Patent ID: 11876555
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A breakdown determination method executed by a breakdown determination system, the method comprising:
switching a transmission path of optical signals between an upper network and a lower network;
selecting a standby port of an intermediate communication device configured to relay communication between the upper network and the lower network;
connecting, via a switching device configured to switch the transmission path of the optical signals between the upper network and the lower network, to the standby port that is selected and measuring an optical signal of the standby port that is connected;
determining whether the intermediate communication device including the standby port that is selected breaks down based on a result of measuring the optical signal; and
recording, in a storage device, a result of determining whether the intermediate communication device breaks down,
wherein, in selecting the standby port, the standby port that meets a condition of a communication standard of the optical signal is selected.