How were calls received on sound-powered phones used in foxholes during World War II? I've read that with these types of phone used on ships, you hear a buzzing when you're getting a call. But I'm not sure that would be the case on the front lines in a war zone... if battalion headquarters calls soldiers in their foxholes and the phone makes a buzzing or ringing sound, it could potentially give away their positions, I would think. So did they vibrate, or what? Or could the men only make calls from the foxholes, and not receive them at all?
