USER
MANUAL
MODEL 1080ARC
Universal Synchronous &
Asynchronous
Short Range Modem
Rack Mount Card
Part# 07M1080ARC-D
Doc# 072051UD
Revised 7/12/01
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
An ISO-9001
Certified
Company
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5.0 Operation.................................................................................... 27
The “Test” Indicator .................................................................... 28
Reading The Test....................................................................... 29
5.3 Power-up .................................................................................... 30
Local Analog Loopback (LAL) .................................................... 30
Remote Digital Loopback (RDL)................................................. 31
Using The V.52 BER Test Independently................................... 32
A
B
C
D
Specifications ............................................................................ 33
Cable Recommendations.......................................................... 34
1080ARC Factory Replacement Parts...................................... 36
1080ARC Interface Standards .................................................. 37
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1.0 WARRANTY INFORMATION
Patton Electronics warrants all Model 1080ARC components to be free
from defects, and will—at our option—repair or replace the product
should it fail within one year from the first date of shipment.
This warranty is limited to defects in workmanship or materials, and does
not cover customer damage, abuse or unauthorized modification. If this
product fails or does not perform as warranted, your sole recourse shall
be repair or replacement as described above. Under no condition shall
Patton Electronics be liable for any damages incurred by the use of this
product. These damages include, but are not limited to, the following:
lost profits, lost savings and incidental or consequential damages arising
from the use of or inability to use this product. Patton Electronics spe-
cifically disclaims all other warranties, expressed or implied, and the
installation or use of this product shall be deemed an acceptance of
these terms by the user.
1.1 FCC INFORMATION
This equipment has been tested and found to comply with the limits for a
Class A digital device, pursuant to Part 15 of the FCC Rules.These limits
are designed to provide reasonable protection against harmful interfer-
ence when the equipment is operated in a commercial environment.This
equipment generates, uses, and can radiate radio frequency energy and,
if not installed and used in accordance with the instruction manual, may
cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference in
which case the user will be required to correct the interference at his own
expense. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment
off and on, the user is encouraged to try to correct the interference by
one or more of the following measures:
• Reorient or relocate the receiving antenna
• Increase the separation between the equipment and receiver
• Connect the equipment into an outlet on a circuit different from that to
which the receiver is connected
1.2 CE NOTICE
The CE symbol on your Patton Electronics equipment indicates that it is in
compliance with the Electromagnetic Compatibility (EMC) directive and
the Low Voltage Directive (LVD) of the Union European (EU). A Certificate
of Compliance is available by contacting Patton Technical Support.
4
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1.3 SERVICE
All warranty and non-warranty repairs must be returned freight prepaid
and insured to Patton Electronics. All returns must have a Return Materi-
als Authorization number on the outside of the shipping container. This
number may be obtained from Patton Electronics Technical Service at:
Tel: (301) 975-1007
E-mail: [email protected]
URL: www.patton.com
Note
Packages received without an RMA number will not be
accepted.
Patton Electronics’ technical staff is also available to answer any ques-
tions that might arise concerning the installation or use of your Model
1080ARC. Technical Service hours: 8AM to 5PM EST, Monday through
Friday.
5
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2.0 GENERAL INFORMATION
Thank you for purchasing 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.
2.1 FEATURES
• Synchronous or asynchronous operation
• 2-wire half-duplex or 4-wire full- or half-duplex
• V.52 & V.54 test modes
• Automatic equalization & gain control
• Anti-streaming timer
• Data rates to 57.6 kbps
• Distances up to 20 miles (32 km)
• 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
• Bi-color LED indicators
• Switchable 120V or 240V power supply
• Mounts in Patton’s 16-card rack chassis
• Detects broken or inferior cable by lighting error LED
2.2 DESCRIPTION
The Model 1080ARC Series Universal Short Range Modem operates
2-wire (half duplex) or 4-wire (full or half duplex), in synchronous or asyn-
chronous modes at an extended range of 20 miles. It operates at 12
switch-selectable data rates to 57.6 kbps. The Model 1080ARC always
operates in sync. mode between the local and remote modems; when
connected to an async. RS-232 device, the Model 1080ARC converts
the async. data to sync. data.
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The Model 1080ARC has several features to enhance overall perfor-
mance: automatic equalization, automatic gain control, antistreaming
timer, transformer isolation and Silicon Avalanche Diode surge protec-
tion. The Model 1080ARC features V.52 compliant bit error rate pattern
tests and two V.54 test modes.
The Model 1080ARC is designed to mount in Patton’s 2U high 19” rack
chassis. This 16-card chassis has a switchable 120/240 volt power sup-
ply and mounts cards in a mid-plane architecture: The front card can be
plugged into different rear cards. This means that the Model 1080ARC
card can have several interface options and can be switched with other
Patton short haul cards.
7
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3.0 CONFIGURATION
This section describes the location and orientation of the Model
1080ARC’s configuration switches and provides detailed instructions on
setting each of the switches.
The Model 1080ARC uses a unique package of 24 DIP switches that
allow configuration to an extremely wide range of applications. These 24
DIP switches are accessible when the card is slid out of the rack chassis.
Once configured, the Model 1080ARC is designed to operate transpar-
ently, without need for frequent re-configuration.
3.1 SWITCH LOCATIONS AND ORIENTATION
The Model 1080ARC has three sets of eight switches—S1, S2, and S3—
which are mounted on the PC board (Figure 1). These 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, antistream control and input impedance. As Figure 2
shows, the orientation of all DIP switches is the same with respect to
“ON” and “OFF” positions.
Figure 1. Model 1080ARC board, showing location of DIP switches
Figure 2. Close-up of DIP switches showing “ON” and “OFF” positions
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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
Table 1.
Table 1: Summary of DIP switch default settings for set S1
Position
Function
Factory Default
9,600 bps
S1-1
S1-2
S1-3
S1-4
S1-5
S1-6
S1-7
S1-8
Data Rate
Data Rate
On
Off
Off
On
On
On
On
Off
9,600 bps
9,600 bps
9,600 bps
Internal
Data Rate
Data Rate
Clock Source
Clock Source
Async./Sync.
Carrier Control
Internal
Async.
Constantly On
S1-1 through S1-4: Data Rate Setting
Switches S1-1 through S1-4 are set in combination to determine the
asynchronous and synchronous data rate for the Model 1080ARC (see
Table 2).
Table 2: S1-1 through S1-4: Data Rate Settings
S1-1
S1-2
S1-3
S1-4
Setting
On
Off
On
Off
On
Off
On
Off
On
Off
On
Off
On
On
Off
Off
On
On
Off
Off
On
On
On
On
On
On
On
On
Off
Off
Off
Off
On
On
Off
Off
On
On
On
On
On
On
On
On
Off
Off
Off
Off
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
9
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S1-5 and S1-6: Clock Source
Switches S1-5 and S1-6 are set in combination to determine the transmit
clock source for the Model 1080ARC (see Table 3).
Table 3: S1-5 and S1-6: Clock Source Settings
S1-5
S1-6
Setting
On
Off
On
On
On
Off
Internal transmit clock
Receive recover clock
External transmit clock
S1-7: Asynchronous/Synchronous Mode
The setting for switch S1-7 determines whether the Model 1080ARC is in
asynchronous or synchronous operating mode (see Table 4).
Table 4: Asynchronous/Synchronous Mode Settings
S1-7
Setting
Off
Synchronous
S1-8: Carrier Control Method
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 (see
Table 5).
Table 5: Carrier Control Method Settings
S1-8
Setting
Off
On
Constantly on
Controlled by RTS
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3.3 CONFIGURATION SWITCH SET S2
The DIP switches on S2 set word length, extended signaling rate, RTS/
CTS delay, V.52 & V.54 diagnostic tests and 2- and 4-wire operation.
The default settings are summarized in Table 6.
Table 6: Summary of DIP switch default settings for S2
Position
Function
Factory Default
S2-1
S2-2
S2-3
S2-4
S2-5
S2-6
S2-7
S2-8
Not Used
2-Wire/4-Wire
N/A
Off (4-Wire)
V.52/V.54 Tests
RTS/CTS Delay
RTS/CTS Delay
Extended Signaling Rate
Word Length
Off (Normal Operation)
On (7 ms)
On (7 ms)
Off (-2.5% to 1%)
Off (10 bits)
Word Length
Off (10 bits)
S2-2: 2-Wire/4-Wire Mode Selection
The setting for switch S2-2 determines whether the Model 1080ARC is
operating in 2-wire or 4-wire mode (see Table 7).
Table 7: 2-Wire/4-Wire Mode Selection Settings
S2-2
Setting
Off
On
4-wire (full or half duplex)
2-wire (half duplex only)
S2-3: V.52 and V.54 Diagnostic Test
To reset the V.54 circuit, set switch S2-3 to the “ON” position, then back
to the “OFF” position (see Table 8).
Table 8: V.52 and V.54 Diagnostic Test Settings
S2-3
Setting
Off
On
Normal Operation
Test Disabled
11
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S2-4 and S2-5: RTS/CTS Delay
The combined settings for switches S2-4 and S2-5 determine the
amount of delay between the time the Model 1080ARC “sees” RTS and
when it sends CTS. Options are no delay, 7 ms and 53 ms (see Table 9).
Table 9: RTS/CTS Delay Settings
S2-4
S2-5
Setting
On
On
Off
Off
On
Off
On
Off
7 ms
53 ms
No delay
No delay
S2-6: Extended Signaling Rate
The setting for switch S2-6 determines the range of variability the Model
1080ARC “looks for” in asynchronous data rates (i.e., the actual variance
from a given frequency level the Model 1080ARC will tolerate (see
Table 10).
Table 10: Extended Signaling Rate Settings
S2-6
Setting
Off
On
-2.5% to +1%
-2.5% to +2.3%
S2-7 and S2-8: Word Length
Switches S2-7 and S2-8 are set in combination to determine the word
length for asynchronous/synchronous data (see Table 11).
Table 11: Word Length Settings
S2-7
S2-8
Setting
On
On
Off
Off
Off
On
Off
On
8 bits
9 bits
10 bits
11 bits
12
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3.4 CONFIGURATION SWITCH SET S3
The DIP switches on S3 set the antistream control, local loopback
enable, remote loopback enable and receive (input) impedance levels for
the Model 1080ARC. The default settings are summarized in Table 12
and Table 13.
Table 12: Summary of DIP switch default settings for S3
Position
Function
Factory Default
200 Ohms
S3-1
S3-2
S3-3
S3-4
S3-5
S3-6
S3-7
S3-8
Input Impedance
Input Impedance
Not yet assigned
Mode Selection
On
Off
n/a
On
Off
Off
Off
Off
200 Ohms
Point to Point
Disabled
Local Loopback
Remote Loopback
Antistream Control
Antistream Control
Disabled
Disabled
Disabled
Table 13: Selection Table for S3-1, S3-2
Data Rates (kbps)
Cable
gauge
1.2
1.8
2.4
3.6
4.8
7.2
9.6
14.4
19.2
28.8
38.4
57.6
19
22
24
26
320
320
320
320
200
320
200
200
200
200
200
200
200
200
130
200
130
130
130
130
130
130
130
130
320
320
320
320
320
320
320
320
200
320
200
200
200
200
200
200
200
200
130
200
130
130
130
130
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S3-1: Input Impedance
The setting for switch S3-1, S3-2 determines the 1080ARC’s 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
1080ARC. 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. See Table 13 for more details on selecting
a setting.
Table 14: Input Impedance Settings
S3-1S3-2
Setting
130 ohms
On
On
Off
Off
On
Off
On
200 ohms
320 ohms
Off High impedance (minimum 2k-ohms)
S3-4: Mode Selection
The setting for switch S3-4 allows the user to choose the appropriate set-
ting for point-to-point or multipoint applications (see Table 15).
Table 15: Mode Selection Settings
S3-4
Setting
On
On
Off
Point-to-point
Multipoint application as “Master”
Multipoint application as “Slave”
S3-5: RS-232 Initiation of Local Loopback Test
The setting for switch S3-5 determines whether or not the Model
1080ARC’s local analog loopback test can be initiated by raising pin 18
on the RS-232 interface (see Table 16).
Table 16: RS-232 Local Loopback Settings
S3-5
Setting
On
Off
RS-232 initiation enabled
RS-232 initiation disabled
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S3-6: RS-232 Initiation of Remote Loopback Test
The setting for switch S3-6 determines whether or not the Model
1080ARC’s remote digital loopback test can be initiated by raising pin 21
on the RS-232 interface (see Table 17).
Table 17: RS-232 Remote Loopback Settings
S3-6
Setting
On
Off
RS-232 initiation enabled
RS-232 initiation disabled
S3-7 and S3-8: Antistream Control
Switches S3-7 and S3-8 are set in combination to determine the timeout
period for the Model 1080ARC’s antistream control timer (see Table 18).
Table 18: Antistream Control Settings
S3-7
S3-8
Setting
Disabled
Off
Off
On
On
Off
On
Off
On
12.5 seconds
50 seconds
12.5 seconds
15
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3.5 REAR CARD CONFIGURATION
The Model 1080ARC has four interface card options: DB-25/RJ-11, Dual
RJ-45, RJ-45/RJ-11 and DB-25/RJ-45. Each of these options supports
one RS-232 connection and one 4-wire connection (the RS-232 port is
always the lower port on the interface card). Figure 3 illustrates the four
different interface options for the Model 1080ARC:
Figure 3. Model 1080ARC interface card options
Prior to installation, you will need to examine the rear card that you have
selected and ensure that it is configured properly for your application.
Each rear card is configured by setting straps located on the PC board.
Sections “DB-25/RJ-11 & DB-25/RJ-45 Strap Settings” on page 17 and
“RJ-45/RJ-11 & RJ-45/RJ-45 Strap Settings” on page 19 describe the
strap locations and possible settings for each rear card.
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DB-25/RJ-11 & DB-25/RJ-45 Strap Settings
Figure 4 shows strap locations for the Model 1000RCM12511 (DB-25/
RJ-11) and the Model 1000RCM12545 (DB-25/ RJ-45) rear cards.
These straps determine various grounding characteristics for the RS-232
and twisted pair lines.
Figure 4. DB-25/RJ-11 & DB-25/RJ-45 strap locations
Figure 5 shows the orientation of the rear interface card straps. Observe
that the strap can either be on pegs 1 and 2, or on pegs 2 and 3.
Figure 5. Orientation of interface card straps
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Table 19 provides an overview of strap functions for the DB-25/modular
cards. Following this overview is a detailed description of each strap's
function.
Table 19: DB-25/RJ-11 & DB-25/RJ-45 Interface Card Strap Summary
Strap
Function
Position 1&2
Position 2&3
JB2
JB3
Line Shield & FRGND
Connected
Connected
Open*
Open*
DTE Shield (Pin1) &
FRGND
JB4
FRGND & SGND
Connected
Open*
* indicates factory default
Line Shield & FRGND (JB2)
This strap pertains to the line interface. In the connected (closed) posi-
tion, this strap links RJ-11 pins 1 and 6, or RJ-45 pins 2 and 7 to frame
ground. These pins can be used as connections for the twisted pair
cable shield. In the open (disconnected) position, pins 1 and 6 (or 2 and
7) remain connected to each other, but are “lifted” from the frame ground
(see Table 20).
Table 20: Line Shield & FRGND (JB2) Settings
JB2
Position 1&2 =
Line Shield and FRGND Connected
Position 2&3 = Line Shield and FRGND Not Connected
DTE Shield (Pin 1) & FRGND (JB3)
In the connected (closed) position, this strap links DB-25 pin 1 and frame
ground. In the open (disconnected) position, pin 1 is “lifted” from frame
ground (see Table 21).
Table 21: DTE Shield (Pin 1) & FRGND (JB3) Settings
JB3
Position 1&2 =
DTE Shield (Pin 1) and FRGND Connected
Position 2&3 = DTE Shield (Pin 1) and FRGND Not Connected
18
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SGND & FRGND (JB4)
In the connected (closed) position, this strap links DB-25 pin 7 (Signal
Ground) and frame ground. In the open (disconnected) position, pin 1 is
“lifted” from frame ground (see Table 22).
Table 22: SGND & FRGND (JB4) Settings
JB4
Position 1&2 =
Position 2&3 =
SGND (pin 7) and FRGND Connected
SGND (Pin 7) and FRGND Not Connected
RJ-45/RJ-11 & RJ-45/RJ-45 Strap Settings
Figure 6 shows strap locations for the Model 1000RCM1D11 (RJ-45/RJ-
11) and the Model 1000RCM1D45 (RJ-45/ RJ-45) rear cards. These
straps determine various grounding characteristics for the RS-232 and
twisted pair lines.
Figure 6. RJ-45/RJ-11 & RJ-45/RJ-45 strap locations
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Table 23 provides an overview of strap functions for the modular/modular
cards. Following the table is a detailed description of each strap's func-
tion.
Table 23: RJ-45/RJ-11 & RJ-45/RJ-45 Interface Card Strap Summary
Strap
Function
Position 1&2
Position 2&3
JB2
JB5
JB6
Line Shield & FRGND
SGND & FRGND
DTE Pin 2
Connected
Connected
DSR*
Open*
Open*
RI
Line Shield & FRGND (JB2)
This strap pertains to the line interface. In the connected (closed) posi-
tion, this strap links RJ-11 pins 1 and 6, or RJ-45 pins 2 and 7 to frame
ground. These pins can be used as connections for the twisted pair
cable shield. In the open (disconnected) position, pins 1 and 6 (or 2 and
7) remain connected to each other, but are “lifted” from frame ground
(see Table 24).
Table 24: Line Shield & FRGND (JB2) Settings
JB2
Position 1&2 =
Position 2&3 =
Line Shield and FRGND Connected
Line Shield and FRGND Not Connected
SGND & FRGND (JB5)
This strap pertains to the DTE interface, which is a 10-position modular
RJ-45 jack. In the connected (closed) position, this strap links modular
pin 5 (Signal Ground) and frame ground. In the open (disconnected)
position, pin 5 is “lifted” from frame ground (see Table 25).
Table 25: SGND & FRGND (JB5) Settings
JB5
Position 1&2 =
SGND (pin 5) and FRGND Connected
Position 2&3 = SGND (pin 5) and FRGND Not Connected
20
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DTE Interface Pin 2 (JB6)
This strap configures DTE interface pin 2 for Ready Start (DSR) opera-
tion when placed on pegs 1 & 2. Placing the strap on pegs 2 & 3 is not a
valid option when using this rear interface card in conjunction with the
Model 1080ARC (see Table 26)
Table 26: DTE Interface Pin 2 (JB6) Settings
JB6
Position 1&2 =
Ready Start (DSR) Operation
Position 2&3 = Not a valid option
21
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4.0 INSTALLATION
This section describes the functions of the Model 1000R16P rack chas-
sis, tells how to install front and rear Model 1080ARC cards into the
chassis, and provides diagrams for wiring the interface connections cor-
rectly.
4.1 THE MODEL 1000R16P RACK CHASSIS
The Model 1000R16P Rack Chassis (Figure 7) has sixteen short range
modem card slots, plus its own power supply. Measuring only 3.5” high,
the Model 1000R16P is designed to occupy only 2U in a 19” rack.
Sturdy front handles allow the Model 1000R16P to be extracted and
transported conveniently.
The Rack Power Supply
The power supply included in the Model 1000R16P rack uses the same
mid-plane architecture as the modem cards. The front card of the power
supply slides in from the front, and the rear card slides in from the rear.
They plug into one another in the middle of the rack. The front card is
then secured by thumb screws and the rear card by conventional metal
screws.
Figure 7. Model 1000R16P Rack Chassis with power supply
Switching the Power Supply On and Off
The power supply on/off switch is located on the front panel. When
plugged in and switched on, a red front panel LED will glow. Since the
Model 1000R16P is a “hot swappable” rack, it is not necessary for any
cards to be installed before switching on the power supply. The power
supply may be switched off at any time without harming the installed
cards. Be sure power is off before power module card is removed.
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4.2 INSTALLING THE MODEL 1080ARC INTO THE CHASSIS
The Model 1080ARC is comprised of a front card and a rear card. The
two cards meet inside the rack chassis and plug into each other by way
of mating 50 pin card edge connectors. Use the following steps as a
guideline for installing each Model 1080ARC into the rack chassis:
1. Slide the rear card into the back of the chassis along the metal rails
provided.
2. Secure the rear card using the metal screws provided.
3. Slide the card into the front of the chassis. It should meet the rear
card when it’s almost all the way into the chassis.
4. Push the front card gently into the card-edge receptacle of the rear
card. It should “click” into place.
5. Secure the front card using the thumb screws.
Note
Since the Model 1000R16P chassis allows “hot swapping” of
cards, it is not necessary to power down the rack when you
install or remove a Model 1080ARC.
4.3 WIRING THE MODEL 1080ARC
Each of the rear interface cards compatible with the Model 1080ARC has
one RS-232 port and one 4-wire (twisted pair) port. These cards provide
a female DB-25 for RS-232 connection.
RS-232 Connection
The Model 1080ARC uses a DB-25 female to connect the RS-232 inter-
face to your computing hardware. It is pinned according to the RS-
232C/V.24 interface standard. For specific interface pin-outs, please
refer to the diagrams in Appendix D on page 37 of this manual.
The Model 1080ARC is wired to connect to a DTE. If your RS-232 out-
put device is a DTE, use a straight though cable to connect to the Model
1080ARC. If your RS-232 output device is DCE, call Technical Support
at (301) 975-1007 for specific installation instructions.
Twisted Pair Connection
The Model 1080ARC operates over one or two twisted pair. In all appli-
cations, the twisted pair wire must be 26 AWG or thicker, unconditioned,
dry, metallic wire. Both shielded and unshielded wire yield favorable
results.
23
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Note
The Model 1080ARC communicates in a closed data circuit with
another Model 1080ARC or other compatible modem. Dial-up
analog circuits, such as those used with a standard Hayes-type
modem, are not acceptable. For further information about
acceptable wire grades, please refer to the diagrams in
Point-to-Point Twisted Pair Connection
The 6-position RJ-11 and 8-position RJ-45 jack options for the Model
1080ARC are prewired for a standard TELCO wiring environment. Con-
nection of a 2-wire or 4-wire twisted pair circuit between two or more
Model 1080ARCs requires a crossover cable as shown in Table 27,
Table 28, Table 29, Table 30 and Figure 8.
Table 27: RJ-11/4-Wire
SIGNAL
PIN#
COLOR
COLOR
PIN#
SIGNAL
GND†
RCV-◊
XMT+
XMT-
1
2
3
4
5
6
Blue‡
Yellow
Green
Red
White
Red
6
4
5
2
3
1
GND
XMT-
RCV+
RCV-
XMT+
GND
Black
Yellow
Green
Blue
RCV+
GND
Black
White
Table 28: RJ-45/4-Wire
SIGNAL
PIN#
COLOR
COLOR
PIN#
SIGNAL
GND†
RCV-◊
XMT+
XMT-
2
3
4
5
6
7
Orange‡
Black
Brown
Green
Yellow
Black
7
5
6
3
4
2
GND
XMT-
RCV+
RCV-
XMT+
GND
Red
Green
Yellow
Brown
RCV+
GND
Red
Orange
Connection to ground is optional
Standard color codes yours may be different
◊The Model 1080ARC is not sensitive to polarity
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Table 29: RJ-11/2-Wire
SIGNAL
PIN#
COLOR
COLOR
PIN#
SIGNAL
XMT+◊
3
4
Green‡
Red
Green
Red
3
4
XMT+
XMT-
XMT-
Table 30: RJ-45/2-Wire
SIGNAL
PIN#
COLOR
COLOR
PIN#
SIGNAL
XMT+◊
4
5
Red‡
Red
4
5
XMT+
XMT-
XMT-
Green
Green
Standard color codes yours may be different
◊The Model 1080ARC is not sensitive to polarity
Figure 8. AT&T standard modular color codes
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Multipoint Twisted Pair Connection
The Model 1080ARC supports multipoint applications using a star topol-
ogy. Maximum distance between the units will vary based upon the
number of drops, data rate, wire gauge, etc. Call Patton Technical Sup-
port for specific distance estimates. Figure 9 and Figure 10 show how to
wire the one-pair and two-pair cables properly for a Model 1080ARC star
topology. Note that the ground connection is not needed.
Figure 9. Two-pair star wiring for Model 1080ARC host and slaves
Figure 10. Single-pair star wiring for Model 1080ARC host and slaves
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5.0 OPERATION
Once you have configured each Model 1080A properly and connected
the twisted pair and RS-232 cables (see section 4.0, “Installation” on
page 22), 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.
5.1 LED STATUS MONITORS
The Model 1080A features six front panel status LEDs that indicate the
condition of the modem and communication link. Figure 11 shows the
front panel location of each LED. Following Figure 11 is a description of
each LED's function.
Figure 11. The Model 1080ARC front panel, showing LEDs and switches
The “TD” and “RD” Indicators
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.
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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.
The “RTS” and “CD” Indicators
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.
The “Test” Indicator
The green “Test” LED indicates that V.52 or V.54 tests are running.
The “Error” Indicators
The “Error” indicator LED has three functions:
A. When the 1080A 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, “Antistreaming
Error Indicator” on page 29 for information on the antistreaming circuitry.
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.
3. The use of low quality twisted pair cable to connect the modems.
4. Broken or corroded connector.
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.
Setting Up The “Error” LED To Test Cable Quality
If there is any question as to the quality of your line we recommend the
following test:
1. Disconnect both local and remote modems from their RS-232 inter-
face. Make sure “TD”, “RD” and “RTS” LEDs are lit red.
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2. Set input impedance of both modems to 200. (S3-1 “On”, S3-2
“Off”)
3. Set data rate on both modems 9.6kbps. (S1-1 “On”, S1-2 “Off”, S1-
3 “Off”, S1-4 “On”)
4. On local modem set “Carrier Constantly On”. (S1-8 “Off”)
5. Set remote modem to RTS control (S1-8, “On”).
6. Place both front panel toggle switches to neutral position. (Test Led
will not light)
7. Connect both modems to the 4 wire twisted pair cable to be tested.
(see “Twisted Pair Connection” on page 23)
Reading The Test
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.
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.
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.
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 ANTISTREAMING ERROR INDICATOR
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’s anti-
streaming circuitry is enabled, the RTS signal from the DTE is timer con-
trolled. The timer begins to count when the DTE raises RTS. If the time
period that RTS remains high exceeds the preset timeout period, the
antistream circuit will force RTS low. The “Error” LED will light red, indi-
cating a streaming condition (RTS continually on). This feature prevents
a malfunctioning terminal from tying-up a computer port in a multidrop or
polling environment. When the DTE drops RTS, the antistreaming 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.
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5.3 POWER-UP
There is no power switch on the Model 1080ARC. Power is automati-
cally applied to the Model 1080ARC when its card-edge connector
makes contact with the chassis’ mid-plane socket, or when the chassis’
power supply is turned on.
Note
The Model 1080ARC is a “hot swappable” card—it will not be
damaged by plugging it in or removing it while the rack is pow-
ered up.
When the local and remote Model 1080ARCs are both powered up and
are passing data normally, the following LED conditions will exist:
• PWR = green
• TD & RD = flashing red and green
• RTS & CD = green
• TEST = off
5.4 TEST MODES
The Model 1080ARC offers two V.54 test modes and two V.52 test
modes to evaluate the condition of the modems and the communication
link. Both sets of tests can be activated physically from the front panel.
The V.54 test can also be activated from the RS-232 interface.
Note
V.54 and V.52 test modes on the Model 1080ARC are available
for point-to-point applications only.
Local Analog Loopback (LAL)
The Local Analog Loopback (LAL) test checks the operation of the local
Model 1080ARC, and is performed separately on each unit. Any data
sent to the local Model 1080ARC 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:
1. Activate LAL. This may be done in one of two ways: First, by mov-
ing the upper front panel toggle switch RIGHT to “Analog”. Second,
by raising pin 18 on the RS-232 interface (note: be sure DIP switch
S1-6 is enabled). Once LAL is activated, the Model 1080ARC trans-
mit output is connected to its own receiver. The “Test” LED should
be lit.
2. Verify that the data terminal equipment is operating properly and can
be used for a test.
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3. Locate the lower of the two toggle switches on the front panel of the
Model 1080ARC and move it to the right. This will activate the V.52
BER test mode and inject a “511” test pattern into the local loop. If
any errors are present in the loop, the red “Error” LED will blink spo-
radically.
4. If the BER test indicates no errors are present, move the V.52 tog-
gle switch to the left, thus activating the “511/E” test with periodic
errors. If the test is working properly, the red “Error” LED will blink
regularly. A successful “511/E” test will confirm that the loop is in
place, and that the Model 1080ARC’s built-in “511” generator and
detector are working properly.
5. If the BER test indicates that errors are present, check to see that
the RS-232 cable connecting the DTE to the Model 1080ARC is
wired straight through, and is plugged in properly. Also, ensure that
the Model 1080ARC is configured properly. Then re-check your
DTE equipment. If you still have errors, call Technical Support at
(301) 975-1007.
Remote Digital Loopback (RDL)
The Remote Digital Loopback (RDL) test checks the performance of both
the local and remote Model 1080ARCs, and the communication link
between them. Any characters sent to the remote 1080ARC in this test
mode will be returned back to the originating device. For example, char-
acters typed on the keyboard of the local terminal will appear on the local
terminal screen after having been passed to the remote Model 1080ARC
and looped back. To perform an RDL test, follow these steps:
1. Activate RDL. This may be done in two ways: First, by moving the
upper front panel toggle switch LEFT to “Remote”. Second, by rais-
ing pin 21 on the RS-232 interface.
2. Verify that the DTE equipment on the local end is operating properly
and can be used for a test.
3. Locate the lower of the two toggle switches on the front panel of the
1080ARC and move it to the right. This will activate the V.52 BER
test mode and inject a “511” test pattern into the remote loop. If any
errors are present in the loop, the red “Error” LED will blink sporadi-
cally.
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4. If the BER test indicates no errors are present, move the V.52 tog-
gle switch to the left, thus activating the “511/E” test with periodic
errors. If the test is working properly, the red “Error” LED will blink
regularly. A successful “511/E” test will confirm that the loop is in
place, and that the Model 1080ARC’s built-in “511” generator and
detector are working properly.
5. If the remote BER test indicates that errors are present, and the
local analog loopback/BER tests showed that both Model
1080ARCs were functioning properly, this suggests a problem with
the twisted pair communication line connecting the two modems. A
common problem is improper crossing of the pairs. Also, verify that
the modular connections are pinned properly, and the twisted pair
line has continuity. If you still have errors, call Technical Support at
(301) 975-1007.
Using The V.52 BER Test Independently
The Model 1080ARC's V.52 BER test can be used independent of the
V.54 loopback tests. This requires two operators: one to initiate and
monitor the test at both the local and the remote Model 1080ARC. To
use the V.52 BER test by itself, both operators should simultaneously fol-
low these steps:
1. Locate the lower of the two toggle switches on the front panel of the
Model 1080ARC and move it to the right. This will activate the V.52
BER test mode and transmit 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 independent test to function, the “511” switch on both
Model 1080ARCs must be turned on.
2. If the test indicates no errors are present, move the V.52 toggle
switch to the left, thus 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 1080ARC’s built-in “511”
generator and detector are working properly.
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APPENDIX A
SPECIFICATIONS
Transmission Format:
Internal Interface:
Synchronous or asynchronous, 2-
wire/half duplex, or 4-wire/full or half
duplex
Connection to Model 1000R16P rack
chassis via 50 pin male card edge
External Interface:
Transmission Line:
Data Rates:
DB-25 female; RJ-11 or RJ-45
2 or 4-wire UTP, 19 - 26 AWG
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
selected
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
Applications:
Indicators:
Point-to-point or multi-point
Bi-color LED indicators for TD, RD,
RTS & CD; single LED indicators for
Test and Error
Diagnostics:
V.52 compliant bit error rate pattern;
V.54 compliant—Local Analog Loop-
back and Remote Digital Loopback,
activated by front panel switch or via
RS-232 interface
Transformer Isolation:
Surge Protection:
Temperature:
1500 V RMS
Silicon Avalanche Diodes
0-50°C / 32-122°F
Humidity:
0-95%, non-condensing
0.95”w x 3.1”h x 5.4”l
Dimensions:
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APPENDIX B
CABLE RECOMMENDATIONS
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:
Wire Gauge
Capacitance
Resistance
19 AWG
22 AWG
24 AWG
26 AWG
83nF/mi or 15.72 pF/ft. .0163 ft.
83nF/mi or 15.72 pF/ft. .0326 ft.
83nF/mi or 15.72 pF/ft. .05165 ft.
83nF/mi or 15.72 pF/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 diffi-
culties in the field, one should ensure that the cable being used has sim-
ilar or better characteristics (lower capacitance or lower resistance).
Model 1080A Distance Table (miles)
Wire Gauge
Data Rate
57,600
38,400
28,800
19,200
14,400
9,600
19
12
22
24
26
7.0
5.3
4.0
4.2
4.6
5.1
6.5
7.5
8.0
8.8
8.8
9.0
8.9
8.9
13
7.5
6.2
14
8.0
6.6
16
8.5
7.0
17
11.0
13.0
13.5
14.0
14.5
15.0
15.0
15.0
9.2
18.5
19.0
19.5
20
10.4
10.9
11.3
11.5
11.6
11.5
11.4
7,200
4,800
3,600
2,400
20.5
20.5
20
1,800
1,200
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 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.
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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.
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APPENDIX C
1080ARC FACTORY REPLACEMENT PARTS
The Patton Model 1080ARC rack system features interchangeable rear
cards, power cords/fuses for international various operating environ-
ments and other user-replaceable parts. Model numbers, descriptions
and prices for these parts are listed below.
Patton Model #
Description
1000RPEM
120/240V Rear Power Entry Module
120/240V Front Power Supply Module
DC Rear Power Entry Module
1000RPSM-1
1000RPEM-DC
1000RPSM-48A 48V Front Power Supply Module
0805US
0805EUR
0805EURP
0805UK
0805AUS
0805DEN
0805FR
0805IN
American Power Cord
European Power Cord CEE 7
Europlug Power Cord CEE 7/16
United Kingdom Power Cord
Australia/New Zealand Power Cord
Denmark Power Cord
France/Belgium Power Cord
India Power Cord
0805IS
Israel Power Cord
0805JAP
0805SW
Japan Power Cord
Switzerland Power Cord
0516FPB1
0516FPB4
0516RPB1
0516RPB4
Single Width Blank Front Panel
4-Wide Blank Front Panel
Single Width Blank Rear Panel
4-Wide Blank Rear Panel
056S1
Set of 16 #4 pan head screws/washers
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APPENDIX D
1080ARC INTERFACE STANDARDS
DIRECTION
STANDARD RS-232C/V.24 DCE SETTING
DIRECTION
1 - (FG) Frame Ground
From 1080ARC Transmit Clock - 15
2 - (TD) Transmit Data
3 - (RD) Receive Data
To 1080ARC
From 1080ARC
From 1080ARC
To 1080ARC
Receive Clock - 17
Analog Loop - 18
4 - (RTS) Request to Send To 1080ARC
5 - (CTS) Clear to Send From 1080ARC
6 - (DSR) Data Set Ready From 1080ARC
7 - (SG) Signal Ground
To 1080ARC
To 1080ARC
Data Term. Ready
(DTR) - 20
Digital Loop - 21
8 - (DCD) Data Carrier
Detect
From 1080ARC
To 1080ARC
External Clock - 24
Test Mode - 25
From 1080ARC
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Notes
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Notes
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Notes
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Copyright © 2001
Patton Electronics Company
All Rights Reserved.
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