Re-INVITE shuould fail but call should remains active with original session.
- Vipul Rastogi -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Neranza Bundova Sent: Thursday, September 18, 2008 5:18 PM To: Somesh S. Shanbhag; [email protected] Subject: Re: [Sip-implementors] reject sdp offer with multiple media lines This is only an example exchange Lets A sends v=0 o=jljljl 231305716 231305716 IN IP4 1.1.1.1 s=- c=IN IP4 1.1.1.1 t=0 0 m=audio 34567 RTP/AVP 0 101 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=ptime:20 a=fmtp:101 0-11 B responds v=0 o=lilili 893456 893456 IN IP4 2.2.2.2 s=- c=IN IP4 2.2.2.2 t=0 0 m=audio 34577 RTP/AVP 0 101 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=ptime:20 a=fmtp:101 0-11 And the session is negotiated then A sends v=0 o=jljljl 231305716 231305717 IN IP4 1.1.1.1 s=- c=IN IP4 1.1.1.1 t=0 0 m=audio 0 RTP/AVP 0 101 a=rtpmap:0 PCMU/8000 a=rtpmap:101 telephone-event/8000 a=ptime:20 a=fmtp:101 0-11 m=image 10000 udptl t38 a=T38FaxVersion:0 a=T38MaxBitRate:14400 a=T38FaxFillBitRemoval:0 a=T38FaxTranscodingMMR:0 a=T38FaxTranscodingJBIG:0 a=T38FaxRateManagement:transferredTCF a=T38FaxMaxBuffer:200 a=T38FaxMaxDatagram:300 a=T38FaxUdpEC:t38UDPRedundancy And B does not support T38 ________________________________ From: Somesh S. Shanbhag [mailto:[EMAIL PROTECTED] Sent: Thursday, September 18, 2008 2:23 PM To: Neranza Bundova; [email protected] Subject: RE: [Sip-implementors] reject sdp offer with multiple media lines Can you please provide sample SDP of both sides? Somesh S Shanbhag M G L Bangalore -----Original Message----- From: [EMAIL PROTECTED] on behalf of Neranza Bundova Sent: Thu 9/18/2008 4:48 PM To: [email protected] Subject: [Sip-implementors] reject sdp offer with multiple media lines Hi All, I am not sure how a user agent should reject an offer when: UA "A" and UA "B" are in call and they have negotiated an audio session. UA "A" sends re-INVITE request to "B" with SDP that rejects the media by setting the port number to 0. UA "A" adds another media to the SDP offer that "B" understand but can not accept. 1. When UA "A" should release the resource used for the media stream? a. when an sdp answer from "B" is received b. when "A" sends the sdp offer. 2. What B will do in this situation? a. Will send sdp answer with all media ports set to 0? Should B close the dialog b. Will send 488 response i. A will close the dialog ii. A and B will continue the dialog and will use already negotiated media stream _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors ________________________________ EMAIL DISCLAIMER : This email and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. Any unauthorised distribution or copying is strictly prohibited. If you receive this transmission in error, please notify the sender by reply email and then destroy the message. Opinions, conclusions and other information in this message that do not relate to official business of Mascon shall be understood to be neither given nor endorsed by Mascon. Any information contained in this email, when addressed to Mascon clients is subject to the terms and conditions in governing client contract. Whilst Mascon takes steps to prevent the transmission of viruses via e-mail, we can not guarantee that any email or attachment is free from computer viruses and you are strongly advised to undertake your own anti-virus precautions. Mascon grants no warranties regarding performance, use or quality of any e-mail or attachment and undertakes no liability for loss or damage, howsoever caused. _______________________________________________ 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
