SIP/2.0 200 OK
   Via: SIP/2.0/TCP PRIVATE-IP:56860;branch=z9hG4bK.Vw7XGF-nC;rport=56860
   From: <sip:address@hidden>;tag=17NnH56NU
   To: <sip:address@hidden>;tag=c8yU76gKtFK9F
   Call-ID: siVp-L3YWG
   CSeq: 21 INVITE
   Contact: <sip:address@hidden:5080;transport=tcp>
   User-Agent: freeswitch
   Accept: application/sdp
   Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER, REFER, NOTIFY, PUBLISH, SUBSCRIBE
   Supported: timer, path, replaces
   Allow-Events: talk, hold, conference, presence, as-feature-event, dialog, line-seize, call-info, sla, include-session-description, presence.winfo, message-summary, refer
   Session-Expires: 1800;refresher=uas
   Content-Type: application/sdp
   Content-Disposition: session
   Content-Length: 771
   
   v=0
   o=diyUa 1431431356 1431431357 IN IP4 PUBLIC-IP
   s=diyUa
   c=IN IP4 PUBLIC-IP
   t=0 0
   a=msid-semantic: WMS Naw97lP7vwaHL55V9ThUZJn9PoWKzIYc
   m=audio 16016 RTP/AVP 96 101
   a=rtpmap:96 opus/48000/2
   a=fmtp:96 useinbandfec=1
   a=rtpmap:101 telephone-event/8000
   a=fmtp:101 0-16
   a=silenceSupp:off - - - -
   a=ptime:20
   a=ssrc:961945179 cname:IlcGwSESeFpPBkBA
   a=ssrc:961945179 msid:Naw97lP7vwaHL55V9ThUZJn9PoWKzIYc a0
   a=ssrc:961945179 mslabel:Naw97lP7vwaHL55V9ThUZJn9PoWKzIYc
   a=ssrc:961945179 label:Naw97lP7vwaHL55V9ThUZJn9PoWKzIYca0
   a=ice-ufrag:4JkUiyUXMGxcfmfO
   a=ice-pwd:xhkUZPC3lSJM3bcXKnISLsGo
   a=candidate:2336253712 1 udp 659136 PUBLIC-IP 16016 typ host generation 0
   a=candidate:2336253712 2 udp 659134 PUBLIC-IP 16017 typ host generation 0