SIP: RFC3326(Reason header in SIP messages) RFC3372(SIGTRAN and SIP-T) RFC2327(sdp) RFC3398(ISUP-SIP Mapping) RFC3261(sip) RFC5806(Diversion Indication in SIP) RFC2833( DTMF ) RFC3362(t.38) RFC 3261(SIP 2.0) RFC3204(MIME media types for ISUP and QSIG Objects) RFC3578(Mapping of ISUP overlap to SIP) |