ieee 802.3ab The IEEE 802.3ab stand

ieee 802.3ab The IEEE 802.3ab standard, known as 1000BaseTX, defines
Gigabit Ethernet that runs over twisted-pair cabling and uses characteristics of
100BaseTX networking, including the use of RJ-45 connectors and the access
method of CSMA/CD. Like 100BaseTX, 1000BaseTX uses CAT 5e or CAT 6
unshielded twisted-pair; the difference is that 100BaseTX runs over two pairs (four
wires) while 1000BaseTX runs over four pairs (all eight wires).