Quote:
Originally Posted by boatman
Initially I was was puzzled that your ATA could not be contacted just because a STUN server failed. Then I thought maybe you don't have "Handle VIA received" and "Handle VIA rport" set yes. When STUN is not available there is another way the ATA can learn it's public IP address and public SIP port number. It uses "Handle VIA received" and "Handle VIA rport".
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I had simply followed the instructions shown under Voxalot FAQ for setting up SPA3102, the only exception being the NAT_Keep_Alive_Intvl:15
Since the devices kept working properly, I never bothered changing whatsoever to their settings.
They used to be and still are behind their own built in NAT routers. Never had any problem, so there was no need to do any SIP port forwarding.
Thanks for your advices, I might need them in the future.