The IR103E, IR104E and IR105E 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 flush 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 IR103E station; 3 common and 1 selective wires for the IR104E station; and 4 common and 1 selective wires for the IR105E station. Connections are screw terminals. A wide variety of optional accessories is available to provide additional functions, such as multiple entrance operation and post office door release.