>From RFC 3264 An Offer/Answer Model Session Description Protocol: Once the offerer has sent the offer, it MUST be prepared to receive media for any recvonly streams described by that offer. It MUST be prepared to send and receive media for any sendrecv streams in the offer, and send media for any sendonly streams in the offer (of course, it cannot actually send until the peer provides an answer with the needed address and port information). In the case of RTP, even though it may receive media before the answer arrives, it will not be able to send RTCP receiver reports until the answer arrives.
When are you sending the offer? -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Vimal Bhat Sent: 16 January 2006 22:57 To: [email protected] Subject: [Sip-implementors] Loss of some initial RTP media packets. Hi All, We are facing a problem of loss of some intial RTP media packets from the call originating(UAC) device to call termination (UAS) device. The problem is that on UAC we start the sending the RTP media as soon as we send out ACK for the INVITE, but on UAS we open the RTP ports only when the ACK is received. So because of this first few packets may be droped on UAS side if the RTP packet reach UAS before the ACK(which is possible on the UDP transport) Kindly let us know your views on the above problem. Regards, Vimal _______________________________________________ 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
