FIELD: protective devices.
SUBSTANCE: invention relates to devices for protecting against unauthorized listening to conversations in rooms. Said technical result is achieved by the fact that the device further comprises a power supply unit, comprising a charger and a battery, electronic key on a bipolar transistor, as part of the display unit, the sound indication unit is implemented in the form of an electromechanical transducer with the possibility of creating acoustic oscillations, the power supply is connected to the telephone line and its output to the first input of the electronic key on the bipolar transistor, the second input of which is connected to the telephone line, and the output is connected to the inputs of the control unit for detecting control signals in the telephone line and the unit for detecting galvanic connection of unauthorized acoustic control devices located between the telephone state monitoring unit and a control unit for detecting control signals in the telephone line, wherein the output of the galvanic detection unit of the unauthorized acoustic control devices is connected to the input of the indicating unit, the second input of which is connected to the output of the control signal detection unit in the telephone line.
EFFECT: technical result is an increase in the effectiveness of protection of voice information from leakage through technical channels and unauthorized acoustic control.
1 cl, 2 dwg
