Direct Inward Station Dialing - Comdial DSU and DSU II System Reference Manual

Programming The Attendant Features

2.3 Direct Inward Station Dialing

The direct inward station dialing (DISD) feature allows an external
party to call an intercom station directly without assistance from the
attendant (over a line programmed for DISD). As the system attendant,
you may instruct callers to make DISD calls when necessary.
You may give the caller a DISD line number and the extension number
associated with the station he or she is trying to reach. Future calls
from the caller to a specific party will not have to be serviced at the
attendant's station, although a ring-no answer or busy condition at the
called party's station will result in the system's handling the call in
another manner (described below).
When a caller makes a DISD call from an outside line, he or she will
initially hear ringing. The system will answer the call with a DISD
continuous dial tone; the caller can then dial an extension number.
•
If called station is idle, a tone is sounded and called station rings.
•
If the call is answered by another station user, the caller can ask for
transfer to desired station.
•
If ringing stops and dial tone sounds again, the caller can dial another
extension number.
•
If called station has call forward feature set, forward station rings.
•
If called station is busy, call is placed on hold and camped-on at busy
station. If camp-on is not answered within a transfer recall timeout
period, busy tone is given, followed by a DISD dial tone.
2–6 LCD Speakerphone Reference Manual
GCA70–245