I have newly set up this system, and I've made a few test calls, but today I'm getting an error message, "Unable to detect public IP" .There may be a simple answer, because Axon did register with my voip provider for a fer minutes, then I got "stun server failed messages".
So perhaps these stun servers will be restored. Can I substitute other stun servers instead to work around this?
My fear is that this is a NAT router issue. When I run the network setup wizard in axon, I get a warning that I will have a poor connection because I'm behind a symmetric NAT router. For my few test calls, it didn't seem to be a problem, but if the stun servers don't work and I can't use uPNP, I guess I need to explore this.
I have a DLink DI-724GU router, and I've opened the ports for axon: UDP 5060, 5070,8000-8020, 3478 for the stun servers, and 16384-16482 for my IP phone. I thought the router would be a good buy because it has QoS to prioritize voip packets, so it's designed to work with SIP trunks, right?
I've read a little about port forwarding and creating a static IP address, but I don't know whether to explore those configurations. Is this what I need to do to have an "always on" registration with my sip provider?
Thanks for your help!