100Mbps Ethernet on Twisted-Pair Cabling

During the 100Mbps Ethernet development effort, three separate teams of engineers pursued different technical approaches to pushing 100Mbps across twisted–pair cabling. As a result, three distinct twisted-pair physical specifications were written:

  • 100BASE-TX—This version was marketed first and is by far the most popular. It runs across two pairs of wires, either Category 5 UTP cable or IBM Type 1 shielded twisted–pair cable.

  • 100BASE-T4—This version runs across four Category 3 (or better) twisted pairs. Although far less popular than the TX version, it is useful for environments that do not have either Category 5 or shielded twisted-pair cabling. It has some shortcomings, however: The worst is ...

Get Local Area High Speed Networks now with the O’Reilly learning platform.

O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.