I know this is not "audiophile" glass but there are many datacommunications businesses which terminate single-mode and multi-mode fiber with ST connectors.
Toslink vs. RCA
In virtually every review of DACs and jitter reduction devices, RCA seems to be better than TOSLINK for the transmission of S/PDIF. This seems strange to me considering that a whole host of nasties like EMI and transmission line effects can be eliminated with optical transmission. Does anyone know why RCA is better?