The Emergency Warning Systems can be categorized as either: A Building Occupant Warning Systems (BOWS) A ‘Sound Systems and Intercom Systems for Emergency Purposes’, previously referred to as an Emergency Warning and Intercommunication System (EWIS) An Emergency Warning System will consist of the following: A manual and automatic alarm activation An alert signal, which will include an audible signal or a combination of audible and visible signals (lights/strobes) in areas of high noise. After a pre-determined period of time, the system will automatically switch to an ‘Evacuation’ signal. An evacuation signal, which will include an audible signal, or a combination of audible and visible signals, along with automated voice messages instructing the necessary evacuation procedure. Ability to allow authorized Fire Wardens or emergency responders to take control and broadcast a verbal emergency public address to all or selected areas of the building via the PA loudspeakers. Ability to take manual control of the system if required by authorized Fire Wardens or emergency public responders Ability to communicate to one or more Wardens via the Warden Intercommunication Points – EWIS system only The main point of difference between a Building Occupant Warning Systems and an Emergency Warning and Intercommunication System is the ability to engage in two-way communication via the Warden Intercommunication Points (WIPs). The Building Occupant Warning System does not have this functionality, whereas the Emergency Warning and Intercommunication System does.