;tag=[call_number]
To[$3]
Call-ID: [call_id]
Cseq: 1 INVITE
Contact: sip:sipp@[local_ip]:[local_port]
Max-Forwards: 70
Content-Type: application/sdp
Content-Length: [len]
v=0
o=- 2 2 IN IP4 192.168.0.15
s=pjmedia
c=IN IP4 192.168.0.15
t=0 0
m=audio 4004 RTP/AVP 0
]]>
;tag=[call_number]
To[$3]
Call-ID: [call_id]
Cseq: 1 INVITE
Contact: sip:sipp@[local_ip]:[local_port]
Max-Forwards: 70
Content-Length: 0
]]>