electrical wiring, connectors, taps, terminators and splices; electrical receptacle blocks; electrical switches; coaxial cable, connectors and outlets; switch and electrical outlet face plates; distribution interface unit which serves as an intermediate junction point for distribution of signals routed on coaxial cable; continuous power supply for low voltage products such as smoke alarms and security systems; enclosure and mounting hardware for hardware components of system controller electronics module, the central processing unit for the system; electrical circuit box load center; circuit breakers; surge suppressor; telephone gateway, a device for distribution of telephone and communications signals and which permits remote diagnostics of system; and coaxial head end, a device designed to amplify and combine coaxial cable signals from various video and audio inputs, including television, VCR, video camera and audio receiver, at system controller

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