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The IEEE 802.3ba amendment that will add 40 Gb/s and 100 Gb/s rates to the Ethernet standard is nearing completion, scheduled for publication in mid 2010. The draft currently specifies supportable distances of 100 meters on OM3 fiber and 150 meters on OM4 fiber for both rates. The common distances for both rates are the result of using inverse multiplexing over parallel fibers, wherein the signals are transmitted over multiple lanes, each operating at 10 Gb/s. The 40 Gb/s interface employs four of these lanes in each direction, while the 100 Gb/s interface employs ten.
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