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The ISDN Asynchronous Data Module (ADM)

Issue 11 December 1999

21-35

The ISDN Asynchronous

Data Module (ADM)

The ISDN ADM is used in conjunction with an ISDN 7505, 7506, or 7507 voice

terminal to provide integrated voice/data. With the ADM, an attached data

terminal or personal computer can send and receive data through the switch. This

unit mounts in the base of the voice terminal and is used instead of the Voice Only

Module (VOM). The VOM cannot be upgraded to an Asynchronous Data Module.

Physical Description

The following are physical characteristics of the ISDN ADM.

■ The ISDN ADM is a printed circuit board built into the ISDN 7505, 7506,

and 7507 Voice Terminal.

■ Data and EIA RS-232-D connections — An EIA RS-232-D and an 8-pin

modular jack are located on the back of the ADM.

Features

The ISDN ADM offers the following features:

■ Speed — Data rates of 0.3, 1.2, 2.4, 4.8, 9.6, and 19.2 kbps

■ Full-duplex

■ Asynchronous

■ DATA/SEND/OFF button with two indicator lights; allows alternative data

call setup from dial pad

■ Data call setup from an ASCII keyboard through an EIA RS-232-D

interface

■ Ability to change options without dropping the data call

■ Automatic or manual answering of incoming calls

■ Remote and local loopback test

■ Local mode operation for option setting and call control via terminal

keyboard

■ Hayes AT interface support

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