| 摘要 |
Embodiments of the present invention relate to a method, an optical add-drop multiplexer branching unit, and a system for disaster recovery of an optical communication system. The method for disaster recovery of an optical communication system using an optical add-drop multiplexer unit OADM includes: detecting a transmission link fault in an optical communication system; and when a transmission link fault is detected, switching the state of a link where the transmission link fault occurs from pass-through to loopback, so that an optical signal input from a non-faulty end of the link is looped back to the end for outputting. In this way, when a transmission link fault occurs in an optical communication system, the power level of a link where the transmission link fault occurs can be maintained by using the solutions in the embodiments of the present invention, thereby keeping transmission performance stable, and enhancing the disaster recovery capability of the optical communication system. Furthermore, the solutions in the embodiments of the present invention do not introduce extra energy into a transmission link, thereby introducing no spontaneous emission noise and ensuring system performance. |
