Term
Definition
Coupling
The transfer of energy (without direct electrical contact) between two or more cables or components of a circuit.
Crosstalk
A type of interference caused by signals from one pair or cable being coupled into adjacent pairs or cables. Can occur with audio, data, or RF signals.
Disturbed Conductor
A conductor that receives energy generated by the field of another conductor or an external source. e.g. the quiet line.
ELFEXT
Equal Level Far End Crosstalk (dB). A subtraction of attenuation from FEXT. By subtracting the attenuation, ELFEXT negates the effects of attenuation on the interference as it propagates down the cable, thus bringing it to an "equal level".
FEXT
Far End Crosstalk. Crosstalk induced on the pairs, measured at the "far" end of the cable, referenced to the near end input signal. Usually expressed in decibels.