IEEE 802.3cm-2020 - IEEE Standard for Ethernet -- Amendment 7: Physical Layer and Management Parameters for 400 Gb/s over Multimode Fiber
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This amendment to IEEE Std 802.3-2018 adds Clause 150. This amendment adds Physical Layer (PHY) specifications and management parameters for 400 Gb/s operation on four pairs (400GBASE-SR4.2) and eight pairs (400GBASE-SR8) of multimode fiber, over reaches of at least 100 m. (The PDF of this standard is available at no cost to you compliments of the IEEE GET Program. For detail on this program go to
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