Automatic switching for nation-wide telephone service

A plan for automatic long-distance switching, which ultimately will embrace the whole of the United States and extend into Canada and perhaps Mexico, has been formulated and important steps have been taken toward its realization. The plan also contemplates that telephone customers will be able to dial longdistance calls themselves.

[1]  O. A. Friend Automatic ticketing of telephone calls , 1944, Electrical Engineering.

[2]  John Meszar Fundamentals of the automatic telephone message accounting system , 1950, Transactions of the American Institute of Electrical Engineers.

[3]  F. J. Scudder,et al.  Crossbar dial telephone switching system , 1939, Electrical Engineering.

[4]  H. S. Osborne A General Switching Plan for Telephone Toll Service , 1930 .

[5]  F. A. Korn,et al.  The number 5 crossbar dial telephone switching system , 1950, Transactions of the American Institute of Electrical Engineers.

[6]  L. G. Abraham,et al.  Crossbar Toll Switching System , 1944, Transactions of the American Institute of Electrical Engineers.