ITU-T G.709.6 PDF

This Recommendation¹ specifies a set of interoperable FlexO Beyond 400G (B400G) long-reach interfaces. The rates in scope for FlexO-x(e)-<int> are 400G and 800G (x=4 and 8). The Recommendation specifies the structure using forward error correction codes with a higher coding gain suitable for longer reach applications, and references common elements from [ITU-T G.709.1] and FEC structures from [ITU-T G.709.3].

The optical parameters associated with FlexO B400G long-reach interfaces are provided by application codes, which are expected to be specified for 400G and 800G in a future edition of [ITU-T G.698.2].

¹ This Recommendation includes an electronic attachment with the test vectors specified in Annex B.