| 摘要 |
PROBLEM TO BE SOLVED: To provide a PHS access device for an vending machine modem, regarding itself as an adaptor for PIAFS(PHS Internet Access Forum Standard) communication and uses voice communication and a transfer function, so as to efficiently collect sales data. SOLUTION: The PHS access device for the vending machine is provided with a modem for regarding itself to be an adaptor for PIAFS communication. A plurality of automatic vending machines are grouped, a maser machine collects sales data from slave machines and the master machine collects the sales data according to a request from a center device and transmits the sales data to the center device. The center device selects voice communication or a transceiver function regarded as the PIAFS communication depending on the center device. The master machine stores latest sales data from the slave machines. The master machine receiving control data from the center device transmits the data to the slave machines, only when the data are changed. Through such a configuration, the PHS access device for the automatic vending machine can be realized, which is compatible with any center device, with high reliability and high efficiency.
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