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.

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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