search for: koodo

...ock all ringing, not just some. I have one origination provider. As far as I can tell the issue is related to the remote user's provider. My sister does not hear ringing when she calls from her Roger's cell phone but she does from her Vonage phone. I hear ringing when calling in from my Koodo cell phone. Some land lines work and others do not. The server is not behind a NAT and neither is the origination provider. There is a firewall but port 5060 is open (UDP and, just in case, TCP) as well as the RTP ports mentioned above. I am not sure where to look next. I assume that there is...