Fraud prevention in an electronic coin telephone set

Details Fraud prevention in an electronic coin telephone set Fraud prevention in an electronic coin telephone set

1986-07-07

1987-06-16

Lev, Robert

Telephonic communications

With check operated control

At central office

379147, 379146, 379150, H04M 1700

Patent

active

046741143

ABSTRACT:
In an electronic coin telephone set, a fraud prevention arrangement prevents fraudulent coin tones originating at a telephone transmitter from being provided to a central office over a coin subscriber loop. The arrangement comprises a first and second transmission channel for alternately connecting the transmitter to the central office and also a fraud filter disposed in the second transmission channel. The fraud filter attenuates a selected frequency originating at the transmitter that is indicative of coin deposits. When coin deposits are not required by the central office, the transmitter is connected to the central office through the first transmission channel. When coin deposits are required by the central office, however, the arrangement connects the transmitter to the central office through the second transmission channel thereby avoiding the fraudulent generating of coin tones through the telephone transmitter.

REFERENCES:
patent: 3797628 (1974-03-01), Fougere
patent: 3997726 (1976-12-01), De Crepy
patent: 4031325 (1977-06-01), Dudonis et al.
patent: 4046962 (1977-09-01), Rogers
patent: 4105867 (1978-08-01), Levasseur et al.
patent: 4124111 (1978-11-01), Hayashi
patent: 4197425 (1980-04-01), Secrett et al.
patent: 4208549 (1980-06-01), Polillo et al.
patent: 4243841 (1981-01-01), Young
patent: 4297534 (1981-10-01), Epstein et al.
patent: 4326103 (1982-04-01), Oehrig
patent: 4333557 (1982-07-01), Kozak
patent: 4334684 (1982-07-01), Davies
patent: 4358640 (1982-11-01), Murray
patent: 4436196 (1984-03-01), Crisp et al.
patent: 4469213 (1984-09-01), Nicnolson et al.
patent: 4482787 (1984-11-01), Sagara et al.
patent: 4483431 (1984-11-01), Pratt
patent: 4488116 (1984-12-01), Plesko

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