A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : SIP Offer/Answer with Multipart Alternative
Author(s) : D. Wing, C. Jennings
Filename : draft-jennings-sipping-multipart-01.txt
Pages : 13
Date : 2005-7-12
SIP needs a mechanism for general backwards compatibility for moving
from SDP to SDPng or moving from non end-to-end encrypted SDP to end-
to-end encrypted SDP. This document specifies how a SIP offer uses
multipart/alternative, and how an answer indicates which part was
selected.
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-jennings-sipping-multipart-01.txt
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