Depending on the size of the premise , business can be small, large and huge. Smaller commercial properties tend to be more suited to conventional fire alarms, which will consist of detectors and call points that can be activated manually or automatically to raise the alarm. Larger buildings with multiple floors will require at least one fire detector to be placed on every level and in some cases each room. In huge buildings exact location of fire can be found by using addressable fire alarm systems which are programmed so that each device has its own specific location. This can be programmed as required. For example shut down the equipment, activate fire suppression equipment and recall elevators to ground level.   Installations can also be integrated with your existing telephone system by calling the office telephone extension number or by calling a designated office telephone.