Telephone signal crosstalk was a more common problem before telephone companies used fiber-optic cables and other well-shielded wires.

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Telephone signal crosstalk occurs when signals from two or more different telephone lines interfere with each other, causing distortion or noise on the line. This was more common before the use of fiber-optic cables and well-shielded wires, which help to prevent crosstalk by reducing electromagnetic interference.

Telephone Signal Crosstalk Was a More Common Problem Before Telephone