®
Rear Connector Plate and Modular DSU V.35 Adapter
Installation Instructions
Document Number 3000-A2-GZ41-50
July 1999
Overview
This document describes the installation procedure for the rear connector plate
(Feature Number 3000-F1-021) and the modular Data Service Unit (DSU) V.35
adapter.
A rear connector plate is used with a modular DSU or a COMSPHERE 3800
Series modem which has gold contacts on the rear edge of its circuit card
(Figure 1). When the rear connector plate is installed in a COMSPHERE 3000
Series Carrier, you can remove the modular DSU or 3800 Series modem without
disturbing the DTE cables attached to the rear connector plate at the back of the
carrier.
The rear connector plate has two 25-pin DTE connectors. One is a an
EIA-232-D/V.24 connector and the other is an ITU-T V.35 connector. If your cable
requires a 34-pin V.35 interface, you must use the V.35 adapter (Figure 3).
Gold Contacts
25-Pin
Modular DSU
EIA-232-D
Connector
25-Pin
V.35
Connector
Backplane
Connector
Figure 1. A Modular DSU and Rear Connector Plate
3000-A2-GZ41-50
July 1999
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4. Aligning the circuit card with the rear connector plate, slide the DSU into the
slot until the connectors seat firmly into the back of the carrier.
5. Press the faceplate latch to secure the DSU in the carrier, rotate the circuit
pack lock into the closed position, and tighten the screw.
6. Return to the rear of the carrier and tighten the rear connector plate screw.
7. At the rear of the carrier, connect the DTE to the rear connector plate (see
Figure 2):
— If you are using an EIA-232-D interface cable, connect the EIA-232-D
cable to the top DTE connector on the rear connector plate.
— If you are using a V.35 cable with a 34-pin connector, use the V.35
adapter as described in the next procedure.
Connecting to a 34-Pin V.35 Interface
To connect the V.35 adapter:
" Procedure
1. Connect the 25-pin end of the V.35 adapter to the bottom DTE connector on
the rear connector plate. Tighten the screws on both sides of the adapter.
2. Connect the DTE’s V.35 cable to the V.35 adapter. Tighten the screws on
both sides of the cable connector.
3. If a ferrite choke was supplied with your DSU, install it on the V.35 cable as
closely as possible to the adapter. Secure it in position, if necessary, with a
cable tie.
Table 1 lists the pin assignments for the rear connector plate and the V.35
adapter.
25-Pin Connector
Thumbscrews
V.35 Adapter
V.35 Cable
99-16298
Figure 3. V.35 Adapter
3000-A2-GZ41-50
July 1999
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Table 1. Rear Connector and V.35 Adapter Pin Assignments
25-Pin Connector 34-Pin
on Rear
Connector on
Circuit Name
Connector Plate V.35 Adapter
7
4
B
C
Signal Ground
Request-to-Send (RTS)
5
D
Clear-to-Send (CTS)
6
E
Data Set Ready (DSR)
8
20
21
F
H
J
Received Line Signal Detect (RLSD)
Data Terminal Ready (DTR)
Ring Indicator (RI)*
18
L
Local Loopback (LL)
19
N
Remote Digital Loopback (RL)
Transmitted Data (TXD)
Received Data (RXD)
Transmitter Signal Element Timing – DTE Source
Receiver Signal Element Timing – DCE Source
Transmitter Signal Element Timing – DCE Source
Positive dc Test Voltage
24, 11
23, 22
15, 2
16, 3
14, 1
9
P, S
R, T
U, W
V, X
Y, AA
HH
KK
NN
10
25
Negative dc Test Voltage
Test Mode (TM)
* Ring Indicator is available only on a DMB-S or a DBM-V.
Warranty, Sales, Service, and Training Information
Contact your local sales representative, service representative, or distributor
directly for any help needed. For additional information concerning warranty,
sales, service, repair, installation, documentation, training, distributor locations, or
Paradyne worldwide office locations, use one of the following methods:
H
(Be sure to register your warranty there. Select Technical Support →
Warranty Registration.)
H
Telephone: Call our automated system to receive current information by fax
or to speak with a company representative.
— Within the U.S.A., call 1-800-870-2221
— Outside the U.S.A., call 1-727-530-2340
Document Feedback
We welcome your comments and suggestions about this document. Please mail
them to Technical Publications, Paradyne Corporation, 8545 126th Ave. N.,
number and title of this document in your correspondence. Please include your
name and phone number if you are willing to provide additional clarification.
*3000-A2-GZ41-50*
*3000–A2–GZ41–50*
Copyright E 1999 Paradyne Corporation
July 1999
3000-A2-GZ41-50
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