IETF SIP RFC's, Drafts and Announcements

Internet-Drafts are are working documents and have no standards status. They are valid for six months, and may be updated, replaced or obsoleted at any time. An Internet-Draft should not be referenced by any paper or Request-for-Proposal, nor should a vendor claim compliance with an Internet-Draft.
These drafts are maintained by the Internet Engineering Task Force. For the complete documents, terms of use, copyright and authorship information, please visit www.ietf.org.
You will find all the latest SIP drafts and announcements here:
IETF Announcements Archive - Date Index
All SIP-related drafts
SIP-Related drafts and RFC's