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I know ISDN was used for this kind of thing for a good while.
by ikiris 3y ago
I know ISDN was used for this kind of thing for a good while.
- lebuffon 3y agoYes, ISDN was the higher priced product offered by the telcos but ISDN was not available until the 1980s. Radio broadcasting started over 60 years earlier and analogue lines were the only option.