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100BaseT4

Ethernet standard

  • Transmission rate: 100 MBit/s
  • Max. segment length: 100 m
  • Medium: UTP cable, 4 pairs, category -3, -4, -5
  • Cable impedance: 100 Ohms
  • Connection: 8-pin RJ45 connector
  • Topology: Point-to-point, star (via hub)

The definition of 100BaseT4 separates the physical topology from the logical. By using all four pairs, it is possible to achieve a communication speed of 100 Mbit/s, while still maintaining category 3 bandwidth of 25 MHz. With 100BaseT4, 3 pairs are always used simultaneously for each data direction