pins 2, 3, 4, 5, 6, 7, 8 and 20.
4.3 OPERATING THE MODEL 1005
Once the Model 1005 is properly installed, it should operate
transparently—as if it were a standard cable connection. Operating
power is derived from the RS-232 data and control signals; there is no
“ON/OFF” switch.
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APPENDIX A
APPENDIX B
PATTON MODEL 1005 SPECIFICATIONS
PATTON MODEL 1005 CABLE RECOMMENDATIONS
Transmission Format: Asynchronous
The Patton Model 1005 operates at frequencies of 20kHz or less
and has been performance tested by Patton technicians using twisted-
pair cable with the following characteristics:
Data Rate: 0 to 19,200 bps (no strapping)
Control Signal: DCE Mode: CTS (Pin 5) turns ON immediately after
the terminal raises RTS (Pin 4); DSR (Pin 6) turns on when is
powered-up (connected); DCD (Pin 8) turns ON after detecting the
receive signal from the line; DTE Mode: RTS (Pin 4) turns “ON”
immediately after the modem raises CTS (Pin 5); DTR (Pin 20)
turns "ON" after recognizing the receive signal from the line; Pins
11, 19 and 20 are hardwired together on the DB-25 side of the
DCE/DTE switch
Wire Gauge
Capacitance
Resistance
19 AWG/.9mm 83nf/mi or 15.72 pf/ft.
22 AWG/.6mm 83nf/mi or 15.72 pf/ft.
24 AWG/.5mm 83nf/mi or 15.72 pf/ft.
.0163 Ohms/ft.
.0326 Ohms/ft.
.05165 Ohms/ft.
To gain optimum performance from the Model 1005, please keep
the following guidelines in mind:
Transmit Line: 4-wire, unconditioned line
Transmit Mode: Full duplex, 4-wire
Transmit Level: 0 dBm
• Always use twisted pair wire—this is not an option.
• Use twisted pair wire with a capacitance of 20pf/ft or less.
• Avoid twisted pair wire thinner than 26 AWG (i.e. avoid higher
AWG numbers than 26)
Connection: Either a male or female DB-25
Line Connection: RJ-11 or RJ-45 jack or 5 screw terminal posts
(4 wires and 1 ground) and a strain relief insert
• Use of twisted pair with a resistance greater than the above
specifications may cause a reduction in maximum distance
obtainable. Functionality should not be affected.
Power Supply: No additional power required, uses ultra low power
from EIA data and control signals; additional power can be added
at pin 9 for +V DC when DB-25 is below the RS-232 standard
requirements
• Environmental factors too numerous to mention can affect the
maximum distances obtainable at a particular site. Use “maximum
distance” figures as a general guideline only.
Surge Protection: Compliant with IEC 801.5 level 2, 1kV (Model
1005S Only)
Model 1005 Distance Table in Miles (km)
Size: 2.66” x 2.10” x 0.73” (6.76 x 5.33 x 1.85 cm)
Wire Gauge
Data Rate
(bps)
19 AWG
( 0.9 mm)
24 AWG 26 AWG
(0.5 mm) (0.4 mm)
19,200
9,600
4,800
2,400
1,200
6.2(10.0) 3.7(6.0) 1.2(1.9)
7.5(12.1) 4.9(7.9) 2.5(4.0)
8.7(14.0) 5.6(9.0) 3.7(6.0)
11.8(19.0) 8.0(12.9) 4.9(7.9)
17.0(27.4) 11.8(19.0) 8.0(12.9)
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APPENDIX C
APPENDIX D
PATTON MODEL 1005 PIN/ SIGNAL ASSIGNMENTS
PATTON MODEL 1005 BLOCK DIAGRAM
DIRECTION
STANDARD “DCE” SETTING
DIRECTION
1- (FG) Frame Ground
2- (TD) Transmit Data
To Model 1005
3- (RD) Receive Data
4- (RTS) Request to Send
5- (CTS) Clear to Send
6- (DSR) Data Set Ready
7- (SG) Signal Ground
From Model 1005
To Model 1005
From Model 1005
From Model 1005
To Model 1005
Data Term. Ready (DTR) - 20
8- (DCD) Data Carrier Detect From Model 1005
DIRECTION
STANDARD “DTE” SETTING
DIRECTION
1- (FG) Frame Ground
2- (TD) Transmit Data
3- (RD) Receive Data
From Model 1005
To Model 1005
From Model 1005
To Model 1005
To Model 1005
4- (RTS) Request to Send
5- (CTS) Clear to Send
6- (DSR) Data Set Ready
7- (SG) Signal Ground
8- (DCD) Data Carrier Detect
From Model 1005 Data Term. Ready (DTR) - 20
To Model 1005
Copyright © 1998
Patton Electronics Company
All Rights Reserved
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