l-ID: 49235243082018498@television.tv CSeq: 1 INVITE RSeq: 08071 Contact: <sip:50.60.70.80> Content-Type: application/sdp Content-Length: 139 o=Port1723 2890844535 2890844535 IN IP4 50.60.70.80 C=IN IP4 50.60.70.80 m=audio 62002 RTP/AVP 0 <Gateway selects u-Law codec a=rtpmap: 0 PCMU/8000 PRACK sip: 50.60.70.80 SIP/2.0 Via: SIP/2.0/UDP .19.19.06:5060;branch=z9hG4bK454 Max-Forwards: 70 From: <sip:filo.farnsworth@television.tv>;tag=37 To: sip:+12025551313@gw.carrier.com;user=phone>;tag=12 Call-ID: 19235243082018498@television.tv CSeq: 2 PRACK Contact: sip:filo.farnsworth@studio.television.tv RACK: 08071 1 INVITE Content-Length: 0 SIP/2.0 200 OK Via: SIP/2.0/UDP 3.19.19.06:5060;branch=z9hG4bK454 From: <sip:filo.farnsworth@television.tv>;tag=37 To: <sip:+12025551313@gw.carrier.com;user=phone>;tag=12 Call-ID: 49235243082018498@television.tv CSeq: 2 PRACK Call Flow Examples SIP/2.0 200 OK Via: SIP/2.0/UDP .19.19.06:5060;branch=z9hG4bK4545 From: <sip:filo.farnsworth@television.tv>;tag=12 To: P+12025551313@gw.carrier.com;user=phone>;tag=37 Call-ID: 49235243082018498@television.tv CSeq: 1 INVITE Contact: <sip:50.60.70.80> Content-Type: application/sdp Content-Length: 139 o=Port1723 2890844535 2890844535 IN IP4 50.60.70.80 C=IN IP4 50.60.70.80 m=audio 62002 RTP/AVP 0 a=rtpmap: 0 PCMU/8000 ACK sip:50.60.70.80 SIP/2.0 Via: SIP/2.0/UDP 8.19.19.06:5060;branch=z9hG4bkfgrw Max-Forwards: 70 From: <sip:filo.farnsworth@television.tv>;tag=12 To: <+12025551313@gw.carrier.com;user=phone>;tag=37 Call-ID: 49235243082018498@television.tv CSeq: 1 ACK BYE sip:50.60.70.80 SIP/2.0 Via: SIP/2.0/UDP 18.19.19.06:5060;branch=z9hG4bK321 Max-Forwards: 70 From: <sip:filo.farnsworth@television.tv>;tag=12 To: +12025551313@gw.carrier.com;user=phone>;tag=37 Call-ID: 49235243082018498@television.tv CSeq: 3 BYE <CSeq incremented M11 REL CauseCode=16 Normal Clearing SIP/2.0 200 OK Via: SIP/2.0/UDP 8.19.19.06:5060branch=z9hG4bK321 From: <sip:filo.farnsworth@television.tv>;tag=12 To: +12025551313@gw.carrier.com;user=phone>;tag=37 Call-ID: 49235243082018498@