Corning® SMF-28® ULL Optical Fiber, ITU-T G.652.B And ITU-T G.654.C-Compliant Fiber has the lowest loss of any 80μm² terrestrial-grade, single-mode fiber available in the market with millions of kilometers deployed worldwide. SMF-28 ULL fibers are designed for the most challenging long-haul and high data rate networks, enabling customers to scale their core networks to ≥400G data rates at a lower overall cost per bit. Ultra-low-loss fiber also allows carriers and cloud operators to extend optical reach at very high data rates and makes core networks scalable for higher capacities as the demand for bandwidth continues to grow.