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.
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Electrical Communication, vol. 52, No. 3, 1977, pp. 213-218, D. Adolphs, "NT2000 Coin Telephone Using Microprocessor Techniques".
Crouch Paul E.
Nahas Joseph J.
Ng Howard
AT&T - Technologies, Inc.
AT&T Bell Laboratories
DiVito Elio
Rubinson Gene Z.
Williamson Samuel R.
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