AT&T System 85 manual NEXT/NO, BACK, and ENTER/YES buttons, Jacks, Mounting Options, Tests

7400A Data Module

NEXT/NO, BACK, and ENTER/YES buttons

These buttons are used to view and set data communication options and functions, adjust the contrast of the display, and to conduct tests.

Jacks

The 7400A data module is equipped with the following jacks.

PORT 1 (EIA RS-232-C or -D)

PHONE (not used)

LINE (to switch) (RJ-45)

POWER

Mounting Options

The 7400A data module can be configured as a stand-alone unit or in a multiple-mount housing. (The multiple-mount housing must be used if D-lead modems are used in the modem pool. The multiple-mount can also be used to support Hayes-compatible modems.)

Color Options

The 7400A data module is available in misty cream only.

Tests

The 7400A data module supports the following test and maintenance features:

Self-test

Local loopback and remote loopback

Local Loop self test and remote loop self test

DCP looparound

Maintenance activate

Make busy

Manual on-hook/off-hook

5-6