Hi Chandan, I think the call flow you have mentioned has few things unclear..
VOIP 1 is at fault by not sending ACK to 487. If Cancel is retransmitted then it seems 200 OK for cancel is not processed by VOIP 1. This might be reason for missing ACK. But if Cancel is retransmitted and for every cancel if server is sending 481, then Server is working fine. But if Server is sending 481 without any trigger i.e. CANCEL/ACK then server is at fault. I hope I have not confused you. Regards Sunil Verma -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Chandan Kumar Sent: Wednesday, April 20, 2011 6:51 PM To: [email protected] Subject: [Sip-implementors] SIP request Cancel Issue Hi , Iam facing an issue with Cancel. Please find the Cancel.txt which has the call cancel sequence.. Voip-1 makes a call throough Server ,before Voip2 accepts it cancels call. 1)Voip-1 sends Cancel ,Server responds with 200 Ok. 2)Server sends 487 Request Termination ,But Voip1 is not responding .Whats exactly the issue here .?Please Can some one clarify here. 3) Voip1 sends Cancel request for which server responds with 481 call doesn't exist 4) Voip1 Sends ACK .Even After this Server keep sending 481 call doesn't exist. Voip 1: 10.32.140.122 Voip 2: 10.32.140.139 Server: 10.32.128.20 Please Can some one let me know where excatly the issue is. Best Regards, Ckumar. _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
