| 摘要 |
PROBLEM TO BE SOLVED: To provide a redundant system optical transmission line switching device with a simple configuration capable of preventing the occurrence of leak and unnecessitating an optical receiver exclusively for a monitor signal. SOLUTION: A redundant system optical transmission line switching device 100 detects an error in an optical fiber cable 4a of an active system optical transmission line 22a and an optical fiber cable 4b of a standby system optical transmission line 22b, uses a power supply connection means that connects a light receiving element of an optical receiver in the normal optical transmission line system to a power supply to select an optical signal from the active optical transmission line 22a and the standby system optical transmission line 22b and provides an output of an electric signal. |
