OM4 fiber optic cables mounted. OM4 Fiber optics is optimized for laser, with a high bandwidth, with core diameter of 50 .mu.m, and cladding diameter of 125?m. The OM1 and OM2 regulations allow speeds of Gigabit Ethernet (1 Gbit/s). The OM3 regulations allow speeds up to 10 Gigabit Ethernet at a distance of 300 m. The OM4 multimode fiber optic cable using optimized 50 .mu.m/125?m, which permiten speeds up to 10 Gigabit Ethernet at a distance of 550m (850nm). Certification and OM4 cables of different lengths. Range multimode fiber optic cables (MMF) OM4 simplex ST-ST.