Anti-fraud device for use with a coin operated telephone...

Details Anti-fraud device for use with a coin operated telephone... Anti-fraud device for use with a coin operated telephone...

H - Electricity

04

M

344/0.5

H04M 1/66 (2006.01) H04M 1/67 (2006.01) H04M 17/02 (2006.01)

Patent

CA 1307333

29 Abstract of the Disclosure An anti-fraud device is mounted internally within a coin-operated telephone to prevent fraudulent calling due to "pin fraud". The device includes circuitry which senses the presence of ground fraud conditions to disconnect the transmitting element from the telephone to prevent the defeat of a coin collect supervisory signal to cause coins temporarily held in the coin hopper to drop into the coin collection box rather than to be returned to the user.

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