Which of the following statements is TRUE about any type of call coming in?

The correct statement about incoming calls is that they can come in on any line at any time. This reflects the nature of telecommunications systems, where calls can be received through various types of phone lines, such as landlines, cells, and VoIP systems, and not limited to specific emergency lines or hours.

In many emergency response scenarios, calls are received from multiple sources, emphasizing the need for a robust system that can handle calls at any time. This situation allows for effective response to incidents as they occur, regardless of the infrastructure in place at a given moment.

Understanding this concept is crucial for ensuring that response teams remain prepared for incoming communications, which may include emergencies, requests for information, and other critical incidents needing attention.