Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, REFER, PRACK, INFO, MESSAGE, SUBSCRIBE, NOTIFY, UPDATE Supported: 100rel, timer, precondition, path, replaces Require: 100rel RSeq: 1 Content-Length: 0 ]]> Content-Type: application/sdp Content-Length: 0 ]]> Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, REFER, PRACK, INFO, MESSAGE, SUBSCRIBE, NOTIFY, UPDATE Supported: 100rel, timer, precondition, path, replaces Require: 100rel RSeq: 2 Content-Length: 0 ]]> Content-Type: application/sdp Content-Length: 0 ]]> Max-Forwards: 70 Content-Type: application/sdp Content-Length: [len] ]]> Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, REFER, PRACK, INFO, MESSAGE, SUBSCRIBE, NOTIFY, UPDATE Supported: 100rel, timer, precondition, path, replaces Require: 100rel RSeq: 46454654 Content-Length: 0 ]]> Content-Type: application/sdp Content-Length: 0 ]]> Content-Type: application/sdp Content-Length: [len] v=0 o=user1 53655765 2353687637 IN IP[local_ip_type] [local_ip] s=- c=IN IP[media_ip_type] [media_ip] t=0 0 m=audio [media_port] RTP/AVP 0 a=rtpmap:0 PCMU/8000 ]]> Content-Length: 0 ]]>