Public telephone system using a prepaid card to enable communica

Details Public telephone system using a prepaid card to enable communica Public telephone system using a prepaid card to enable communica

1994-10-20

1996-08-13

Chin, Stephen

Telephonic communications

With usage measurement

Call charge metering or monitoring

379130, 379144, H04M 1500, H04M 1700

Patent

active

055464467

ABSTRACT:
A public telephone system includes a plurality of public telephone sets and a center apparatus. Each of the public telephone sets includes a reading unit for reading card information recorded in a prepaid card upon insertion of the prepaid card and a first transmitting unit for transmitting the card information read by the reading unit to the center apparatus through a telephone line. The center apparatus includes a database for storing the card information of the prepaid card for each issued card, a collating unit for collating the card information stored in the database with the card information from the first transmitting unit upon insertion of the prepaid card into each public telephone set and allowing speech communication using the prepaid card on the basis of a collation result, a keyboard for setting data for designating a valid period of the prepaid card, and a deleting unit for deleting the card information related to the prepaid card which is expired in the database when the data for designating the valid period of the prepaid card is set by the keyboard.

REFERENCES:
patent: 4706275 (1987-11-01), Kamil
patent: 4879744 (1989-11-01), Tasaki et al.
patent: 4975942 (1990-12-01), Zebryk
patent: 5265155 (1993-11-01), Castro
patent: 5359182 (1994-10-01), Schilling

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