에이티앤티(AT&T) - Your World

Company formation and expansion

On December 30, 1899, the American Telephone and Telegraph Company bought the assets of American Bell; this was because Massachusetts corporate laws were very restrictive, and limited capitalization to ten million dollars, forestalling the growth of American Bell itself. With this transfer of assets, AT&T became the parent of the Bell System.
National long distance service reached San Francisco in 1915. Transatlantic services started in 1927 using two-way radio, but the first trans-Atlantic telephone cable did not arrive until 1956, with TAT-1.
From http://en.wikipedia.org/wiki/American_Telephone_and_Telegraph