The IR203E, IR204E, IR205E Apartment Intercom Stations combine modern styling with ease of operation to provide natural, clear voice communication and positive door-release operation. The stations are equipped with momentary-action push buttons for talk, listen and door operation. The attractive flame-retardant ABS plastic faceplates are surface mounted, and blend with any setting. The advanced circuitry and versatility permit use in large or small buildings, with one or several entrances. Wiring is just 2 common and 1 selective wires for the IR203E station; 3 common and 1 selective wires for the IR204E station; and 4 common and 1 selective wires for the IR205E station. Connections are screw terminals.