[xtowers]

I have just tried to configure a Sipura SPA-2000 with BroadVoice, with the ATA on a network behind an IX66 PF ("Lo" firewall setting and pretty standard SIP configuration), using the BYOD route with the Voxilla wizard. After repeatedly getting "Failed" registration errors on the SPA-2000, I swapped out the IX66 for a Verizon-provided D-Link DI-604 broadband router on a hunch, and sure enough the SPA-2000 registered successfully (I still have problems with international calls connecting sporadically and a messed-up FWD configuration on Line 2, but that's a separate matter).

Any tips on where and how to start debugging? Should I post on the BroadVoice forum and/or take this to the IX66 Techarena?

[mberlant]

Since the IX66 is a SIP-aware router you should set your SPA-2000 to believe that it is connected directly to the public internet. On the SIP page, set Enable STUN to "no" and on the two Line pages set NAT enable and NAT Keep Alive to "no".

That should tell your SPA to leave all of this in the IX66's hands.

[xtowers]

Thanks for the tip - I just did all these (the STUN settings were already at "No" by Sipura default I think), and for good measure powered both SPA-2000 and IX66 off and back on afterwards, to no avail...

Interestingly enough the new settings seem to do no harm even with the DI-604. I guess the BroadVoice and FWD configurations which appear to use outbound proxies are robust enough without the NAT settings.