USER
MANUAL
MODEL IM2RC/F
64k Co-Directional Rack Mount
Modem Rear Card
Part# 07MIM2RC/F-A
Doc# 078411UA
Revised 5/4/98
SALES OFFICE
(301) 975-1000
TECHNICAL SUPPORT
(301) 975-1007
An ISO-9001
Certified Company
2.0 GENERAL INFORMATION
1.2 CE NOTICE
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 this product, please contact Patton Electronics
Technical Support at: (301) 975-1007.
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 Technical
Support.
1.3 SERVICE
2.1 FEATURES
• Designed for use with Patton Electronics short range modem
access products that receive Patton’s Rear Card modules and
support 64k/128k synchronous data rates
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 Services at:
• Compliant with ITU-T G.703 electrical specifications
• 120 ohm RJ-45 Network Termination
• Complies with ITU-T G.823 Jitter Control Specifications
• Supports Clear Channel or Octet Timing Modes
• Built-in Transformer Isolation and Surge Protection
• Supports Network or Modem Timing
Telephone: (301) 975-1007;
email: [email protected].
NOTE: Packages received without an RMA number will not be
accepted.
• Fits in Patton’s 2u (3.5”) rack chassis and cluster boxes
• Made in the U.S.A.
Patton Electronics' technical staff is also available to answer any
questions that might arise concerning the installation or use of your
Model IM2RC/F. Technical Service hours: 8AM to 5PM EST, Monday
through Friday.
2.2 DESCRIPTION
The Patton Model IM2RC/F is a rack-mountable rear card that
provides Patton baseband modems with an interface to the G.703
PCM network. With the IM2RC/F you can achieve high speed G.703
network extension, dedicated high speed internet access, remote LAN
access,...the possibilites are endless! Supporting 64 kbps clear
channel or 128 kbps octet mode data streams, the IM2RC/F can set its
own clock or it take clocking from the G.703 network.
The Model IM2RC/F meets baseband modem function cards such
as 1092ARC, 1045RC and 2500RC in the mid-plane of Patton’s 2U
(3.5”) rack chassis. G.703 access is accomplished via a 120 Ohm RJ-
45 jack. 2 or 4 Wire twisted pair Line connections are made via a
second RJ-45 jack.
The Model IM2RC/F features on-board transformer isolation and
surge protection as well as compliance with ITU-T G.823 Jitter Control
Specifications.
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3.0 CONFIGURATION
SWITCH SUMMARY TABLE
This section describes how to configure the IM2RC/F rear card.
Please refer to the appropriate function card user manual to configure
the function card.
Position
S1
Function
Factory Default
Reserved for Future Use
Operation Mode
Off
S2
Off Clear Channel
WARNING! The IM2RC/F card contains sensitive
integrated circuitry. Failure to ground yourself during
configuration may result in damage to the IM2RC/F card or
the front function card.
S3
Timing Mode
Off Network Timing
S4
Reserved for Future Use
Reserved for Future Use
G.703 Transmit Octet
Reserved for Future Use
Reserved for Future Use
Off
S5
Off
3.1 CONFIGURING THE IM2RC/F HARDWARE SWITCHES
S6
Off Injected BPVs
S7
Off
Off
The Model IM2RC/F rear card features an eight position DIP switch
mounted on the rear of the printed circuit board. Use these switches to
configure G.703 operational and timing modes. Figure 1, below shows
the position of the DIP switches on the board.
S8
Notice! The RJ-45 G.703 port of the Model IM2RC/F is
intended to connect to telecommunication network voltage
(TNV) circuits which may carry dangerous voltages. Therefore
the power and network cables must be disconnected prior to
switch configuration.
Switch S1: Reserved for Future Use
Switch S1 is reserved for future use and should remain in the Off
position.
Switch S2: Operation Mode
ON
Use Switch S2 to set the IM2RC/F for either Clear Channel or
Octet Timing Mode. Most installations use Clear Channel (64kbps)
Mode operation, though some installations may use Octet Timing
Mode.
DIP Switches
OFF
Figure 1. Model IM2RC/F Card Showing DIP Switches
When operating in octet timing mode, the IM2RC/F facilitates a
sense of frame synchronization by inserting bi-polar violations in the
AMI conding structure. When the IM2RC/F is set to Octet Timing Mode
(On position), all communications equipment in the channel must be
configured to communicate at 128 kbps (64 kbps data plus 64 kbps
octet framing pattern) Additionally, all terminal equipment must support
octet timing. When set to Clear Channel Mode, the system operates at
64 kbps.
Figure 2 shows the orientation of the DIP switches with respect to
the “ON” and “OFF” positions.
ON
OFF
S2
Off
On
Setting
Clear Channel Mode
Octet Timing Mode
Figure 2. Close up of Configuration switches
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6
Switches S3 Timing Mode
3.2 CONNECTING THE INTERFACE DRIVER BOARD
This package contains an interface driver board that allows you to
configure your front function card for G.703 operation. Figure 3 shows
the Interface Driver Board connected to a Model 1092ARC front
function card (You may also use this product with other Patton rack
cards, such as Model 2500RC, 1045RC or 1092RC).
The setting of Switch S3 determines the source of the system timing.
The system timing may be provided by:
1. The G.703 network;
2. The local function card or remote baseband
modem/CSU/DSU (either a rackable function card or stand-
alone unit).
Model
1092ARC
Interface Driver Board
Set Switch S3 to “Network” timing when only one of the two
connected baseband modems or CSU/DSUs employ a 64k/G.703
interface card (the “other” baseband modem connects to a V.35, EIA-
232, etc device).
FRONT
Set Switch S3 to “Modem” timing when both of the connected
baseband modems or CSU/DSUs employ a 64k/G.703 interface card.
In this application, one G.703 interface card must be set to “Modem”
timing, and the other must be set to “Network” Timing. (Please refer to
the baseband modem or CSU/DSU user manual for additional
configuration details).
Switches S4 and S5: Reserved for Future Use
Figure 3 Model IM2RC/F Driver Board mounted on Model 1092ARC
Switches S4 and S5 are reserved for future use and should remain
in the Off position.
Follow the instructions below to connect the interface driver board
to the front function card:
Switch S6: Operation Mode
1. With the function card (such as 1092ARC, shown above)
pulled out of the rack or clusterbox chassis, locate the driver
board to be replaced on the top of the base unit front card.
In some cases it is necessary to include bi-polar violations in the
AMI structure when operating in Clear Channel (64 kbps) mode. This
necessity is determined by communications or terminal equipment
external to the the IM2RC/F. Use Switch S6 to configure the unit to
transmit G.703 data to the network with or without BPVs.
2. Lift the old interface board gently off of the PC board.
3. Position the IM2RC/F driver board on top of the function card’s
pc board with the sockets oriented toward the male pins.
S6
On
Off
Setting
No BPVs
Injected BPVs
Please be sure the label marked FRONT
is pointed
toward the front of the function card (toward the LEDs).
4. Push the Interface Driver Board gently onto the socket and re-
install the function card into the rack or cluster system.
Switches S7 and S8: Reserved for Future Use
Switch S7 and S8 are reserved for future use and should remain in
the Off position.
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4.0 INSTALLATION
NOTE: Please refer to the Model 1000RP Series User Manual AC
and DC Rack Mount Power Supplies for fuse and power card
replacement information.
This section describes the functions of the Model 1000R16 rack
chassis, tells how to install the rear-mounted Model IM2RC/F card into
the chassis, and how to connect to the G.703 PCM network, and to the
twisted pair line interface. Please refer to the appropriate function card
user manual for further details.
4.2 INSTALLING THE REAR IM2RC/F CARD AND FRONT
FUNCTION CARD
The Model IM2RC/F is a rear-mountable G.703 interface card that
works with Patton function card access products that support 64k/128k
synchronous data rates. 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 IM2RC/F and its function card mate into the rack chassis:
4.1 THE MODEL 1000R16 RACK CHASSIS
The Model 1000R16 Rack Chassis (Figure 4, below) has sixteen
baseband modem card slots, plus its own power supply. Measuring
only 3.5” high, the Model 1000R16 is designed to occupy only 2U in a
19” rack. Sturdy front handles allow the Model 1000R16 to be
extracted and transported conveniently.
WARNING! The IM2RC/F card contains sensitive
integrated circuitry. Failure to ground yourself during
installation may result in damage to the IM2RC/F card or
the front function card.
1. Slide the IM2RC/F rear card into the back of the chassis along
the metal rails provided.
2. Secure the IM2RC/F rear card using the metal screws
provided.
3. Slide the front function card into the front of the chassis. It
should meet the IM2RC/F rear card when it is almost all the
way into the chassis.
Figure 4: Model 1000R16 Rack Chassis with power supply
4. Push the front card gently into the card-edge receptacle of the
4.1.1 The Rack Power Supply
rear card. It should “click” into place.
The power supply included in the Model 1000R16 rack uses the
same mid-plane architecture as the function cards. The front function
card and the power supply slide in from the front, while the rear card
and power entry modules slide 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.
5. Secure the front card using the thumb screws.
WARNING! There are no user-serviceable parts in the
power supply section. Voltage setting changes and fuse
replacement should only be performed by qualified
service personnel. Contact Patton Electronics Technical
support at (301)975-1007 for more information.
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4.3 MAKING INTERFACE CONNECTIONS
4.3.2 CONNECTING THE LINE INTERFACE
The Model IM2RC/F is designed to provide access to a 64 kbps
co-directional G.703 PCM network. Figure 5 shows the position of the
G.703 interface and the line interface of the IM2RC/F. This section
describes how to connect the G.703 interface and the line interface.
The Model IM2RC/F is to be used with Patton function card access
products (i.e. 1045RC, 1092RC, 1092ARC, 2500RC) that support
64k/128k synchronous data rates. There are two essential
requirements for connecting the line interface on Model IM2RC/F:
Notice! The G.703 line surge protection on this unit was
installed for circuit protection only. By no means does this
include the preservation of signal quality during a large surge.
1. These units work in pairs. Both units at the end of the twisted
pair must have the proper 2-Wire/4-Wire setting. For
instance, if you are operating in 2-Wire mode, both units must
be in the 2-Wire setting. Similarly, if you are operating in 4-
Wire mode, both units must be in the 4-Wire setting. NOTE:
Currently only the 1092 and 1092A families support 2-Wire
Mode.
RJ-45 Line Interface
2. To function properly, the Model IM2RC/F needs one or two
twisted pairs of metallic wire. The twisted pairs must be
unconditioned, dry, metallic wire, between 19 (.9mm) and 26
AWG (.4mm) (Appendix B describes cable requirements) .
Standard dial-up telephone circuits, or leased circuits that run
through signal equalization equipment, or standard, flat
modular telephone type cable, are not acceptable. Figure 7,
below, shows the pin/signal relationships of the Line Interface
Port.
120 Ohm RJ-45
G.703 Interface
Figure 5: Model IM2RC/F Interface Ports
1 (4-Wire RX+)
2 (4-Wire RX-)
3 (no connection)
4 (2-Wire TIP)/(4-Wire TX+)
5 (2-Wire RING)/(4-Wire TX-)
6 (no connection)
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4.3.1 CONNECTING TO A G.703 PCM NETWORK CHANNEL
2
3
4
5
6
7
8
The 120 Ohm RJ-45 port on a Model IM2RC/F is pre-wired for
direct connection to the G.703 PCM network. Connect the RJ-45 jack
provided by your digital service carrier to the 120 Ohm G.703 interface
on the Model IM2RC/F using a straight through twisted pair cable
between 19 and 26 AWG (0.4mm to .9mm, inversely). To be sure you
have the right wiring, refer to Figure 6, below.
7 (no connection)
8 (no connection)
Figure 7: RJ-45 Line Interface
1 (RX+)
2 (RX-)
3 (N/C)
1
2
3
4
5
6
7
8
4 (TX-)
5 (TX+)
6 (N/C)
7 (N/C)
8 (N/C)
Figure 6: 120 Ohm RJ-45 G.703 Interface
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5.0 OPERATION
4.3.3 Two-Wire and Four-Wire Cable Connection Via RJ-45
Once the Model IM2RC/F is installed and configured, it should
operate transparently. This sections describes a typical application
and general operating instructions.
1. The Line Interface Port on the Model IM2RC/F’s twisted pair
interface is polarity insensitive and is wired for a two-wire
interface.
5.1 TYPICAL APPLICATION
2. Proper 2-Wire Pairing between the two modems is as follows:
The Model IM2RC/F allows a remotely connected LAN or high
speed application to connect to the 64k/G.703 (PCM) network through
a pair of Patton baseband modems. Figure 8 (below) shows a typical
application of the IM2RC/F.
SIGNAL PIN#
PIN#
SIGNAL
TIP
4--------------------------------------------- 4
5--------------------------------------------- 5
TIP
RING
RING
Remote Baseband
Modem, CSU/DSU, HDSL
Modem, etc.
3. Proper 4-Wire Pairing between the two modems is as follows:
G.703
SIGNAL PIN#
PIN#
SIGNAL
PCM
Network
LAN
Router
Tx
Tx
4--------------------------------------------- 3
5--------------------------------------------- 6
Rx
Rx
Rack-Mounted
Baseband Modem, CSU/DSU,
HDSL Modem, etc. with
IM2RC Rear Card
Rx
Rx
3--------------------------------------------- 4
6--------------------------------------------- 5
Tx
Tx
Figure 8: IM2RC/F Typical Application
NOTE: The pin designations shown above are to be used when
connecting to another IM2RC/F or other similarly pinned line
interface on a Patton rear card. Please review the appropriate
function card user manual or stand-alone product user manual to
determine the correct pin assignments.
5.2 OPERATING INSTRUCTIONS
In order to operate, the Model IM2RC/F must be installed in the
rear of a Patton 16 port rack or a 2, 4, or 8 port ClusterBox™ chassis.
A front function card, such as a baseband modem, CSU/DSU, or HDSL
modem meets the IM2RC/F rear card in the mid-plane of the chassis.
The IM2RC/F also requires a G.703 connection to the 64 kbps co-
directional PCM network and a line connection to a remote Patton
transmssion device. After applying power, the function card and
IM2RC/F operate transparently according to the applied settings
(Please refer to the function card manual for further details).
Notice! Any G.703 or line interface cable connected to the
Model IM2RC/F 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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APPENDIX B
APPENDIX A
PATTON IM2RC/F
CABLE RECOMMENDATIONS
PATTON IM2RC/F
SPECIFICATIONS
All Patton Electronics Company Baseband Modems, CSU/DSUs
and Short Range Modem are tested to the distances published in our
Catalogs and Specification Sheets on twisted-pair cable with the
following characteristics:
Applications:
64kbps G.703 PCM network
extension
Symmetrically balanced 4-wire, 120 Ohm
RJ-45 jack termination
Entire module plugs into 1092RC,
1092ARC, 2500RC, 1045RC, HDSL Series
Patton transmission devices products
Supports octet or clear channel mode; co-
directional timing, Rx recovered: 64/128
kbps±500/1000ppm.
Octet timing auto detection on receiver.
AMI with bi-polar violations for octet timing.
Modem or network timing
G.703 Interfaces:
Line Interface:
Wire Gauge
Capacitance
Resistance
19 AWG
22 AWG
24 AWG
26 AWG
83nF/mi or 15.72 pF/ft.
83nF/mi or 15.72 pF/ft.
83nF/mi or 15.72 pF/ft.
83nF/mi or 15.72 pF/ft.
.0163W/ft.
.0326W/ft.
.05165W/ft.
.08235W/ft.
Operating Modes:
Line Encoding:
Timing Modes:
G.703 Input
We fully expect that the Baseband Modems, CSU/DSUs and 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).
Signal Level:
0 to -10 dB
2.0V differential into 100 Ohms, nominal
120 Ohms
Transmit Level:
Load Impedance:
Jitter Performance:
Surge Protection:
Isolation:
PCB Dimensions:
Approvals:
Compliance:
CTR 14, G.823
Wire with capacitance of 20pF/ft. or less is suitable for all Baseband
Modems, CSU/DSUs and 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#).
Complies with IEC 801.5 level 1, 500V
1500V RMS isolation, tranformer coupled
2.04” x 3.24”
CE Mark
EMC directive: 89/336/ECC
Emissions: EN55022
Immunity: EN50082-1
Low Voltage (LVD) Directive: 73/23/ECC
Safety: EN60950
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.
CTR 14, (Type Approval) - The
symbol indicates that the Model IM2RC/F is
in compliance with the applicable Telecom
Directive of the EU. If your IM2RC/F is
marked with this symbol, it is EU Telecom
Type Approved and may be connected to
the public network.
Selection of the proper Baseband Modem, CSU/DSU or 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.
Power
Consumption:
<140mA @ 10 VAC RMS, including
integrated front card modem with the rack
card power supply under full load
0 - 60˚ C (32 - 140˚ F)
Temp. Range:
Altitude Range:
Humidty Range:
Up to 15,000 ft (4572 m)
5 - 95% non-condensing
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APPENDIX D
APPENDIX C
PATTON IM2RC/F
FACTORY REPLACEMENT PARTS
AND ACCESSORIES
PATTON IM2RC/F
120 OHM G.703 INTERFACE PIN ASSIGNMENT
(RJ45 Female Connector)
Pin Number
Signal
Patton Model #
Description
1.................................... ......RX+
2 ..........................................RX-
3 ..........................................no connection
4...........................................TX-
1000RCM12592.........Rear card w/DB25F & RJ45 (V.24 interface)
1000RCM12492.........Rear card w/ M/34F & RJ45 (V.35 interface)
5 ..........................................TX+
1000RPEM ................120/240V Rear Power Entry Module
1000RPSM-2 .............120/240V Front Power Supply Module
1000RPEM-DC..........DC Rear Power Entry Module
1000RPSM-48A.........48V Front Power Supply Module
1000RPEM-V.............120/240V CE Compliant Rear Power
Entry Module
6 ..........................................no connection
7 ..........................................no connection
8 ..........................................no connection
1000RPEM-V.............120/240V CE Compliant Rear Power
Supply Entry Module
1000CC......................Control Card
1000RCM703/64DB...Interface daughter card, G.703
1180RCDB.................Interface daughter card, V24/V.35
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
IM2RC/F ....................G.703 Rear Card
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APPENDIX E
APPENDIX F
LINE INTERFACE PIN ASSIGNMENT
(RJ45 Female Connector)
PATTON IM2RC/F
ARCHITECTURE
Pin Number
Signal
1.................................... ......4-Wire RX+
2 ..........................................4-Wire RX-
3 ..........................................no connection
4...........................................2-Wire TIP/4-Wire TX+
5 ..........................................2-Wire RING/4-Wire TX-
6 ..........................................no connection
7 ..........................................no connection
8 ..........................................no connection
Copyright 1998
Patton Electronics Company
All Rights Reserved
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