If the fiber cable in your network is orange, it is likely OM1. km @ 850 nm, as opposed to 200 for OM1. If you encounter orange cable that is not marked OM1. When you look at a fiber optic cable, the outer jacket color instantly tells you what type of fiber is inside. This color-coding system is standardized under TIA-598-C, making it easier for technicians and installers to identify cables at a glance. OM1. This guide explains the five generations of multimode fiber - OM1, OM2, OM3, OM4, and OM5 - covering their physical characteristics, color coding, bandwidth, maximum distances at different data rates, optical sources (LED, VCSEL, SWDM), and real-world applications in enterprise networks and data. Fiber optic cables come in a variety of colors, and these colors aren't just for aesthetics – they actually indicate the type of fiber inside the cable. What Do different fiber strand colors represent? In. In high-speed data centers and network environments, knowing the OM (Optical Multimode) grade and its corresponding industry color standard is crucial, especially when dealing with high-density MPO/MTP fiber patch cables! Understanding these colors is key to quickly identifying the fiber type.