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    • 8. 发明专利
    • AUXILIARY SYSTEM TESTING SYSTEM
    • JPS56122560A
    • 1981-09-26
    • JP2519280
    • 1980-03-03
    • FUJITSU LTDNIPPON TELEGRAPH & TELEPHONEOKI ELECTRIC IND CO LTDNIPPON ELECTRIC COHITACHI LTD
    • FUKUDA HARUKIKOGURE KOUJIAKATA KAZUHIKOMATSUMOTO TAKASHIOBARA SUSUMU
    • H04M3/26H04M3/12
    • PURPOSE:To control both an existing and an auxiliary control devices by one master station, by making one control device communicate with the master station and also testing the other control device by the master station, in two control units connected to the master station through the interface IF equipment. CONSTITUTION:The existing and auxiliary systems between the master station 1 and the IF equipment 2 are connected by the transmission lines 5, 6, respectively, the equipment 2 and both the existing and auxiliary control devices 3, 4 are connected by the IF lines 5', 6' corresponding to the lines 5, 6, respectively, and also the IF line 7 corresponding to the line 6, and the IF line 8 corresponding to the line 5 are connected to the devices 3, 4, respectively. When the normal operation is executed, the master station 1 communicates with the device 3 through the line 5 and the IF line 5', and also the device 4 is tested by the master station through the line 6 and the IF line 6'. When the line 6 is disconnected, the master station 1 utilizes an idle time of communication with the device 3, and tests the device 4 through the line 5, the equipment 2 and the IF line 8 by giving the instruction to the equipment so that the IF line 5' is switched to the auxiliary system IF line 8 connected to the device 4. In case when the line 5 is faulty, as well, the device 3 is controlled by the master station 1 through the line 6, the equipment 2 and the IF line 7.