What Are Interlinked Smoke Alarms? Interlinked smoke alarms are designed to keep your whole home protected - not just the room where the fire starts. When one alarm detects smoke, they all sound, giving you and your family the best possible chance to respond quickly. In this video, we explain what interlinked alarms are, how they work, and why they’re becoming an essential part of home fire safety. Whether you’re a homeowner, landlord, or electrician, it’s important to understand how these syste