This effect is
known Near End Cross Talk (NEXT). Transmission
standards, such the network classes according to
EIA/TIA 568A/B 50173-1, specify the maximum
NEXT values for transmission path. The curves be-
low show the transmission characteristics high-qual-
ity and inferior cables.NEXT
Due capacitive inductive coupling, signal com-
ponents from pair wires can coupled onto an-
other pair and cause interference there.
Crosstalk pairs wires
Good NEXT values
Limit values
Relevant frequency range
Poor NEXT values
Schematic diagram NEXT measurement: comparison good and poor NEXT values
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Chapter The internal lightning protection system
