Barbed-wire telephone network

Image: Barbed wire, via Wikipedia]. One more radio-related link comes via @doingitwrong, who mentions the use of barbed-wire fences as a kind of primitive telephone network. "Across much of the west," C.F. Eckhardt explains, "...there was already a network of wire covering most of the country, in the form of barbed-wire fences.

Jonathan Puckey
Source: Fence Phone