There will shortly be a new RFC for SIP. See the following for the current draft:
http://www.ietf.org/internet-drafts/draft-ietf-sip-rfc2543bis-09.txt There have been many, many improvements and corrections. The Contact header is now mandatory. cheers, (-:bob Robert F. Penfield Chief Software Architect Acme Packet, Inc. 130 New Boston Street Woburn, MA 01801 [EMAIL PROTECTED] ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Thursday, March 07, 2002 6:50 AM Subject: [Sip-implementors] INVITE contact header > Hi, > > I'm doing college work on SIP and reading RFC2543 and > the book "Understanding the Session Initiation Protocol" > (Alan B. Johnston). On page 56 it lists the Contact header > field of an INVITE Request as being mandatory but this > doesn't seem to be the case according to the RFC. Could > anyone please confirm if this is a mistake in the book. > > Thanks for your time, > David Cawley > > > > _______________________________________________ > Sip-implementors mailing list > [EMAIL PROTECTED] > http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors > _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
