Справочник Пользователя для AT&T System 85

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The basic features of the 7400A data module are:

d

DCP mode 2 operation only

d

Full-duplex, 10-bit start/stop, asynchronous operation

d

Asynchronous data rates of 0.3, 1.2, 2.4, 4.8, 9.6, and 19.2 kbps

d

Even, odd mark, and space parity options

d

Automatic answer option

d

Signal loss disconnect option

d

Autobaud

d

Autoparity

d

Long-break and triple-break disconnect options

Data features for modem pooling applications include:

d

EIA RS-232-D DTE interface, enchanced with CI2 and CH2 leads

d

Interface for D-lead control modems

d

Interface for Hayes-compatible modems

Data features for host or terminal applications include:

d

EIA RS-232-D DCE interface

d

Keyboard dialing and Hayes user interface emulation option

d

Answer only

d

Cyclic Ring-indicator option

d

Ignore DTR input option

The stand-alone 7400A Data Module operates with power from a WP90110 L7 AC power con-
verter.  This is a modular AC to DC adapter that is normally plugged into a wall outlet.  The Z77A
Data Mounting has a built-in power supply for powering data modules in the multiple-mount
arrangement.