OM4 is an enhanced upgraded model based on OM3 laser optimization, retaining the 50/125µm core structure, with a standard violet outer jacket (individual manufacturers may use aqua color). It further optimizes internal optical design, lifting the effective bandwidth to 4700MHz·km. High-Speed Computing switch fabrics Panduit® Laser-Optimized OM4 fibers extend the application of multimode fiber to support transmission at 10 Gb/s (at extended reach) and future speeds such as 40 and 100 Gb/s. When using low cost 850 nm Vertical Cavity Surface Emitting Laser (VCSEL) transceivers. This Applications Engineering Note (AE Note) discusses the criteria for properly selecting the optimal multimode fiber (MMF) for enterprise applications. This AE Note classifies multimode fiber according to the following broad categories. Multimode Fiber (MMF) has a core diameter, typically 50–100 micrometers, has ability to transfer multiple modes of light through the fiber core, uses lower-cost electronics (LED, VCSEL) operates at. OM4 patch cables stand at the forefront of high-speed connectivity, embodying versatility and resilience precisely when speed and reliability are paramount in our digital age. With a 50-micron core, they redefine networking dynamics, making significant strides in short-distance transmissions.