Reliably Transmitting (NAT) to 147.135.20.221:5060:
INVITE sip:4132791401@147.135.20.221 SIP/2.0
Via: SIP/2.0/UDP 24.181.235.14:5060;branch=z9hG4bK4efc43a0;rport
Max-Forwards: 70
From: "James" <sip:4137711403@sip.broadvoice.com>;tag=as7dbd9bd4
To: <sip:4132791401@147.135.20.221>
Contact: <sip:4137711403@24.181.235.14:5060>
Call-ID: 463e37f470d2b7b90f60a2130b894577@sip.broadvoice.com
CSeq: 102 INVITE
User-Agent: Asterisk PBX SVN-trunk-r277945
Date: Tue, 20 Jul 2010 08:47:46 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY, INFO, PUBLISH
Supported: replaces, timer
Content-Type: application/sdp
Content-Length: 430

v=0
o=root 1592068689 1592068689 IN IP4 24.181.235.14
s=Asterisk PBX SVN-trunk-r277945
c=IN IP4 24.181.235.14
t=0 0
m=audio 18958 RTP/AVP 0 3 8 112 5 10 7 111 9 118
a=rtpmap:0 PCMU/8000
a=rtpmap:3 GSM/8000
a=rtpmap:8 PCMA/8000
a=rtpmap:112 AAL2-G726-32/8000
a=rtpmap:5 DVI4/8000
a=rtpmap:10 L16/8000
a=rtpmap:7 LPC/8000
a=rtpmap:111 G726-32/8000
a=rtpmap:9 G722/8000
a=rtpmap:118 L16/16000
a=ptime:20
a=sendrecv

---
    -- Called broadvoice/4132791401

<--- SIP read from UDP:147.135.20.221:5060 --->
SIP/2.0 100 Trying
Call-ID: 463e37f470d2b7b90f60a2130b894577@sip.broadvoice.com
CSeq: 102 INVITE
From: "James" <sip:4137711403@sip.broadvoice.com>;tag=as7dbd9bd4
To: <sip:4132791401@147.135.20.221>
Via: SIP/2.0/UDP 24.181.235.14:5060;branch=z9hG4bK4efc43a0
Content-Length: 0

<------------->
--- (7 headers 0 lines) ---

<--- SIP read from UDP:147.135.20.221:5060 --->
SIP/2.0 403 Forbidden
Call-ID: 463e37f470d2b7b90f60a2130b894577@sip.broadvoice.com
CSeq: 102 INVITE
From: "James" <sip:4137711403@sip.broadvoice.com>;tag=as7dbd9bd4
To: <sip:4132791401@147.135.20.221>;tag=vxyz
Via: SIP/2.0/UDP 24.181.235.14:5060;branch=z9hG4bK4efc43a0
Content-Length: 0

<------------->
--- (7 headers 0 lines) ---
Transmitting (NAT) to 147.135.20.221:5060:
ACK sip:4132791401@147.135.20.221 SIP/2.0
Via: SIP/2.0/UDP 24.181.235.14:5060;branch=z9hG4bK4efc43a0;rport
Max-Forwards: 70
From: "James" <sip:4137711403@sip.broadvoice.com>;tag=as7dbd9bd4
To: <sip:4132791401@147.135.20.221>;tag=vxyz
Contact: <sip:4137711403@24.181.235.14:5060>
Call-ID: 463e37f470d2b7b90f60a2130b894577@sip.broadvoice.com
CSeq: 102 ACK
User-Agent: Asterisk PBX SVN-trunk-r277945
Content-Length: 0