| 摘要 |
<P>PROBLEM TO BE SOLVED: To enhance the accuracy of determining an optical fiber path core wire of a work object. <P>SOLUTION: A monitoring point is provided along an optical fiber path connecting an OLT 11 and an OLT 17 of an optical fiber path network to extract a portion of a transmission light signal and input the extracted portion to a core wire determination device 14. The device 14 records a transmission frame at timing when an optical signal passes through the monitoring point from an extraction result of the optical signal transmitted at the monitoring point in a vertical direction, acquires a device time and device information belonging to the ONU 17 or ONU 11 from the frame to acquire distance information between the monitoring point and the ONU and ONU unique identification information, and measures an optical fiber path length from the monitoring point to a far end of the an optical fiber path. Then, the distance information between the monitoring point and the ONU is compared with the measurement optical fiber path length, and a reflection point in the optical fiber path is collated with ONU information of the far end of the optical fiber path. In the analysis, the loss of reversibility is given to the optical fiber path, and core wire information of the optical fiber path is acquired from a change in optical fiber path light measurement data which occurs before or after the loss is given, and ONU information coincident with the measurement fiber path in the collation. <P>COPYRIGHT: (C)2013,JPO&INPIT |
