What action should be taken if the desired route cannot be established on a push button machine?

When encountering a situation where the desired route cannot be established on a push button machine, the appropriate action is to retry establishing the route. This approach focuses on troubleshooting the issue without escalating the situation unnecessarily. Often, electronic systems might have temporary glitches or errors that can be resolved simply by making another attempt.

Retrying allows the operator to give the system another chance to process the information correctly. This can be especially important in busy environments where immediate manual intervention might not be necessary or could lead to complications.

In contrast, notifying the supervisor or switching to manual control might disrupt operations and should typically be reserved for situations where repeated attempts fail or where there is a clear indication that further action is needed. Pulling all buttons could result in a significant interruption of service and is usually considered a last resort. By starting with a retry, you prioritize a methodical approach to problem-solving in an operational setting.