IP 10.1.0.3.5060 > 10.1.0.111.5060: SIP, length: 592
E..l....@.p#
        ..
        .o.....X..OPTIONS sip:111@10.1.0.111:5060;transport=udp SIP/2.0
Via: SIP/2.0/UDP 10.1.0.3:5060;branch=z9hG4bK276d50c3;rport
Max-Forwards: 70
From: "asterisk" <sip:asterisk@10.1.0.3>;tag=as7e156001
To: <sip:111@10.1.0.111:5060;transport=udp>
Contact: <sip:asterisk@10.1.0.3:5060>
Call-ID: 07d95a2a12b438373c441a227877202f@10.1.0.3:5060
CSeq: 102 OPTIONS
User-Agent: Asterisk PBX 11.7.0-rc1
Date: Wed, 13 Nov 2013 05:16:33 GMT
Session-Expires: 7200
Min-SE: 90
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH
Supported: replaces, timer
Content-Length: 0


IP 10.1.0.111.5060 > 10.1.0.3.5060: SIP, length: 909
E`......@..w
        .o
        ..........SIP/2.0 200 OK
Via: SIP/2.0/UDP 10.1.0.3:5060;branch=z9hG4bK276d50c3;rport
From: "asterisk" <sip:asterisk@10.1.0.3>;tag=as7e156001
To: <sip:111@10.1.0.111:5060;transport=udp>;tag=0013c401da4a2525291558f9-6a2c8580
Call-ID: 07d95a2a12b438373c441a227877202f@10.1.0.3:5060
Date: Wed, 13 Nov 2013 05:22:18 GMT
CSeq: 102 OPTIONS
Server: Cisco-CP7940G/8.0
Allow: ACK,BYE,CANCEL,INVITE,NOTIFY,OPTIONS,REFER,REGISTER,UPDATE
Accept: application/sdp,multipart/mixed,multipart/alternative
Accept-Encoding: identity
Accept-Language: en
Supported: replaces,join,norefersub
Content-Length: 235
Content-Type: application/sdp
Content-Disposition: session;handling=optional

v=0
o=Cisco-SIPUA 27539 0 IN IP4 10.1.0.111
s=SIP Call
t=0 0
m=audio 0 RTP/AVP 0 8 18 101
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15