Which term is the measure of the amount of signal interference from one pair into the pair next to it in the same cable?

Which term is the measure of the amount of signal interference from one pair into the pair next to it in the same cable?

• A. Crosstalk
• B. ACR
• C. NEXT
• D. FEXT

Answer: (C)

The situation describes a specific kind of interference within a multi-pair cable: energy from one transmitting pair couping into a neighboring pair. When this interference is measured at the near end—the same end where the transmitter is located—we call it near-end crosstalk (NEXT). This metric focuses on how much the signal on one pair shows up on an adjacent pair right at the transmitter end, which is a key concern for maintaining signal integrity in the first portion of the cable run. This differs from far-end crosstalk (FEXT), which is observed at the far end of the cable, and from the general term crosstalk, which describes the phenomenon itself without specifying where the measurement is taken. ACR, Attenuation-to-Crosstalk Ratio, is a related performance figure that combines attenuation and crosstalk but is not the term for the interference amount itself. So the measure described is near-end crosstalk.

The situation describes a specific kind of interference within a multi-pair cable: energy from one transmitting pair couping into a neighboring pair. When this interference is measured at the near end—the same end where the transmitter is located—we call it near-end crosstalk (NEXT). This metric focuses on how much the signal on one pair shows up on an adjacent pair right at the transmitter end, which is a key concern for maintaining signal integrity in the first portion of the cable run.

This differs from far-end crosstalk (FEXT), which is observed at the far end of the cable, and from the general term crosstalk, which describes the phenomenon itself without specifying where the measurement is taken. ACR, Attenuation-to-Crosstalk Ratio, is a related performance figure that combines attenuation and crosstalk but is not the term for the interference amount itself.

So the measure described is near-end crosstalk.