SIP/2.0 200 OK
Via: SIP/2.0/UDP nm;branch=foo;received=224.190.86.94;rport=26810
From: <sip:nm@nm>;tag=root
To: <sip:nm2@nm2>;tag=as603c65fc
Call-ID: 50000
CSeq: 42 OPTIONS
Server: UserAgent
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH,UPDATE
Supported: replaces, timer
Contact: <sip:58.16.116.186:5060;transport=UDP>
Accept: application/sdp
Content-Length: 0
