CANCEL [SIP-URI] SIP/2.0
CSeq: 1 CANCEL
Via: SIP/2.0/UDP [OUR-IP]:5067;branch=z9hG4bK3862c2ce-526c-dc11-89e6-000c29da463b;rport
From: "nnp" <sip:nnp@[OUR-IP]>;tag=422ec2cb-526c-dc11-89e6-000c29da463b
Call-ID: 80e1c1cb-526c-dc11-89e6-000c29da463b@ubuntu
To: <[SIP-URI]>
Allow: INVITE,ACK,OPTIONS,BYE,CANCEL,NOTIFY,REFER,MESSAGE
Content-Length: 0
Max-Forwards: 70

