AT&T System 25 manual Data Dial Code DDC, Personal Dial Code PDC, Display Unit, Queue Status

Models: System 25

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Data Dial Code (DDC)

When your System 25 was installed, Data Dial Codes (DDCs) were assigned to data terminals. If you have a data terminal associated with your System 25, you will receive separate information regarding its use.

Personal Dial Code (PDC)

Personal Dial Codes (PDCs) were assigned to telephones. In most cases, your PDC is your extension number. If a telephone is shared by two or more people, each person may have been assigned their own “floating” extension number (FPDC). Floating extension numbers (FPDCs) are also used as a convenience for visitors, and for people who are not permanently assigned to a specific location.

Display Unit

The console’s built-in display provides visual information about incoming and outgoing calls. Use the procedures and sample screens shown at the end of each feature entry. Also, refer to the entries for “Directory”, “Display”, “Inspect”, and “Display Functions”.

Queue Status

System 25 “stacks” calls to a busy console in a waiting line (a queue). These queued calls are then sent to the console, one at a time, as the attendant becomes available. The number of calls waiting in the queue is shown on the right side of the Screen 1 display. If one to nine calls are waiting for to be answered, the actual number appears. A queue of ten or more calls is indicated by "!".

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AT&T System 25 manual Data Dial Code DDC, Personal Dial Code PDC, Display Unit, Queue Status