RFC 3311

The Session Initiation Protocol (SIP) UPDATE Method


Abstract

This specification defines the new UPDATE method for the Session
Initiation Protocol (SIP). UPDATE allows a client to update
parameters of a session (such as the set of media streams and their
codecs) but has no impact on the state of a dialog. In that sense,
it is like a re-INVITE, but unlike re-INVITE, it can be sent before
the initial INVITE has been completed. This makes it very useful for
updating session parameters within early dialogs.

Created by: oej, Last modification: Tue 27 of Jan, 2004 (18:47 UTC)
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