| 摘要 |
The present invention is composed of a mainframe 2 having a holder portion 2 a for detachably holding an optical plug provided on an optical fiber end portion. An input/output board 6 is disposed on the lower side of the mainframe 2 , and on the lower face of the input/output board 6 , there is provided an electrode portion enabling electric connection by contact pressure. On the lower side of the mainframe 2 , there are provided support portions 12, 13 and a peripheral portion 9 protruding downward from the lower face of the input/output board 6 , and with use of a screw hole 7 provided on the side of the holder portion 2 a of the mainframe 2 , the mainframe 2 is fixed to a mounting board 21 with a screw 31.
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