The white phone is the actual phone and the other two are connected to the dispatchers towers. One was connected to the Monon tower and the other was connected to the Bainbridge tower. The range on the radio tower at Lafayette is normally between Crawfordsville and Monon. If the operator needed to talk to a train that was farther away he could use these other phones to use the dispatcher towers at either Monon or Bainbridge to increase his raido range. Also if a train crew needed to contact the operator they could hit tone 7 on the road channel and one of these phones would start ringing to let the operator know someone needed to talk to him.
Craig Myers