The DP28C Doorbell Fon Intercom Controller is the Heart of the Doorbell Fon Door intercom system and allows users to answer a door or gate from any telephone in the home or business. Doorbell Fon installs using a single pair of wires for power, signalling, control and voice. Add on Door stations connect to same single pair of wires. Operation is simple !! No Codes, No Programming, Just pick up the telephone like a regular call with DoorBell Fon.
Doorbell Fon is a registered trademark of ACNC