作者: Mukai Hiroaki , Sugimura Hiroshi , Yaei Kaori
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摘要: PROBLEM TO BE SOLVED: To provide a PON system capable of reducing power consumption.SOLUTION: An ONU 10-1 includes an optical transmitter 141, receiver 142 which receives signal including down control signal, and section 11 selectively performs first in transition from normal state to power-saving where the 141 are is controlled based upon startup controlled, or second operation controlled. OLT 1 generates transmits generated 10-1.