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Jimmy, thanks for the comment-- check out Calling315.com for more on the very early days of how the T and R got started. It was JJ Carty of AT&T (1900) that dec
by Kovalick 2y ago
Jimmy, thanks for the comment-- check out Calling315.com for more on the very early days of how the T and R got started. It was JJ Carty of AT&T (1900) that decided to use Tip and Ring and not a single wire and earth ground from each home.