5031NV dmzplus mode affects voice service
I have newly installed U-verse service with a 5031NV modem. When DMZplus mode is enabled on the 5031NV to open the firewall for my DIR-655 router (or any other device), I am experiencing a problem with my voice service. The problem is that when I make an outgoing voice call, the party I am calling can hear me, but I never hear the phone ringing, nor do I hear anything when the party I am calling answers. Incoming calls to my phone line are fine. I am able to "fix" the problem by disabling DMZplus, but the same problem occurs everytime I turn it back on for any device.
I have contacted Uverse 2nd tier tech support with this problem. They have confirmed that the settings I am using on the 5031NV should not be cause any issues, but they are unable to explain or resolve the problem.
Has anyone else experienced this?