
SIP and QoS Control
8/31/2005 Copyright - Ahlgren 2005 46
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SIP does not provide QoS support.
SIP can requests QoS via the notion of
preconditions.
ie. ask that resources are made available before
the phone rings.
Invitations might indicate in SDP that QoS
assurance is mandatory
All setup should only proceed after satisfying the
preconditions
SIP extension method (COMET) indicates the
success or failure of the preconditions.
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