This Toslink (Toshiba Link) is the standard for fiber optic audio connections. It carries a digital audio signal from CD, DVD, Blu-ray, satellite box, cable box and computers to AV receivers for multi-channel surround sound reproduction. 

Fiber optic cable can faithfully send data without fear of traditional interferences that are typical in a copper-based medium. Virtually unaffected by electromagnetic and radio frequency interference, this cable reliable transfers a lossless signal for your entertainment. This connection is also known as: optical audio cable; digital optical; fiber optic audio and S/PDIF.