On This Day in Telephone History April 15TH 1956 San Diego, CA became first large city where all customers could dial their own calls to millions of other telephones in metropolitan areas from coast to coast.

On This Day in Telephone History April 15TH 1956

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On This Day in Telephone History April 15, 1956, San Diego, CA became first large city where all customers could dial their own calls to millions of other telephones in metropolitan areas from coast to coast.

PRIOR TO DIRECT DISTANCE DIALING LONG DISTANCE TELEPHONE CALLS WERE PLACED THROUGH A LONG DISTANCE OPERATOR