Public telephone system using a prepaid card to enable communication
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 13, 1996
Grant Date -
N/A
app pub date -
Oct 20, 1994
filing date -
Oct 21, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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