Emergency Warning Intercom System or EWIS as they are more commonly known are generally installed in conjunction with a fire alarm system when required. They can also be installed as a standalone emergency and evacuation system.

They are an audible alarm and intercom system designed to alert the occupants of a building that there is pending danger. They can be manually triggered or activated by a fire alarm system.

An EWIS can also be used for paging and background music throughout a building and will sound a warning and evacuation tone when triggered for an emergency.

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