Universal' apartment stations shall be Alpha Communications® model IS543 or approved equal, equipped with momentary action push-buttons for TALK, LISTEN, and DOOR operation. Each push-button shall have both English and Universal Graphic Symbol imprinting, as well as Braille lettering. The mylar cone speaker/microphone shall be a 2.5" high sensitivity type with voice-frequency response. Screw terminal connections shall be provided for positive wiring termination, and the patented* design shall allow for connection to popular 5-wire, 4-wire or 3-wire intercom system configurations. The station shall be molded of high-impact, flame retardant ABS plastic, in a white finish.
The IS543 shall be supplied with 2 vertical and 2 horizontal mounting holes, to allow surface mounting over a single-gang electrical box or mounting ring, or over the popular IH101 and/or IH102 flush housing(s). Four (4) mounting hole plugs shall be provided for covering the four (4) mounting holes and two (2) mounting screws (provided).
Contractor shall observe all local and national electrical and building codes.