Bell Telephone Launched a Mobile Phone During the 1940s

“Here comes a trailer truck out on the open highway, miles from the nearest town,” says the narrator of the short film above. Suddenly, it becomes “important for someone to get in touch with the drivers of this outfit. How can it be done?” Any modern-day viewer would respond to this question in the same way: you just call the guys. But Mobile Telephones dates from the nineteen-forties, well before the eponymous devices were in wide use — about four decades, in fact, before even the massive Motorola DynaTAC 8000X came on the market. The idea of calling someone not at home or the office, let alone a trucker on the road, would have seemed the stuff of science fiction.

Yet the engineers at Bell had made it possible, using a system that transmits conversations “partway by radio, partway by telephone lines.” This necessitated “a number of transmitting and receiving stations connected to telephone lines,” installed “at intervals along the highway so that one will always be in range of the moving vehicle.”
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