Hi All, Please clarify how to handle the below requirement of rfc 3261in case of 3 scenarios: The UAS MUST ensure that the session description overlaps with its previous session description in media formats, transports, or other parameters that require support from the peer.
1. User A and User B are in connected state and user A receives a re-INVITE without offer. in this case the OFFER sent in 2xx (which is expected to be like an initial offer) may vary with the existing ongoing session's negotiated parameters. is it ok if user A sends offer with all capabilities even if it knows that user B des not support all the capabilities.Can user A receive re-INVITE without offer from a proxy?? 2. User A and User B are on HOLD and user A receives a re-INVITE without offer. then what should be the direction mode in offer?? 3. User A and User B are in a FAX session (which was negotiated through re-INVITE after audio session) and user A receives a re-INVITE without offer, what shoud the offer contain audio media stream details or fax media stream details. Also if a SIP Stack supports RFC 3407(Session Description Protocol (SDP) Simple Capability Declaration) can it override the above requirement ie., the offer in 2xx will contain the negotiated media stream and include the capability specific attributes which includes all the media formats, all parameters etc. Many thanks in advance for your precious time.. Regards, Sunil _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
