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EIA/TIA-568A;
ISO/IEC 11801;
EN50173.
, , - IBM.
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o - NEXT (Near End Cross Talk). . NEXT - , , . NEXT 5 . , , . .
o - FEXT loss (Far End Crosstalk loss). . NEXT . , FEXT , , . (). FEXT, . .
. , . . , , , . UTP (Unshielded Twisted Pair), - STP (Shielded Twisted Pair).