SIP/2.0 200 OK
Via: SIP/2.0/UDP nm;branch=foo;rport=26810;received=224.236.114.191
From: <sip:nm@nm>;tag=root
To: <sip:nm2@nm2>;tag=1830201750
Call-ID: 50000
CSeq: 42 OPTIONS
Allow: INVITE, ACK, OPTIONS, PRACK, NOTIFY, BYE, CANCEL, REGISTER, INFO, UPDATE, MESSAGE, REFER
User-Agent: Sphairon-SL5501-4.38.2.06.03
Supported: 100rel
Content-Length: 0
