said by TBSupport1:To answer your PM, those are the ports that you need to open up.
Please try unhooking the device from your house wiring and try with a corded phone directly to the device.
If there is any interference in your home wiring, this could cause your device to have issues.
it's more serious than that. if the user failed to disconnect his house wiring from the POTS line at his/her NID, the ATA could be fried from any voltage anomalies on the POTS network.