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2017 OFC(USA), FOE(JAPAN), ECOC(Sweden)
2016 OFC (USA), FOE (JAPAN), Japan CATV (JAPAN), ECOC (Germany)
2015 OFC, FOE, Japan CATV, ECOC, CABLE-TEC EXPO
2014 OFC, FOE, Japan CATV, ECOC, CABLE-TEC EXPO
2013 OFC, FOE, Japan CATV, ECOC, CABLE-TEC EXPO