Optical cables for audio, also known as TOSLINK or fiber optic cables, transmit digital audio signals using light pulses. A fiber-optic cable, also known as an optical-fiber cable, is an assembly similar to an electrical cable but containing one or more optical fibers that are used to carry. Wondering what optical audio cables are and how they work? Learn here about the advantages of these cables and how they compare to other types of audio cables. You've likely used HDMI cables to connect home or office media devices, but what is an optical audio cable? This alternate method of. TOSLINK (Toshiba Link) is a standardized optical fiber connector system.