copper cables with lengths up to at least 2 m (400GBASE-CR4)

802.3cm project

* 400 Gbit/s Ethernet
** Define a physical layer specification supporting 400 Gbit/s operation over 8 pairs of MMF with lengths up to at least 100 m (400GBASE-SR8)
**Define a physical layer specification supporting 400 Gbit/s operation over 4 pairs of MMF with lengths up to at least 100 m (400GBASE-SR4.2)

802.3cn project

* 200 Gbit/s Ethernet
** Provide a physical layer specification supporting 200 Gbit/s operation

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