에이티앤티(AT&T) - Family Plan

A national monopoly

G.W. Brock says in The Telecommunications Industry: The Dynamics Of Market Structure, "[The] provision allowed Bell and the independents to exchange telephones in order to give each other geographical monopolies. So long as only one company served a given geographical area there was little reason to expect price competition to take place." AT&T focused on purchasing companies within specific geographic areas that increased its effective control of the telephone system market, while selling its less-desirable and previously acquired companies to independent buyers. Also included in the Kingsbury Commitment was the requirement that AT&T allow competitors to connect through its phone lines. Economists point out that this reduced the incentive of these companies to build competing long-distance lines.
From http://en.wikipedia.org/wiki/American_Telephone_and_Telegraph