| 摘要 |
<p>PROBLEM TO BE SOLVED: To increase the market value of a telephone system for a prepaid card use which settles a communication charge and commercial transaction by using a card such as a prepaid card, by widening its use range without limiting the user place of the card to the public installation place of a specific equipment. SOLUTION: When the prepaid card 12 for telephone is loaded in a card reader provided to a telephone device 20, data on the callable rating magnetically recorded on the card 12 are read out and sent to a center device 30, and the data are added to the card rating of the corresponding telephone user managed by a user database on the center device 30, so that the database is updated. When the telephone charge is settled, the amount obtained by subtracting the amount of the card rating from the current telephone charge is billed and withdrawn from the bank account of the corresponding telephone user.</p> |
