Hi, I can't see a definitive answer in RFC 3261
We send an INVITE we receive 100 Trying we receive 183 reliable with Route headers and a Contact we sent PRACK and honour the Route headers and Contact (3262 PRACK == in dialog message) we receive 200 for the PRACK We then send CANCEL in accordance with https://tools.ietf.org/html/rfc3261#section-9.1 we send this to the same destination as the original INVITE and don't include the Route headers or from the 183 I think this is the right thing to do but I also see CANCEL referred to as in-dialog so perhaps I'm wrong. Is there anything that I've overlooked that defines the correct behaviour to take in this instance. We have a query from a customer that they think that the CANCEL should be sent with the same Route headers as the PRACK. I'm thinking this could cause problems. Thanks in advance for any assistance Neil _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
