The light is easily transmitted through fibers or thin rods of glass. The use of fiber in telecommunications is growing because it is durable, reliable, and provides more bandwidth (information-carrying capacity) than traditional metallic-based cable. The use of fiber optics in telecommunications ranges from global networks to local telephone exchanges to Internet subscribers’ homes. All involve the transmission of voice, data, or video over distances from less than a mile to hundreds of miles (see Fiber Optics Primer)
