H - Electricity – 04 – M
Patent
H - Electricity
04
M
379/2, 379/74
H04M 17/02 (2006.01)
Patent
CA 1222332
- 1 - Abstract: A microcomputer controller coin telephone set prevents coin call fraud and also checks the operational readiness of the telephone set to prevent the acceptance of coins into a hopper for later collection by a coin box unless or until the set is fully functional. Capable of being interrogated remotely, a local memory is used for storing coin deposit information and generating coin deposit signals in order of deposit to a central office. In those instances where the line power drops below that necessary for full operation as a coin telephone, low power sensing circuits convert the telephone to the POTS mode which allows speech and dialing capabilities. Similarly, any type of chute failure, or a full hopper causes the telephone to revert to the POTS mode. While in the POTS mode, any coins deposited in the telephone are returned to the customer.
468929
Crouch Paul E.
Nahas Joseph J.
Ng Howard
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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