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Feature Reference
Separation of Bearer and Signaling
Administrator’s Guide for Avaya Communication Manager 1667
November 2003
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QSIG Path Replacement will work with SBS calls.
NOTE:
The entire SBS call, both the SBS signaling call and the associated SBS bearer call, will
be replaced. All separate calls (the original call, the call to the transferred-to party, and
then the path replacement call) will incur separate SBS delays if using SBS trunks.
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QSIG Enhanced Path Replacement will work with SBS calls. Multiple SBS delays apply.
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Non-Avaya QSIG MSI will be tandemed to/from any non-SBS QSIG leg of an SBS call
(at the SBS interworking node) and on the SBS signaling call (at an SBS tandem node) per
existing QSIG transit operation.
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QSIG MWI will work with SBS calls.
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QSIG Temporary Signaling Connections (TSCs), known as Call Independent Signaling
Connections (CISCs) in QSIG literature are supported. Non Call Associated Temporary
Signaling Connections (NCA TSCs) are signaling-only connections that transport feature
information. While NCA TSCs may be initiated as a result of some activity on a bearer
call, NCA TSCs are independent of bearer calls. They are set up as non-bearer calls and
use a call reference value (CRV) that is different than any CRV in use on any other
existing bearer or signaling call on that interface.
Communication Manager supports two different NCA TSC protocols administered via the
signaling group Supplementary Service Protocol field. This field is set to a for AT&T
NCA TSCs and to b is for QSIG NCA TSCs (CISCs).
For full QSIG functionality, the Supplementary Service Protocol field on both the trunk
group form and the signaling group form must be set to b (QSIG). This is necessary
because some QSIG features, such as QSIG Call Completion and QSIG Message Waiting
Indication, utilize QSIG feature signaling on both the bearer call and on an NCA TSC to
work properly.
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QSIG Centralized Attendant Service with MSI will work with SBS calls.
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QSIG transit capabilities are supported with SBS calls via tandeming of QSIG signaling
to/from any non-SBS QSIG leg of an SBS call (at the SBS interworking node), and on the
SBS signaling call (at an SBS tandem node), per existing QSIG transit operation.
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QSIG VALU signaling will work with SBS calls. The timer used to return QSIG VALU
Call Coverage calls back upon no answer may need to be increased so that SBS delays do
not cause such calls to be returned prematurely. This timer is administrable via the Local
Cvg Subsequent Redirection/CFWD No An Interval (rings) field on the change
System
Parameters Call Coverage / Call Forwarding screen.
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QSIG Called/Busy Name ID will be supported in the SBS signaling call.
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QSIG Calling/Connected Name/Number ID will be supported in the SBS signaling call.
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QSIG Call Offer will be supported as it would be over normal QSIG trunks.
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Automatic Alternate Routing (AAR) and/or Automatic Route Selection (ARS) can be
used to route the SBS signaling call. SBS bearer calls are routed using ARS only, but also
can be directed to AAR from ARS.
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SBS calls to an analog station endpoint will display the SBS signaling information if the
endpoint is served by a TN793 or TN2793 port.
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The Russian Transit/Power Industry Tie Trunk is expected to work as an associated bearer
trunk. However, it will not be tested, since the expectation is that it would never be used in
this fashion.