User's Guide

8400B Plus Data Module User’s Guide 555-020-709
Issue 2
November 1996
Introduction
1-3
Physical Description
In addition, the 8400B Plus Data Module can be used to automatically turn on
the speakerphone of the voice terminal when a voice call is dialed from your
terminal device.
Additional features of the 8400B Plus Data Module include the following:
■ nonvolatile, read-write memory for storing installation options, two data
options profiles, and up to four telephone numbers
■ an AT command interface that emulates a Hayes 2400 Smartmodem™
and supports the following:
— storage of the wait time for carrier detect interval (S-register S7)
— voice call origination using the ATDP command
■ automatic speed and parity adjustment
■ even, odd, mark, space or no parity
■ automatic data throughput adjustment
■ power-up self-test
■ local and remote loopback tests with test duration timers
■ voice terminal powered by the PBX is not affected if AC power is
removed from the 8400B Plus Data Module
Physical Description
The 8400B Plus Data Module is housed in a black casing, approximately
5" x 7.75" x 1.5". Its name appears on the underside of the unit. The external
features of the front and rear panels and the separate power supply units are
described in this section.
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