This is the older, simpler setup. Detectors are grouped into zones (like floors or sections of a building). When one detector in a zone is triggered, the panel tells you which zone has a problem, but not the exact device.

                        Addressable Smoke Detection
Here, every detector has its own unique address. When one activates, the system tells you exactly which device and location triggered the alarm. It also allows for advanced features like sensitivity adjustment, fault monitoring, and smarter diagnostics.