Avaya Communication Manager Administrator's Manual page 1333

Multifrequency-Signaling-Related Parameters
last-digit
Communication Manager sends this signal to adjust the outpulsing pointer so that the last 2
digits can be resent. This signal is used on DOD calls.
last-2-digits
Communication Manager sends this signal to adjust the outpulsing pointer so that the last 3
digits can be resent. This signal is used on DOD calls.
last-3-digits
Communication Manager sends this signal to adjust the outpulsing pointer so that the last 4
digits can be resent. This signal is used on DOD calls.
next-digit
Communication Manager sends this signal to request the next digit. This signal is used on both
DID and DOD calls.
next-ani-digit
Communication Manager sends this signal to request the next ANI digit. This signal is used on
DID and DOD calls.
restart
Communication Manager sends this signal to request the whole digit string again. This signal is
used on DOD calls.
setup-sppath
The CO sends this signal to Communication Manager to set up a speech path. This signal is
used on DOD calls and on DID calls in Belgium.
Group B signals
Group B signals enhance group A signals for backward signaling from the destination end by
providing the status of the called party. In addition, if the originating media server or switch uses
group II signals, the destination end answers with group B signals. Group B signals are as
follows:
busy
This signal is sent to indicate that the called party is busy. On DID calls, the signal is sent to the
CO if there is no coverage point to terminate the call. If Communication Manager receives this
signal on DOD calls, it plays busy tone to the calling party and drops the trunk.
Issue 2.1 May 2006 1333