Screen Reference
Trunk Group
Administrator’s Guide for Avaya Communication Manager
1267
November 2003
Disconnect Supervision-Out
This field indicates whether Communication Manager receives disconnect supervision for outgoing calls
over this trunk group. It appears when the Direction field is either outgoing or two-way. (If the Direction
field is incoming, Communication Manager internally sets this field to n.)
The entry in this field is crucial if you allow trunk-to-trunk transfers. (To allow trunk-to-trunk transfers
involving trunks in this group, this field must be y and the
Trunk-to-Trunk Transfer
field on the
Feature-Related System Parameters screen must be y). If a user connects 2 trunks through conference or
transfer, and neither far-end server/switch on the resulting connection provides disconnect supervision,
the trunks involved won’t be released because Communication Manager can’t detect the end of the call.
Communication Manager will not allow trunk-to-trunk transfers unless it believes that at least one party
on the call can provide disconnect supervision. Therefore, setting this field incorrectly may cause trunks
to become unusable until the problem is detected and the trunks are reset.
Also, remember that Avaya Communication Manager must receive answer supervision on outgoing
analog CO, FX, WATS, Tie, Tandem, and Access trunks before it will recognize a disconnect signal. If
this trunk group does not receive answer supervision from the far-end server/switch, and you enter y in
this field, Avaya Communication Manager will internally set the field to n.
CAUTION:
Do not set this field to y unless you are certain that the far-end server/switch will provide
answer supervision and disconnect supervision. Most public networks do not provide
disconnect supervision over analog trunks. Check with your network services provider.
Valid entries
Usage
y
Enter y to allow trunk-to-trunk transfers involving trunks in this
group.
Enter y if the far-end sends a release signal when the called party
releases a call an outgoing call, and you want to make the far-end
responsible for releasing the trunk.
The Answer Supervision Timeout field must be 0 and the Receive
Answer Supervision field must be y for the switch to recognize a y
entry.
Enter y to enhance Network Call Redirection.
n
Enter n if the far-end server/switch doesn’t provide a release signal,
if your hardware can’t recognize a release signal, or if you prefer to
use timers for disconnect supervision on outgoing calls. Entering n
prevents trunk-to-trunk transfers involving trunks in this group.