Talk:Multi-mode optical fiber

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The 400MB/s FC-AL standard offers 2Gbps over 70m of multimode fiber (62.5µm) according to Fibre Channel. Additionally, there are two popular types of multimode fiber: 62.5µm and 50µm. These measures indicate the size of the fiber's core. These two core sizes have slightly different attenuation properties and generally should not be mixed (which causes greater attenuation). Both sizes of multimode fiber are recognized in the standards for Ethernet (IEEE 802.3), Fibre Channel, ATM, FDDI, and Token Ring (among others).