Comments inline. -Rockson -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bhandari, Ankit (Ankit) Sent: Saturday, November 08, 2008 1:33 AM To: [email protected] Subject: [Sip-implementors] Timer for Provisional response if UAC gets 180directly
Hi Everybody, I have small doubt regarding turning off the timer for provisional response. UAC UAS | | | ------- INVITE-----------------> | | | ( No 100 Trying , directly 180 / 183 ) |<--------183 Session Progress--| | | In this case even after receiving 1XX response UAC does not turnoff the timer kept for Provisional response for Invite. 1. Is it mandatory to send 100 Trying ? [RL] No, 100 is not mandatory if TU send 1xx,2xx in 200ms check sec 17.2.1 of RFC3261 2. 18X doesn't solve the purpose of 100 trying. In what all scenarios it is mandatory. [RL] I think 180 does indicate UAC that the request is received in UAS, and there's no need to retransmit it any more RFC3261, sec 17.1.1.2 If the client transaction receives a provisional response while in the "Calling" state, it transitions to the "Proceeding" state. In the "Proceeding" state, the client transaction SHOULD NOT retransmit the request any longer. Furthermore, the provisional response MUST be passed to the TU. Any further provisional responses MUST be passed up to the TU while in the "Proceeding" state. Needs your comment. Thank you Have a nice day !! Ankit Bhandari _______________________________________________ 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
