| 摘要 |
PURPOSE:To enable to effectively use the public telephone through the use of card recording an arbitrary amount of money, by reading in the amount of money recorded on card in advance, operating the current supply circuit, closing the existing public telephone set communication circuit and performing the display of amount of money. CONSTITUTION:When the card is inserted into the card insertion slit 21 and the card is moved internally, the card recording content reard-in and write-in circuit 24 reads in the amount of money. Further, when the money amount is a certain value, the calling circuit 34 and the current supply circuit 35 are operated to close the existing public phone communication circuit 8, and the card charging signal reception circuit 32 is connected to the in-station unit 11. Further, the amount of money information of the card is transferred to the card money amount processing and controlling circuit 33 and the money amount is displayed 26. Thus, by using the card recording an arbitrary amount of money in advance, the public telephone set can effectively by used. |
