OPTICAL COMMUNICATION SYSTEM, INTERFACE BOARD AND CONTROL METHOD PERFORMED IN INTERFACE BOARD

摘要

An embodiment of the invention is an optical communication system including: a plurality of interface boards which transmit and receive optical signals to and from interface boards facing the plurality of interface boards; and a monitoring control device 105, 106 which monitors states of the plurality of interface boards. A first interface board of the plurality of interface boards includes: a replacement unit capable of monitoring the states of the plurality of interface boards on behalf of the monitoring control device 105, 106 and independently receiving supply of power; and a control unit 308 configured to start the replacement unit in a case where a fault occurs in the monitoring control device 105, 106 and stop or halt the replacement unit in a case where there is no fault in the monitoring control device 105, 106.