7500B Data Module

Asynchronous DCE Features

EIA RS-232D interface

Circuit switched data communications. Data options can be changed and data calls can be setup via commands from the EIA-432D interface

Ability to change options without dropping a data call

Automatic or manual answering of incoming data calls

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

Asynchronous full-duplex operation

RS-366 Automatic Calling Unit (ACU) interface (requires Multiple Enhancement Board) Hayes AT interface support.

Synchronous DCE Features

The synchronous DCE features with the Multipurpose Enhancement Board are as follows: EIA RS-232D interface

Circuit switched or nailed-up data communication

Data rates of 1.2, 2.4, 4.8, 9.6, 19.2, 56, and 64 kbps Full-duplex operation at all speeds Synchronous half-duplex emulation at 1.2 to 56 kbps

Automatic answering of incoming data calls

RS-366 Automatic Calling Unit (ACU) interface

Autodial

The synchronous DCE features with the High Speed Synchronous Enhancement Board are as follows:

V.35 interface

Circuit switched or nailed-up data communication

Data rates of 48, 56, and 64 kbps

Full-duplex operation at all speeds

Synchronous half-duplex emulation at 56 kbps only

Automatic answering of incoming data calls

Autodial

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AT&T System 85 manual Asynchronous DCE Features, Synchronous DCE Features