MASTER-STATION APPARATUS, SLAVE-STATION APPARATUS, CONTROL DEVICE, OPTICAL COMMUNICATION SYSTEM, AND CONNECTION MANAGEMENT METHOD

An OLT including ports connectable to an optical communication path connected to an ONU includes port control units, a setting information management unit that manages setting information for use in communication with the ONU for each of the ports, and a connection management unit that sets setting information managed by the setting information management unit in the port control units. The port control units determine whether to change setting information on the basis of a signal received from the ONU and the setting information that has been set and, when determining that setting information be changed, notify the connection management unit of a request to change setting information, and the connection management unit selects setting information set in the port control units on the basis of the notification from the port control units.