| 摘要 |
<p>[PROBLEMS] To detect any degradation of the performance of an optical communication transmission system, after it becoming operational, thereby preventing the reliability of the system from lowering. [MEANS FOR SOLVING PROBLEMS] An optical communication transmission system comprises an active-system switch scheduling means (104) and a performance check scheduling means (105) wherein optical transmitter-receivers (101a,102a) of a redundant system, one of which is an active-system optical transmitter-receiver (101a) and the other of which is a standby-system optical transmitter-receiver (102a), each include a loopback means (103) for inputting an optical signal of a transmitting part (101) to a receiving part (102). The active-system switch scheduling means (104) periodically performs a switching of active system, while the performance check scheduling means (105) causes the loopback means (103) of the standby-system optical transmitter-receiver to operate during a predetermined interval, thereby causing the transmitting and receiving parts of the optical transmitter-receiver to start a performance check process.</p> |
