XFINITY Voice is the digital voice service offered by Comcast, for which Comcast offers a self-installation kit so you don’t have to wait for a service technician to come set up your telephone service. Before installing your Voice unit, you must first install your Internet service kit. Once you have installed the entire kit, you can activate your service and start using your digital telephone service. Writer Bio

How to Install a Comcast Digital Voice Unit - 19