Pay phone call control apparatus for allowing calls using pre-pa

Details Pay phone call control apparatus for allowing calls using pre-pa Pay phone call control apparatus for allowing calls using pre-pa

1995-02-16

1996-10-08

Chin, Stephen

Telephonic communications

With check operated control

Other than coin

379111, 379112, 379113, 379114, 379115, 379126, 379127, 379143, 235375, 235376, 235380, 235382, H04M 1500, H04M 1700, G06F 1700, G06K 500

Patent

active

055639348

ABSTRACT:
A call control apparatus for a pay phone includes a reading unit, a calculating unit, and a call enable unit. The reading unit reads out value information of an inserted card. The calculating unit calculates a call time corresponding to a ratio of the value information to a unit call fee when the value information read out by the reading unit does not reach the unit call fee. The call enable unit allows a call service by the call time calculated by the calculating unit.

REFERENCES:
patent: 4326123 (1982-04-01), Hosterman
patent: 4706275 (1987-11-01), Kamil
patent: 4757186 (1988-07-01), Heberle
patent: 4879744 (1989-11-01), Tasaki et al.
patent: 4907257 (1990-03-01), Asano et al.
patent: 5068891 (1991-11-01), Marshall
patent: 5138650 (1992-08-01), Stahl et al.
patent: 5266782 (1993-11-01), Alanara et al.

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