10GBASE-ER
10GBASE-ER ("extended reach") uses the IEEE 802.3 Clause 49 64B/66B Physical Coding Sublayer (PCS) and 1550 nm lasers. It delivers serialized data over single-mode fiber at a line rate of 10.3125 Gbit/s.
10GBASE-ER has a reach of 40 kilometres (25 mi).
December 18, 2010