Instruction manual

Networking and connectivity
555-233-767150 Issue 4 May 2003
QSIG/DCS voice mail interworking
QSIG/DCS Voice Mail Interworking is an enhancement to the current QSIG
feature. It integrates DCS and QSIG Centralized Voicemail via the DCS+/QSIG
gateway. Switches labeled DCS+/QSIG integrate multi-vendor PBXs into a single
voice messaging system. QSIG/DCS Voice Mail Interworking works on G3r,
G3si, and G3csi. It provides network flexibility, DCS functionality without a
dedicated T1.
Reroute after diversion to voice mail
Supports path optimization for calls that are diverted to a QSIG voice mail hunt
group. That is, the switch moves the call to the shortest route between the caller
and the voice mail system. For example, if user A on switch A calls user B on
switch B and the call goes to a voice mail system attached to switch C, then the
call is using up two trunks: A-B and B-C. If there is a trunk that directly connects
switches A and C, this feature will drop the A-B and B-C connection and set up a
new call from switch A to switch C, thus saving one trunk. The reroute happens
automatically; the user never knows that the extra trunk was dropped.
Stand-alone path replacement
Path Replacement is the process of routing an established call over a more
efficient path, after which the old call is torn down leaving those resources free.
Path Replacement offers potential savings by routing calls more efficiently, saving
resources and trunk usage.
Path replacement can exist as a stand-alone feature, or occur in the following
additional
cases:
■ Call Forwarding by Forward Switching supplementary service, including
the case where Call Diversion by Rerouting fails, and Call Forwarding is
accomplished via forward switching
■ Gateway scenarios where Communication Manager, serving as an
incoming or outgoing gateway, invokes PR to optimize the path between
the gateways
■ Calls in queue/vector processing even though no true user is on the call yet
■ QSIG Lookahead Interflow call, Best Service Route call, or adjunct route
Supplementary services and rerouting
The QSIG standard defines Supplementary Services as those service beyond voice
or data connectivity and number transport and display. Examples include call
forwarding, transfer and call hold.