40G applications typically use 4 pairs of fibres (8 fibres) – achieved using a single 8-fibre or 12-fibre MTP/MPO connector, and 100G applications using 10 pairs (20 fibres) – achieved using a single 24-fibre MTP/MPO connector, or a pair of 12-fibre MTP/MPO connectors. Multimode fiber remains a leading optical media in the data center for short-reach distances up to 150 meters. The OM2 fiber type of multimode was standardized in 1998. It still uses LEDs as its light source, but its core, when compared to OM1, is smaller. OM3, OM4, and OM5 are types of multi-mode optical fibres commonly used in data centres and enterprise environments to support various network speeds and transmission distances, including 10 gigabit Ethernet (10G), 40 gigabit Ethernet (40G), 100 gigabit Ethernet (100G) and 400 gigabit Ethernet. OM5 is the sole fiber with SWDM (Short Wavelength Division Multiplexing) capability. It operates across four wavelengths from 850 nm to 953 nm. You don't need extra fiber cables. Understanding these differences helps you choose the right multimode fiber.