Method and apparatus for preventing pay telephone fraud and...

Details Method and apparatus for preventing pay telephone fraud and... Method and apparatus for preventing pay telephone fraud and...

H - Electricity

04

M

379/74

H04M 17/02 (2006.01) H04M 1/67 (2006.01)

Patent

CA 2040407

A method and apparatus for the detection and prevention of pin fraud in a coin operated telephone (2) is disclosed. A circuit (55) detects loss of loop current and triggers the opening of a pair of switches (S1,S2) thereby disconnecting the microphone from the phone. The A-relay is also switched to its refund and collect position. As a result, the fraud path through the microphone is disconnected, and the central office (4) can perform all its control functions unimpaired. Thus, the incentives for perpetrating the fraud are eliminated.

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