Generally, fiber patch cables are categorized into different groups based on optical fiber mode, fiber cable type, termination types, connector polishing styles and fiber cable sizes. To specify this introduction, I will bring in fiber patch cable types from Ingellen.com for your reference.OM means optical multi-mode. Multi-mode optical fiber is a kind of optical fiber mostly employed for communication over short distances, such as inside a building or on the campus. Multi-mode fibers are described using a system of classification determined by the ISO 11801 standard as OM1,SC TO LC MULTIMODE OM2 Duplex, and OM3, which is in line with the modal bandwidth of the multi-mode fiber. Here are the meanings of these: 62.5/125um multimode fiber (OM1), 50/125um multimode fiber (OM2 Duplex), and laser optimized 50/125um multimode fiber (OM3). This article is mainly about OM3, rapid for OM3 fiber patch cable.Laser Optimized Multimode Fiber (OM3) has been around since 1999. It supports 300-meter link lengths for 10 Gb/s applications and it is tested to ensure a 2,000 MHz-km Effective Modal Bandwidth (EMB). Its industry-standard 50um core size couples sufficient power from LED sources to support legacy applications like Ethernet, Token Ring, FDDI, and Fast Ethernet for virtually all in-building networks and many campus networks. The 50um core size is also directly suitable for laser-based applications like Gigabit Ethernet and Fibre Channel, etc. Furthermore, it's the recommended multimode fiber type in ANSI/EIA/TIA-942, Telecommunications Infrastructure Standard for Data Centers.