<RFC 3261 section 13.3.1.4 > If the INVITE request contained an offer, and the UAS had not yet sent an answer, the 2xx MUST contain an answer. <end>
If 180 was reliable , offer answer is over no need to send SDP in 2xx . But if 180 is not reliable then answer sdp must be present in 2xx -mahesh -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of River Sent: Thursday, July 05, 2007 1:09 PM To: [EMAIL PROTECTED] Subject: [Sip-implementors] Question about 200 OK for INVITE Hello All, I have a question about 200 OK for INVITE. Let's suppose an UAC sends out an INVITE/SDP, then the UAS replys with 180/SDP and 200 OK for the INVITE. Is it compulsory that the 200 OK for the INVITE also contain SDP (where the 180 Ringing already has SDP)? Thank you very much! Best Regards, River _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
