Patent ID: 9553665
Date: 2017-01-24
CPC Classifications: H04B,H04J

Claim:
1. An apparatus for detecting an optical line fault in a Passive Optical Network (PON), comprising: an optical distribution unit configured to, when a multiplexed signal of a downstream light signal and a monitoring light signal is input, distribute the multiplexed signal to an Optical Network Unit (ONU) of a first optical path and to a second optical path; and an optical layer management unit installed in the second optical path, and configured to set a time at which the monitoring light signal of the multiplexed signal provided to the second optical path is received to a starting time of monitoring light measurement, compare a monitoring light signal reflected and returned from the ONU with a signal pattern obtained when no fault occurs, and then determine whether a fault has occurred in a distribution network, wherein the optical distribution unit comprises a power splitter and a monitoring light receiving filter unit, the power splitter transmits the multiplexed signal both to the monitoring light receiving filter unit and to the optical layer management unit, and the monitoring light receiving filter unit transmits the multiplexed signal received from the power splitter to the ONU, and transmits a monitoring light signal reflected and returned from the ONU to the optical layer management unit.