Paradyne 3511 DSU User Manual

®

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

Modular DSU

Backplane
Connector

25-Pin
EIA-232-D
Connector

25-Pin
V.35
Connector

3000-A2-GZ41-50

Figure 1. A Modular DSU and Rear Connector Plate

July 1999

1

Installing the Rear Connector Plate

Prior to installation, check the rear connector plate and V.35 adapter for damage.
If either is damaged, report this immediately to your shipper and your service
representative.

!

HANDLING PRECAUTIONS FOR
STATIC-SENSITIVE DEVICES

This product is designed to protect sensitive components from
damage due to electrostatic discharge (ESD) during normal operation.
When performing installation procedures, however, take proper static
control precautions to prevent damage to equipment. If you are not

496-15104

 Procedure

sure of the proper static control precautions, contact your nearest
sales or service representative.

To install a DSU and its rear connector plate for the first time:

1. At the rear of the carrier, set the tab on the rear connector plate into one of
the slots on the carrier’s backplane (Figure 2). Make sure the rear connector
plate uses the same slot position intended for the DSU.

2. Loosely fasten the screw attached to the rear connector plate, allowing for
slight adjustment that may be needed when installing the DSU.

3. At the front of the carrier, hold the DSU vertically with the latch on its
faceplate in the open position. Then, insert the circuit card into the top and
bottom circuit card guides for the slot that contains the rear connector plate.

Non-Modular Devices Model 3511 DSU Rear Connector Plates

Screw

25-Pin
EIA-232-D
Connectors

25-Pin V.35
Connectors

Slot

2

Figure 2. Rear View of the COMSPHERE 3000 Series Carrier

July 1999

3000-A2-GZ41-50