Seq: 43252 INVITE Contact: <sip:burroughs@h323-gateway.com;transport=tcp> M10 SIP/2.0 180 Ringing Via: SIP/2.0/TCP 3.4.5.6:5060; branch=z9hG4bK452.1 Via: SIP/2.0/TCP 2.3.4.5:4344;branch=z9hG4bK544 From: ksip:burroughs@h323-gateway.com>;tag=3q526g45 To: <sip:stibitz@proxy.com>;tag=19 Call-ID: 526272332146783569054 CSeq: 43252 INVITE Contact: <sip:gstibitz123@snailmail.com;transport=tcp> Content-Length: 0 M11 SIP/2.0 180 Ringing Via: SIP/2.0/TCP 2.3.4.5:4344;branch=z9hG4bK544 From: <sip:burroughs@h323-gateway.com To: <sip:stibitz@proxy.com>;tag=1926 Call-ID: 526272332146783569054 CSeq: 43252 INVITE Contact: ksip:gstibitz123@snailmail.com;transport=tcp: Content-Length: 0 M12 Alerting M13 Alerting M14 SIP/2.0 200 OK Via: SIP/2.0/TCP 3.4.5.6:5060; branch=z9hG4bK452.1 Via: SIP/2.0/TCP 2.3.4.5:4344;branch=z9hG4bk544 From: k<sip:burroughs@h323-gateway.com>;tag=3q526g45 To: ksip:stibitz@proxy.com>;tag=1926 Call Flow Examples Call-ID: 526272332146783569054 CSeq: 43252 INVITE Contact: <sip:gstibitz123@snailmail.com;transport=tcp: Content-Type: application/sdp Content-Length: 134 o=George 2890844576 2890844576 IN IP4 4.30.19.04 t=0 0 C=IN IP4 4.30.19.04 m=audio 5004 RTP/AVP 0 a=rtpmap: 0 PCMU/8000 SIP/2.0 200 OK Via: SIP/2.0/TCP 2.3.4.5:4344;branch=z9hG4bK544 From: sip:burroughs@h323-gateway.com>;tag=3q526g45 To: <sip:stibitz@proxy.com>;tag=1926 Call-ID: 526272332146783569054 CSeq: 43252 INVITE Contact: <sip:gstibitz123@snailmail.com> Content-Type: application/sdp Content-Length: 134 o=George 2890844576 2890844576 IN IP4 4.30.19.04 C=IN IP4 4.30.19.04 m=audio 5004 RTP/AVP 0 a=rtpmap: 0 PCMU/8000 M16 Connect M17 Connect M18 TerminalCapabilitySet M19 TerminalCapabilitySet M20 TerminalCapabilitySetAck M21 TerminalCapabilitySetAck M22 TerminalCapabilitySet SIP: Understanding the Session Initiation Protocol M23 TerminalCapabilitySet M24 TerminalCapabilitySetAck M25 TerminalCapabilitySetAck M26 MasterSlaveDetermination M27 MasterSlaveDetermination M28 MasterSlaveDeterminationAck M29 MasterSlaveDeterminationAck M30 OpenLogicalChann