ANSI/EIA (American National Standards Institute/Electronic Industries Association) Standard 568 is one of several standards that specify "categories" (the singular is commonly referred to as "CAT") of twisted pair cabling systems (wires, junctions, and connectors) in terms of the data rates that they can sustain. The specifications describe the cable material as well as the types of connectors and junction blocks to be used in order to conform to a category. CAT 5 is associated with Gigabit Ethernet, and 5E ATM.
A source for information on copper and copper alloys. Article "Category 5: How Did We Get Here and Where Do We Go Next?" is available.
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