Features
555-230-024
A-48 Issue 5 January 1998
DEFINITY ECS provides 3 levels of QSIG functionality:
■Basic Call Setup — Supports basic call setup and number transport
■Basic Supplementary Services — Supports Name Identification Services,
Call Forwarding (Diversion), and Call Transfer
■Supplementary Services with Rerouting — Supports Call Forwarding
(Diversion) with Reroute and Call Transfer with Path Repl acement
QSIG Call Forwarding (Diversion)
QSIG Call Forwarding (Div ersion ) is based on th e DEFIN ITY E CS Call For wardin g
feature. It extends the feature transparency aspects of Call Forwarding over a
QSIG trunk:
■If QSIG Call Forwarding is activated, all calls are diverted im mediately.
■If QSIG Call Forwarding with busy/don’t answer is activated and a station
is busy, a call is diverted immediate ly.
■If QSIG Call Forwarding with busy/don’t answer is activated and a station
is idle but the call is not answered, a call is diverted afte r a specified
number of rings.
These features are activated either by dialing a feature access code or by
pressing a button. See Call Forwarding for detailed descriptions of how to us e
these features.
This feature applies to all QSIG Call Forwarding featu res. A forwarded call can be
rerouted in a private network to find a more cost-effective or resource-efficient
path.
QSIG Call Forwarding (Diversion) provides additional c all information to both the
caller and the diverted-to station above what is provided if the call is f orwarded
over a trunk that is not administered for QSIG Supplementary Service Protocol b.
QSIG Call Offer
This feature, on request from the call ing -us er (or o n th at user ’s b eha lf) , ena ble s a
call to:
■Be offered to a busy called-user
■Wait for a busy called-user to accept the call when the necessa ry
resources have become available.
QSIG Call Transfer
QSIG Call Transfer is based on the current DEFINITY ECS Transfer and
Trunk-to-Trunk Transfer features. QSIG Transfer signaling occurs as long as one
of the calls involves a QSIG trunk between the two swit ches. QSIG Transfer con-