Avaya Communication Manager Administrator's Manual page 1331

Multifrequency-Signaling-Related Parameters
attendant
If Communication Manager receives this signal on DID calls, the call terminates at an attendant
regardless of the extension dialed. On DOD calls, this signal is sent to the CO if the CO
requests calling-category information and the originating extension is an attendant. This signal
is used on both DID and DOD calls.
busy-rt-attd
If Communication Manager receives this signal on DID calls, the call terminates at an attendant
if the called extension is busy or at the called extension if it is not busy. This signal is used on
DID calls.
data-call
This signal is treated the same as the data-verify signal except that it does not require a
terminating extension to be a data extension.
data-verify
If Communication Manager receives this signal on DID calls and the terminating extension is
not a data extension, it sends intercept treatment. On DOD calls, this signal is sent to the CO if
the CO requests calling-category information and the originating extension is a data extension.
This signal is used on both DID and DOD calls.
drop
When this signal is received from the CO, Communication Manager starts the disconnect
sequence and drops the call.
maint-call
The CO sends a signal to indicate that a call is a maintenance call and Avaya Communication
Manager prepares the special maintenance call sequences for the CO.
normal
This signal indicates that the caller is a normal subscriber. If it is received on a DID call, the call
is terminated at the called extension. For an outgoing MF signaling call that uses group II
signaling, this signal is sent to the CO when the CO requests calling-category information and
the originating extension is a station. This signal is used in both DID and DOD calls.
send-intercept
If Communication Manager receives this signal from the CO on a DID call, it returns group B
intercept signal to the CO.
Issue 2.1 May 2006 1331