What is the meaning of term crosstalk?

Crosstalk is a communication interference and impairment on a communication channel caused by the signal of another channel in communication. Crosstalk can be classified as either near-end crosstalk (NEXT) or far-end crosstalk (FEXT). NEXT occurs when a signal from one transmitting pair of wires interferes with a signal on an adjacent receiving pair of wires at the near end of the transmission line. FEXT occurs when a signal from one transmitting pair of wires interferes with a signal on an adjacent receiving pair of wires at the far end of the transmission line.

Near-end crosstalk (NEXT) is the crosstalk that occurs at the near end of a communication link, i.e., at the transmitting end. It is caused by the electromagnetic coupling between the transmitting and receiving wires. The amount of NEXT depends on the distance between the wires, the frequency of the signal, and the type of cable used.

Far-end crosstalk (FEXT) is the crosstalk that occurs at the far end of a communication link, i.e., at the receiving end. It is caused by the reflections of the transmitted signal from the far end of the cable. The amount of FEXT depends on the length of the cable, the frequency of the signal, and the type of cable used.

Crosstalk can be a significant problem in communication systems, as it can cause errors in data transmission. There are a number of ways to reduce crosstalk, including using shielded cables, twisted pair cables, and balanced lines.