Retransmitting #4 (NAT) to 147.135.12.128:5060:
OPTIONS sip:sip.broadvoice.com SIP/2.0
Via: SIP/2.0/UDP 10.0.0.4:5060;branch=z9hG4bK21c880b1;rport
From: "Unknown" <sip:Unknown@10.0.0.4>;tag=as2b021c7a
To: <sip:sip.broadvoice.com>
Contact: <sip:Unknown@10.0.0.4>
Call-ID: 3eee556677cdf4843641b4e16f750fb8@10.0.0.4
CSeq: 102 OPTIONS
User-Agent: Asterisk PBX
Max-Forwards: 70
Date: Thu, 10 Aug 2006 04:48:20 GMT
Allow: INVITE, ACK, CANCEL, OPTIONS, BYE, REFER, SUBSCRIBE, NOTIFY
Content-Length: 0