| 摘要 |
An apparatus and method for monitoring an optical fiber that links a first node and a second node. An apparatus includes: a first transmitting part for outputting a first check light, which is modulated by the first pattern signal, to the optical fiber link. A first receiving part demodulates the second pattern signal from the second check light, which is input by the optical fiber link. A first processor generates the first pattern signal and outputs the first pattern signal to the first transmitting part, and receives the second pattern signal from the first receiving part.
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