TOSLINK Digital Optical Audio (EIAJ optical)
TOSLINK is a standardized optical fiber connection system, also known generically as an "optical audio cable". Common in consumer audio equipment (via a "digital optical" socket), where it carries a digital audio stream from 'player' components to an AV receiver.
There is also a smaller 3.5mm Mini-TOSLInk, which is common in some of the newer Mac's and small portable digital players.
Cable: Optical Fiber, Max: ~10M (33ft)
Pins: 1, Connnector (JIS F05)
Width: 32bit Audio, 3.1Mbit/s to 125Mbit/s