Fire Alarm Control Panel 17 : System Functions: (2) Acknowledge: This function, also abbreviated to "ACK", is used to acknowledge an abnormal situation such as an alarm, trouble or supervisory
Wikipedia, The Free Encyclopedia, Glossary of firefighting terms, Wikimedia Foundation, CA, USA 2012. http://en.wikipedia.org/wiki/Glossary_of_firefight ing_terms, (Fr Srvc - Amer) {510}