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Unread 06-01-2007, 02:19 PM   #2
advant
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I wanted to include the following transcript for
clarity:

INVITE sip:nnnnnn@xx.xx.xx.225:5061;user=phone SIP/2.0
Record-Route: <sip:64.34.173.199;lr=on;ftag=as50965e53>
Record-Route: <sip:64.34.163.35;lr=on;ftag=as50965e53>
Record-Route: <sip:64.34.162.221;lr=on;ftag=as50965e53>
Via: SIP/2.0/UDP 64.34.173.199;branch=z9hG4bKe781.6fde1fe6.0
Via: SIP/2.0/UDP 64.34.163.35;branch=z9hG4bKe781.30329f5.0
Via: SIP/2.0/UDP 64.34.162.221;branch=z9hG4bKe781.07a4ffb.0
Via: SIP/2.0/UDP 204.11.194.10:5070;branch=z9hG4bK2bfde41f;rport=50 70

Please note the Via: field only contains an IP address 64.34.173.199
and not 64.34.173.199:4060. It is SIP convention to use 5060 as a
default port if no port number is specified. As a result, the replies(ACK)
go to 64.34.173.199:5060 which is blocked by the ISP.

Is it possible to do someting about this? Please let me know.

Thanks.
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