If I understand the description below correctly, sequential ring service is sequentially forkinging to different destinations. Dialog with B(sequential ring server) is different from dialog established with C (with a different To-tag). Hence 200 OK from C can contain a different SDP.
-Ramakrishna -----Original Message----- From: Nathan Ning [mailto:[EMAIL PROTECTED] Sent: Tuesday, October 11, 2005 12:26 PM To: Ramakrishna Adukuri (WT01 - Voice & Next Generation Networks) Cc: [EMAIL PROTECTED]; [email protected] Subject: Re: [Sip-implementors] 183 Early Media with SDP While there is real case that the UAC receives different SDP in 1XX and 200 OK, and should not ignore the SDP in 200 OK. Following is the case I met. A, B, C are sip UE. B owns sequential ring service(to C). A calls to B, B rings but not to answer B, timer expires, and C rings, C off hook. A talking to C. In the above case, when Invite request reach to B, B may response with 183(SDP) firstly to connect A to a media server to hear announcement. While the first call attempt will be cancelled, and when C off hook, A will got a 200 OK (SDP) related to C. thanks, Nathan Confidentiality Notice The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain confidential or privileged information. If you are not the intended recipient, please notify the sender at Wipro or [EMAIL PROTECTED] immediately and destroy all copies of this message and any attachments. _______________________________________________ Sip-implementors mailing list [email protected] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
