{"type":"doc","content":[{"type":"paragraph"},{"type":"heading","attrs":{"level":2},"content":[{"text":"Example Trace","type":"text","marks":[{"type":"strong"}]}]},{"type":"paragraph","content":[{"text":"The following is an example call trace showing SIP Subscribe Notify for DTMF. Related lines have a \"→\" as a prefix.","type":"text"}]},{"type":"paragraph"},{"type":"codeBlock","content":[{"text":"---> [10.129.55.74, 5060]\n SUBSCRIBE sip:8519@10.129.55.80:5060 SIP/2.0\n Via: SIP/2.0/UDP 10.129.55.74:5060\n From: 7340 ;tag=1\n To: 8519 ;tag=a94c095b773be1\n dd6e8d668a785a9c84113d\n Call-id: 1-2104@10.129.55.74\n -> Cseq: 1 SUBSCRIBE\n Contact: \n -> Event: telephone-event;duration=300\n Expires: 600\n Content-Length: 0\n \n18:17:08.733 SIP (W) \n <--- [10.129.55.74, 5060 <- 10.129.55.80, 5060]\n SIP/2.0 200 OK\n Via: SIP/2.0/UDP 10.129.55.74:5060;received=10.129.55.74\n Call-ID: 1-2104@10.129.55.74\n From: 7340 ;tag=1\n To: 8519 ;tag=a94c095b773be1\n dd6e8d668a785a9c84113d\n -> CSeq: 1 SUBSCRIBE\n Server: Cantata-SIP/10.3.3.129 SIP-Gateway1 0\n Expires: 600\n Content-Length: 0\n <--- [10.129.55.74, 5060 <- 10.129.55.80, 5060]\n -> NOTIFY sip:sipp@10.129.55.74:5060 SIP/2.0\n Via: SIP/2.0/UDP 10.129.55.80:5060; rport;branch=z9hG4bK- 5c5e-1163009828-19999-33\n Call-ID: 1-2104@10.129.55.74\n -> CSeq: 1 NOTIFY\n Max-Forwards: 70\n To: ;tag=1\n From: ;tag=a94c095b773be1dd6e8d668a785a9c84113d\n User-Agent: Cantata-SIP/10.3.3.129 SIP-Gateway1 0\n -> Event: telephone-event;duration=300\n Subscription-State: Active;expires=600\n Content-Length: 0\n \n \n18:17:08.753 SIP (W) \n ---> [10.129.55.74, 5060]\n SIP/2.0 200 OK\n Via: SIP/2.0/UDP 10.129.55.80:5060; rport;branch=z9hG4bK- 5c5e-1163009828-19999-33\n From: ;tag=a94c095b773be1dd6e8d668a785a9c84113d\n To: ;tag=1;tag=1\n Call-ID: 1-2104@10.129.55.74\n -> CSeq: 1 NOTIFY\n Contact: \n Content-Length: 0\n \nNOTIFY sip:sipp@10.129.55.74:5060 SIP/2.0\n Via: SIP/2.0/UDP 10.129.55.80:5060; rport;branch=z9hG4bK-d37-1163009863-19998-33\n Call-ID: 1-2104@10.129.55.74\n CSeq: 2 NOTIFY\n Max-Forwards: 70\n To: ;tag=1\n From: ;tag=a94c095b773be1dd6e8d668a785a9c84113d\n User-Agent: Cantata-SIP/10.3.3.129 SIP-Gateway1 0\n -> Event: telephone-event;duration=300\n Subscription-State: Active;expires=125\n Content-Type: application/ dtmf-relay\n Content-Length: 26\n Signal= #\n Duration= 160\n \n18:17:43.893 SIP (W) \n ---> [10.129.55.74, 5060]\n SIP/2.0 200 OK\n Via: SIP/2.0/UDP 10.129.55.80:5060;rport;branch=z9hG4bK-d37-1163009863-19998-33\n From: ;tag=a94c095b773be1dd6e8d668a785a9c84113d\n To: ;tag=1;tag=1\n Call-ID: 1-2104@10.129.55.74\n -> CSeq: 2 NOTIFY\n Contact: \n Content-Length: 0","type":"text"}]}],"version":1}

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