Patent ID: 11349563

Abstract:
Provided are a communication monitoring method and a communication monitoring apparatus capable of an operation of identifying a coated optical fiber regardless of a propagation direction of an optical signal even before communication between an OLT and an ONU is opened.The communication monitoring apparatus according to the present invention includes: an optical signal detection unit 31 configured to receive, as a received signal, at least one of a downlink optical signal transmitted from an OLT 21 or an uplink optical signal transmitted from an ONU 22; and a signal analysis unit 32 configured to detect a signal type and unique information of a transmission source from information included in the received signal, determine whether the received signal is the downlink optical signal or the uplink optical signal on the basis of the signal type, and determine that the unique information of the transmission source is unique information of the OLT when the received signal is the downlink optical signal and that the unique information of the transmission source is unique information of the ONU when the received signal is the uplink optical signal.