Installation Guide

Installing the Data Module, Hardware Key, and Remote Maintenance Line
Chapter 3
Installing the Data Module 3-3
To install a 7400B/7400B Plus Data Module, you need the following:
• One 7400B/7400B Plus Data Module
• One EIA-232-D cable
• One D8W cord
• One 7400B/7400B Plus Data Module Power supply
• If the communications port on your PC has nine pins, you also need an M25/F9
Adapter.
Selecting an EIA-232-D Cable 3
Select an EIA-232-D cable with a male connector at one end to connect with the
Port 1 connector of the 7400B/7400B Plus, and a connector of the appropriate
gender at the other end to connect to the communications port of your PC.
Cables with an earlier RS-232-C designation will also work.
Setting the 7400B/7400B Plus Data Module Configuration 3
Before connecting the data module, set its configuration. To do this, complete the
following steps:
Caution
Disconnect all cables and telephone cords from the rear of the unit. If
you do not disconnect all cables and cords at this point, you could cause
permanent damage to the 7400/7400B Plus.