
Notes
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Both H.323 and SIP are available on
CS1K to create Virtual Trunks.
SIP was introduced at Release 4 but is
now the preferred option and more
development has been done in Release
5 and 6 Much of this is relates to the
integration with Microsoft OCS and
Session Manager. Session Manager
only supports NCS and SIP.
SIP is seen as the future direction and
the addition of the SIP Line gateway and
SIP trunks underline this.
SIP uses either a SIP Redirect Server or
SIP Proxy Server to route calls between
endpoints. On the NRS this is selected
at configuration time however the
Session Manage only works as a SIP
Proxy.
H323 uses a Gatekeeper to route its
calls between endpoints.
CS 1000 Rel 7.5 08092801
Page 226
Copyright Amlex Associates Ltd
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