Sumitomo Electric Lightwave (SEL) has developed a 3456-fiber pre-connectorized ultra-high-fiber-count (UHFC) optical fiber cable that uses 200 µm Freeform Ribbon™ fibers and a slotted core structure. At both ends of the cable, 144 pcs of 24-fiber multi-fiber push-on (MPO) connectors (with an insertion loss of <0.35dB) are fully factory assembled at each end. Because these MPOs are factory assembled, no additional connector assembly is required in the field; simply plug them into the adapters.