| 摘要 |
PROBLEM TO BE SOLVED: To confirm whether it is the abnormality occurrence or power off of each terminal and to make management easy and also sure by notifying the effect to a communication controller and after that turning off power when each terminal turns it off. SOLUTION: A slave station 500 drives a radio unit 302 and transmits notification data of power off to a center station 400 when a power switch 306 is subjected to a switching operation from on to off by the processing operation of a body controlling part 501 according to a control program. When the station 400 receives the power off data, it stores it in a recoding medium of a DAMA controlling part 401 and also transmits receiving notification data to the station 500. The station receives the receiving notification data, confirms it and after that turns off the body power by means of the part 501. Thus, the terminal testing function of the station 400 discriminates whether or not due to the power off in deciding the existence of abnormality of each slave station according to the existence of response data from each slave station to data transmission and can appropriately copes with it. |
