<-- SIP read from 69.4.36.4:5060: 
INVITE sip:12164031924@tdm-1 SIP/2.0
Via: SIP/2.0/UDP 69.4.36.4;branch=z9hG4bKac911822510
Max-Forwards: 70
From: "4408354810" <sip:4408354810@tdm-1>;tag=1c911755148
To: <sip:12164031924@tdm-1>
Call-ID: 9117549118120002449@69.4.36.4
CSeq: 2 INVITE
Proxy-Authorization: Digest username="richeybarrett",realm="asterisk",nonce="7b942d8d",uri="sip:12164031924@tdm-1",algorithm=MD5,response="b511d9d9325c34a9373bf0c323981218"
Contact: <sip:richeybarrett@69.4.36.4>
Supported: em,100rel,timer,replaces,path,early-session,resource-priority
Allow: REGISTER,OPTIONS,INVITE,ACK,CANCEL,BYE,NOTIFY,PRACK,REFER,INFO,SUBSCRIBE,UPDATE
User-Agent: Audiocodes-Sip-Gateway-MP-124 FXS/v.5.00A.033.001
Content-Type: application/sdp
Content-Disposition: session
Content-Length: 331

v=0
o=AudiocodesGW 911745128 911745048 IN IP4 69.4.36.4
s=Phone-Call
c=IN IP4 69.4.36.4
t=0 0
m=audio 6050 RTP/AVP 18 23 0 101
a=rtpmap:18 G729/8000
a=fmtp:18 annexb=no
a=rtpmap:23 G726-16/8000
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15
a=ptime:20
a=sendrecv
a=rtcp:6051 IN IP4 69.4.36.4