Abstract: The present invention relates to an optical line terminal capable of communicating with a plurality of optical network units. The optical line terminal includes an obtaining unit that performs an obtaining process that obtains configuration information for each of the optical network units from another apparatus; and a configuring unit that performs a configuration process that transmits a part or all of the configuration information obtained by the obtaining unit to the each of the optical network units. The obtaining unit performs the obtaining process for each of the optical network units in an order determined according to a priority of the each of the optical network units.

Abstract: An optical signal repeater, an optical communication system, and a method of repeating an optical signal capable of decreasing a difference in transmission time period due to a difference in transmission distance of an optical signal between an optical line terminal and a plurality of optical network units connected through branched communication paths are provided. An optical signal repeat is an optical signal repeater for repeating an optical signal transmitted between an optical line terminal and a plurality of optical network units connected through branched communication paths. The optical signal repeater includes a delay element. The delay element is provided between the ONU connected to the OLT through a shortest communication path among the branched communication paths and the OLT and delays transmission of the optical signal transmitted through the shortest communication path.

Abstract: The present invention relates to an optical line terminal capable of communicating with a plurality of optical network units. The optical line terminal includes an obtaining unit that performs an obtaining process that obtains configuration information for each of the optical network units from another apparatus; and a configuring unit that performs a configuration process that transmits a part or all of the configuration information obtained by the obtaining unit to the each of the optical network units. The obtaining unit performs the obtaining process for each of the optical network units in an order determined according to a priority of the each of the optical network units.