It means that OM5 will work much better with multi-wavelength SWDM transceivers (850 nm to 940 nm) like 40 SWDM4, 100G SWDM4, and 400G-BD4. 2, but won't add any extra value when used with standard 1G, 10G, 25G, 40G, and 100G transceivers working at the 850 nm range. Single-mode (SMF) and multi-mode fiber (MMF) use different core sizes, sources and wavelengths. These differences determine which transceivers work with which fiber and how far signals can travel. Understanding the compatibility constraints prevents costly downtime and troubleshooting. If a module is connected with OM1/OM2 fibers, while the other one is connected with OM3/OM4 fibers, then the connection won't be. 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 the 850 nm and 1300 nm wavelength and is used for short distance interconnections (up to 550m). Fiber optic cabling is an alternative to copper cabling for data transmission. By using pulses of light, the distance over. In comparing singlemode vs. This is made possible by its relatively large core diameter, typically 50 or 62.