Telephone circuits were originally made of copper. Which of the following has replaced much of the copper circuitry that connected telephone switching stations over long distances?
A)fiberoptic cables
B)reinforced plastics
C)superconductors
D)tungsten wires

Question

Quizplus · Accepted Answer

Fiberoptic cables have largely replaced copper circuitry in telephone systems for long-distance connections due to their higher bandwidth and lower signal degradation over long distances.

Telephone Circuits Were Originally Made of Copper