[wsh]

I liked An Answer for Linda (1961), which shows the work of outward toll operators using mark-sensing call tickets at traditional (3CL) cord switchboards. “Watch Billie closely, as she handles a group of typical calls.”

(I won’t spoil the Answer; you’ll have to watch for yourself.)

https://archive.org/details/GjEpnTcLgq1eTUR90yMhdcJMvFmMuw

https://www.youtube.com/watch?v=vq1zu4fJaO0