Avaya Communication Manager Administrator's Manual page 1737

Considerations
NOTE:
The Trunk Flash feature allows the telephone user to receive central office dial tone, and
place a call that is not monitored by Communication Manager, and is not subject to
restrictions (toll, facilities restriction level (FRL), class of restriction (COR), etc.).
Therefore you should enable this feature with caution.
•
A Trunk Flash button can be assigned on CAS attendant consoles, non-CAS attendant consoles,
and multifunction telephones. For CAS attendants, use of this button is limited to certain CAS
features via RLT trunks. For multifunction and non-CAS attendant consoles, this button is used
for the Trunk Flash feature.
•
FAC activation of the trunk flash feature is allowed.
•
The Flash button is used by the Trunk Flash and CAS features.
•
System features (such as internal conference call, transfer, and call park) may be combined with
custom services (that is, CO-based features that are activated/controlled by sending a flash signal
over the trunk to the CO). However, mixing Avaya Communication Manager features with
custom services causes complications for the user when tracking a call. Communication Manager
cannot give the local telephone user status information on the custom services.
•
The Trunk Flash feature may only be accessed if the call has only one trunk, the trunk must be
outgoing from the PBX's perspective, and the trunk group of that trunk has Trunk Flash enabled.
The Trunk Flash feature is disabled when the call involves more than one trunk, even if all the
trunks have Trunk Flash enabled.
•
Any Communication Manager phone can flash and dial a FAC to access the Trunk Flash feature;
any Avaya Communication Manager telephone with a flash button can access the Trunk Flash
feature by hitting the flash button. The system allows as many as five telephones to participate in
a conference call with the trunk line party. However, to access the Trunk Flash feature, at least one
of the telephones must have a Flash button.
•
In a call involving more than one telephone, one of the telephones may press the Flash button, and
another telephone may dial the phone number. The telephone that dials the phone number is not
required to have a Flash button.
— If the far-end/CO does not support custom services, the call may be dropped by the
far-end/CO on sending the flash signal or the signal may be ignored and a click-click
sound is heard.
Administrator's Guide for Avaya Communication Manager
November 2003
Feature Reference
Trunk Flash
1737