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10BaseT Standard

The IEEE committee published the 802.3 specification for running Ethernet over twisted pair wiring in 1990. This 10BaseT (10 Mbps, baseband, over twisted pair cable), is an Ethernet network that typically uses unshielded twisted pair (UTP) cable to connect computers. Usually, 10BaseT employs UTP, but shielded twisted pair (STP) cabling will also work without changing any of the 10BaseT parameters.

The majority of networks of this type are configured as a star, but internally they use a bus signalling system like other Ethernet configurations. Typically, the hub of a 10BaseT network serves as a multi-port repeater. Each computer is located at the end of a cable that is connected to the hub. Each computer has two pairs of wire; one pair is used to receive data, and one pair is used to transmit data.

The maximum length of a 10BaseT segment is 100 metres (328 feet). Repeaters can be used to extend this maximum cable length. The minimum cable length between computers is 2.5 metres (about 8 feet). A 10BaseT LAN will work with up to 1024 computers.