SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP nm;branch=foo;received=224.80.39.236;rport=26810
From: <sip:nm@nm>;tag=root
To: <sip:nm2@nm2>;tag=as04b8b870
Call-ID: 50000
CSeq: 42 OPTIONS
Server: asterisk
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE
Supported: replaces, timer
WWW-Authenticate: Digest algorithm=MD5, realm="callromania.ro", nonce="2dc486b5"
Content-Length: 0
