How must the automatic smoke and fire detection systems be connected?

The connection of automatic smoke and fire detection systems must be electronic to ensure reliability and rapid response in the event of a fire or smoke detection. Electronic connections allow these systems to integrate seamlessly with alarm panels, emergency systems, and other safety measures, facilitating immediate notifications to occupants and emergency responders. This interconnection is critical for maintaining the effectiveness of fire safety systems, as it enables real-time communication and control.

Given that the other options suggest alternative methods, they do not align with the standards and best practices for fire safety systems. Wireless communication may introduce latency or interference risks, a physical connection could slow down installation or hinder system updates, and manual oversight is not feasible for life-safety systems that rely on automation for prompt action. The electronic method is thus the most efficient and robust approach to ensure optimal performance of smoke and fire detection systems.