My mom worked as an operator for Southern Bell (now BellSouth) in 1944 & 1945. This was in Hattiesburg, MS, and she worked both the local and long distance boards. I remember her saying that even though all calls went through an operator, that her L.D. switchboard had a dial on it. This was used to dial calls to certain areas.
She went back to work for Bell in Hattiesburg in the early 50's when my dad was away for the Korean War. However, this time she was not an operator, but rather worked in an office for Western Electric. They were installing a new phone system there that was one of the first areas to have "intertoll" dialing, where customers could dial local and many long distance calls.
I kept in touch with one of her former co-workers she knew from the 40's until the lady passed away last October. Marguerite was 92, and lived about 30 miles from here.