Far End Crosstalk (FEXT) is an
electromagnetic interference (EMI), a type of
crosstalk, introduced on
UTP by close-by wires, usually running in parallel with the FEXT induced wire."Far End" refers to the inductance of EMI in the end further from the end being measured on the alternate wire in a pair.In opposition to this,
NEXT (Near End Cross Talk) is the detection of EMI on a wire whose inductance is at the same end as the measurement point. Obviously NEXT is stronger at the other end due to attenuation of the crosstalk signal.
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Crosstalk that is propagated in a disturbed
channel in the same direction as the
propagation of a
signal in the disturbing channel. Note: The terminals of the disturbed channel, at which the far-end crosstalk is present, and the energized terminals of the disturbing channel, are usually remote from each other. (
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