Originally Posted by Donnie Eldridge
Actually this is backwards. It's spec limited, not bandwidth limited.
The following is copied from Wikipedia. Though not a definitive source, the information below is consistent across the web. I'm not sure what spec you are referring to, but Toslink, a.k.a. Optical, does have a bandwidth limitation.
Type: Optical digital audio connectorProduction history
Produced: 1983 to presentSpecifications
Hot pluggable: Yes
Audio signal: Digital audio bitstream.
Originally limited to 48 kHz at 20 bits. Extended to support all modern formats, except Dolby Digital Plus, TrueHD and DTS HD audio streams
Width: 32 bit audio packets
Bandwidth: Originally 3.1 Mbit/s;
Now 125 Mbit/s
Max devices: 1
Cable: Fibre optic (10 meters max)
Connector: JIS F05 (JIS C5974-1993 F05)
And by the way ... that extreme light blue you selected for highlighting .. ouch!!! that is hard on the eyes to read