Patton electronic Network Card 1080A User Manual

USER  
MANUAL  
MODEL 1080A and  
MODEL 1080A-64  
Universal Synchronous &  
Asynchronous  
Short Range Modems  
Part #07M1080A-D  
Doc. #072041UD  
Revised 6/19/98  
SALES OFFICE  
(301) 975-1000  
TECHNICAL SUPPORT  
(301) 975-1007  
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An ISO-9001  
Certified Company  
 
2.0 GENERAL INFORMATION  
3.0 CONFIGURATION OVERVIEW  
Thank you for your purchase of this Patton Electronics product.  
This product has been thoroughly inspected by Patton's qualified  
technicians. 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 1080A Series is fairly simple to install and is ruggedly  
designed for excellent reliability: just set it and forget it. The following  
instructions will help you set up and install the Model 1080A or 1080A-  
64 properly.  
3.1 CONFIGURATION SWITCHES  
2.1 FEATURES  
The Model 1080A Series uses a unique set of 24 external mini DIP  
switches that allow configuration to an extremely wide range of  
applications. These 24 DIP switches are grouped into three eight-  
switch sets, and are externally accessible from the underside of the unit  
(see Figure 1). Since all configuration DIP switches are externally  
accessible, there is no need to open the case for configuration.  
• Synchronous or asynchronous operation  
Model 1080A supports data rates up to 57.6 kbps  
Model 1080A-64 supports data rates up to 64 kbps  
• Two-wire/half duplex or four-wire/full or half duplex  
V.52 & V.54 test modes  
• Automatic equalization & gain control  
• Anti-streaming timer  
• Distances up to 20 miles (32 km)  
The configuration switches allow you to select data rates, clocking  
methods, V.52 & V.54 tests, word lengths, extended signaling rates,  
async. or sync. mode, 2- or 4-wire operation, anti-stream control and  
input impedance. The drawings, text and tables on the following pages  
describe all switch locations, positions and functions.  
• Point-to-point or multipoint  
• Internal, external or received loopback clocking  
• Hardware and software flow control support  
• Built-in transformer isolation & high speed surge protection  
• External AC power  
• Bi-color LED indicators  
• Detects broken or inferior cable by lighting error LED  
2.2 DESCRIPTION  
FRONT  
The Model 1080A Series Universal Short Range Modem  
operates 2-wire (half duplex) or 4-wire (full or half duplex), in  
synchronous or asynchronous modes, over unconditioned telephone  
lines. The Model 1080A supports bit rates up to 57.6 kbps. The Model  
1080A-64 supports rates up to 64 kbps. Both operate in synchronous  
mode between the local and remote modems; when connected to an  
asynchronous RS-232 device, the Model 1080A Series SRM converts  
the asynchronous data to synchronous data.  
ON  
ON  
S1  
1
2
3
4
5
6
7
8
The Model 1080A Series has several features to enhance overall  
performance: automatic equalization, automatic gain control, anti-  
streaming timer, transformer isolation to guard against data loss due to  
ground potential differences, and Silicon Avalanche Diode surge  
protection to guard against data line transients.  
ON  
1
S2  
S3  
2
3
4
5
6
7
8
ON  
1
2
3
4
5
6
7
8
OFF  
The Model 1080A Series features V.52 compliant bit error rate  
pattern tests and two V.54 test modes: local analog loopback and  
remote digital loopback. The operator at the local end may test both  
local and remote modems, plus the line, in the digital loopback mode.  
Both RDL and LAL modes can be controlled by a manual switch or via  
the V.24/RS-232 interface.  
REAR  
Figure 1. Underside of Model 1080A Series, showing location of DIP switches  
3
4
 
Each Model 1080A Series SRM has three sets of eight switches,  
yielding 24 total DIP switches. The three sets will be referred to as S1,  
S2 and S3. As Figure 2 shows, the orientation of all DIP switches is the  
same with respect to “ON” and “OFF” positions.  
Shown in the tables below are DIP Switch settings for Models  
1080A and 1080A-64.  
MODEL 1080A DATA RATE SETTINGS  
S1-1  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
On  
Off  
S1-2  
On  
On  
Off  
Off  
On  
On  
Off  
Off  
On  
On  
On  
On  
S1-3  
On  
On  
On  
On  
Off  
Off  
Off  
Off  
On  
On  
Off  
Off  
S1-4  
On  
On  
On  
On  
On  
On  
On  
On  
Off  
Off  
Off  
Off  
Setting  
1.2 kbps  
1.8 kbps  
2.4 kbps  
3.6 kbps  
4.8 kbps  
7.2 kbps  
9.6 kbps  
14.4 kbps  
19.2 kbps  
28.8 kbps  
38.4 kbps  
57.6 kbps  
ON  
ON  
1
2
3
4
5
6
7
8
OFF  
Figure 2. Close-up of DIP switches showing “ON” and “OFF” positions  
3.2 CONFIGURATION SWITCH SET “S1”  
The DIP switches on S1 set data rate, clock source, async./sync.  
mode and carrier control method. The default settings are summarized  
in the table below.  
MODEL 1080A S1 SUMMARY TABLE  
DATA RATE SETTINGS - MODEL 1080A-64  
Position  
S1-1  
S1-2  
S1-3  
S1-4  
S1-5  
S1-6  
S1-7  
S1-8  
Function  
Data Rate  
Factory Default  
S1-1  
Off  
Off  
S1-2  
On  
Off  
S1-3  
Off  
Off  
S1-4  
On  
On  
Setting  
16 kbps  
32 kbps  
64 kbps  
On  
Off  
Off  
On  
On  
On  
On  
Off  
9,600 bps  
Data Rate  
(1080A) or  
Off  
On  
On  
Off  
Data Rate  
16,000 bps  
(1080A-64)  
}
Data Rate  
Switches S1-5 and S1-6: Clock Source  
Clock Source  
Clock Source  
Async./Sync.  
Carrier Control  
Internal  
}
Switches S1-5 and S1-6 are set in combination to determine the  
transmit clock source for the Model 1080A Series.  
Async.  
Constantly On  
S1-5  
On  
Off  
S1-6  
On  
On  
Setting  
Internal transmit clock  
Receive recover clock  
External transmit clock  
Switches S1-1 through S1-4: Data Rate Setting  
On  
Off  
Switches S1-1 through S1-4 are set in combination to determine  
the asynchronous and synchronous data rate for the Model 1080A and  
1080A-64.  
Switch S1-7: Asynchronous/Synchronous Mode  
The setting for switch S1-7 determines whether the Model 1080A  
Series is in asynchronous or synchronous operating mode.  
S1-7  
On  
Off  
Setting  
Asynchronous  
Synchronous  
5
6
 
Switch S2-3: Extended Signaling Rate  
Switch S1-8: Carrier Control Method  
The setting for switch S2-3 determines the range of variability the  
Model 1080A Series “looks for” in asynchronous data rates (i.e., the  
actual variance from a given frequency level the Model 1080A Series  
will tolerate).  
The setting for switch S1-8 determines whether the carrier is  
“constantly on” or “controlled by RTS”. This setting allows for operation  
in switched carrier, multipoint and/or hardware handshaking  
applications.  
S2-3  
Off  
On  
Setting  
-2.5% to +1%  
-2.5% to +2.3%  
S1-8  
Off  
On  
Setting  
Constantly on  
Controlled by RTS  
3.3 CONFIGURATION SWITCH SET “S2”  
Switches S2-4 and S2-5: RTS/CTS Delay  
The DIP switches on S2 set word length, extended signaling rate,  
RTS/CTS delay, V.52 and V.54 diagnostic test and 2- and 4-wire  
operation.  
The combined settings for switches S2-4 and S2-5 determine the  
amount of delay between the time the unit “sees” RTS and when it  
sends CTS. Options are no delay, 7 ms and 53 ms.  
S2 SUMMARY TABLE  
S2-4  
On  
Off  
On  
Off  
S2-5  
On  
On  
Off  
Off  
Setting  
7 ms  
53 ms  
No delay  
No delay  
Position  
S2-1  
S2-2  
S2-3  
S2-4  
S2-5  
S2-6  
S2-7  
S2-8  
Function  
Word Length  
Factory Default  
Off  
10 bits  
}
Word Length  
Off  
Extended Signaling Rate  
RTS/CTS Delay  
RTS/CTS Delay  
V.52/V.54 Tests  
2-Wire/4-Wire  
Not Used  
Off -2.5% to 1%  
On  
Switch S2-6: V.54 Loopback Test Enable  
7 ms  
}
On  
To reset the V.54 circuit, set switch S2-6 to the “ON” position, then  
back to the “OFF” position.  
Off Normal Operation  
Off  
(4-Wire)  
S2-6  
Off  
On  
Setting  
V.54 Normal Operation  
V.54 Testing Disabled  
N/A  
Switches S2-1 and S2-2: Word Length  
Switch S2-7: 2-Wire/4-Wire Mode Selection  
Switches S2-1 and S2-2 are set in combination to determine the  
word length for asynchronous data.  
The setting for switch S2-7 determines whether the Model 1080A  
Series is operating in 2-wire or 4-wire mode.  
S2-1  
Off  
On  
Off  
On  
S2-2  
On  
On  
Off  
Off  
Setting  
8 bits  
9 bits  
10 bits  
11 bits  
S2-7  
Off  
Setting  
4-wire (full or half duplex)  
2-wire (half duplex only)  
On  
8
7
 
3.4 CONFIGURATION SWITCH SET “S3”  
S3-1, S3-2 SELECTION TABLE FOR MODEL 1080A  
Data Rates, kb/s  
Gauge of  
Cable  
The DIP switches on S3 set the anti-stream control, local loopback  
enable, remote loopback enable and receive (input) impedance levels  
for the Model 1080A Series. Factory default positions of Switch S3 are  
shown in the table below.  
1.2 1.8 2.4 3.6 4.8 7.2 9.6 14.4 19.2 28.8 38.4 57.6  
320 320 200 200 200 200 200 130 130 130 130 130  
320 320 320 200 200 200 200 200 130 130 130 130  
320 320 320 320 200 200 200 200 200 130 130 130  
320 320 320 320 320 200 200 200 200 200 130 130  
19AWG/.9mm  
22AWG/.6mm  
24AWG/.5mm  
26AWG/.4mm  
S3 SUMMARY TABLE  
Position  
S3-1  
S3-2  
S3-3  
S3-4  
S3-5  
S3-6  
S3-7  
S3-8  
Function  
Factory Default  
Input Impedance  
Input Impedance  
Not yet assigned  
Mode Selection  
Local Loopback  
Remote Loopback  
Anti-stream Control  
Anti-stream Control  
On  
200 Ohms  
}
Off  
S3-1, S3-2 SELECTION TABLE FOR MODEL 1080A-64  
n/a  
Data Rates, kb/s  
Gauge of  
Cable  
On Point to Point  
16  
32  
64  
Off  
Off  
Off  
Off  
Disabled  
Disabled  
130 130  
200 130  
200 130  
200 200  
130  
130  
130  
130  
19AWG/.9mm  
22AWG/.6mm  
24AWG/.5mm  
26AWG/.4mm  
Disabled  
}
Switches S3-1 & S3-2: Input Impedance  
Switch S3-4: Mode Selection  
The setting for Switches S3-1 and S3-2 determines the 1080A  
Series’ input impedance. This allows you to choose the optimum  
impedance setting for your application. In long distance applications  
the impedance of the cable must match the impedance of the load (or  
resistor) of the Model 1080A Series unit. Thicker gauge cables  
requires a lower Ohm setting, while a thinner gauge cable should  
receive a higher Ohm setting. If you are using higher speeds you will  
need a lower Ohm setting, and a higher Ohm setting for the slower  
speeds. Refer to the table on the following page for assistance in  
selecting a setting.  
The setting for switch S3-4 allows the user to choose the  
appropriate setting for point-to-point or multipoint applications.  
S3-4  
On  
Setting  
Point-to-point  
On  
Off  
Multipoint application as “Master”  
Multipoint application as “Slave”  
Switch S3-5: RS-232 Initiation of Local Loopback Test  
S3-1  
On  
On  
S3-2  
On  
Off  
Setting  
130 Ohms  
200 Ohms  
320 Ohms  
The setting for switch S3-5 determines whether or not the Model  
1080A Series’ local analog loopback test can be initiated by raising pin  
18 on the RS-232 interface.  
Off  
On  
Off  
Off  
High impedance (minimum 2k)  
S3-5  
On  
Off  
Setting  
RS-232 initiation enabled  
RS-232 initiation disabled  
9
10  
 
4.0 INSTALLATION  
Switch S3-6: RS-232 Initiation of Remote Loopback Test  
The Model 1080A Series operates in four twisted pair topologies:  
2-wire/point-to-point, 2-wire/multipoint, 4-wire/point-to-point, and  
4-wire/multipoint. In each of these topologies, the twisted pair wire  
must be 19 - 26 AWG "dry", unconditioned metallic wire (see Appendix  
C for wire recommendations). Dial-up analog circuits, such as those  
used with a standard Hayes-type modem, are not acceptable. The  
twisted pair may be shielded or unshielded. Both types yield favorable  
results.  
The setting for switch S3-6 determines whether or not the Model  
1080A Series’ remote digital loopback test can be initiated by raising  
pin 21 on the RS-232 interface.  
S3-6  
On  
Setting  
RS-232 initiation enabled  
RS-232 initiation disabled  
Off  
The Model 1080A Series offers two methods of twisted pair  
connection: RJ-45 jack and terminal blocks. Figure 3 (below) shows  
the location of these interfaces on the rear panel of the Model 1080A  
Series. Connect the wire to each Model 1080A Series as described in  
the instructions that follow the illustration. The “+” and “-” indicators are  
for reference only. The Model 1080A Series is not sensitive to polarity.  
Switches S3-7 and S3-8: Anti-stream Control  
Switches S3-7 and S3-8 are set in combination to determine the  
time out period for the Model 1080A Series’ anti-stream control timer.  
S3-7  
Off  
S3-8  
Off  
Setting  
Disabled  
Off  
On  
On  
On  
Off  
On  
12.5 seconds  
50.0 seconds  
12.5 seconds  
Made In the USA  
Powered Short Range  
Modem  
RX+ RX- GND TX- TX+  
Power  
RS-232 Interface (Female)  
Line  
Figure 3. Rear view of Model 1080A Series  
4.1 TWO-WIRE INSTALLATION  
When communicating over a single twisted pair circuit, the Model  
1080A Series operates half duplex: that is, it transmits in only one  
direction at a time. This method of operation is effective for both point-  
to-point and multipoint applications.  
In single pair point-to-point applications, you will need a pair of  
Model 1080A or 1080A-64s for each circuit—one at each end of the  
single pair wire. In single-pair multipoint applications you will need  
three or more Model 1080A Series units. These can be connected  
using a star topology, although a daisy chain topology is usually used.  
12  
11  
 
4.1.1 Two-Wire Cable Connection Via RJ-45  
4.1.2 Two-Wire Cable Connection Via Terminal Blocks  
A. The RJ-45 jack on a Model 1080A Series Short Range Modem is  
prewired for a standard TELCO wiring environment. To be sure you  
have the right wiring, use the table below as a guide.  
If you are not going to use the modular jacks, follow the  
instructions below.  
A. Locate the terminal block on the back of the unit. It should  
look like the following diagram:  
RJ-45  
SIGNAL  
1 -------------NC  
2 -------------GND†  
3 -------------RCV  
4 -------------XMT  
5 -------------XMT  
6 -------------RCV  
7 -------------GND  
8 -------------NC  
RX+ RX- GND TX- TX+  
NOTE: * The “+” and “-” indicators are for reference only. The Model 1080A Series is  
not sensitive to polarity.  
B. Connect one wire of the pair to a Transmit lug (TX+ or TX-) on  
both the local and remote Model 1080A or 1080A-64.  
Connection to ground is optional  
C. Connect the other wire of the pair to the other Transmit lug on  
both the local and remote Model 1080A or 1080A/64.  
B. Proper wiring of pairs between the two modems is as follows:  
SIGNAL PIN#  
COLOR*  
COLOR PIN#  
SIGNAL  
D. If there is a shield around the telephone cable, it may be  
connected to GND on the terminal block. We recommend connecting  
the shield at the computer end only to avoid ground loops. A ground  
wire is not necessary for proper operation of these units.  
XMT  
XMT  
4
5
Green ------------Green  
Red ---------------Red  
4
5
XMT  
XMT  
*Standard color codes—yours may be different  
E. When you finish connecting the telephone line to units at both  
ends, it should look like the following diagram:  
C. AT&T standard modular color codes:  
XMT  
XMT  
GND  
XMT  
XMT  
GND  
One Pair  
}
To Shield (Optional)  
1 - Blue  
2 - Orange  
3 - Black  
4 - Red  
5 - Green  
6 - Yellow  
7 - Brown  
8 - Slate  
4.2 FOUR-WIRE INSTALLATION  
When communicating over a two twisted pair circuit, the Model  
Series can operate full or half duplex, point-to-point or multipoint. In  
two pair point-to-point applications, you will need a pair of Model  
1080As or 1080A-64s for each circuit—one at each end of the single  
pair wire. In two pair multipoint applications you will need three or more  
Model 1080A Series units.. These can be connected using a star  
topology, although a daisy chain topology is usually used.  
13  
14  
 
4.2.1 Four-Wire Cable Connection Via RJ-45  
4.2.2 Four-Wire Cable Connection Via Terminal Blocks  
A. The RJ-45 jack on a Model 1080A/1080A-64 Short Range  
Modem is prewired for a standard TELCO wiring environment. To be  
sure you have the right wiring, use the table below as a guide.  
If you are not going to use the modular jacks then follow the  
instructions below.  
A. Locate the terminal block on the back of the unit. It should  
look like the following diagram:  
RJ-45  
SIGNAL  
1 -------------NC  
2 -------------GND†  
3 -------------RCV  
4 -------------XMT  
5 -------------XMT  
6 -------------RCV  
7 -------------GND  
8 -------------NC  
RX+ RX- GND TX- TX+  
* The “+” and “-” indicators are for reference only. The Model 1080A Series is  
not sensitive to polarity.  
B. Connect one pair of wires in the telephone cable to the  
Transmit lugs (TX+ and TX-) on the terminal block.  
B. Proper crossing of pairs between the two modems is as follows:  
Connection to ground is optional  
C. Connect the other pair of wires in the telephone cable to the  
Receive lugs (RX+ and RX-) on the terminal block.  
SIGNAL PIN#  
COLOR*  
COLOR PIN#  
SIGNAL  
D. If there is a shield around the telephone cable, it may be  
connected to "G" on the terminal block. We recommend connecting the  
shield at the computer end only to avoid ground loops. A ground wire is  
not necessary for proper operation of these units.  
GND†  
RCV  
XMT  
XMT  
RCV  
GND  
2
3
4
5
6
7
Orange ----------Brown  
Black -------------Green  
Red ---------------Yellow  
Green ------------Black  
Yellow------------Red  
Brown------------Orange  
7
5
6
3
4
2
GND  
XMT  
RCV  
RCV  
XMT  
GND  
E. When you finish connecting the telephone line to units at both  
ends, it should look like the following diagram:  
*Standard color codes—yours may be different  
Connection to ground is optional  
XMT  
XMT  
G
RCV  
RCV  
RCV  
RCV  
G
XMT  
XMT  
One Pair  
One Pair  
}
}
To Shield (Optional)  
C. AT&T standard modular color codes:  
1 - Blue  
2 - Orange  
3 - Black  
4 - Red  
5 - Green  
6 - Yellow  
7 - Brown  
8 - Slate  
15  
16  
 
4.3 FOUR-WIRE, MULTIPOINT INSTALLATION  
HOST  
FIRST SLAVE  
SECOND SLAVE  
Multipoint operation involves the connection of several terminals to  
one host port. In such an application, one local Model 1080A/1080A-64  
is used as a master unit, and it is connected to several remote Model  
1080A/1080A-64s that are acting as slaves. Up to 25 Model 1080A  
Series slaves may be connected to one host Model 1080A Series  
master SRM, provided that the computing hardware and software  
support that many terminal drops.  
XMT  
RCV  
RCV  
RCV  
XMT  
XMT  
XMT  
RCV  
RCV  
RCV  
XMT  
XMT  
In a multipoint environment the master Model 1080A or 1080A-64  
transmits continually. Initiation of two-way communication is carrier-  
controlled by each “slave” Model 1080A Series unit. To facilitate  
multipoint communication, the master Model 1080A-64 should have its  
carrier control DIP switch set to “constantly ON” (S1-8=OFF). Each  
slave Model 1080A Series unit should have its carrier control DIP  
switch set to “controlled by RTS” (S1-8=ON). Figure 4 illustrates a  
typical Model 1080A Series multipoint application.  
HOST  
FIRST SLAVE  
SECOND SLAVE  
XMT  
XMT  
XMT  
XMT  
XMT  
XMT  
4.4 RS-232 CONNECTION  
Connect the synchronous or asynchronous output of your RS-232  
device to the DB-25 interface on the rear panel of the Model 1080A  
Series. Note: The Model 1080A Series is wired to connect to a DTE.  
If your RS-232 output device is DCE, call Patton Technical Support at:  
for specific installation instructions.  
Figure 4. Typical multipoint set-up  
4.3.1 Multipoint Twisted Pair Connection  
The Model 1080A Series supports multipoint applications using a  
star topology. Maximum distance between the units will vary based  
upon the number of drops, data rate, wire gauge, etc. Call Patton  
Technical Support for specific distance estimates. Figures 11 and 12  
show how to wire the one-pair and two-pair cables properly for a Model  
star topology. Note that the ground connection is not needed.  
17  
18  
 
5.0 OPERATION  
5.1.4 The “Error” Indicators  
Once you have configured each Model 1080A Series unit properly  
and connected the twisted pair and RS-232 cables (see Section 4.0),  
you are ready to operate the units. This section describes reading the  
LED status monitors, powering-up and using the built-in V.52 and V.54  
test modes.  
The “Error” indicator LED has three functions:  
A. When the 1080A Series unit is in test mode (green “Test” LED is  
lit), the error LED glows red when bit errors occur.  
B. When not in test mode (green “Test” LED is off), the error LED is  
used to indicate an RTS streaming condition. (See Section 5.2) for  
information on the anti-streaming circuitry.  
5.1 LED STATUS MONITORS  
The Model 1080A Series features six front panel status LEDs that  
indicate the condition of the modem and communication link. Figure 5  
shows the front panel location of each LED. Following Figure 5 is a  
description of each LED's function.  
C. The “Error” LED is also used to detect line quality, such:  
1. The improper use of flat (non-twisted pair) cable to connect  
the modems.  
2. One or more broken wire in the 4 wire twisted pair cable.  
Model 1080 Universal Short Range Modem  
3. The use of low quality twisted pair cable to connect the  
modems.  
V.54 Test  
Modes  
Test  
TD  
RD  
CD  
Error  
RTS  
4. Broken or corroded connector.  
511  
Remote  
Normal  
Local  
511E  
NOTE: In detecting line quality the “Error” LED indicator is designed for  
4 wire twisted pair cable only, and may not function properly with two  
wire cable.  
Figure 5. Front view of Model 1080A Series  
5.1.4.1 Setting Up The “Error” LED To Test Cable Quality  
5.1.1 The “TD” and “RD” Indicators  
If there is any question as to the quality of your line we recommend  
the following test:  
The “TD” and “RD” indicators blink red and green with data activity.  
Red indicates a low RS-232 logic level, green indicates a high RS-232  
logic level. Note: RS-232 devices idle in a low state, so the LED will  
glow red if the connections are correct and the RS-232 device is in an  
idle state.  
1. Disconnect both local and remote modems from their RS-232  
interface. Make sure “TD”, “RD” and “RTS” LEDs are lit red.  
2. Set input impedance of both modems to 200. (S3-1 “On”,  
S3-2 “Off”). NOTE: When testing Model 1080A-64, use  
22AWG, 24AWG, or 26AWG cable only,  
5.1.2 The “RTS” and “CD” Indicators  
3. For Model 1080A, set data rate on both modems for 9.6kbps  
For Model 1080A-64, set data rate on both modems at 16  
kbps.  
The “RTS” and “CD” indicators are bi-color and will glow red for a  
“low” signal or green for a “high” signal. RTS lights for an incoming  
signal on RS-232 pin 4. CD lights for an incoming signal on the line  
side, and the resulting output signal on RS-232 pin 8.  
4. On local modem set “Carrier Constantly On”. (S1-8 “Off”)  
5. Set remote modem to RTS control (S1-8, “On”).  
5.1.3 The “Test” Indicator  
6. Place both front panel toggle switches to neutral position.  
(Test Led will not light)  
The green “Test” LED indicates that V.52 or V.54 tests are running.  
7. Connect both modems to the 4 wire twisted pair cable.  
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5.1.4.2 Reading The Test  
5.4 V.54 TEST MODES  
A. If line quality is good, “Error” LED on local modem will not light  
and “CD” LED will be red. On remote modem “Error” LED will not light  
and “CD” LED will light green.  
The Model Series offers two V.54 test modes to evaluate the  
condition of the modems and the communication link. These tests can  
be activated physically from the front panel, or via the RS-232 interface.  
Note: V.54 test modes are available for point-to-point applications only.  
B. If flat cable is used or parts of the line are flat cable, “Error” LED  
on local modem will light red and “CD” LED will light green. On remote  
modem “Error” LED will not light and “CD” LED will light green.  
5.4.1 Local Analog Loopback (LAL)  
C. If one wire from the 4 wire twisted pair is broken “Error” LED will  
light red and “CD” LED will light green on at least one modem.  
The Local Analog Loopback (LAL) test checks the operation of the  
local Model 1080A Series unit, and is performed separately on each  
unit. Any data sent to the local Model 1080A or 1080A-64 in this test  
mode will be echoed (returned) back to the user device. For example,  
characters typed on the keyboard of a terminal will appear on the  
terminal screen. To perform a LAL test, follow these steps:  
Note: We cannot guarantee accurate detection if small pieces of flat  
cable are present in the line beyond 1500ft of the local modem.  
5.2 ANTI-STREAMING ERROR INDICATOR  
A. Activate LAL. This may be done in one of two ways: First, by  
moving the front panel toggle switch DOWN to "Local". Second, by  
raising pin 18 on the RS-232 interface (Note: Make sure DIP switch  
S2-6 is OFF, and DIP switch S3-5 is ON). Once LAL is activated, the  
Model 1080A Series’ transmit output is connected to its own receiver.  
The "test" LED should be lit.  
When not in test mode (green “Test” LED is off), the front panel  
“Error” LED is used to indicate a streaming error. When the Model  
1080A Series’ anti-streaming circuitry is enabled, the RTS signal from  
the DTE is timer controlled. The timer begins to count when the DTE  
raises RTS. If the time period that RTS remains high exceeds the  
preset time out period, the anti-stream circuit will force RTS low. The  
“Error” LED will light red, indicating a streaming condition (RTS  
continually on). This feature prevents a malfunctioning terminal from  
tying-up a computer port in a multi-drop or polling environment. When  
the DTE drops RTS, the anti-streaming timer is automatically reset and  
the front panel “Error” LED turns off. The time out period is DIP switch  
selectable for 12.5 or 50 seconds.  
B. Verify that the data terminal equipment is operating properly and  
can be used for a test. If a fault is indicated, call a technician or replace  
the unit.  
C. Perform a BER (bit error rate) test on each unit. If the BER test  
equipment indicates no faults, but the data terminal indicates a fault,  
follow the manufacturer's checkout procedures for the data terminal.  
Also, check the RS-232 interface cable between the terminal and the  
Model 1080A/1080A-64.  
5.3 POWER-UP  
Apply AC power to the Model 1080A Series by plugging the  
separate AC power adapter first into the rear panel of the Model  
1080A/1080A-64, and then into an acceptable AC power outlet. There  
is no power switch on the Model 1080A/1080A-64; and the  
remote/normal/loopback switch should be set to “normal”. When the  
local and remote Model 1080A/1080A-64s are both powered up, and  
passing data normally, the following LED conditions will exist:  
5.4.2 Remote Digital Loopback (RDL)  
The Remote Digital Loopback (RDL) test checks the performance of  
both the local and remote Model 1080A/1080A-64s, and the  
communication link between them. Any characters sent to the remote  
1080A or 1080A-64 in this test mode will be returned back to the  
originating device. For example, characters typed on the keyboard of  
the local terminal will appear on the local terminal screen after having  
been passed to the remote Model 1080A/1080A-64 and looped back.  
To perform an RDL test, follow these steps:  
• TD & RD = flashing red and green  
• RTS & DCD = green  
• TEST = off  
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APPENDIX A  
A. Activate RDL. This may be done in two ways: First, by moving  
the front panel toggle switch UP to "Remote". Second, by raising pin 21  
on the RS-232 interface (Note: Make sure DIP switch S3-6 is ON; and  
DIP switch S2-6 is OFF).  
PATTON MODEL 1080A SERIES SPECIFICATIONS  
Transmission Format:  
Synchronous or asynchronous, 2-  
wire/half duplex, or 4-wire/full or half  
duplex  
B. Perform a BER (bit error rate) test on the system.  
C. If the BER test equipment indicates a fault, and the Local Analog  
Loopback test was successful for both Model 1080A Series units, you  
may have a problem with the twisted pair line between the modems.  
You should then test the twisted pair line for proper connections and  
continuity.  
Interface:  
RS-232 (CCITT V.24) connection via  
DB-25 female; twisted pair connection  
via RJ-45 or terminal block  
Transmission Line:  
Data Rates:  
2 or 4-wire UTP, 19 - 24 AWG  
Model 1080A - Synchronous or  
asynchronous at 1.2, 1.8, 2.4, 3.6, 4.8,  
7.2, 9.6, 14.4, 19.2, 28.8, 38.4, and 57.6  
kbps—switch selectable;  
5.4.3 Using the V.52 BER Test Independently  
The V.52 BER test can be used independently of the V.54 loopback  
tests. This requires two operators: one to initiate and monitor the test  
at the local 1080A/1080A-64, and one at the remote 1080A/1080A-64.  
To use the V.52 BER test by itself, both operators should  
simultaneously follow these steps:  
Model 1080A-64 - Synchronous or  
asynchronous at 16, 32, and 64  
kbps—switch selectable  
Clocking:  
Controls:  
Internal, external or receive recover  
Carrier constantly “ON” or “controlled by  
RTS”; RTS/CTS delay set to no delay, 7  
or 53 ms  
1. Locate the “511/511E” toggle switch on the front panel of the unit  
and move it UP. This activates the V.52 BER test mode and  
transmits a “511” test pattern to the other unit. If any errors are  
present, the receiving modem's red “ERROR” LED will blink  
sporadically. Note: For this test to function, the “511” switch on  
both 1080A Series units must be on.  
Applications:  
Indicators:  
Point-to-point or multi-point  
Bi-color LED indicators for TD, RD, RTS  
& DCD; single LED indicators for Test  
and Error  
RTS Anti-stream Timer  
Diagnostics:  
12.5 sec., 50 sec., or disabled (switch  
selectable); tolerance: +50%, -0  
2. If the test indicates no errors are present, move the V.52 toggle  
switch DOWN, activating the “511/E” test with periodic errors  
present. If the test is working properly, the receiving modem’s red  
“ERROR” LED will blink regularly. A successful “511/E” test will  
confirm that the link is in place, and that the Model 1080A Series’  
built-in “511” generator and detector are working properly.  
V.52 compliant bit error rate pattern  
(511/511E pattern) generator and  
detector with error injection mode;  
V.54 compliant—Local Analog Loopback  
and Remote Digital Loopback, activated  
by front panel switch or via RS-232  
interface  
5.5 POWER-DOWN  
Transformer Isolation:  
Surge Protection:  
Temperature:  
1500 V RMS  
Turn off the Model 1080A Series by simply unplugging the AC  
power adapter from the wall. There is no power switch.  
Immune to IEC-801-5 Level 2, 1kV  
0-50°C / 32-122°F  
Humidity:  
0-95%, non-condensing  
6.2”w x 4.2”h x 1.5”l  
Dimensions:  
Power Supply (US):  
Wall-mount; input: 120 V AC; output:  
10-12 V AC  
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APPENDIX C  
APPENDIX B  
PATTON MODEL 1080A SERIES CABLE RECOMMENDATIONS  
PATTON MODEL 1080A SERIES FACTORY REPLACEMENT  
PARTS AND ACCESSORIES  
All Patton Electronics Company Short Range Modems are tested to the  
distances published in our Catalogs and Specification Sheets on twisted-  
pair cable with the following characteristics:  
Patton Model #  
Description  
Wire Gauge  
Capacitance  
Resistance  
080510ACB.....................120V Wall Mount AC Adapter  
08059ACI ........................230V AC Adapter (No Power Cord)  
07M1080A.......................Model 1080A Series User Manual  
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.  
26 AWG(.4mm) 83nF/mi or 15.72 pF/ft.  
.0163/ft.  
.0326/ft.  
.05165/ft.  
.08235/ft.  
We fully expect that the Short Range Modems will operate on lines with  
specifications different from those tested, but to reduce the potential  
difficulties in the field, one should ensure that the cable being used has  
similar or better characteristics (lower capacitance or lower resistance).  
Wire with capacitance of 20pF/ft. or less is suitable for all our Short  
Range Modems however, distances may vary from those published in our  
catalog. Resistance will also affect distance but not functionality. Wire  
should be 26 AWG (.4mm) or larger (smaller AWG#).  
Patton products are designed to withstand normal environmental noise  
and conditions however, other environmental factors too numerous to  
discuss in this format may affect proper operation of the SRM’s.  
Selection of the proper SRM for an application is critical to maintaining  
Customer Satisfaction and should be taken seriously. Certain models are  
better suited for particular applications and environments than others.  
Model 1080A Distance Table in miles (km)  
Data  
AWG Wire Gauge (mm)  
Rate (bps)  
19 (.9)  
22 (.6)  
24 (.5)  
26 (.4)  
57,600  
38,400  
28,800  
19,200  
14,400  
9,600  
7,200  
4,800  
3,600  
2,400  
1,800  
1,200  
12.0(19.3) 7.0(11.2)  
5.3(8.5)  
4.0(6.4)  
13.0(20.9) 7.5(12.1) 6.2(10.0) 4.2(6.8)  
14.0(22.5) 8.0(12.9) 6.6(10.6) 4.6(7.4)  
16.0(25.8) 8.5(13.7) 7.0(11.3) 5.1(8.2)  
17.0(27.4) 11.0(17.7) 9.2(14.9) 6.5(10.5)  
18.5(29.8) 13.0(20.9) 10.4(16.7) 7.5(12.1)  
19.0(30.6) 13.5(21.7) 10.9(17.5) 8.0(12.9)  
19.5(31.4) 14.0(22.5) 11.3(18.2) 8.8(14.2)  
20.0(32.2) 14.5(23.3) 11.5(18.5) 8.8(14.2)  
20.5(33.0) 15.0(24.2) 11.6(18.7) 9.0(14.5)  
20.5(33.0) 15.0(24.2) 11.5(18.5) 8.9(14.3)  
20.0(32.2) 15.0(24.2) 11.4(18.4) 8.9(14.3)  
Model 1080A-64 Distance Table in miles (km)  
Data  
AWG Wire Gauge (mm)  
Rate (bps)  
19 (.9)  
22 (.6)  
24 (.5)  
26 (.4)  
64,000  
32,000  
16,000  
11.0(17.7) 6.5(10.5)  
13.5(21.7) 7.5(12.1) 6.4(10.3) 4.4(7.1)  
16.5(26.6) 10.0(16.1) 8.4(13.5) 6.0(9.6)  
5.0(8.1)  
3.8(6.1)  
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APPENDIX C  
APPENDIX D  
PATTON MODEL 1080A SERIES INTERFACE PIN ASSIGNMENT  
PATTON MODEL 1080A SERIES BLOCK DIAGRAM  
RS-232 FEMALE, D-SUB 25 CONNECTOR  
(DCE ORIENTATION)  
DIRECTION  
STANDARD RS-232C/V.24 “DCE” SETTING  
DIRECTION  
1- (FG) Frame Ground  
2- (TD) Transmit Data  
3- (RD) Receive Data  
4- (RTS) Request to Send  
To 1080A  
From 1080A  
To 1080A  
5- (CTS) Clear to Send  
Analog Loop - 18  
From 1080A  
From 1080A  
To 1080A  
6- (DSR) Data Set Ready  
7- (SG) Signal Ground  
8- (DCD) Data Carrier Detect  
From 1080A  
To 1080A  
To 1080A  
Data Term. Ready (DTR) - 20  
Digital Loop - 21  
From 1080A  
Test Mode - 25  
Copyright © 1998  
Patton Electronics Company  
All Rights Reserved  
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