TOSLINK Optical Fibre Overall Diameter 5mm Black and Metallic Finish TOSLINK or Optical Cable is a fiber optic connection system. Most commonly used with audio equipment (via a "digital optical" socket,) where it carries a digital audio stream from devices such as CD, DVD, Blu-Ray players, Amp to Soundbar and modern game consoles, to an AV receiver such as surround sound system that can decode the stream of audio and output it through a set of loudspeakers. Since TOSLINK uses fibre-optic cable, it is free from distortion caused by electrical or magnetic interference that an electrical cable would incur.
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