Main Page | See live article | Alphabetical index Category 3 cable, commonly known as Cat-3, is an unshielded twisted pair cable designed to reliably carry data up to 10Mbps. It was a popular cabling format in the early 1990s, but has since been almost entirely replaced by the very similar Cat-5, which offers higher top speeds. See the Cat-5 entry for details. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.