| 摘要 |
The present invention relates to an optical line monitoring device, an optical line monitoring system having the same and a controlling method thereof. The optical line monitoring device according to the present invention includes an OTDR that selectively emits monitoring light to an optical line, which connects a transmitter terminal with a receiver terminal, and receives reflected monitoring light, and an analysis device that analyzes a waveform of the monitoring light. The analysis device sets at least two kinds of reflective peak factor threshold values in a reference waveform of the monitoring light, measures at least two kinds of reflective peak factors corresponding to the reflective peak factor threshold values, determines a reflective peak by comparing the reflective peak factor threshold values with the measured reflective peak factors, measures at least two kinds of reflective peak factors in a measurement waveform of the monitoring light, determines a reflective peak by comparing the reflective peak factor threshold values with the measured reflective peak factors, and determines a malfunction by comparing the reflective peak factor of the reflective peak in the reference waveform with the reflective peak factor of the reflective peak in the measurement waveform. |
