A hundred years ago, it became possible for the first time to make a telephone call from coast to coast. The September 1914 issue of Popular Mechanics reports that the line from Denver to San Francisco had been completed on June 17, 1914. On that date, crews working westward from Salt Lake City and eastward from San Francisco met at the Nevada-Utah state line. The lines were spliced together at a pole erected on the state line and “the last splice was accompanied by a ceremony much like that of driving the last spike on a transcontinental railway.”

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