1892 - the first long distance telephone line between New York and Chicago was officially opened
There were actually 2 long distance calls, both placed by Bell, before that. The first was on August 10, 1876, between Branford, Ontario, to Paris, Ontario. The second was on February 12, 1877, from Salem, Mass. to Boston, Mass.
The first phone call was Bell summoning his assistant, Thomas Watson who was in another room, to his laboratory. The first words ever transmitted were during that call: "Mr. Watson, come here - I want to see you."
From room to room, from town to town, from city to city, from state to state in less than 15 years.

