100BaseTX - Network Encyclopedia

100Base-TX is a type of standard for implementing Fast Ethernet networks. 100BaseTX is based on 802.3u, which is an extension of the 802.3 specifications of Project 802 developed by the IEEE. 100BaseTX and a related standard, 100BaseFX, are sometimes collectively referred to as 100BaseX.

The "100" in the media type designation refers to the transmission speed of 100 Mbit/s, while the "BASE" refers to baseband signaling. The letter following the dash ("T" or "F") refers to the physical medium that carries the signal (twisted pair or fiber, respectively), while the last character ("X", "4", etc.) refers to the line code method used. Fast Ethernet is sometimes referred to as 100BASE-X, where "X" is a placeholder for the FX and TX variants.

See also:
10BaseT -    • 10BaseT Network - Network Encyclopedia