Controller for a coin telephone set

Details Controller for a coin telephone set Controller for a coin telephone set

1983-12-30

1986-01-28

Rubinson, Gene Z.

179 27G, H04M 1700

Patent

active

045673250

ABSTRACT:
A microcomputer controlled 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.

REFERENCES:
patent: 3682286 (1972-08-01), Prumm
patent: 3741363 (1973-06-01), Hinterstocker
patent: 3804984 (1974-04-01), Yachabach
patent: 4039768 (1977-08-01), O'Maley
patent: 4105867 (1978-08-01), Levasseur et al.
patent: 4136262 (1979-01-01), Clark, Jr.
patent: 4196318 (1980-04-01), Nelson
patent: 4352958 (1982-10-01), Davis et al.
Klausen, "Coin Box Telephones", Ericsson Reviews, No. 2, 1983, pp. 73-79.
Post Office Telecommunications Journal, vol. 31, No. 3, Autumn, 1979, pp. 4-6, L. L. Grey, "New Payphones take the Credit".
Electrical Communication, vol. 52, No. 3, 1977, pp. 213-218, D. Adolphs, "NT2000 Coin Telephone Using Microprocessor Techniques".

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