
qsig_tunneling_features.fm
A31003-H8022-F100-2-7618, October 2006
HiPath 8000 V2.2, Feature Description Guide
12-3
QSIG Tunneling Features
Functional Operation
● Section 9.1, Path Replacement
● Section 9.8, Additional Progress Description
SIP-Q also provides the following features network-wide:
● SIP-Q-to-SIP-Q pass-through—for example, when a legacy user is routed over IP to
another legacy user located a distance away. This capability can save TDM costs for an
enterprise.
● Failover recovery superior to that of H.323 standard communications.
12.2 Functional Operation
The following are the interworking requirements:
● Interworking between the HiPath 8000 and the HiPath 4000 requires the HiPath gateway
3540 (HG 3540) board, which is an integrated gateway used for IP network connectivity
that gives the HiPath 4000 access to IP-based trunking. It serves both line- and trunk-side
SIP interfaces.
● Interworking between the HiPath 8000 and a non-Siemens QSIG PBX requires the
RG 8700 gateway.
The following support is provided:
● SIP-Q session manager requirements
● ECMA 355 standards
● IPsec over SIP
The HiPath 8000 acts as a SIP user agent server (UAS) for outgoing calls on behalf of the
gateway. In the other direction, the HiPath 8000 acts as a SIP user agent client (UAC) for
incoming calls on behalf of the gateway.
12.3 Release Links
Release links are implemented as part of the SIP-Q functionality, and can also be used in a
mixed (multi-vendor) environment. Release links provide the following:
● A solution that optimizes the media path through the network
● A clean solution that allows for releasing unnecessary media and signalling links in mixed
networks
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