370
The first phone call
Now it seems obvious: the phone must call to inform others that it is calling. But the AG Bell, inventor of the telephone, it did not occur, so the only way to take a call from the telephone of its construction was expected to pick up the phone and call.
Simple and obvious modifications to the phone made an Assistant Bell, Thomas Watson. He guessed to attach the device to the unit, an alarm call at the time, and became the first person in history to answer the phone.
via factroom.ru
