100BASE-T uses one twisted wire pair for transmit and one for receive exclusively in a three level MLT signalling scheme.
1000BASE-T uses all 4 pairs for send and receive in a 5-level pulse ampitude modulation (PAM-5) technique.
Fact-index.com financially supports the Wikimedia Foundation. Displaying this page does not burden Wikipedia hardware resources. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.