Hi Nataraju, Thanks for your inputs. Sending different SDPs in multiple 1xx messages might be violating the offer-answer model, but if the first announcement is through reliable-1xx response and the subsequent announcement is with UPDATE, then I guess it should be technically right. Correct me if I am wrong.
Regards, Harlin ________________________________ From: Nataraju A.B [mailto:nataraju....@gmail.com] Sent: Tuesday, January 04, 2011 6:36 PM To: Vivek Talwar Cc: Harlin Dyvia Helina Sathianathan; $...@r\/|>r!`/@; Worley, Dale R (Dale); sip-implementors@lists.cs.columbia.edu Subject: Re: [Sip-implementors] Multiple early media sessions within a same dialog Hi All, with in the same session, playing announcements is not allowed. There could be only on dialog established between UAC and UAS1(to_tag1). But there could be multiple dialogs established @ UAC due to UAS1, UAS2, .... but not by the same UAS. Sending diferent SDPs in multiple 1xx messages would violate offer-answer model. if multiple dialogs were created in UAC / Proxy, care must be taken while passing the responses back to User_Application/UAC you can refer http://tools.ietf.org/html/draft-ietf-sipping-sip-offeranswer-13 for more details..... Thanks, Nataraju A.B. On Tue, Jan 4, 2011 at 11:48 AM, Vivek Talwar <vivek.tal...@aricent.com<mailto:vivek.tal...@aricent.com>> wrote: Hi Harlin, I think you want to play two sequential early media announcements back to back. This can be achieved with same tag but the server involved in SIP signaling for initiating early dialog have to take care of this. Thanks and Regards, Vivek Talwar ________________________________________ From: sip-implementors-boun...@lists.cs.columbia.edu<mailto:sip-implementors-boun...@lists.cs.columbia.edu> [sip-implementors-boun...@lists.cs.columbia.edu<mailto:sip-implementors-boun...@lists.cs.columbia.edu>] On Behalf Of Harlin Dyvia Helina Sathianathan Sent: Tuesday, January 04, 2011 11:34 AM To: $...@r\/|>r!`/@; Worley, Dale R (Dale) Cc: sip-implementors@lists.cs.columbia.edu<mailto:sip-implementors@lists.cs.columbia.edu> Subject: Re: [Sip-implementors] Multiple early media sessions within a same dialogHdOcDalPowerHogList Hi, Thanks all for your inputs. This is my query: An UAC sends INVITE to a soft switch and the soft switch needs to play two early announcements to the UAC and then connect the call to the destined user. So, the early announcements are played using Reliable Provisional Responses with same tags. Is it possible in real time to establish two early session (with same tag) between UAC and the soft switch ? Regards, Harlin ________________________________ From: $...@r\/|>r!`/@ [mailto:sarvpriyagu...@gmail.com<mailto:sarvpriyagu...@gmail.com>] Sent: Tuesday, January 04, 2011 9:16 AM To: Worley, Dale R (Dale) Cc: Harlin Dyvia Helina Sathianathan; sip-implementors@lists.cs.columbia.edu<mailto:sip-implementors@lists.cs.columbia.edu> Subject: Re: [Sip-implementors] Multiple early media sessions within a same dialog Hello guys, I gues he is only referring multiple announcements within the same dialog. He is not referring to multiple UACs. Harlin, Will you please explain iwhat exactly is your scenario. Is it different announcements to different UACs or multiple announcements to one UAC? cheers!! sarvpriya On Mon, Jan 3, 2011 at 11:29 PM, Worley, Dale R (Dale) <dwor...@avaya.com<mailto:dwor...@avaya.com><mailto:dwor...@avaya.com<mailto:dwor...@avaya.com>>> wrote: ________________________________________ From: sip-implementors-boun...@lists.cs.columbia.edu<mailto:sip-implementors-boun...@lists.cs.columbia.edu><mailto:sip-implementors-boun...@lists.cs.columbia.edu<mailto:sip-implementors-boun...@lists.cs.columbia.edu>> [sip-implementors-boun...@lists.cs.columbia.edu<mailto:sip-implementors-boun...@lists.cs.columbia.edu><mailto:sip-implementors-boun...@lists.cs.columbia.edu<mailto:sip-implementors-boun...@lists.cs.columbia.edu>>] On Behalf Of Harlin Dyvia Helina Sathianathan [harlin.sathianat...@aricent.com<mailto:harlin.sathianat...@aricent.com><mailto:harlin.sathianat...@aricent.com<mailto:harlin.sathianat...@aricent.com>>] ________________________________ No, since there can be only one session associated with a single dialog. But an INVITE can create multiple early dialogs by reaching multiple destinations, and so the UAC must be prepared to receive several early sessions simultaneously. Because 1xx responses are not sent reliably, the UAC may not receive SDP for some of the early sessions. The only way to distinguish them is by heuristic means. Dale _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu<mailto:Sip-implementors@lists.cs.columbia.edu><mailto:Sip-implementors@lists.cs.columbia.edu<mailto:Sip-implementors@lists.cs.columbia.edu>> https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors -- cheers!!!! sarvpriya http://sarvpriyak.blogspot.com/ ________________________________ "DISCLAIMER: This message is proprietary to Aricent and is intended solely for the use of the individual to whom it is addressed. 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