The test achieved a maximum transmission capacity of 64Tbps and a maximum transmission distance of more than 1,200 kilometers without electric relay, confirming the technical feasibility of 800G/400G hybrid transmission. Recommendation ITU-T G. 652 describes the geometrical, mechanical and transmission attributes of a single-mode optical fibre and cable which has zero-dispersion wavelength around 1310 nm. 652 fibre was originally optimized for use in the 1310 nm wavelength region, but can also be used in. G. 652 optical fiber cable, and extended C+L technology. 657 are ITU-T standardized singlemode fiber types used across long-haul, metro, ODN, and FTTH networks.
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