;tag=[call_number] To: sut Call-ID: [call_id] CSeq: 1 INVITE Contact: sip:sipp@[local_ip]:[local_port] Max-Forwards: 70 Subject: Performance Test Content-Type: application/sdp Content-Length: [len] v=0 o=FreeSWITCH 1575204365 1575204366 IN IP4 1.2.3.4 s=FreeSWITCH c=IN IP4 1.2.3.4 t=0 0 m=audio 27538 RTP/AVP 0 8 ]]> ;tag=[call_number] To: sut Call-ID: [call_id] Cseq: 1 ACK Contact: sip:sipp@[local_ip]:[local_port] Max-Forwards: 70 Content-Length: 0 ]]>