Final answer:
After operating an emergency alarm box, the trackman should immediately use the emergency telephone to speak with the signalman, who is equipped to manage train movements and ensure safety on the railway network.
Step-by-step explanation:
The question pertains to the procedures that should be followed by a trackman after operating an emergency alarm box. Specifically, it asks whom the trackman should communicate with using the emergency telephone. This is a scenario that would be familiar to those who have knowledge of railway operations and safety protocols.
Based on standard railway emergency procedures, after operating an emergency alarm box, the trackman should immediately use the emergency telephone to speak to the signalman. The signalman is responsible for controlling the movement of trains on the railway network and can take appropriate safety actions, such as stopping trains and rerouting them if necessary.
This ensures that any potential dangers on or near the tracks can be managed promptly to protect both the staff working on the railways and the passengers on the trains. The station master, train driver, and ticket collector, while important roles within the railway industry, are not the correct point of contact in this specific emergency scenario.