On This Day in Telephone History June 26TH 1878 First Bell Telephone Exchange in Illinois, the Chicago Telephonic Exchange, opened at 125 LaSalle St. in Chicago

On This Day in Telephone History June 26TH 1878

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On This Day in Telephone History June 26TH 1878 First Bell Telephone Exchange in Illinois,

the Chicago Telephonic Exchange, opened at 125 LaSalle St. in Chicago

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