[Users] Call dropped after 6 ACKs. Branch=0 problem?

I have the following scenario: PSTN gateway (202.180.nnn.nnn) -> OpenSER 1.0.1 (147.202.nnn.nnn) -> Asterisk 1.2.16 (203.89.nnn.nnn) When an incoming call is received, the call is established but often (but not always) eventually dropped. In the following dialogue, it can be seen that when the ACK is passed from the gateway on to Asterisk, OpenSER appends a Via with branch=0. After a number of these ACKs are passed on, the call is eventually dropped. It has been suggested by someone on the Asterisk list that "While "branch=0" is valid in RFC 2543, I don't think an INVITE can start-off as RFC 3261 and then the ACK can switch over to RFC 2543 in the middle of the transaction." i.e. the implication is that it's an OpenSER problem. Does that seem right? If so how can it be corrected? If not, could anyone advise what the problem might be or suggest any resolutions? U 202.180.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 INVITE sip:6499777777@domain.co.nz SIP/2.0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz> Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Max-Forwards: 70 Date: Mon, 02 Apr 2007 02:53:24 GMT Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Content-Type: application/sdp Content-Length: 336 v=0 o=root 8802 8802 IN IP4 202.180.nnn.nnn s=session c=IN IP4 202.180.nnn.nnn t=0 0 m=audio 35268 RTP/AVP 18 97 3 0 8 101 a=rtpmap:18 G729/8000 a=fmtp:18 annexb=no a=rtpmap:97 iLBC/8000 a=rtpmap:3 GSM/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - U 147.202.nnn.nnn:5060 -> 202.180.nnn.nnn:5060 SIP/2.0 100 trying -- your call is important to us Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE Server: OpenSer (1.0.1 (i386/linux)) Content-Length: 0 Warning: 392 147.202.nnn.nnn:5060 "Noisy feedback tells: pid=29716 req_src_ip=202.180.nnn.nnn req_src_port=5060 in_uri=sip:6499777777@domain.co.nz out_uri=sip:6499777777@203.89.nnn.nnn via_cnt==1" U 147.202.nnn.nnn:5060 -> 203.89.nnn.nnn:5060 INVITE sip:6499777777@203.89.nnn.nnn SIP/2.0 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=z9hG4bKd5ab.736d6085.0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz> Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Max-Forwards: 69 Date: Mon, 02 Apr 2007 02:53:24 GMT Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Content-Type: application/sdp Content-Length: 336 v=0 o=root 8802 8802 IN IP4 202.180.nnn.nnn s=session c=IN IP4 202.180.nnn.nnn t=0 0 m=audio 35268 RTP/AVP 18 97 3 0 8 101 a=rtpmap:18 G729/8000 a=fmtp:18 annexb=no a=rtpmap:97 iLBC/8000 a=rtpmap:3 GSM/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - U 147.202.nnn.nnn:5060 -> 203.89.nnn.nnn:5060 INVITE sip:6499777777@203.89.nnn.nnn SIP/2.0 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=z9hG4bKd5ab.736d6085.0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz> Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Max-Forwards: 69 Date: Mon, 02 Apr 2007 02:53:24 GMT Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Content-Type: application/sdp Content-Length: 336 v=0 o=root 8802 8802 IN IP4 202.180.nnn.nnn s=session c=IN IP4 202.180.nnn.nnn t=0 0 m=audio 35268 RTP/AVP 18 97 3 0 8 101 a=rtpmap:18 G729/8000 a=fmtp:18 annexb=no a=rtpmap:97 iLBC/8000 a=rtpmap:3 GSM/8000 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - U 203.89.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 SIP/2.0 100 Trying Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=z9hG4bKd5ab.736d6085.0;received=147.202.nnn.nnn Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Contact: <sip:6499777777@203.89.nnn.nnn> Content-Length: 0 U 203.89.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=z9hG4bKd5ab.736d6085.0;received=147.202.nnn.nnn Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Contact: <sip:6499777777@203.89.nnn.nnn> Content-Type: application/sdp Content-Length: 244 v=0 o=root 16300 16300 IN IP4 203.89.nnn.nnn s=session c=IN IP4 203.89.nnn.nnn t=0 0 m=audio 19952 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - U 147.202.nnn.nnn:5060 -> 202.180.nnn.nnn:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Contact: <sip:6499777777@203.89.nnn.nnn> Content-Type: application/sdp Content-Length: 244 v=0 o=root 16300 16300 IN IP4 203.89.nnn.nnn s=session c=IN IP4 203.89.nnn.nnn t=0 0 m=audio 19952 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - U 203.89.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=z9hG4bKd5ab.736d6085.0;received=147.202.nnn.nnn Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Contact: <sip:6499777777@203.89.nnn.nnn> Content-Type: application/sdp Content-Length: 244 v=0 o=root 16300 16301 IN IP4 203.89.nnn.nnn s=session c=IN IP4 203.89.nnn.nnn t=0 0 m=audio 19952 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - U 147.202.nnn.nnn:5060 -> 202.180.nnn.nnn:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Contact: <sip:6499777777@203.89.nnn.nnn> Content-Type: application/sdp Content-Length: 244 v=0 o=root 16300 16301 IN IP4 203.89.nnn.nnn s=session c=IN IP4 203.89.nnn.nnn t=0 0 m=audio 19952 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - U 202.180.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 ACK sip:6499777777@203.89.nnn.nnn SIP/2.0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK013cd54d;rport Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 ACK User-Agent: Asterisk PBX Max-Forwards: 70 Content-Length: 0 U 147.202.nnn.nnn:5060 -> 203.89.nnn.nnn:5060 ACK sip:6499777777@203.89.nnn.nnn SIP/2.0 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK013cd54d;rport=5060 From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 ACK User-Agent: Asterisk PBX Max-Forwards: 69 Content-Length: 0 U 202.180.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 ACK sip:6499777777@203.89.nnn.nnn SIP/2.0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK54b95a19;rport Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 ACK User-Agent: Asterisk PBX Max-Forwards: 70 Content-Length: 0 U 147.202.nnn.nnn:5060 -> 203.89.nnn.nnn:5060 ACK sip:6499777777@203.89.nnn.nnn SIP/2.0 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK54b95a19;rport=5060 From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 ACK User-Agent: Asterisk PBX Max-Forwards: 69 Content-Length: 0 U 203.89.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=z9hG4bKd5ab.736d6085.0;received=147.202.nnn.nnn Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Contact: <sip:6499777777@203.89.nnn.nnn> Content-Type: application/sdp Content-Length: 244 v=0 o=root 16300 16300 IN IP4 203.89.nnn.nnn s=session c=IN IP4 203.89.nnn.nnn t=0 0 m=audio 19952 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - U 147.202.nnn.nnn:5060 -> 202.180.nnn.nnn:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Contact: <sip:6499777777@203.89.nnn.nnn> Content-Type: application/sdp Content-Length: 244 v=0 o=root 16300 16300 IN IP4 203.89.nnn.nnn s=session c=IN IP4 203.89.nnn.nnn t=0 0 m=audio 19952 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - U 202.180.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 ACK sip:6499777777@203.89.nnn.nnn SIP/2.0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK46a352b9;rport Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 ACK User-Agent: Asterisk PBX Max-Forwards: 70 Content-Length: 0 U 147.202.nnn.nnn:5060 -> 203.89.nnn.nnn:5060 ACK sip:6499777777@203.89.nnn.nnn SIP/2.0 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK46a352b9;rport=5060 From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 ACK User-Agent: Asterisk PBX Max-Forwards: 69 Content-Length: 0 U 203.89.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=z9hG4bKd5ab.736d6085.0;received=147.202.nnn.nnn Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Contact: <sip:6499777777@203.89.nnn.nnn> Content-Type: application/sdp Content-Length: 244 v=0 o=root 16300 16300 IN IP4 203.89.nnn.nnn s=session c=IN IP4 203.89.nnn.nnn t=0 0 m=audio 19952 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - U 147.202.nnn.nnn:5060 -> 202.180.nnn.nnn:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Contact: <sip:6499777777@203.89.nnn.nnn> Content-Type: application/sdp Content-Length: 244 v=0 o=root 16300 16300 IN IP4 203.89.nnn.nnn s=session c=IN IP4 203.89.nnn.nnn t=0 0 m=audio 19952 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - U 202.180.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 ACK sip:6499777777@203.89.nnn.nnn SIP/2.0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK2da46c51;rport Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 ACK User-Agent: Asterisk PBX Max-Forwards: 70 Content-Length: 0 U 147.202.nnn.nnn:5060 -> 203.89.nnn.nnn:5060 ACK sip:6499777777@203.89.nnn.nnn SIP/2.0 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK2da46c51;rport=5060 From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 ACK User-Agent: Asterisk PBX Max-Forwards: 69 Content-Length: 0 U 203.89.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=z9hG4bKd5ab.736d6085.0;received=147.202.nnn.nnn Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Contact: <sip:6499777777@203.89.nnn.nnn> Content-Type: application/sdp Content-Length: 244 v=0 o=root 16300 16300 IN IP4 203.89.nnn.nnn s=session c=IN IP4 203.89.nnn.nnn t=0 0 m=audio 19952 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - U 147.202.nnn.nnn:5060 -> 202.180.nnn.nnn:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Contact: <sip:6499777777@203.89.nnn.nnn> Content-Type: application/sdp Content-Length: 244 v=0 o=root 16300 16300 IN IP4 203.89.nnn.nnn s=session c=IN IP4 203.89.nnn.nnn t=0 0 m=audio 19952 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - U 202.180.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 ACK sip:6499777777@203.89.nnn.nnn SIP/2.0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK23a5accc;rport Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 ACK User-Agent: Asterisk PBX Max-Forwards: 70 Content-Length: 0 U 147.202.nnn.nnn:5060 -> 203.89.nnn.nnn:5060 ACK sip:6499777777@203.89.nnn.nnn SIP/2.0 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK23a5accc;rport=5060 From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 ACK User-Agent: Asterisk PBX Max-Forwards: 69 Content-Length: 0 U 203.89.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=z9hG4bKd5ab.736d6085.0;received=147.202.nnn.nnn Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Contact: <sip:6499777777@203.89.nnn.nnn> Content-Type: application/sdp Content-Length: 244 v=0 o=root 16300 16300 IN IP4 203.89.nnn.nnn s=session c=IN IP4 203.89.nnn.nnn t=0 0 m=audio 19952 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - U 147.202.nnn.nnn:5060 -> 202.180.nnn.nnn:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Contact: <sip:6499777777@203.89.nnn.nnn> Content-Type: application/sdp Content-Length: 244 v=0 o=root 16300 16300 IN IP4 203.89.nnn.nnn s=session c=IN IP4 203.89.nnn.nnn t=0 0 m=audio 19952 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - U 202.180.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 ACK sip:6499777777@203.89.nnn.nnn SIP/2.0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK153c7273;rport Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 ACK User-Agent: Asterisk PBX Max-Forwards: 70 Content-Length: 0 U 147.202.nnn.nnn:5060 -> 203.89.nnn.nnn:5060 ACK sip:6499777777@203.89.nnn.nnn SIP/2.0 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK153c7273;rport=5060 From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 ACK User-Agent: Asterisk PBX Max-Forwards: 69 Content-Length: 0 U 203.89.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=z9hG4bKd5ab.736d6085.0;received=147.202.nnn.nnn Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Contact: <sip:6499777777@203.89.nnn.nnn> Content-Type: application/sdp Content-Length: 244 v=0 o=root 16300 16300 IN IP4 203.89.nnn.nnn s=session c=IN IP4 203.89.nnn.nnn t=0 0 m=audio 19952 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - U 147.202.nnn.nnn:5060 -> 202.180.nnn.nnn:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Contact: <sip:6499777777@203.89.nnn.nnn> Content-Type: application/sdp Content-Length: 244 v=0 o=root 16300 16300 IN IP4 203.89.nnn.nnn s=session c=IN IP4 203.89.nnn.nnn t=0 0 m=audio 19952 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - U 202.180.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 ACK sip:6499777777@203.89.nnn.nnn SIP/2.0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK01e676a5;rport Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 ACK User-Agent: Asterisk PBX Max-Forwards: 70 Content-Length: 0 U 147.202.nnn.nnn:5060 -> 203.89.nnn.nnn:5060 ACK sip:6499777777@203.89.nnn.nnn SIP/2.0 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK01e676a5;rport=5060 From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 ACK User-Agent: Asterisk PBX Max-Forwards: 69 Content-Length: 0 U 203.89.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=z9hG4bKd5ab.736d6085.0;received=147.202.nnn.nnn Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Contact: <sip:6499777777@203.89.nnn.nnn> Content-Type: application/sdp Content-Length: 244 v=0 o=root 16300 16300 IN IP4 203.89.nnn.nnn s=session c=IN IP4 203.89.nnn.nnn t=0 0 m=audio 19952 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - U 147.202.nnn.nnn:5060 -> 202.180.nnn.nnn:5060 SIP/2.0 200 OK Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0b505d2b;rport=5060 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 INVITE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Contact: <sip:6499777777@203.89.nnn.nnn> Content-Type: application/sdp Content-Length: 244 v=0 o=root 16300 16300 IN IP4 203.89.nnn.nnn s=session c=IN IP4 203.89.nnn.nnn t=0 0 m=audio 19952 RTP/AVP 0 8 101 a=rtpmap:0 PCMU/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:101 telephone-event/8000 a=fmtp:101 0-16 a=silenceSupp:off - - - - U 202.180.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 ACK sip:6499777777@203.89.nnn.nnn SIP/2.0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0a0ddae8;rport Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 ACK User-Agent: Asterisk PBX Max-Forwards: 70 Content-Length: 0 U 147.202.nnn.nnn:5060 -> 203.89.nnn.nnn:5060 ACK sip:6499777777@203.89.nnn.nnn SIP/2.0 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK0a0ddae8;rport=5060 From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 102 ACK User-Agent: Asterisk PBX Max-Forwards: 69 Content-Length: 0 U 202.180.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 BYE sip:6499777777@203.89.nnn.nnn SIP/2.0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK12646817;rport Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 103 BYE User-Agent: Asterisk PBX Max-Forwards: 70 Content-Length: 0 U 147.202.nnn.nnn:5060 -> 203.89.nnn.nnn:5060 BYE sip:6499777777@203.89.nnn.nnn SIP/2.0 Record-Route: <sip:147.202.nnn.nnn;ftag=as3f0f7d93;lr=on> Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=z9hG4bKe5ab.311dd295.0 Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK12646817;rport=5060 From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Contact: <sip:6494444444@202.180.nnn.nnn> Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 103 BYE User-Agent: Asterisk PBX Max-Forwards: 69 Content-Length: 0 U 203.89.nnn.nnn:5060 -> 147.202.nnn.nnn:5060 SIP/2.0 481 Call leg/transaction does not exist Via: SIP/2.0/UDP 147.202.nnn.nnn;branch=z9hG4bKe5ab.311dd295.0;received=147.202.nnn.nnn Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK12646817;rport=5060 From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 103 BYE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Content-Length: 0 U 147.202.nnn.nnn:5060 -> 202.180.nnn.nnn:5060 SIP/2.0 481 Call leg/transaction does not exist Via: SIP/2.0/UDP 202.180.nnn.nnn:5060;branch=z9hG4bK12646817;rport=5060 From: "6494444444" <sip:6494444444@202.180.nnn.nnn>;tag=as3f0f7d93 To: <sip:6499777777@domain.co.nz>;tag=as060f43a9 Call-ID: 2f573abd3cd80bd369495e322ec5ab4a(a)202.180.nnn.nnn CSeq: 103 BYE User-Agent: Asterisk PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY Content-Length: 0 Thanks Cameron