Application of toll dialing in Pennsylvania

THE BELL SYSTEM companies have installed elaborate instrumentalities for operator dialing of long-distance calls and have initiated several trials of customers dialing such calls. Under this plan, a connection is established by means of the operator´s or the customer´s dial to any point in the United States without the assistance of intermediate operators. Two of the prerequisites for a successful operation of this nature, a nation-wide numbering plan for the customers´ telephones and a system of switching centers, are discussed from the standpoint of their application in Pennsylvania.