> is that 2~3 183 w/sdp is valid and call can be processed? Yes; it is valid. However, RFC 6337 recommends to not include the SDP.
Maybe you will find the following snippet more clear concerning how the UAC MUST handle SDP contained within the subsequent 18x/2xx responses. RFC 3261 section 13.2.1: "The UAC MUST treat the first session description it receives as the answer, and MUST ignore any session descriptions in subsequent responses to the initial INVITE." _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
