FIELD: telephony. SUBSTANCE: device has the first and the second p-n-p transistors 1 and 2, the first and the second n-p-n transistors 6 and 7, the first to the fourth resistors 3,4,5,8. Base of the first n-p-n transistor 6 is connected to the first output of the fourth resistor 8, which has the second output to be the first input of the device. Two diodes 15 and 16 , and six resistors 9-14 are brought into the device. When base of the second n-p-n transistor 7 is connected to the first output of the fifth resistor 9, the second output of the resistor has to be the second input of the device. The eleventh and the twelfth resistors 17 and 18 are used in the circuit to reduce power, consumed by the device, when user hands handset up. EFFECT: reduced power consumption. 2 cl, 1 dwg
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