Hi, Please refer the below diagram
UAC ------------------------------------------------ INVITE--------------------------------------------------------------------------------------------> UAS UAC <---------------------------------------------100 Trying------------------------------------------------------------------------------------------- UAS UAC <-------------------------- 180 Ringing with header Server [wrong ABNF in that header value] -------------------------- UAS UAC <---------------------------- 200 OK with header Server [wrong ABNF in that header value] ------------------------------- UAS So in a call from when UAS is sending response [1xx and 200OK] with a Server header but with a faulty value in that header as per ABNF. All other headers values are perfect in those responses. Then UAC is not sending ACK and the call is not getting established. Is it an expected behaviour from UAC as per RFC? Thanks,Sourav _______________________________________________ Sip-implementors mailing list Sip-implementors@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
