AT&T System 85 manual Physical Description

8400B Plus Data Module

8400B Plus Data Module

(Rear Endplate)

	M9/F25 Adapter
	(use only with 25-pin
LINE/ USE ONLY WITH COMMUNICATION	EIA-232-D Connector Cord)
PHONE ! POWER CIRCUIT POWER SOURCE

Telephone

(Optional) D8W

EIA-232-D

D8W (9-pin or 25-pin)

Connector

Cord

Wall

Jack

FIGURE 5-4. Typical Installation of the U.S. and International Configuration,

including Telephone and Closet Power Supply

Physical Description

Dimensions

Note: The following measurements for the 8400B Plus data module are approximate.

Width = 5 inches

Depth (front and rear) = 7 3/4 inches

Height = 1 1/4 inches

Lights

The front panel of the 8400B Plus has two lights, one red light and one green light. These lights indicate the status of the set during normal operation and the result of self-tests when initially powered.

When power is first applied to the 8400B Plus data module, the unit performs a self-test to verify that it is in working order. During the self-test, both lights will remain ON. When the self-test is complete, the green light turns OFF.

If self-test passed, the red light will remain ON. This indicates that your 8400B Plus data module is installed and ready for data communications operation.

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