Optical signal repeater, optical communication system, and method of switching port in optical signal repeater

An optical communication system comprising:

• an optical line terminal;
• an optical network unit;
• an optical communication line;
• and
• an optical signal repeater disposed in the optical communication line,
• the optical signal repeater including
• a plurality of ports, each of the plurality of ports being configured to be connectable to both of a first optical transceiver for transmitting and receiving an optical signal to and from the optical line terminal and a second optical transceiver for transmitting and receiving an optical signal to and from the optical network unit,
• a port switching control unit which switches each of the plurality of ports between a first port adapted to the first optical transceiver and a second port adapted to the second optical transceiver,
• a path switching unit configured to switch a transmission path between the plurality of ports in accordance with switching between the first port and the second port, the path switching unit including an aggregation unit configured to aggregate the transmission paths from the second ports so as to connect the transmission paths to the first ports, and
• a path switching control unit configured to control the path switching unit.