ADSS, GYXTW, GYTA, armored, and air-blown cables — 2 to 288 cores for aerial, duct, and direct burial. Outdoor fiber optic cables must survive where indoor cables cannot — extremes of temperature, UV exposure, moisture ingress, mechanical stress, and even rodent attack. The number of optical cores in an optical fiber is the total number of equipment interfaces multiplied by 2, plus 10% to 20% of the spare quantity, and if the communication mode of the equipment has serial communication and equipment multiplexing, you can reduce the number of cores. It incorporates both a steel messenger and the core of a standard optical fiber cable into a single jacket of figure-eight cross-section. The. Aerial Outdoor All-dielectric self-supporting (ADSS) fiber optic cables Fiber Type: ITU G652D,G657A,OM1,OM2,OM3,OM4; Fiber Count:2-432 Fibers Span: 200M, 400M, 600M, Up to 1000M; Standard: IEC 60794-4、IEC 60793、TIA/EIA 598 A; The double-jacket cable design allows for higher tensile strength with. Fiber optic cables are the backbone of modern internet infrastructure, but choosing the right one can be tricky. One key factor is the number of cores, which impacts how much data you can transmit.