asterisk users - May 2007 - Remote extensions not working on provider's wireless Internet connection

Hi,

My SIP phones which are working fine at all other remote locations, when
placed in a location connected to the Internet through Rogers Wireless
Internet, they don't work. They do get registered on low port numbers, like
1111, 1123, 1231 etc. but can't dial out or receive calls. Asterisk CLI show
no activity for them. Its the same for ATAs and IP phones. I've tried all
the settings, played aroung with NAT, but to no avail. Can't make them
register on higher port numbers. Same devices work fine if connected
anywhere else.

What could be the reason and how to solve it?

-- 
Zeeshan A Zakaria
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I've solved this problem. It was very easy (only if I knew how to do it
before). I changed the UDP ports, i.e.

1. In sip.conf, bindport=5070
2. In my IP Phone server settings, www.myserver.com:5070

Now it seems to be working good and I hope there'll be no more problem with
it.
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