How to check if DWDM line has CRC error?

 How to check if DWDM line has CRC error?

Analysis of the causes of CRC error messages in wavelength division transmission networks

Based on many years of experience in the application and installation of wavelength division transmission networks, we summarize the following reasons for the occurrence of CRC error messages, which can be used for practical reference:

1. The light attenuation is large, and the light received by the optical module is weak, close to the critical value.
2. The influence of dispersion, the transmission distance is long, and the dispersion compensation is not enough.
3. The cumulative signal-to-noise ratio of the line is low, affecting signal integrity.
4. Nonlinear effects. Single-wave optical power is too large, causing nonlinear effects.

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