<-- SIP read from 74.62.40.178:5060: 
INVITE sip:600@69.235.92.57 SIP/2.0
Via: SIP/2.0/UDP 192.168.0.15:5060;rport;branch=z9hG4bK4104759339
From: <sip:wifi@69.235.92.57>;tag=1455266441
To: <sip:600@69.235.92.57>
Call-ID: 209328372@192.168.0.15
CSeq: 1000 INVITE
Contact: <sip:wifi@192.168.0.15:5060>
max-forwards: 70
user-agent: UTSTARCOM F1000/Device ID-0007ba251b0d
Content-Type: application/sdp
Content-Length: 298  

v=0
o=wifi 123456 654339 IN IP4 192.168.0.15
s=none
c=IN IP4 192.168.0.15
t=0 0
m=audio 10010 RTP/AVP 0 8 18 96 101
a=ptime:20
a=rtpmap:0 PCMU/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:18 G729A/8000
a=fmtp:18 annexb=no
a=rtpmap:96 G726/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-15

SIP/2.0 100 Trying
Via: SIP/2.0/UDP 192.168.0.15:5060;branch=z9hG4bK4104759339;received=74.62.40.178;rport=5060
From: <sip:wifi@69.235.92.57>;tag=1455266441
To: <sip:600@69.235.92.57>
Call-ID: 209328372@192.168.0.15
CSeq: 1000 INVITE
User-Agent: Asterisk PBX
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
Contact: <sip:600@192.168.0.92>
Content-Length: 0

    -- Executing [1;36;40mPlayback[0;37;40m("[1;35;40mSIP/wifi-0927da80
[0;37;40m", "[1;35;40mdemo-congrats[0;37;40m") in new stack
We're at 192.168.0.92 port 10070
Adding codec 0x4 (ulaw) to SDP
Adding non-codec 0x1 (telephone-event) to SDP

Reliably Transmitting (NAT) to 74.62.40.178:5060:
SIP/2.0 200 OK
Via: SIP/2.0/UDP 192.168.0.15:5060;branch=z9hG4bK4104759339;received=74.62.40.178;rport=5060
From: <sip:wifi@69.235.92.57>;tag=1455266441
To: <sip:600@69.235.92.57>;tag=as16cedbcf
Call-ID: 209328372@192.168.0.15
CSeq: 1000 INVITE
User-Agent: Asterisk PBX
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
Contact: <sip:600@192.168.0.92>
Content-Type: application/sdp
Content-Length: 216

v=0
o=root 14274 14274 IN IP4 192.168.0.92
s=session
c=IN IP4 192.168.0.92
t=0 0
m=audio 10070 RTP/AVP 0 101
a=rtpmap:0 PCMU/8000
a=rtpmap:101 telephone-event/8000
a=fmtp:101 0-16
a=silenceSupp:off - - - -

    -- Playing 'demo-congrats' (language 'en')

<-- SIP read from 74.62.40.178:5060: 
ACK sip:600@192.168.0.92 SIP/2.0
Via: SIP/2.0/UDP 192.168.0.15:5060;rport;branch=z9hG4bK1833579486
From: <sip:wifi@69.235.92.57>;tag=1455266441
To: <sip:600@69.235.92.57>;tag=as16cedbcf
Call-ID: 209328372@192.168.0.15
CSeq: 1000 ACK
max-forwards: 70
user-agent: UTSTARCOM F1000/Device ID-0007ba251b0d
Content-Length: 0