On This Day in Telephone History, February 17TH 1878, San Francisco Became the third City in the World to Open a Telephone Exchange. Telephone demand gained momentum and San Francisco became the third city in the world to open a telephone exchange. This exchange was operated by the Western Union Company and the American Speaking Telephone Company provided Edison model telephones for subscribers.

On This Day in Telephone History February 17TH 1878

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On This Day in Telephone History, February 17TH 1878, San Francisco Became the Third City in the World to Open a Telephone Exchange. Telephone demand gained momentum and San Francisco became the third city in the world to open a telephone exchange. This exchange was operated by the Western Union Company and the American Speaking Telephone Company provided Edison model telephones for subscribers.