Not included in Table 1-4 is a copper media option. 1000BaseCX uses a 150-Ohm balanced shielded copper cable. This new cable type is not well-known in the industry, but is necessary to support the high-bandwidth data over copper. 1000BaseCX supports transmissions up to 25 meters. It is intended to be used to interconnect devices collocated within an equipment rack very short distances apart. This is appropriate when Catalysts are stacked in a rack and you want a high speed link between them, but you do not want to spend the money for fiber optic interfaces.
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