SIP/2.0 404 Not Found Via: SIP/2.0/UDP nm;branch=foo;rport=45238;received=*.*.*.* From: <sip:nm@nm>;tag=root To: <sip:nm2@nm2>;tag=5F42D32199455E9A Call-ID: 50000 CSeq: 42 OPTIONS User-Agent: FRITZ!OS Content-Length: 0

SIP/2.0 401 Unauthorized Via: SIP/2.0/UDP nm;rport=43267;received=*.*.*.*;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="1614802714/cfb78912cdb31c6509edeac07eb41b37",opaque="04168f7651591c6e",algorithm=md5,qop="auth" Server: wwcommunicator Content-Length: 0

SIP/2.0 200 OK Via: SIP/2.0/UDP nm;branch=foo;received=*.*.*.*;rport=53566 From: <sip:nm@nm>;tag=root To: <sip:nm2@nm2>;tag=as781a40f7 Call-ID: 50000 CSeq: 42 OPTIONS Server: STARFACE PBX Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH, MESSAGE Supported: replaces, timer Contact: <sip:87.128.112.63:5060> Accept: application/sdp Content-Length: 0

OPTIONS sip:nm SIP/2.0 Via: SIP/2.0/UDP nm;branch=foo;rport From: <sip:nm@nm>;tag=root To: <sip:nm2@nm2> Call-ID: 50000 CSeq: 42 OPTIONS Max-Forwards: 70 Content-Length: 0 Contact: <sip:nm@nm> Accept: application/sdp

OPTIONS sip:nm SIP/2.0 Via: SIP/2.0/UDP nm;branch=foo;rport From: <sip:nm@nm>;tag=root To: <sip:nm2@nm2> Call-ID: 50000 CSeq: 42 OPTIONS Max-Forwards: 70 Content-Length: 0 Contact: <sip:nm@nm> Accept: application/sdp

OPTIONS sip:nm SIP/2.0 Via: SIP/2.0/UDP nm;branch=foo;rport From: <sip:nm@nm>;tag=root To: <sip:nm2@nm2> Call-ID: 50000 CSeq: 42 OPTIONS Max-Forwards: 70 Content-Length: 0 Contact: <sip:nm@nm> Accept: application/sdp

OPTIONS sip:nm SIP/2.0 Via: SIP/2.0/UDP nm;branch=foo;rport From: <sip:nm@nm>;tag=root To: <sip:nm2@nm2> Call-ID: 50000 CSeq: 42 OPTIONS Max-Forwards: 70 Content-Length: 0 Contact: <sip:nm@nm> Accept: application/sdp

SIP/2.0 404 Not Found Via: SIP/2.0/UDP nm;branch=foo;rport=34591;received=*.*.*.* From: <sip:nm@nm>;tag=root To: <sip:nm2@nm2>;tag=209F20ADED0B7EF9 Call-ID: 50000 CSeq: 42 OPTIONS User-Agent: FRITZ!OS Content-Length: 0

SIP/2.0 200 OK Via: SIP/2.0/UDP nm;rport=50870;received=*.*.*.*;branch=foo Call-ID: 50000 From: <sip:nm@nm>;tag=root To: <sip:nm2@nm2>;tag=foo CSeq: 42 OPTIONS Allow: PRACK, INVITE, ACK, BYE, CANCEL, UPDATE, SUBSCRIBE, NOTIFY, REFER, OPTIONS Accept: application/sdp, application/simple-message-summary, message/sipfrag;version=2.0 Supported: replaces, 100rel, timer, norefersub Allow-Events: message-summary, refer User-Agent: TP-Link SIP Stack V1.0.0 Content-Type: application/sdp Content-Length: 327 v=0 o=- 3823791449 3823791449 IN IP4 79.30.48.98 s=pjmedia c=IN IP4 79.30.48.98 t=0 0 m=audio 53456 RTP/AVP 9 18 2 110 8 0 a=rtcp:53457 IN IP4 79.30.48.98 a=rtpmap:9 G722/16000 a=rtpmap:18 G729/8000 a=rtpmap:2 G726-32/8000 a=rtpmap:110 G726-32/8000 a=rtpmap:8 PCMA/8000 a=rtpmap:0 PCMU/8000 a=sendrecv a=ptime:0

SIP/2.0 401 Unauthorized Via: SIP/2.0/UDP nm;rport=37031;received=*.*.*.*;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="1614802649/ed222e3d76bec55b721bb46c15d34a85",opaque="24c4cfbd43bc47ed",algorithm=md5,qop="auth" Server: wwcommunicator Content-Length: 0