Patent ID: 8290363

Claim:
An optical fiber line automatic monitoring system which selects an optical fiber within an optical fiber line and observes an OTDR waveform by injecting a test optical pulse into the selected optical fiber, to thereby determine a failure location, comprising: an alarm signal reception portion which receives information with regard to an optical fiber with a failure as an alarm signal from a network monitoring apparatus which detects a communication error; an optical switch which is configured to switch between optical fibers to select one of the optical fibers into which a test optical pulse is to be injected; a test target optical fiber selection portion which identifies, based on failure occurrence information included in the alarm signal received by the alarm signal reception portion, the optical fiber with a failure, and selects a test target optical fiber using the optical switch; an optical fiber test portion which injects a test optical pulse into the optical fiber selected by the test target optical fiber selection portion to observe an OTDR waveform; and an optical fiber failure location determination portion which determines a location of failure in the optical fiber based on a test result by the optical fiber test portion.