Hi, I am not sure about your test scenario. IP PBX generally sends UPDATE to phone to check session status. Generally it happens in much complex scenario. By UPDATE, they are sure that phone is responding well. If callID does not exist on phone then also it send NACK. I hope this helps .... Vipul Rastogi Engineer, Business Management Team Telecommunication Network Business Samsung Electronics CO, LTD Suwon P.O.BOX 105, 416 Korea 442-600 MO 010-9530-0354 ----- Original Message ----- From: "Amit Lobo" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Thursday, November 15, 2007 1:11 PM Subject: [Sip-implementors] How to know active call status,using SIP
> Dear All, > > Is there any SIP method for a SIP server to know that endpoints are active > with a call?Specially when > RTP is running between the endpoints and not through the SIP server. > My working example is IPPBX(SIP server) connects call between two > endpoints,and for RTP session it sends > re-Invite by making RTP pass between endpoints.At this point time,is there > any SIP method for IPPBX to know > the call status.... > > > I am looking for a simple solution which can be implemented in short time. > > Thanks for you help in advance > > Amit > _______________________________________________ > 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
