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www.cumberland.tec.nj.us/cisco/Class/network/D1studyguides/Chapt4SGQ.doc -
FEXT(far end crosstalk)
NEXT(Near end crosstalk)
for explanation visit the link below]

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Posted by waqasahmad

FEXT(far end crosstalk)
NEXT(Near end crosstalk)
for explanation visit the link below]
http://www.tmworld.com/article/CA475935.html

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Posted by Hash007

Near-end crosstalk is a phenomenon that can take place when there is some form or electromagnetic interference taking place with relatively close to the point of measurement. The effect of near-end crosstalk is that the signals being carried by two different cables or wires may begin to interfere with one another in a manner that degrades the signal of at least one of the two transmissions. The problem can take place due to something as simple as a temporary twisted pair cabling or worn spots in the insulation of the cabling proper that allow the wiring of the two cables to come into close proximity.

Along with near-end crosstalk or NEXT, there is also the occurrence of what is known as far-end crosstalk or FEXT. FEXT is essentially the same set of circumstances that occur with near-end crosstalk. The only difference is that far end crosstalk is the detection of a signal crossing or disruption that is located at a distance from the point of measurement.

For more detail please visit the following link:

http://www.wisegeek.com/what-is-near-end-crosstalk.htm

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Posted by sagitraz

Near End Crosstalk (NEXT)
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Also known as self-crosstalk.
Coupling of signal from one pair to another.
Coupling takes place when transmit signal entering the link couples back to receiving pair. i.e. near transmitted signal is picked up by near receiving pair.

Far End Crosstalk
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Same but on other pair.

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Posted by waqqas1