Trainphone was the Pennsylvania Railroad's system for voice communication between crews on moving trains, dispatchers, and tower operators. It was also...

him out of the way of the engineer and fireman. Many had railing-like trainphone antennas added during the 1940s. As dieselization progressed, the M1 locomotives...

proceeded with this modification. Also not generally fitted was the PRR's trainphone system, although early installations were tested on at least one L1s....