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QSIG
DEFINITY Enterprise Communications Server Release 8.2
Overview
555-233-002
Issue 1
April 2000
Manufacturer-Specific Information (MSI)
QSIG handles non-standardized information that is specific to a particular PBX or
network. This information is known as Manufacturer Specific Information (MSI). A
manufacturer can define manufacturer-specific supplementary services operations after it
has:
■ Applied to a sponsoring and issuing organization (ECMA or European Computer
Manufacturers Association in this case)
■ Been assigned an organization identifier. This organization identifier is used as the
root of the manufacturer-specific service-operation value.
All MSI operation values should be unique to that manufacturer.
Manufacturer-specific supplementary services can be created using specific operations
encoded with the manufacturer’s identifier. DEFINITY ECS supports non-QSIG
applications that transport information across QSIG networks in MSI. Applications now
have the same functionality over QSIG networks that they have over non-QSIG networks.
Applications that use MSI include Centralized Attendant Service, Transfer to Audix, Best
Service Routing, and QSIG VALU.
Path Replacement
With this feature, a call’s connections between switches in a private network can be
replaced with new connections while the call is active. This feature is invoked when a call
is transferred and improvements may be made in costs. For example, after a call is
transferred, the two parties on the transferred call can be connected directly and the
unnecessary trunks are dropped off the call. The routing administered at the endpoints
may allow for a more cost-effective connection.
Call Forwarding (Diversion)
QSIG Call Forwarding (Diversion) is based on the DEFINITY ECS Call Forwarding
feature. It extends the feature transparency aspects of Call Forwarding over a QSIG
trunk:
■ If QSIG Call Forwarding is activated, all calls are diverted immediately.
■ If QSIG Call Forwarding with Busy/Don’t Answer is activated and a station is busy,
a call is diverted immediately.
233002_1.book Page 112 Monday, February 21, 2000 8:28 AM