Special Features:

Features include, one zone, automatic gain control; pop suppression, override capability, low level input for background music, automatic background music cutoff, electronic key system page port access, built in punch down block, power reversal; power requirements, negative 21.5 to negative 26.0 volts vdc "b" battery, 200 ma.; environmental temperature, 0 to 50 degrees c; humidiy, 0 to 85 percent non-precipitating

Properties:

An item which provides facilities for connecting to two or more telephone stations, but does not provide facilities to interconnect these two or more telephone stations. May include visual and/or audible signaling facilities. See also intercommunication station.