D 14049.01
07.2007 38
TANDBERG VIDEO COMMUNICATION SERVER
ADMINISTRATOR GUIDE
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Introduction Getting
Started
System
Overview
System
Configuration
H.323 & SIP
Configuration
Registration
Control
Zones and
Neighbors
Call
Processing
Firewall
Traversal
Bandwidth
Control Maintenance Appe ndices
TANDBERG VIDEO COMMUNICATION SERVER
ADMINISTRATOR GUIDE
H.323 & SIP
Configuration

About Interworking

The VCS is able to act as a gateway betwe en
SIP and H.323, translating calls fr om one
protocol to the other. This is known as
“interworking”.
By default, the VCS will act as a SIP -H.323
gateway but only if at least one of the
endpoints is locally register ed.
You can add an additional option key tha t will
allow the VCS to act as SIP-H.323 ga teway
regardless of whether the endp oints are
locally registered. Contac t your TANDBERG
representative for fur ther information.
In either case, you also always have the opt ion
to disable interworking.
An interworking call is a trav ersal call, and will
therefore consume one traver sal licence for
the duration of the call.
Interworking

Overview Configuring Interworking

Interworking is enabled v ia:
VCS Configuration > Protocols > Interwor king.
You will be taken to the Interworking p age.
xConfiguration Interworking Mode

H.323 <-> SIP interworking mod e

Determines whether or not the VC S will act as a gateway between SIP an d H.323 calls.
Off: the VCS will not act as a SIP- H.323 gateway.
RegisteredOnly: the VCS will ac t as a SIP-H.323 gateway but onl y if at least one of the endpoints is
locally registered.
On: the VCS will act as SIP-H.323 ga teway regardless of whether th e endpoints are locally
registered. You must have the appropr iate option key enabled to use this fe ature.
!
A call between two H.323 endpoi nts
each registered to a differen t VCS may
be routed in such a way that it is
interworked from H.323 to SIP an d back to
H.323. (For example, if the two VCSs are o nly
able to connect via SIP.) In this case, the two
H.323 endpoints involved must sup port H.263
video. If they do not (for example, if H.26 3
has been disabled) the call will stil l be
established but it will be audio on ly.
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