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Yes, 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 a
by lebuffon 3y ago
Yes, 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.