654 describes the geometrical, mechanical and transmission attributes of a single-mode optical fibre and cable which has the zero-dispersion wavelength around 1 300 nm wavelength, and which is loss-minimized and cut-off wavelength shifted at around the. Recommendation ITU-T G. E, making it ideal for high-capacity, long-haul terrestrial networks. FutureGuide™-HSC-125, fully compliant with ITU-T G. E, combines ultra-low attenuation with. Coherent optical technology and G. Sumitomo Electric Industries, Ltd. E were introduced and have been extensively deployed worldwide. Over longer distances, such as between two data centres, signal regeneration or addition ng-distance transmission,” said Xavier Renard, Telecom Marketing Di ector at ACOME.