> Before final ACK if the Stack received CANCEL message > from terminal. then it should response with > "487 Request Terminated" ?
If your question is about a 487 response to INVITE, the answer is no since you have already sent a final response. If your question is about a 487 response to CANCEL, the answer is no since your race condition would result in a 200 (or maybe 481) response. Aspects (from an INVITE 2xx perspective) are discussed within RFC 5407 section 3.1.2. I assume 200 response is correct while within Completed state; however I didn't recheck the RFC 3261 and RFC 6026 state machines concerning the topic. _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
