Ethernet Over Twisted Pair - Variants

Variants

Speed Distance Name Standard
/ Year
Description
1 100 (nominally) StarLAN 802.3e 1986 Runs over four wires (two twisted pairs) on telephone twisted pair or Category 3 cable. An active hub sits in the middle and has a port for each node. Manchester coded signaling.
10 100 (nominally) LattisNet (pre) 802.3i 1987 Runs over AT&T Premises Distribution System (PDS) wiring or four wires (two twisted pairs) on telephone twisted pair or Category 3 cable.
10 100 (nominally) 10BASE-T 802.3i 1990 Runs over four wires (two twisted pairs) on a Category 3 or Category 5 cable. Star topology with an active hub or switch sits in the middle and has a port for each node. This is also the configuration used for 100BASE-T and gigabit Ethernet. Manchester coded signaling.
100 100 100BASE-TX 802.3u 1995 4B5B MLT-3 coded signaling, CAT5 copper cabling with two twisted pairs.
1000 100 1000BASE‑T 802.3ab 1999 PAM-5 coded signaling, At least Category 5 cable, with Category 5e strongly recommended copper cabling with four twisted pairs. Each pair is used in both directions simultaneously.
10 000 100 10GBASE‑T 802.3an 2006 THP PAM-16 coding. Uses category 6a cable.

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