■ Features

• The speech block can operate on line voltage, with no external power supply, and is operational even during a commercial power failure.

• Incorporates auto. PAD, dial mute, DC voltage regulation,

and other basic speech functions.

• The cross-point switch can be operated independently.

• Each output of the cross-point switch can correspond to multiple inputs, allowing three-or four-person communication.

• The REC/PLAY amplifiers incorporate ALC and VOX circuits.

• Receiver volume can be increased by 6 dB or 9 dB.