I'm using freephoneline.ca in Canada and so far it's working fairly well. 100% success on outbound calls but when people call us, about 2 out of 3 times we can hear them - but they can't hear us. (If they call back, they can typically hear us on the 3rd attempt.)
I spoke to tech support at freephoneline.ca and they suggested I set-up port forwarding on my router - and that that should solve everything. (forward to 5060-6061 and 10000-20000). I successfully set-up port-forwarding on the router - but it has also been advised that I should set a static IP address on the ATA.
I set-up the static IP on the ATA (see attached screenshot) and I see it in my router. However, the phone light indicator on the ATA is off and no dial tone... I tried setting the static IP without using port forwarding and I get the same result.
So, when I have DHCP turned on, my phone works - but those calling us have a challenge hearing us 2 out of 3 times. When I turn DHCP off and set a static IP address, the phone doesn't work at all.
I'm clearly missing some crucial step in the set-up - perhaps on the router - but perhaps in the ATA.
Any direction would be greatly appreciated.