What is one of the three basic systems used in public safety communications?

The selection of telephone systems as one of the three basic systems used in public safety communications is accurate because telephone systems serve as a vital tool for emergency response and communications among public safety agencies. These systems allow for direct communication between the public and emergency services, facilitating quick reporting of incidents and requests for assistance. Additionally, telephone systems are crucial for inter-agency communication, enabling different departments to coordinate and share information in real-time during emergencies. Their reliability and widespread accessibility ensure that they remain a fundamental part of the public safety infrastructure.

While television systems, internet systems, and social media platforms can be useful for communication and information dissemination, they do not provide the direct, immediate line of communication that telephone systems do, particularly in critical and urgent situations.