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 8 a=rtpmap:8 PCMA/8000 a=ptime:50 ]]> ;tag=[pid]SIPpTag01[call_number] To: ;tag=[$3] [last_Call-ID:] [routes] CSeq: [cseq] INVITE Contact: Max-Forwards: 70 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 8 a=rtpmap:8 PCMA/8000 a=ptime:50 ]]> ;tag=[pid]SIPpTag01[call_number] To: ;tag=[$3] [last_Call-ID:] [routes] CSeq: [cseq] ACK Contact: Max-Forwards: 70 Content-Length: 0 ]]> Content-Length: [len] ]]>