Alabama, Tennessee and Northern (AT&N) Railroad - Signal System Request

Hello all:

Wonder if someone could provide information on what signaling existed, if any, on the AT&N?

If it was not a "dark" railroad, what type of signals existed?

Thanks very much for any available information.

 

It was a dark railroad operated by timetable and train order (TT-TO).

 

Thanks much for the information, Karl, much appreciated.