Short for Category 5, network cabling that consists of four twisted pairs of copper wire terminated by RJ45 connectors. Cat-5 cabling supports frequencies up to 100 MHz and speeds up to 1000 Mbps. It can be used for ATM, token ring, 1000Base-T, 100Base-T, and 10Base-T networking.
Computers hooked up to LAN s are connected using Cat-5 cables, so if you're on a LAN, most likely the cable running out of the back of your PC is Category 5.
Cat-5 is based on the EIA/TIA 568 Commercial Building Telecommunications Wiring Standard developed by the Electronics Industries Association as requested by the Computer Communications Industry Association in 1985.
568-B Wiring (RJ-45) | . | 568-A Wiring (RJ-45) |
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Notes for wiring diagrams above:
1. For patch cables, 568-B wiring is by far,
the most common method.
2. There is no
difference in connectivity between 568B and 568A cables. Either
wiring should work fine on any system*. (*see notes
below)
3. For a straight through cable, wire both ends
identical.
4. For a
crossover cable, wire one end 568A and the
other end 568B.
5. Do not confuse pair numbers with
pin numbers. A pair number is used for reference only (eg: 10BaseT
Ethernet uses pairs 2 & 3). The pin numbers indicate actual physical
locations on the plug and jack.
See Also:
file: /Techref/cat5.htm, 24KB, , updated: 2018/3/16 08:14, local time: 2024/12/2 06:59,
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