| 摘要 |
Billing system via telephone for products contained in vending machines, especially spools of film. This is applicable to vending machines located in hotels where there is a telephone switchboard that records the duration of the calls of each of the rooms; the system is based on the connection between the vending machine 1 and the switchboard 2 with the interposition of signal processing software, which associates a number of telephone units at the switchboard 2 with the code of each type of product selected matching the price of the product and which accumulates in the memory corresponding to the calls made from the user's room, combining with the microprocessor unit 8, a keypad data entry unit 3, a vacuum tube detector unit 4, a display unit 10, an operating mode configuration unit 11, a configuration parameters unit 13 and a vendor control output unit 12. <IMAGE>
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