-----Original Message----- From: sip-implementors-boun...@lists.cs.columbia.edu [mailto:sip-implementors-boun...@lists.cs.columbia.edu] On Behalf Of Nitin Kapoor Sent: Wednesday, May 12, 2010 11:12 AM To: sip-implementors@lists.cs.columbia.edu Subject: [Sip-implementors] 183 without SDP stops the local ringing
Hi All, I have the issue with one of my call flow. Call flow is like that # "UAC <-----SBC <-----> Microsoft OCS <------> UAS" Now basically we sends initial invite to termination UA and after that we got 183 with SDP(which means the early media get started) on which it asked PRACK and then my source ua sends the 200 OK in the correspondence of this message. >From here remote entity sends the another 183 without SDP and after that it sends 180 Ringing which starts the local ringing on my phone( and the early media stopped after getting 180 Ringing). Afterwards my termination UA sends the another 183 without SDP, but unfortunately it stops the ringing on my source UA. Now I have the below doubts: 1) Is that the correct behavior that after getting 183 without SDP the ringing get stopped, because 183 doesn't have the SDP which means it should not generate the ring for destination country. [Uttam Sarkar] If the SDP is unavailable then it should play the local ring define in that User Agent. 2) In which scenario we are ideally getting 183 without SDP after getting 180 from UAS. [Uttam Sarkar] You may have sent the call to a proxy. Proxy is forwarding the call to different Contacts of an AoR. Proxy might forward those different provisional response ((183, 180 etc) from different Contacts to you. Thanks, Nitin Kapoor _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
