We have a Linksys Pap2t hooked up to a DD-WRT router, which is performing nat, which is in turned hooked up to a Ubiquity radio (from our ISP). I know that the radio is performing NAT aswell, and isn't forwarding any ports by default.
The PAP2t is being provisioned by http://voipzone.co.nz/spaconfig.cfg
The issue we have is that when we receive a call, most times, the first time they call, we can not hear anything (they can hear us fine), however, if they hang up, and call right back, then the call works fine.
This was working fine a while ago when we had a Trango that was in bridging mode instead of the Ubiquity radio doing NAT, we're not 100% sure, but we think that coincides with when the problem started.
I should be able to get some ports opened up on the radio, and the DD-WRT router if I wanted to do port forwarding (if that would help).
What do people suggest I do to test, verify, or help track down this annoying issue.
Cheers