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DEFINITY ECS Release 8.2
Administrator’s Guide
555-233-506
Issue 1
April 2000
Features and technical reference
1562Trunk Flash
20
■ Tenant Partitioning
Station control of Trunk-to-Trunk Transfer is prohibited between trunks in
different tenant partitions if those partitions are restricted.
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 Central Office (CO) located directly
behind the DEFINITY System. 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 the DEFINITY system telephone on
an active trunk call. The Trunk Flash feature can help to reduce the number of
trunk lines connected to the DEFINITY switch 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 Dual-Tone Multi-Frequency (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
DEFINITY ECS.
When used by a Centralized Attendant Service (CAS) attendant connected to an
Release Link Trunk (RLT), the flash controls certain CAS features at the branch.
When used by a multifunction telephone or non-CAS attendant connected to a
CO, Foreign Exchange (FX), or Wide Area Telecommutings Service (WATS)
trunk, the flash controls certain features (such as add-on) at the connected CO.
Trunk Flash is not available on Personal Central Office Line (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.