The 40 Gbit/s and 100 Git/s coherent systems do not require dispersion compensation because the coherent board has a large dispersion tolerance. NG WDM does not support non-coherent networks and coherent networks for hybrid transmission.

What are the ways that NG WDM devices create fibers? (Multiple Choice)

MPLS-TP is a subset of MIPLS that removes connectionless IP-based forwarding and adds end-to-end OA functionality.

For a 10G OTU board, the receiving end optical module uses PIN module. Which of the following receiving powers is in the normal receiving range of the board?

When configuring 1+1 optical line protection, you can select RI1/TI2/TO2 as the working channel according to the actual situation.