A call from a door station can only be answered by a master station. SPECIFICATIONS: Power Source: 12V DC at master. Use one PS-1225UL per system, or one PS-1225UL per BG-10C when All Call is included. Communication Output: 800mW at 20 ohms (receive); 500mW at 20 ohms (transmit) Communication: Push-to-talk, release-to-listen (TALK button), or VOX handset at master. Hands free at sub station. Calling: Master to sub or other master: By voice (TALK) or tone (TALK & ALL CALL simult.) Sub to master:

Wiring Method: · Run intercom cables at least 20" away from all AC wiring, fluorescent lights, dimmer switches, and other electrical or electronic devices. Wiring can cross AC wires at 90 degrees. · Sub stations may be homerun to the nearest master station, or daisy-chained. If daisy-chained, include 2 common wires plus one individual wire per station on the run. · In a SINGLE MASTER SYSTEM ONLY: Subs can be wired with 2 conductors homerun. Jumpers between "E" and "-" must be attached on all sub

Multiple masters can be used, along with a large variety of sub station models to create a communication system tailored to the user's needs. Master stations are available in 20-and 40-station sizes, with or without a handset. For greater capacity, include a 20-or 40-station add-on selector. Any "LE-" or "LS-" series sub station can be used. All Call and/or Background Music are optional features requiring additional equipment (BG-10C, PS-1225UL). NAMES & FEATURES LAF-20CA (pictured) NAMES & FUNC

Y, P1, P2, P3 terminals used only if All Call Adaptors are included. WIRING NOTE: The following sub stations are wired as shown above: · LE-A, LE-AN · LE-B, LE-BN · LE-D, LE-DA Remove E/-jumpers SA1 SA1 SA-1 for optional surge protection (See note #3.) SA1 All "E" terminals are common internally. RY-AC Red Blk Wht Yellow To external signalling device and power (E.g. Station #19 will actvate ext. device when it calls in to master.) RY-AC for external signalling when sub calls Pg. 3 WIRING DIAGRAM