Method and apparatus for preventing pay telephone fraud and redu

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

1989-09-15

1991-01-29

Schreyer, Stafford D.

Telephonic communications

With check operated control

Fraud or interference prevention

379146, 379155, H04M 1702

Patent

active

049892398

ABSTRACT:
A method and apparatus for the detection and prevention of pin fraud in a coin operated telephone is disclosed. A circuit detects loss of loop current and triggers the opening of a pair of switches 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 can perform all its control functions unimpaired. Thus, the incentives for perpetrating the fraud are eliminated.

REFERENCES:
patent: 3676597 (1972-07-01), Peterson
patent: 4039768 (1977-08-01), O'Maley
patent: 4845742 (1989-07-01), Staggs et al.
patent: 4862494 (1989-08-01), Matheny

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