| 摘要 |
PROBLEM TO BE SOLVED: To provide a monitoring system capable of calling a terminal device from a center device without interposing a demanding person at a system centralize-monitoring information from plural terminal devices by the center device. SOLUTION: This system connects the center device 1 and the plural terminal devices 10 through a cable communication line 3 to centralize-monitor various kinds of sensor information connected to the respective terminal devices 10 by the device 1. In this case, a pager receiver 12 connected to the devices 10 through a radio communication line is provided and by calling the receiver 12, a necessary device 10 is started from the device 1 to collect monitoring information. |
