The 400G Bidirectional (BiDi) Multi-Source Agreement (MSA) Group today announced the publication of release 1.0 of its 400G-BD4.2 Specification for a 400 Gb/s optical interface over 100 meters of multimode fiber. The MSA group is dedicated to defining optical interface specifications based on a dual wavelength BiDi transmission technology, which enables a reduction in the fiber count relative to other solutions.

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