Installation Guide

Installing the Data Module, Hardware Key, and Remote Maintenance Line
3-2 Installing the Data Module
Installing the Data Module 3
A digital line is required to connect either the 7400B/7400B Plus (4-wire digital port
only) or 8400B Plus (2-wire digital port only) data module to the DEFINITY
system.
Refer to “Administering” on page 2-5 for data module translations.
When you first apply power to the 7400B/7400B Plus data module, the progress of
the self-test is indicated by the sequential, left-to-right lighting of the ten front panel
LEDs. If the self test finds no problems, the LEDs labeled “Power/Test” and “TR”
remain on and all others go out. The operation of the LEDs described here assumes
that the factory default options are still in effect.
When you first apply power to the 8400B, the green and red LED remain on while
the 8400B performs a self-test. When the test is complete, the green LED goes off.
If the self-test passes, the red LED remains on. If the self-test fails, the red LED
flashes three times, and then remains on. This indicates a defective data module.
Installing the 7400B/7400B Plus Data Module with a
Telephone
3
The 7400B Plus comes with the default option set to be used with a voice terminal.
Refer to 7400B/7400B Plus Data Module User Guide.
Installing a 7400B/7400B Plus Data Module without a
Telephone
3
This section describes the equipment you need to install a 7400B/7400B Plus Data
Module and the steps you should follow to prepare it for operation.
Note
The hardware key is connected to a parallel port on the Server PC.