Digital Voice phones | BT Help
www.bt.com › help › landlineWith Digital Voice, it's best to use Essential or Advanced Digital Home Phones, which have been specially designed to use with the service. Digital Voice: Will my service work in a power cut? Your Hub needs power to make calls with Digital Voice. If your area has power cuts, you can buy a battery back-up unit (BBU).
Digital Voice Adapter - BT
www.bt.com › Digital-Voice-Adapter-userguideLet’s set up your Digital Voice Adapter 1 Link the Digital Voice Adapter with your hub For ease of linking, plug your Digital Voice Adapter into a power socket close to where your BT Hub is. (So you can reach both buttons easily). Once its linked, you can then move it to wherever you want your home phone to be.