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Issue 2 November 1996 1-1
1
Introduction
This chapter discusses the basic operating features of the 8400B Plus Data
Module and describes the external indicators and connectors.
The 8400B Plus Data Module is a new version of the 7400B Plus Data Module
and has been designed explicitly to work with two-wire DEFINITY Digital
Communications Protocol circuits. It is fully compatible with the 7400B Plus and
supports all of its functionality and applications.
Overview
Congratulations on the addition of the Lucent Technologies 8400B Plus Data
Module. Following our tradition of excellent quality and high reliability, we have
designed this new 8400B Plus Data Module with the latest advances in
telecommunications technology.
The 8400B Plus Data Module is a full-duplex asynchronous data module. It
provides integrated voice-data communications at the desktop over standard
twisted-pair wiring. At the desk, the 8400B Plus Data Module provides
asynchronous communication speeds ranging from 300 bps to 19.2 Kbps. The
8400B Plus Data Module’s ability to emulate a Hayes® compatible modem
interface makes it compatible with many standard PC communications
packages that use Hayes command sets. In addition, the 8400B Plus Data
Module provides a voice dial capability that allows you to initiate voice calls from