The overhead ratio is a factor that affects the error correction capability of the FEC technology. Generally, when the same FEC encoding/decoding algorithm is used, the higher the overhead ratio is, the larger the net coding gain is.

Since the EALC/ALC function is used in the SOM system, there is a possibility of business interruption during optical power adjustment.

Which of the following description of the PWE3 technology are correct? (Multiple choice)

FOADM includes parallel FOAD and serial FOADM, both supporting 40 waves or 80 waves of arbitrary wavelengths.

The following description of the Flexible ROADM, which is wrong?