Titles interspersed, short film explaining the history on the early American telephone system. Shows statistics of growth of the telephone system and early construction of telephone lines then motor power being used to lay aerial and underground cables, Stills of Dr. Bell at official opening of telephone lines linking various cities. Laying cables in Florida. Submarine cable being laid off a Cuban shore, of opening ceremony with President Harding. Shots of modern telephone trucks laying cables. Opening of the storm proof long distance cable, connecting Chicago to New York August 11, 1925, shots of final splice of cable being made. Stills of architecture of modern telephone buildings. Shows modern switchboards in operation.