Configuring Advanced Features525Example of a SIP INFO message:Via: SIP/2.0/UDP 10.3.20.14:5060;branch=z9hG4bK1870385345From: "1009" ;tag=1385842459To: ;tag=2383911905Call-ID: 0_1289812066@10.3.20.14CSeq: 2 INFOContact: p:1009@10.3.20.14:5060>Max-Forwards: 70User-Agent: Yealink T58 58.80.0.5Record: onContent-Length: 0When the user taps the record key for the second time, the IP phone sends a SIP INFO messageto the server with the specific header “Record: off”, and then the recording stops.Example of a SIP INFO message:Via: SIP/2.0/UDP 10.3.20.14:5060;branch=z9hG4bK175716007From: "1009" ;tag=1385842459To: ;tag=2383911905Call-ID: 0_1289812066@10.3.20.14CSeq: 3 INFOContact: Max-Forwards: 70User-Agent: Yealink T58 58.80.0.5Record: offContent-Length: 0URL RecordWhen a user taps a URL record key for the first time during a call, the IP phone sends an HTTPGET message to the server.Example of an HTTP GET message:GET /URLRecord/record.xml HTTP/1.1\r\nRequest Method: GETRequest URI: /URLRecord/record.xmlRequest version: HTTP/1.1Host: 10.3.5.97:8080\r\nUser-agent: Yealink T58 58.80.0.5 00:15:65:74:B1:50\r\nIf the recording is successfully started, the server will respond with a 200 OK message.Example of a 200 OK message: