Trunk Flash - Avaya Communication Manager Administrator's Manual

Feature Reference

Trunk Flash

Trunk Flash
Trunk Flash allows a feature or function button on a multifunction telephone or attendant console to be
assigned as a Flash button. Pressing this button while connected to a trunk (which must have been
administered to allow trunk flash) causes the System to send a flash signal out over the connected trunk.
Trunk Flash enables multifunction telephones to access central office customized services that are
provided by the far-end or CO located directly behind the server running Communication Manager.
These central office customized services are electronic features, such as conference and transfer, that are
accessed by a sequence of flash signal and dial signals from a Communication Manager phone on an
active trunk call. The Trunk Flash feature can help to reduce the number of trunk lines connected to the
server running Communication Manager by:
•
Performing trunk-to-trunk call transfers at the far-end or CO, which eliminates the use of a second
trunk line for the duration of the call and frees the original trunk line for the duration of the call.
•
Performing a conference call with a second outside call party, which eliminates the need for a
second trunk line for the duration of the call.
NOTE:
Some analog DTMF telephone sets used in Italy and the United Kingdom are equipped
with a FLASH button that, when pressed, generates a rotary digit 1. When an analog
telephone which is administered as a DTMF telephone (for example, as a 2500 or
71nn-type telephone) transmits a rotary digit 1, the system treats the signal as a recall
signal from the telephone set to the Avaya Communication Manager.
When used by a CAS attendant connected to an RLT, the flash controls certain CAS features at the
branch. When used by a multifunction telephone or non-CAS attendant connected to a CO, FX, or WATS
trunk, the flash controls certain features (such as add-on) at the connected CO.
Trunk Flash is not available on PCOL groups.
The system supports the Trunk Flash signal for incoming, outgoing, or 2-way call directions on selected
2-wire analog (ground-start or loop-start) or digital (DS1) trunks or Tie trunks on DS1.
If the trunk group is a DS1 trunk in Italy, the Trunk Flash feature applies only to outgoing calls.
If the trunk is not directly connected to the far end or CO providing the customized services, use of the
Trunk Flash signal may cause the call to be disconnected by the far end or CO.
Calls made after the Flash are not recorded in CDR records.
1736 Administrator's Guide for Avaya Communication Manager
November 2003