High Quality Content by WIKIPEDIA articles! XFI is a 10 gigabit per second chip-to-chip electrical interface specification defined as part of the XFP multi-source agreement. It was developed by the XFP MSA group. XFI's principal applications are for 10 Gigabit Ethernet, 10 Gigabit/sec Fibre Channel, SONET OC-192, SDH STM-64, 10 Gigabit/sec OTN OTU-2, and parallel optics links. XFI provides a single lane running at 10.3125 Gbit/s when using a 64B/66B encoding scheme. XFI is sometimes pronounced as "X" "F" "I" and other times as "ziffie". As of 2009[update] most 10 Gigabit Ethernet products use XAUI interface that has four lanes running at 3.125Gbit/s using 8B B encoding. Most 10 Gigabit Ethernet Products require a SerDes device to make the transition from XAUI to XFI. Some 10 GbE devices have an integrated both XAUI and XFI capabilities.

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