| 摘要 |
The method involves transmitting working signals and protection signals bidirectionally between two terminal multiplexers (TM1,TM3) of different network nodes (A,B) via working and protection connections through separate optical waveguides (L1,L2). The protection connections between the terminal multiplexers TM1, TM3 and TM2, TM4 use protection signals with different wavelengths, and are present in the another part of the ring network. Working signals are also transmitted bidirectionally between the add and drop multiplexers (ADM1 - ADM4), using sequential working connections (ADM: 1-2,-3,3-4,-1). Further protection signals are transmitted, through the other part of the network, between the ADMs, with different wavelengths for each connection. |
