SIP/2.0 401 Unauthorized
Via: SIP/2.0/UDP nm;rport=26810;received=172.20.69.60;branch=foo
Call-ID: 50000
From: <sip:nm@nm>;tag=root
To: <sip:nm2@nm2>;tag=foo
CSeq: 42 OPTIONS
WWW-Authenticate: Digest realm="asterisk",nonce="1725079862/de6205ad99209f06f0abbba0ed3bfabd",opaque="0a52af6d6a733d65",algorithm=MD5,qop="auth"
Server: Wazo PBX
Content-Length: 0
