malaugh said:I have the phone service. When they install it, they disconnect the phone company wire, then connect a wire from the cable modem to your internal wiring. They swapped my cable modem for a new model. This means all your phones plug in to the wall just like they did with the phone company. The cable modem runs off your AC power, so if the power goes down you have no phone service. I guess running the cable modem on an uninterruptible Power supply would work. It does not effect your cable modem speed. I am very happy with the service.