TOSlink (Fiber Optic)

Also known as TOSlink, fiber optic cables are commonly used to provide digital 5.1 or 7.1 home theater surround from DVD and CD players. Fiber optic cable delivers digital audio via pulses of light and is thus immune to RF interference and electrical noise. However, fiber optic cables can be subject to timing inaccuracies (knows as jitter) if the fiber optic terminations aren't precisely polished.