FEC, AFEC, and super modules

FEC and AFEC are different encoding formats. The difference between the super board and non-super board lies in modulation formats. The AFEC and super modules are designed for adding the transmission distance of WDM equipment without regeneration. The following combinations are available:
Common FEC
Common FEC + Super module
AFEC
AFEC +Super module
Signals of different modulation formats can be interconnected, while signals of different encoding formats cannot be interconnected. That is, OTU boards with and without the super module can be interconnected, but OTU boards of the AFEC and FEC encoding formats cannot be interconnected.

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