Inventor
TOUMA EISAKU
JP8 patents
Patents
8 patentsUS6108112AAug 22, 2000
Method and apparatus for failure recovery in passive optical network
FUJITSU LTD124 citations96
US6288809B1Sep 11, 2001
Optical subscriber network system
FUJITSU LTD43 citations92
US6288806B1Sep 11, 2001
Optical subscriber network system and fault supervising method for optical subscriber network system
FUJITSU LTD43 citations92
US7099595B2Aug 29, 2006
Optical wavelength multiplexing transmission apparatus and optical output control method for optical wavelength multiplexing transmission apparatus
FUJITSU LTD17 citations91
US6819875B2Nov 16, 2004
Optical wavelength multiplexing transmission apparatus and optical output control method for optical wavelength multiplexing transmission apparatus
FUJITSU LTD27 citations91
US7952994B2May 31, 2011
Redundancy method and switch apparatus
FUJITSU LTD0 citations50
US7206512B2Apr 17, 2007
Method of controlling optical wavelength division multiplexing transmission apparatus
FUJITSU LTD1 citations48
US7283742B2Oct 16, 2007
Optical signal judging system and optical signal judging method
FUJITSU LTD0 citations40