Applications; Physical Description - AT&T Callmaster Series Reference Manual

The D401A and D401B Digital Display Modules add a large easy-to-read 40-character display to
the top of the 7405D or 7434D voice terminal. The D401 provides a vacuum-fluorescent display,
which is significantly brighter than LCD displays and visible from any angle. It provides prompt
retrieval of Leave Word Calling or Message Center messages, can identify incoming calls, both
names and number, and perform other functions.

Applications

The Digital Display Module can be used with a DEFINITY G1, G2, G3, System 75, and
System 85. It is used with the 7405D and 7434D voice terminals. It is particularly useful for
receptionists and executives.

Physical Description

Automatic Displays
The D401A/B Digital Display Module automatically provides a visual display of the following call-
related information:
Calling and called party identification
Calling and called number
Call coverage status
Auxiliary Displays
In its various auxiliary modes, the Digital Display Module also provides other services:
Time and date display
Elapsed time on calls
Message retrieval
Display of stored abbreviated dialing numbers
Access to Integrated Directory (except on System 85 or DEFINITY G2)
Digital Display Module
Call Coverage Modules
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