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EIA/TIA 568B moving towards 568A
Posted on 02-02-2003 01:23:00 UTC | Updated on 02-02-2003 01:23:00 UTC
Section: /hardware/cabling/ | Permanent Link

Seems that the EIA/TIA 568B wiring standard for Cat5 is possibly getting pushed out by in favor of EIA/TIA 568A. The only difference between the two is that flip pars 2 and 3 (OrangeWhite/Orange & Orange pair gets swapped with the Green/White & Green pair). My readings say that all new wiring installations should use 568A espically if your running Gigabit Ethernet. Most patch cables today in the US at least are using 568B. I doubt there will be any difference if either standard is used all things will still work the same. The other thing I did find out today is that CAT5 cable lenghts can be to small. None should be under 3FT and the minimum recommended length is is 7FT to avoid any problems at all. You can use some under 7FT and they will probally work fine but don't use any under 3FT. Gigabit seems to be effected by length more than any so try a longer cord if your having problems and make sure it is CAT 5e. I will note that I have made crossover cables 6 inches long and they worked fine. Just keep the length in mind if weird things start happening if your using under 3FT cat5 cables.

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