Avaya Communication Manager Administrator's Manual page 1266

Screen Reference
Trunk Group
Direction
Enter the direction of the traffic on this trunk group. The entry in this field affects which timers appear on
the Administrable Timers page. This field appears for all trunk groups except DID and CPE.
Valid entries
incoming
outgoing
two-way
Disconnect Supervision-In
This field indicates whether Avaya Communication Manager receives disconnect supervision for
incoming calls over this trunk group. It appears when the
Direction field is outgoing, 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
Feature-Related System Parameters screen must be y).
If a user connects 2 trunks through conference or transfer, and neither far-end media server or switch on
the resulting connection provides disconnect supervision, the trunks involved will not be released
because Avaya Communication Manager cannot 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.
Valid entries
y
n
CAUTION:
In general, U.S. central offices provide disconnect supervision for incoming calls but not
for outgoing calls. Public networks in most other countries do not provide disconnect
supervision for incoming or outgoing calls. Check with your network services provider.
1266
Usage
Enter two-way for Network Call Redirection.
Usage
Enter y to allow trunk-to-trunk transfers involving trunks in this
group.
Enter y if the far-end server/switch sends a release signal when the
calling party releases an incoming call, and you want to make the
far-end server/switch responsible for releasing the trunk.
Enter y to enhance Network Call Redirection.
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 incoming calls. Entering n
prevents trunk-to-trunk transfers involving trunks in this group.
Administrator's Guide for Avaya Communication Manager
Direction field is incoming or two-way. (If the
Trunk-to-Trunk Transfer
field on the
November 2003