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Feature Reference
Separation of Bearer and Signaling
1658 Administrator’s Guide for Avaya Communication Manager
November 2003
Separation of Bearer and Signaling
This feature is desined to help save on the costs of private, leased lines. It provides a low-cost, “virtual”
private network over IP trunks with the high voice quality expected of the public switched telephone
network (PSTN).
Brief description
SBS allows DCS+ customers to replace expensive VPN services if they need Dial Plan Expansion (DPE)
functionality. DCS does not work with 6- or 7-digit dial plans. Although QSIG does work with these
expanded dial plans, it does not work over VPNs. Customers can get enhanced signaling without private
leased lines.
SBS also provides a transport mechanism for application data and other enhanced functionality in
locations where ISDN trunking is unavailable or expensive.
The SBS feature supports:
•
QSIG private network signaling over a low-cost, IP-based network
•
Voice calls (bearer traffic) over the public switched telephone network
•
Correct association between QSIG feature signaling information and each voice call.
Considerations
You must always use AAR/ARS/UDP to originate an SBS call. You cannot use a Trunk Access Code or
Dial Access Code to originate an SBS call.
Proper administration and configuration is required for the SBS feature to work:
•
You must administer the Local Country Code and International Access Code fields correctly on
the
Feature-Related System Parameters screen.
•
You must set the SBS field to y on the Trunk Group screen for the IP trunk to be associated with
the SBS signaling group
•
You must set the SBS field to y on the Signaling Group screen for the signaling group to be used
(exclusively) for SBS signaling calls. The Trunk Group for NCA TSC field and Trunk Group for
Channel Selection field must both also be set to the number of the SBS signaling trunk group.
•
You must administer SBS Extensions on the Station screen in Avaya Communication Manager at
the SBS terminating nodes.
•
You must use the ISDN Numbering — Public/ Unknown screen to map the SBS Extension
numbers at the terminating nodes into a rational complete number (to which the originating node
will route the separate bearer call).
Call Detail Recording Considerations
CDR functionality records the Calling and Called number information and starting and ending time of
each measured call. This is administrable on a trunk group basis within Avaya Communication Manager.
At the end of a call, the information made available to an adjunct server for various functions, i.e. costing,
reports, traffic analysis.