Value of pre-FEC BER of the LWF board in FEC or AFEC mode on WDM 1600G devices that causes post-FEC BER

When the pre-FEC BER reaches 10E�?, the bit error handling will be initiated. The error correction threshold of Huawei WDM devices can reach around 10E�? for FEC which meets the G.975 protocol standards, and reach around 10E�? to 10E�? for AFEC.

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