Commercial Cellular Fire Alarm Communicator A commercial cellular fire alarm communicator is a device that automatically contacts your local fire station to alert them to a fire in your building or place of business. They are usually mounted to a wall or ceiling inside your building, and they alert first responders when a smoke or fire alarm is triggered. How a Commercial Cellular Fire Alarm Communicator Works A commercial cellular fire alarm communicator first receives a signal from inside your building that a fire or fire-related smoke has been detected. The communicator then automatically contacts your local fire station to let them know about the issue. This communication is done via a cellular signal, similar to how cell phones send and receive voice data. It’s clear that this kind of communicator is essential for 24-hour protection from fires in your business