Patton electronics Patton SmartNode 2400 Series User manual

USER
MANUAL
MODEL 2400
56/64 Kbps, 4-Wire DDS
and Clear Channel CSU/DSU
SALES OFFICE
[phone]
TECHNICAL SUPPORT
[phone]
http://www.patton.com
Part# 07M2400-B
Doc# 099041UB
Revised 7/16/97
CERTIFIED
An ISO-9001
Certified Company

1.0 WARRANTY INFORMATION
Patton Electronics warrants all Model 2400 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 specifically 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 RADIO AND TV INTERFERENCE
The Model 2400 generates and uses radio frequency energy, and if
not installed and used properly—that is, in strict accordance with the
manufacturer's instructions—may cause interference to radio and
television reception. The Model 2400 has been tested and found to
comply with the limits for a Class A computing device in accordance
with the specifications in Subpart J of Part 15 of FCC rules, which are
designed to provide reasonable protection from such interference in a
commercial installation. However, there is no guarantee that
interference will not occur in a particular installation. If the Model 2400
does cause interference to radio or television reception, which can be
determined by disconnecting the RS-232 interface, the user is
encouraged to try to correct the interference by one or more of the
following measures: moving the computing equipment away from the
receiver, re-orienting the receiving antenna and/or plugging the
receiving equipment into a different AC outlet (such that the computing
equipment and receiver are on different branches). In the event the
user detects intermittent or continuous product malfunction due to
nearby high power transmitting radio frequency equipment, the user is
strongly advised to only use data cables with an external outer shield
bonded to a metal or metalized connector.
1.2 FCC INFORMATION
The Model 2400 Series has been tested and registered in
compliance with the specifications in Part 68 of the FCC rules. A label
on the equipment bears the FCC registration number. You may be
requested to provide this information to your telephone company.
1
Your telephone company may make changes in its facilities,
equipment, operations or procedures that could affect the proper
operation of the Model 2400 Series. If this happens, the telephone
company should give you advance notice to prevent the interruption of
your service.
The telephone company may decide to temporarily discontinue
your service if they believe your Model 2400 Series may cause harm to
the telephone network. Whenever possible, they will contact you in
advance. If you elect to do so, you have the right to file a complaint
with the FCC. The telephone company may ask you to disconnect the
equipment from the telephone network until the problem has been
corrected or until you are certain that the Model 2400 Series is not
malfunctioning.
The following information may be required when applying to your
local telephone company for leased line facilities.
Service Digital Facility Service Order Network
Type Interface Code Code Jacks
56 Kbps 04DU5-56 6.0F RJ48S
64 Kbps 04DU5-64 6.0F RJ48S
1.3 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.
1.4 SERVICE INFORMATION
All warranty and non-warranty repairs must be returned freight
prepaid and insured to Patton Electronics. All returns must have a
Return Materials Authorization number on the outside of the shipping
container. This number may be obtained from Patton Electronics
Technical Support: [phone]; http://www.patton.com; or,
[email protected]. Notice: Packages received without an RMA
number will not be accepted .
Patton Electronics' technical staff is also available to answer any
questions that might arise concerning the installation or use of your
Model 2400. Technical Service hours: 8AM to 5PM EST, Monday
through Friday.
2

2.0 GENERAL INFORMATION
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 arise during
installation or use of the 2400, contact Patton Electronics Technical
Support at [phone].
2.1 FEATURES
• Synchronous data rates of 56 or 64 Kbps
• Full duplex communication over two dedicated twisted pairs
• Supports distances to 3.4 miles (5.5 km) over 26 AWG
(.4 mm)wire
• Selectable internal, external, network receive recover, or
campus clock options
• Built-in V.54 loopback tests and V.52 BER test patterns
• Works with 56 Kbps DDS, 64 Kbps Clear Channel, or private
twisted pair circuits
• Switchable Circuit Assurance feature
• Seven front panel LEDs monitor power, communication and test
status
• RJ-48S jack provided for line connection
• RS-232 version has a DB-25 connector
• V.35 version has an M/34 connector
• Ultra-compact enclosure fits in tight spaces
2.2 DESCRIPTION
The Model 2400 DDS & Clear Channel CSU/DSU is a miniature
CSU/DSU that is designed for 56 kbps or 64 kbps Clear Channel
communications over a synchronous DDS circuit -- or over dedicated
twisted pair. The Model 2400 also supports distances up to 3.4 miles
(5.5 km) over a dedicated twisted pair circuit.
The Model 2400 provides switch selectable timing options of
internal, external, and network receive-recovered clock. Connecting
directly to the RS-232/V.24 (Model 2400/A) or V.35 (Model 2400/C)
port, the ultra-compact Model 2400 attaches without using additional
cables.
The Model 2400’s built-in V.54 loopback test modes and V.52 BER
test patterns are accessed using two front panel switches. Seven LEDs
monitor power, test modes and communication status. Twisted-pair line
connections are facilitated by a modular RJ-48S jack on the rear of the
unit.
3
3.0 CONFIGURATION
The Model 2400 is easy to install and is ruggedly designed for
excellent reliability. The following instructions will help you set up and
install the Model 2400 properly.
Both versions of the Model 2400 use a mini DIP switch package
and jumper strap that allow configuration to a wide range of
applications. To configure the Model 2400 for use in your application,
you must first configure the unit. To do so, first open the case by
inserting a flat head screw driver into an open slot on either side of the
case, as in Figure 1.
Twist the screw driver head slightly and the top half of the case will
separate from the lower half, as in Figure 2. You now have access to
the internal switches used to configure the unit.
After opening the case, please refer to Sections 3.1 and 3.2 to set
the configuration switches and jumpers.
To close the case, fit the 2 halves together snugly and snap them
back in place.
4
Figure 1. How to Use a Small Flathead Screwdriver to Begin to Open the Model 2400 Case
Figure 2. How to Use a Small Flathead Screwdriver to Finish Opening the Model 2400 Case

Switches S1-1 and S1-2: Clock Mode
The setting for switches S1-1 and S1-2 determines the transmitter
clocking mode for the Model 2400.
S1-1 S1-2 Clock Mode Description
On Off External (DTE) Transmit clock derived
from terminal interface
Off On Network (Looped) Transmit clock derived
from the received line
signal; Use this mode
for Dedicated DDS
operation
Off Off Internal (Master) Transmit clock derived
internally
On On Campus Clock Transmit clock derived
from received line signal.
Allows remote device (in
campus clock mode) to
initiate V.54 loopback. For
use only in campus short-
haul configuration (Note:
Opposite device must be
in internal clock mode).
6
3.1 CONFIGURATION SWITCH SET ‘S1’
The Model 2400 uses a set of eight internal switches to set
clocking mode, circuit assurance, RTS control, data rate and loop
control. Figures 3 (Model 2400/A) and 4 (Model 2400/C) show the
switch and jumper locations with respect to the other components on
bottom side the PC board.
Figure 5 (below) shows a close-up of DIP Switch S1 with respect to
ON and OFF positions. Default switch settings are shown in the table
on the following page. Descriptions of each switch follow the table.
5
SWITCH SET 1 SUMMARY TABLE
Position Function Factory Default
S1-1 Clock Mode Off
S1-2 Clock Mode On
S1-3 Circuit Assurance Off Disabled
S1-4 RTS On Forced On
S1-5 Data Rate Off 56 Kbps
S1-6 Front Panel Switch Off Enable Front Panel
Control Switches
S1-7 DTE Loop Control On Loop Control
From DTE Disabled
S1-8 Receive RDL Off Receive RDL
Enabled
Network
}
Figure 5. Close-up of DIP Switches Showing “ON” and “OFF” Positions
12345678
ON
OFF
ON
ON
12345678
ON
12345678
Figure 3. Position of the DIP Switches on the 2400/A PC board
Figure 4. Position of the DIP Switches on the Model 2400/CM PC board
Switch S1
Switch S1

Switch S1-3: Circuit Assurance
On dedicated circuits, the transmitter and the CTS output can be
configured to go on only when a working communication circuit is
established. If Circuit Assurance is used, enable it on only one end of
the communication link.
Circuit
S1-3 Assurance Description
On Enabled CTS will go low and the
transmitter will be held off if the
receiver is in the No Signal state
or CD is low
Off Disabled The transmitter and CTS will
operate without regard to the
receiver state
Switch S1-4: RTS Control
The RTS input can be forced on, ignoring the terminal's RTS
signal. RTS controls the transmitter by either sending the user’s data
or sending an idle code.
S1-4 RTS Description
On Forced On Transmitter is always ON
Off Follows The RTS input controls the
DTE Signal transmitter
Switch S1-5: Data Rate
This switch controls the data rate on the line (RJ-48S port) and
should match the speed of your digital service.
S1-5 Setting
Off 56 Kbps
On 64 Kbps
NOTE: Power must be cycled off and then on to reset the Data
Rate.
Switch S1-6: Front Panel Switch Enable/Disable
Switch S1-6 determines whether the front panel switches may be
used to perform diagnostic functions.
S1-6 Activation Description
Off Enabled Front panel switches may be used
to activate/terminate diagnostics
On Disabled Front panel switches will have no
effect on operation of the unit
Switch S1-7: DTE Loop Request Line Enable/Disable
The setting for switch S1-7 determines whether the front panel
switches (and DTE lines) can be used to activate/terminate the
loopback diagnostic modes and BER test patterns.
DTE TM Line
S1-7 Activation Description
Off Enabled DTE Loop request line switches
may be used to activate/terminate
diagnostics.
On Disabled DTE loop request lines will
have no effect on operation of
the unit.
Switch S1-8: Receive RDL Enable/Disable
Switch S1-8 determines whether or not the unit will respond to
loop requests from the remote device.
S1-8 Activation Description
Off Enabled Unit will respond to loop requests
from the remote device.
On Disabled Unit will ignore loop requests from
the remote device.
87

3.2 INTERFACE POWER OPTION JUMPERS
Both versions of the Model 2400 can be powered from the supplied
AC power source, from DC power supplied to the power supply jack or
directly from the local RS-232/V.24 (Model 2400/A) or V.35 (Model
2400/C) interface. To configure the unit to receive power from the local
interface, please refer to Sections 3.2.1 (Model 2400/A) and 3.2.2
(Model 2400/C).
3.2.1 Interface Power Option (Model 2400/A)
Two jumper straps (JP1 and JP2) are used in combination to set
the Model 2400/A to receive its power from the RS-232 interface.
Figure 6 shows the position of JP1 and JP2 on the top side of the
Model 2400/A PC board.
Figure 7 below shows the orientation of the pins on the six pin
jumper block and possible settings of jumper straps JP1 and JP2.
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NOTE: “*” indicates Factory Default Setting
JP1: DC Power Supplied by Pin 9
The Model 2400/A may be configured to receive its operating
power from by pin 9 on the RS-232 interface. In the normal setting,
pin 9 is not used for interface power.
JP1
Position 1 & 4 Normal (default)
Position 4 & 5 Pin 9 Used for Interface Power. In this setting
the 2400/A is powered from the DTE
interface. Power should be applied to pin 9
at +5VDC (±5%), 200mA. The AC wall-
mount transformer must not be connected
in this setting.
NOTE: The only allowable positions for Jumper JP1 are as listed
above.
JP2: DC Power Supplied by Pin 21
The Model 2400/A may be configured to receive its operating
power from by pin 21 on the RS-232 interface. In the normal setting,
pin 21 is used for its normal function.
JP2
Position 5 & 6 Pin 21 Used for Interface Power. In this setting
the 2400/A Series unit is powered from the
DTE interface. Powered should be applied to
pin 9 at +5VDC (±5%), 200mA. The AC
wall-mount transformer must not be
connected in this setting.
Position 3 & 6 Normal (default)
NOTE: The only allowable positions for Jumper JP2 are as listed
above.
9 10
Figure 7. Possible Settings of Jumper Strap JP1 for Model 2400/A
JP1 JP2
Figure 6. Position of the DIP Switches on the 2400/A PC board
Switch S1
WARNING: The Model 2400 will be damaged and will not be
covered by warranty if any other power supply input than 5VDC
±5% is used with the Interface Power Option.
5
2
6
31
4
POSSIBLE SETTING COMBINATIONS FOR JP1 & JP2
JP1 JP2 Function
1 & 4 5 & 6 DC Powered by Pin 21
1 & 4 3 & 6 Normal*
4 & 5 3 & 6 DC Powered by Pin 9

3.2.2 Interface Power Option (Model 2400/C)
One jumper strap (JP1) is used to set the Model 2400/C to
receive its power from the V.35 interface. Figure 8 shows the position
of JP1 on the bottom top of the Model 2400/C PC board.
Figure 9, below, shows the orientation of the pins on the six pin
jumper block and possible settings of jumper straps JP1 and JP2.
JP1: DC Power Supplied by Pin KK
The Model 2400/C may be configured to receive its operating
power from pin KK on the V.35 interface. In the normal setting, pin KK
is not used for interface power.
JP1
Position 1&2 Interface Power Option. In this setting the
2400/A Series unit is powered from the DTE
interface. Powered should be applied to pin 9
at +5VDC (±5%), 200mA. The AC wall-
mount transformer must not be connected
in this setting.
Position 3&4 Normal
4.0 INSTALLATION
The Model 2400 is designed for 4-wire, full duplex communication
over a DDS or Clear Channel carrier circuit, or over dedicated twisted
pair. This section will describe proper connection of the line interface,
the DTE (terminal) interface, and the AC power supply.
4.1 LINE (NETWORK) CONNECTION
The RJ-48S port on a Model 2400 CSU/DSU is prewired for a
standard TELCO wiring environment as in Figure 4, below. Connect this
port to the RJ-48S jack provided by your digital service carrier using a
straight through twisted pair cable between 19 and 26 AWG. To be
sure you have the right wiring, use Figure 10, below, as a guide.
4.1.1 CONNECTING OVER PRIVATE TWISTED PAIR
If you are using a pair of Model 2400s as short range modems over
private twisted pair, make the connection between them using a twisted
pair crossover cable pinned according to Figure 11, below.
RJ-48S Cable (4-Wire)
SIGNAL PIN# PIN# SIGNAL
TX+ 1-----------------------7 RX+
TX- 2-----------------------8 RX-
RX+ 7-----------------------1 TX+
RX- 8-----------------------2 TX
11 12
Figure 11. RJ-48S Cable Signal and Pin Numbers for the Model 2400
1 (TX+)
2 (TX-)
3 (N/C)
4 (N/C)
5 (N/C)
6 (N/C)
7 (RX+)
8 (RX-)
1
2
3
4
5
6
7
8
Figure 10. Prewired TELCO Wiring on the RJ-48S Port on Patton Model 2400
Figure 8 Position of the DIP Switches on the 2400/C PC board
Jumper JP1
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Figure 9. Possible Settings of Jumper Strap JP1 for Model 2400/C
12
3 4
JP1
Pin 1
Oriented at
top left of
jumper
block

4.2 DTE (TERMINAL) CONNECTION
The Model 2400 is wired to connect to a DTE. If your terminal
device is DCE, contact Patton Electronics Technical Support: (301)
975-1007; http://www.patton.com; or, [email protected].
for specific installation instructions.
The Model 2400 is designed for direct connection to the DTE
without the use of a cable and is available in two interface options --
RS-232/V.24 and V.35. If it is necessary to construct or purchase your
interface cable, refer to the pinout diagrams in Appendix D.
4.3 POWER CONNECTION
The Model 2400 can be powered from the supplied AC power
source, from DC power supplied to the power supply jack or directly
from the local RS-232/V.24 (Model 2400/A) or V.35 (Model 2400/C)
interface. This section describes the available power options.
120 VAC Power (US)
The 120 VAC adapter supplied with the standard version of the
Model 2400 is a wall mount type and may be plugged into any
approved 120 VAC wall plug.
230 VAC Power (IEC)
The Universal Input Adapter adapter supplied with the
“International” version of the Model 2400 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, or
from a local vendor of your choice.
(continued)
4.3.2 DC POWER CONNECTION
You may bypass the AC wall adapters and supply DC power directly
to the Model 2400 power supply jack or via the DTE Supplemental
Power Input pins. The AC wall-mount transformer must not be
connected when the Model 2400 is powered by DC.
DC Power Supplied to Power Jack
You may supply DC power directly to the power supply jack. DC
power supplied must be 5VDC ±5%, 200mA, center positive, and can
be supplied via a barrel type plug with 2.1/5.5/10mm I.D./O.D./Shaft
Length dimensions.
Interface Power
The Model 2400 may also be powered by means of the RS-
232/V.24 (Model 2400/A) or V.35 (Model 2400/C) interface signals. DC
Power supplied to the interface pins must be at +5VDC (±5%), 200mA.
See Sections 3.2.1(Model 2400/A) and 3.2.2 (Model 2400/C) to
configure the unit to receive interface power.
NOTE: DC power source must be SELV (Circuit, Safety Extra Low
Voltage) specified. (See CENELEC EN60950, Section 1.2.8.5)
1413
WARNING: The Model 2400 will be damaged and will not be
covered by warranty if any other power supply input than 5VDC
±5% is used with the Interface Power Option.

5.2 BACK PANEL LED STATUS MONITORS
The Model 2400 also features two LEDs that are located on the
back panel. Figure 8 below shows the positions of the LEDs. Following
Figure 13 is a description of each LED.
• RD (Receive Data) is off to indicate an Idle condition or Binary
“1” data. Green indicates Binary 0 data.
• NS (No Signal) glows green when there is no valid carrier.
This means the Model 2400 receiver does not detect a valid
signal from the digital service provider, or, in the case of short-
haul operation, from the remote Model 2400. If NS is lit, check
for an unplugged cable, broken wire or an incorrect Line Rate
selection.
5.3 TEST MODES
The Model 2400 offers two V.54 test modes, plus a built-in V.52
BER test pattern generator, to evaluate the condition of the modems
and the communication link. These tests can be activated physically
from the front panel, or via the interface.
5.0 OPERATION
Once you have configured the Model 2400 properly (see Section
3.0) and made line, DTE and power connections correctly (see Section
4.0), you are ready to operate the unit(s). This section describes the
LED status monitors, and use of the built-in V.54 and V.52 test modes.
5.1 FRONT PANEL LED STATUS MONITORS
The Model 2400 features five front panel status LEDs that indicate
the condition of the unit and communication link. Figure 12 below
shows the front panel location of each LED. Following Figure 12 is a
description of each LED.
• PWR (Power) glows green when power is supplied to the unit.
The unit is operational as soon as power is applied--there is
no power switch.
• TD (Transmit Data) is off to indicate an Idle condition or Binary
“1” data. Red indicates Binary 0 data.
• CD (Carrier Detect) glows red when carrier is active. In 64
Kbps mode, CD is off if there is no carrier. In 56 Kbps mode,
CD is off if there is no carrier, if an Out-of-Service or Out-of-
Frame violation occurs, or if idle code is detected.
• BERT glows red when errors are detected in test mode during
the 511and 511/E tests. This indicator also glows during
normal operation to indicated framing errors and/or bipolar
violations in 64 Kbps mode, or invalid bipolar violations in 56
kbps mode.
• LOOP glows red when the V.54 loopback tests or V.52 BER
tests are initiated or when CO loopback is initiated by the
service provider.
15 16
RD
NS
Power Jack
RJ48S Jack
Figure 13. Model 2400’s back panel LED indicators
Figure 12. Model 2400’s front panel LED indicators and test switches
TD
CD
PWR BERT LOOP
511/E RDL
NORMAL
511 LAL

5.3.1 Using Local Analog Loopback (LAL)
The Local Analog Loopback (LAL) test checks the operation of the
local Model 2400, and is performed separately on each unit. Any data
sent to the local Model 2400 from the DTE in this test mode will be
echoed (returned) back to the DTE. 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
moving the front panel toggle switch DOWN to “LAL.” ;
second, by raising the appropriate pin on the terminal
interface (pin 18 for Model 2400/A, pin L for Model 2400/C).
Make sure DIP switches S1-6 and S1-7 are OFF. Once LAL is
activated, the Model 2400 transmitter 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. If a fault is indicated, call a
technician or replace the unit.
3. Perform a V.52 BER (bit error rate) test as described in
Section 5.3.3. 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 2400.
5.3.2 Using Remote Digital Loopback (RDL)
The Remote Digital Loopback (RDL) test checks the performance
of both the local and remote Model 2400s, and the communication link
between them. Any characters sent to the remote Model 2400 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
2400 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 front panel toggle switch UP to “RDL”; second, by raising
the appropriate pin on the terminal interface (pin 21 for Model
2400/A, pin N for Model 2400/C). Make sure S1-6 and S1-7
are OFF.
NOTE: to activate RDL by pin 21 on the Model 2400/A, Jumper
JP2 must be set in the “NORMAL” setting (see Section 3.2.1)
2. Perform a V.52 BER test as described in Section 5.3.3. If the
BER test equipment indicates a fault, and the Local Analog
Loopback test was successful for both Model 2400s, 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.
5.3.3 Using the V.52 BER Test
To use the V.52 BER tests in conjunction with the V.54 loopback
tests, follow these instructions:
1. Locate the 511/511E toggle switch on the front panel of the
2400 and move it DOWN. This activates the V.52 BER test
mode and transmits a 511 test pattern into the loop. If any
errors are present, the local modem’s red “Error” LED will blink
sporadically.
2. If the above test indicates no errors are present, move the
V.52 toggle switch UP, activating the “511/E” test with
errors present. If the test is working properly, the local
modem's red BERT LED will glow. A successful “511/E” test
will confirm that the link is in place, and that the Model 2400’s
built-in 511 generator and detector are working properly.
NOTE: The above V.52 BER tests can be used independently of
the V.54 loopback tests. This requires two operators: one to initiate
and monitor the tests at the local Model 2400, and one to do the
same at the remote Model 2400. In this case, the test pattern sent
by each Model 2400 will not be looped back, but will be transmitted
down the line to the other Model 2400. Both operators must initiate
and monitor the tests simultaneously.
17 18

APPENDIX A
PATTON MODEL 2400 SPECIFICATIONS
DDS Type: Dedicated
Transmission Format: Synchronous, full duplex
Maximum Operating
Distance: 3.4 miles (5.5 km) over 26 AWG
(.4mm) twisted pair
DTE Interface: RS-232 (DB-25 female or DB-25 male), or
V.35 (M/34 male)
DDS Line Interface: RJ-48S jack
Standards: AT&T 62310 compliant
DTE Rates: 56 and 64 kbps
Transmission Line: 4-wire
Applications: DDS, point-to-point or multipoint; Clear
Channel, point-to-point; campus-area point-
to-point
Indicators: LED indicators for TD, RD, CD, No Signal,
Error, Test Mode, and Power
Diagnostics: V.54 compliant local and remote loopback
tests; V.52 compliant 511/511E BER test
Power Supply: 120 VAC, 60 Hz to 5VDC 200mA wall
mount transformer or UI 100-240VAC, 50 Hz
to 5 VDC, 2A wall mount transformer
Dimensions: V.35 version - 4.9”L X 2.0”W X 0.9”H
(12.4cmL x 5.1cmW x 2.3cmH);
RS-232 version - 3.5”L x 2.1”W x 0.8”H
(9.0cmL x 5.3cmW x 2.0cmH)
19 20
APPENDIX B
PATTON MODEL 2400 CABLE RECOMMENDATIONS
The following statements apply to the Model 2400 when used as a
short range modem over private twisted pair:
All Patton Electronics Company Short Range Modems (SRMs) 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 83nF/mi or 15.72 pF/ft. .0163Ω/ft.
22 AWG 83nF/mi or 15.72 pF/ft. .0326Ω/ft.
24 AWG 83nF/mi or 15.72 pF/ft. .05165Ω/ft.
26 AWG 83nF/mi or 15.72 pF/ft. .08235Ω/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 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 must be taken seriously.
Certain models are better suited for particular applications and
environments than others.

APPENDIX C
PATTON MODEL 2400
FACTORY REPLACEMENT PARTS AND ACCESSORIES
Patton Model # Description
2400/AM/120 MicroLink (RS-232, DB-25 Male
Connector, 120V Power)
2400/AF/120 MicroLink (RS-232, DB-25 Female
Connector, 120V Power)
2400/CM/120 MicroLink (V.35, M/34 Male Connector,
120V Power)
10-2500...........................DDS Cable, RJ48 - RJ48, 6 foot
0805VDC.........................120V Wall Mount AC Adapter
08055DCUI......................UI 110-250VAC 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
07M2400-A......................User Manual
APPENDIX D
MODEL 2400 INTERFACE PIN ASSIGNMENT
DDS/CLEAR CHANNEL INTERFACE
The DDS/Clear Channel Interface is an RJ-48S modular jack.
Pin # Signal
1 TX+ (Line Transmit Positive)
2 TX- (Line Transmit Negative)
3 NC( No Connection)
4 NC (No Connection)
5 NC (No Connection)
6 NC (No Connection)
7 RX+ (Line Receive Positive)
8 RX- (Line Receive Negative)
PATTON MODEL 2400/C
M/34 CONNECTOR (V.35), TERMINAL INTERFACE
Pin # Signal
B SGND (Signal Ground)
C RTS (Request to Send)
D CTS (Clear to Send)
E DSR (Data Set Ready)
F CD (Carrier Detect)
L LAL (Local Analog Loop)
M TM (Test Mode)
N RDL (Remote Digital Loop)
P TD(Transmit Data)
R RD (Receive Data)
S TD/ (Transmit Data-B)
T RD/ (Receive Data-B)
U XTC (External Transmit Clock)
V RC(Receive Timing)
W XTC/ (External Transmit Clock-B)
X RC/ (Receive Timing-B)
Y TC(Transmit Clock-A)
AA TC/ (Transmit Clock-B)
KK Supplemental Power Input
21 22

APPENDIX D (Continued)
MODEL 2400/A
DB-25 CONNECTOR (RS-232/V.24), TERMINAL INTERFACE
Pin # Signal
1 Frame Ground
2 TD(Transmit Data)
3 RD (Receive Data)
4 RTS (Request to Send)
5 CTS (Clear to Send)
6 DSR (Data Set Ready)
7 SGND (Signal Ground)
8 CD (Carrier Detect)
9 User Selectable: Supplemental Power Input or
Not Used
15 TC(Transmit Clock)
17 RC (Receive Clock)
18 LL (Local Loop)
21 User Selectable: Supplemental Power Input or
RL (Remote Loop)
24 XTC (External Transmit Clock)
25 TM (Test Mode)
Copyright ©
Patton Electronics Company
All Rights Reserved
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