| 摘要 |
<p>The system provides for the control and management of a large number of dispensing machines through the use of digital mobile telephone control channels, without having to use voice channels. Each dispensing machine has a controller which collects all data sent by sensors, such as the impedance of certain circuits, vibration, temperature and the like. Then the data is sent by means of a wireless digital modem through the control channels to a host computer which processes and stores the data. The host computer can also control certain operation characteristics of each dispensing machine such as reset, disablement and the like. The use of the control channels in order to send messages results in cost saving with respect to the use of voice channels.</p> |
