USER
MANUAL
MODEL 1075
KiloModem II AC
Powered, High-Speed
X.21 Short-Range Modem
Part #07M1075-B
Doc: 054081UB
Revised 6/16/97
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
C
E
R
T
I
F
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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 Customer Service at (301) 975-1007.
The Model 1075 is easy to install and is ruggedly designed for
excellent reliability. The following instructions will help you to properly
configure the Model 1075.
3.1 CONFIGURATION SWITCHES
The Model 1075 uses a unique set of 16 external mini DIP
switches that allow configuration to wide range of applications. The 16
external switches are grouped into two eight-switch sets, and are
externally accessible from the underside of the Model 1075 (See Figure
1).
2.1 FEATURES
• Data rates of 32, 56 and 64 kbps
• Distances to 6 miles (9.7km)
• Switch-selectable carrier control
• Synchronous X.21 operation
• Frequency Shift Keying (FSK) modulation
• DCE/DTE Switchable
• Point-to-point operation over 2 unconditioned twisted pair
• V.54 loopback tests and V.52 compliant BER tests
• 6 LED indicators
• Externally powered
• Transformer isolation
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
O N
O N
S1
S2
Front
Rear
• Silicon Avalanche Diode surge protection
• Made in the U.S.A.
2.2 DESCRIPTION
Figure 1. Underside of the 1075 Showing Location of DIP Switches
The two sets of DIP switches on the underside of the Model 1075
will be referred to as S1, S2. Figure 2 shows the orientation of DIP
Switches S1 and S2 with respect to “ON” and “OFF” positions.
The Model 1075 KiloModem II X.21 Short Range Modem
supports synchronous data rates of 32, 56 and 64 Kbps. Synchronous
transmit clock options are internal, external and receive recover clock.
Deriving power from a 9V DC wall-mount transformer, the Model 1075
supports extended distances to 6 miles (9.7km) over 2 unconditioned
twisted pairs.
ON
ON
The Model 1075 incorporates two V.54 test modes (local analog
loop and remote digital loop) that are activated by a tiny front panel
switch. In addition, a built-in V.52 Bit Error Test (BER) test generator
that outputs 511 and 511E bit patterns can also be controlled by a
switch on the case. Six LED indicators monitor transmit data, receive
data, control, indication, test mode (TM) and Error Status (ER). For
protection against ground loops and transient surges, the Model 1075
incorporates both isolation transformers and Silicon Avalanche Diode
surge suppressors.
OFF
1
2
3
4
5
6
7
8
Figure 2. Close-up of DIP Switches Showing “ON” / “OFF” Positions
Housed in a miniature ABS plastic case, the Model 1075 comes
equipped with a female DB-15 connector and a choice of twisted pair
interfaces (RJ-11 jack or RJ-45 jack).
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Switches S2-1 and S2-2: Data Rate
3.1.1 Configuration Switch Set “S1”
Switches S2-1 and S2-2 are set in combination to determine the
synchronous data rate for the Model 1075.
The switches on Switch S1 set V.54 Test Functions. Default
settings and detailed descriptions for each switch are shown below.
S2-1
Off
S2-2
On
Setting
32 kbps
S1 SUMMARY TABLE
Position
S1-1 thru S1-7
S1-8
Function
Not Assigned
Factory Default
On
On
Off
On
56 kbps
64 kbps
Off
V.54 Test Functions
Off
Enabled
Switches S2-3 and S2-4: System Clock Mode
Switches S1-1 through S1-7: Not Assigned
Switch S1-8: V.54 Test Functions
The setting for switches S2-3 and S2-4 determines the transmitter
clocking mode for the Model 1075.
S2-3
On
S2-4
On
Clock Mode
Internal
Description
System clock
generated internally
Switch S1-8 enables or disables the Model 1075 V.54 loopback
test modes.
S1-8
Off
Activation
Enabled
Description
V.54 test functions enabled
On
Off
Off
On
External (DTE)
System clock derived
from terminal interface
On
Disabled
V.54 test functions disabled
Receive Recover
System clock derived
from the received line
signal.
3.1.2
Configuration Switch Set “S2”
Switch S2-5: Carrier Control
The switches on Switch S2 set data rates, clock source, carrier
control and front panel switch operation. Default settings and detailed
descriptions for each switch are shown below.
S2-5
Off
Carrier
Always On
Description
Transmitter is always ON
On
Follows terminal
Transmitter controlled by “Control”
signal from X.21DTE (or by
S2 SUMMARY TABLE
“Indication” signal from X.21 DCE)
Position
S2-1
S2-2
S2-3
S2-4
S2-5
S2-6
S2-7
S2-8
Function
Data Rate
Factory Default
On
Switches S2-6 and S2-7: Not Assigned
56 kbps
}
Data Rate
Off
Switch S2-8: Front Panel Switch Enable/Disable
Clock Mode
On
Internal
}
Switch S2-8 determines whether the front panel switches may be
used to perform diagnostic functions.
Clock Mode
On
Carrier Control
Not Assigned
Not Assigned
Front Panel Switches
Off
Off
Off
On
Forced On
S2-8
On
Activation
Enabled
Description
Front panel switches may be used
to activate/terminate diagnostics.
Enabled
Off
Disabled
Front panel switches will have no
effect on operation of the unit.
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3.2.2 Location of the Internal Straps
3.2 CONFIGURATION STRAPS
Figure 5 (below) shows the location of the DCE/DTE switch and the
JP1 strap on top side of the the PC board.
In addition to the configuration switches described above, the
Model 1075 is also equipped with two internal straps that set the
DTE/DCE Configuration and the DB-15 Shield. In order to configure
these straps, you must open the Model 1075 case.
NOTE: Before opening the case, determine whether the default
settings are correct for your application (see Sections 3.2.3 and
3.2.4)
JP1 Strap
3.2.1 Opening the Case
Front
Rear
To open the Model 1075 insert a flat head screw driver into an
open slot on either side of the case, as in Figure 3. Twist the screw
driver head slightly and the top half of the case will separate from the
lower half, as in Figure 4, below.
DTE
D C E
DTE/DCE Strap
Figure 5 . Position of DTE/DCE and JP1 Jumper Straps on Model 1075 PC Board
3.2.3 Setting the DCE/DTE Strap
The X.21 interface on the Model 1075 is DCE/DTE switchable.
The default setting is DCE, based upon how the Model 1075 sees its
own orientation. When configured this way, the Model 1075 will want to
connect to an X.21 DTE device. Re-positioning the DCE/DTE strap will
enable the Model 1075 to connect to an X.21 DCE device (See Figure
6, below).
Figure 3. Opening the 1075 Case with a Small Screwdriver
DTE
D C E
Figure 6 . Close-Up of Model 1075 PC Board With Close-up of DCE/DTE Strap
Default Setting = “DCE”
The X.21 DCE/DTE strap is located near the DB-15 connector on
the PC board. The arrows on the top of the strap indicate the
configuration of the Model 1075. For example, if the DCE arrows are
pointing toward the DB-15 Connector, the Model 1075 is configured as
a “DCE” and must connect to an X.21 DTE device.
Figure 4. Opening the 1075 Case With a Small Screwdriver
To close the case, fit the 2 halves together snugly and snap them
back in place.
To change the DCE/DTE orientation of the Model 1075 X.21
interface, simply remove the strap and rotate it 180o so the appropriate
arrows are pointing toward the DB-15 Connector.
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4.0 INSTALLATION
3.2.4 Setting the JP1 Shield Strap
When you have properly configured the configuration switches and
straps, you are ready to connect the Model 1075 to connect to your
system. This section tells you how to properly connect the Model 1075
to the twisted pair.
The setting of JP1 determines whether the shield (pin 1) of the
X.21 interface is connected signal ground. In the default setting, DB-15
shield is connected to signal ground. The X.21 shield is not connected
to signal ground when the jumper is placed on pins 1 and 2 . See
Figure 7, below.
4.1 CONNECTION TO THE TWISTED PAIR INTERFACE
The Model 1075 supports full or half duplex communication
between two X.21 devices at distances to 6 miles (9.7 km) and data
rates to 64 kbps. There are two essential requirements for installing
the Model 1075:
1
Front
2
1. These units work in pairs. Therefore, you must have one
Model 1075 (or compatible unit) at each end of a two twisted
pair interface.
Rear
3
2. To function properly, the Model 1075 needs two twisted pairs
of metallic wire. These pairs must be unconditioned, dry
metallic wire, between 19 and 26 AWG (the higher number
gauges may limit distance somewhat). Standard dial-up
telephone circuits, or leased circuits that run through signal
equalization equipment, are not acceptable.
Figure 7. Jumper JP1 Orientation on the PC board
Jumper 1: DB15 Shield
Position
1-2
2-3
DB15 Shield
Not connected to signal ground
Connected to signal ground (default)
For your convenience, the Model 1075 is available with two
different twisted pair interface options: RJ-11 jack or RJ-45 jack.
4.1.1 Twisted Pair Connection Using RJ-11 OR RJ-45
The RJ-11 and RJ-45 connectors on the Model 1075's twisted pair
interface are pre-wired for a standard TELCO wiring environment. The
signal/pin relationships are shown below.
RJ-11
SIGNAL
RJ-45
SIGNAL
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
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4.3 AC POWER CONNECTIONS
When connecting two Model 1075s, it is necessary to use a "cross-
over" cable. The diagram below shows how a cross-over cable should
be constructed for an environment where both Model 1075s use a 8-
wire RJ-45 connector. Similar logic should be followed when using RJ-
11 connectors or a combination of the two.
Power is supplied to the Model 1075 by a 9 VDC, 1 A wall mount
transformer. This transformer connects to the Model 1075 by means of
a cannon jack on the rear panel. The Model 1075 is powered-up as
soon as it is plugged into an AC outlet–there is no power switch.
RJ-45 Cable (8-Wire)
120 VAC Power (US)
SIGNAL
PIN#
PIN#
SIGNAL
The 120 VAC adapter supplied with the standard version of the
Model 1075 is a “wall mount” type, and may be plugged into any
approved 120 VAC wall plug.
N/C
1
1
N/C
GND†
RCV
XMT
XMT
RCV
GND†
N/C
2-----------------------7
3-----------------------5
4-----------------------6
5-----------------------3
6-----------------------4
7-----------------------2
GND†
XMT
RCV
RCV
XMT
GND†
N/C
230 VAC Power (IEC)
The 230 VAC adapter supplied with the international version of the
Model 1075 is equipped with an IEC-320 shrouded male connector.
This connects with one of several available country-specific power
cords (see the ordering information in Appendix C.) You may
purchase these power cords from Patton Electronics at: (301) 975-
local vendor.
8
8
†Connection to ground is optional
1
2
3
4
5
6
7
8
1
2
3
4
5
6
Figure 8. Pin Number Assignments for RJ11 and RJ45 Modular Jacks
4.2 CONNECTION TO X.21 INTERFACE
To connect the Model 1075 to a piece of data terminal or data
communications hardware, use a straight through DB-15 cable. Plug
the cable directly into the DB-25 port on the rear of the Model 1060.
If it is necessary to construct a special interface cable, please refer to
the pinout diagrams in Appendix C.
Notice! Any terminal cable connected to the Model 1075
must be shielded cable, and the outer shield must be 360
degree bonded–at both ends–to a metal or metalized backshell.
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5.0 OPERATION
5.2 TEST MODES
Once the Model 1075 is properly configured and installed, it should
operate transparently—as if it were a standard cable connection.
Section 5.0 describes the LED status monitors and the built-in V.52 and
V.54 test modes. The Model 1075 is powered by a 9V DC external wall
mount transformer. To power up the unit, connect the power supply
cord to the power jack on the rear of the Model 1075 and plug the
power adapter into the wall. There is no ON/OFF switch.
The Model 1075 offers two V.54 test modes to evaluate the
condition of the modems and the communication link. These tests are
activated from the front panel.
5.2.1 Local Analog Loopback (LAL)
The Local Analog Loopback (LAL) test checks the operation of the
local Model 1075, and is performed separately on each unit. Any data
sent to the local Model 1075 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.
5.1 LED STATUS MONITORS
The Model 1075 features six front panel LEDs that indicate the
status of the unit and the communication link. Figure 9 shows the front
panel location of each LED. Following Figure 9 is a description of each
LEDs function.
A. Activate LAL. This may by moving the front panel toggle
switch DOWN to LAL. Once LAL is activated, the Model 1075
transmitter output is connected to its own receiver. The test
LED should be lit.
Model 1075 KiloModem-II 56/64K Baseband Modem
V.54 Test
(Control)
RTS
(Ind)
CD
Modes
511 -
511E -
TD
RD
Error
Test
- Remote
- Normal
- Local
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.
Figure 9 - Front Panel of the Patton Model 1075
C. Perform a Bit Error Rate (BER) 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 interface
cable between the terminal and the Model 1075.
TD
(Transmit Data) Glows red to indicate an idle condition
or binary 1 data. Glows green to indicate an active
condition or binary 0 data. Glows orange to indicate
rapidly changing data. Source: DTE.
5.2.2 Remote Digital Loopback (RDL)
RD
(Receive Data) Glows red to indicate an idle condition
or binary 1 data. Glows green to indicate an active
condition or binary 0 data. Glows orange to indicate
rapidly changing data. Source: DCE.
The RDL test checks the performance of both the local and remote
Model 1075, and the communication link between them. Any
characters sent to the remote Model 1075 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 1075 and looped
back. To perform an RDL test, follow these steps:
Control
Glows green to indicate that Control from DTE is active.
Red indicates that Control from the DTE is inactive.
Indication Glows green to indicate that the Indication from DCE is
active. Red indicates that the Indication from the DCE
is inactive.
A. Activate RDL by moving the front panel toggle switch UP to
RDL.
Error
Test
Glows red when errors are detected during the 511 or
511/E BER tests.
B. Perform a BER test on the system.
Glows red when the V.54 loopback test or V.52 BER
tests are initiated.
(cont)
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APPENDIX A
C. If the BER test equipment indicates a fault, and the Local
Analog Loopback test was successful for both Model 1075s,
you may have a problem with the twisted pair line between the
modems. You should then check the twisted pair line for
proper connections and continuity.
PATTON MODEL 1075 SPECIFICATIONS
Approvals:
CE European Directives
DTE/DCE I/F:
X.21 DB15F DCE or DTE, EIA RS-422
Compliant
5.2.3 How to Use the V.52 BER Test Independently
Compatibility:
Transmission
Format:
Transmission
Line Interface:
1035, 1045 , 1075, 1080A, 1090 series units
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 Model 1075, and one at the remote Model 1075. To use the
V.52 BER test by itself, both operators should simultaneously follow
these steps:
Synchronous
Unconditioned twisted pair 19 - 26 AWG
Externally accessible RJ-45 (RJ-11
Optional)
Clock
Internal, External and Network (Receive
Recover)
Up to 6 miles (9.7km)
1. Locate the 511/511E toggle switch on the front panel of the
1075 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. For this test to work, make sure the 511 switch
on both Model 1075s is on.
Distance:
Interfaces:
Data Rates:
Isolation:
Surge Protection:
Carrier Control
CCITT/ITU X.21
32, 56 and 64 Kbps (switch selectable)
1500V RMS via isolation transformers
IEC-801-S, Level 2, 1kV
Constantly on or Controlled by “Control”
from DTE device (DCE mode) or
“Indication” from DCE device (DTE mode)
DB-15 female
2. If the test indicates no errors are present, move the V.52
toggle switch DOWN, activating the 511/E test with 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 1075’s
built in 511 generator and detector are working properly.
Connectors:
RJ-11 or RJ-45 on line side
9V DC wall-mount transformer, 200mA
Power Supply:
Temperature
Range:
0-60°C (32-140°F)
Altitude:
Humidity:
Dimensions:
Power Options:
0-15,000 feet
5 to 95% noncondensing
1.54H x4.1”W x 3.7”D
120 VAC 50/60Hz, external transformer;
230 VAC 50/60Hz, external transformer
2.5 lbs. (1.1 Kg)
5.3 POWER-DOWN
There is no power switch on the Model 1075. You turn it off by
unplugging the AC power adapter from the wall.
Weight:
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APPENDIX B
APPENDIX C
MODEL 1075 FACTORY REPLACEMENT
PARTS AND ACCESSORIES
MODEL 1075 X.21 Interface
DB15 Female
Patton Model #
Description
Pin
Signal
Source
1
2
3
4
5
6
7
8
Shield
-
1075 ................................KiloModem II X.21 Short Range Modem
0805B..............................120V Wall Mount AC Adapter
08059DCI ........................230V AC Adapter (No Power Cord)
0805US ...........................American Power Cord
0805EUR.........................European Power Cord CEE 7
0805UK ...........................United Kingdom Power Cord
0805AUS.........................Australia/New Zealand Power Cord
0805DEN.........................Denmark Power Cord
0805FR............................France/Belgium Power Cord
0805IN.............................India Power Cord
0805IS.............................Israel Power Cord
0805JAP..........................Japan Power Cord
0805SW...........................Switzerland Power Cord
Transmit (a)
Control (a)
Receive (a)
Indication (a)
System Clock (a) DCE
-
Signal Ground
Transmit (b)
Control (b)
Receive (b)
Indication (b)
System Clock (b) DCE
-
-
DTE
DTE
DCE
DCE
-
-
9
DTE
DTE
DCE
DCE
10
11
12
13
14
15
-
-
17
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APPENDIX D
Dear Valued Customer,
Thank you for purchasing Patton Electronics products! We do
MODEL 1075 PIN CONFIGURATIONS
BLOCK DIAGRAM
appreciate your business. I trust that you find this user manual helpful.
We manufacture one of the widest selections of data communications
products in the world including CSU/DSU's, network termination units,
powered and self-powered short range modems, fiber optic modems, interface
converters, baluns, electronic data switches, data-line surge protectors,
multiplexers, transceivers, hubs, print servers and much more. We produce
these products at our Gaithersburg, MD, USA, facility, and can custom
manufacture products for your unique needs.
We would like to hear from you. Please contact us in any of the
following ways to tell us how you like this product and how we can meet your
product needs today and in the future.
Web:
(301) 975-1000
(301) 975-1007
(301) 869-9293
Sales E-mail:
Support E-mail:
Phone - Sales
Phone - Support
Fax:
Mail:
Patton Electronics Company
7622 Rickenbacker Drive
Gaithersburg, MD 20879 USA
We are committed to a quality product at a quality price. Patton
Electronics is BABT and ISO 9001 certified. We meet and exceed the highest
standards in the industry (CE, UL, etc.).
It is our business to serve you. If you are not satisfied with any
aspect of this product or the service provided from Patton Electronics or its
distributors, please let us know.
Thank you.
Burton A.Patton
Vice President
P.S. Please tell us where you purchased this product:
Copyright ©
Patton Electronics Company
All Rights Reserved
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