The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 31, 2022
Filed:
Jan. 15, 2020
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
Takui Uematsu, Tokyo, JP;
Hiroyuki Iida, Tokyo, JP;
Hidenobu Hirota, Tokyo, JP;
Naotsugu Ambe, Tokyo, JP;
Nippon Telegraph and Telephone Corporation, Tokyo, JP;
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 unitconfigured to receive, as a received signal, at least one of a downlink optical signal transmitted from an OLTor an uplink optical signal transmitted from an ONU; and a signal analysis unitconfigured 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.