Base of one of the towers at the Telefunken Nauen station. Google Books.

The New York Sun, August 3, 1914, reports that the Kaiser has taken control of the two great wireless stations in the German Empire, and that commercial traffic to North America from those stations has now ceased. The station at Nauen, near Potsdam, was the flagship station of the Telefunken system, and had previously been in communication with the Telefunken station at Sayville, Long Island. The station near Hanover was the biggest station of the Goldschmidt System and had communicated with the station at Tuckerton, N.J.

The newspaper noted that if Britain entered the war, which was expected, that the last link with Europe would be cut. Howevver, the Marconi company was rushing to completion work on the station at Stavengar, Norway, which would keep North America linked to Europe.