Avaya Communication Manager Administrator's Manual page 1624

Screen Reference
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.
Valid entries
y
n
!
CAUTION:
Do not set this field to y unless you are certain that the far-end server/switch will
CAUTION:
provide answer supervision and disconnect supervision. Most public networks do
not provide disconnect supervision over analog trunks. Check with your network
services provider.
Disconnect Timing (msec)
This field specifies the minimum time in milliseconds that the central office or far-end media
server or switch requires to recognize that your end has disconnected from a call. This timer
does not affect ports on a circuit pack that uses the administrable Incoming Disconnect and
Outgoing Disconnect timers; in fact, settings on those two timers override this field.
Valid entries
140 to 2550 ms
in increments of
10
Disconnect Type
This field indicates which side or user controls the disconnect, where A refers to the calling
party and B refers to the called party. Appears only if the Country field is 15 and the Trunk
Type field is 2-wire-ac, 2-wire-dc, or 3-wire.
1624 Administrator Guide for Avaya Communication Manager
Usage
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.
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.
Usage
The default of 500 is an industry standard and you shouldn't change it. If
you set this field too high, your server/switch won't disconnect sometimes
when it should; too low, and it will disconnect when it shouldn't.