A professional who operates telegraph key, Teletype machine, or talks over telephone to transmit and receive train orders and messages. Respnsibilities include:

• Records time and date messages were received or transmitted.
• Operates Teletype machine to transmit messages and train orders.
• Reads messages received and marks for distribution.
• Informs train dispatcher by telephone of departure of outbound trains from yard or terminal.
• Replaces rolls of Teletype paper in machine as required.