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10GBASE-T, or IEEE 802.3an-2006, is a standard released in 2006 to provide 10 gigabit/second connections over unshielded or shielded twisted pair cables, over distances up to 100 metres (330 ft). 10GBASE-T cable infrastructure can also be used for 1000BASE-T allowing a gradual upgrade from 1000BASE-T and auto-negotiation to select which speed to use. 10GBASE-T uses 650 MHz versions of the IEC 60603-7 8P8C or RJ-45 connectors already widely used with Ethernet. 10GBASE-T will work up to 55 m (180 ft) with existing Category 6 cabling. In order to allow deployment at the usual 100 m (330 ft), the standard uses a newpartitioned Category 6a (a.k.a "augmented Cat6") cable specification, designed to reduce crosstalk between UTP cables (formally known as "alien crosstalk"). The 802.3an standard defines the wire-level modulation for 10GBASE-T as a Tomlinson-Harashima precoded (THP) version of pulse-amplitude modulation with 16 discrete levels (PAM-16), encoded in a two-dimensional checkerboard pattern known as DSQ128.
10GBASE-T Tutorial
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