Hi, My concerns: 1. SHOULD the called party reply with 200 OK if the negotiation fails? 2. Why the first two tries to add speechsynth resource failed but the third success? 3. As my understanding, if the re-negotiation fails, it will not affect the current media. Best Regards, =========================================== Fanwen zhang FS5000 CPE IOT, Alcatel-Lucent Qingdao, R&D Tel: +86-532-88615493 Email:[EMAIL PROTECTED] ===========================================
________________________________ From: Srinivas [mailto:[EMAIL PROTECTED] Sent: Wednesday, January 16, 2008 9:30 PM To: [email protected] Subject: [Sip] regarding session modification Hi all, Consider the following scenarios. 1. C->S: INVITE (for speechrecog) S->C: 200 OK C->S: ACK Now the SIP session is established b/w UAC and UAS. speechrecog resource is active on the established sip session C->S: INVITE (re-INVITE for adding speechsynth resource) S->C: 200 OK Offer/Answer fail for the new resource, TTS (speechsynth). 2. C->S: INVITE (for speechrecog) S->C: 200 OK C->S: ACK Now the SIP session is established b/w UAC and UAS. speechrecog resource is active on the established sip session. C->S: INVITE (re-INVITE for adding speechsynth resource) S->C: 200 OK Offer/Answer fail for the for the existing ASR(speechrecog) resource also. 3. C->S: INVITE (for speechrecog) S->C: 200 OK C->S: ACK Now the SIP session is established b/w UAC and UAS. speechrecog resource is active C->S: INVITE (re-INVITE for adding speechsynth resource) S->C: 200 OK C->S: ACK Now both speechrecog and speechsynth are active on the sip session C->S: INVITE (re-INVITE for removing speechsynth resource) S->C: 486 BUSY HERE What should be the behaviour of UAC in the above scenarios? Regds, Srinivas
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