Holdup alarms are alarms that require a person under duress to covertly trigger the alarm to summon the proper authorities. These types of alarms are most commonly found in retail establishments and financial institutions, but are sometimes an integrated feature of home burglar alarms. The trigger could be a push button, electronic money clip, a foot rail, or a number of other things. Either the person under duress or a witness can activate this kind of alarm. For example if someone is ambushed outside of their home and told to disable their alarm system they can possibly enter a special duress code that is different from their normal deactivation code to notify authorities without arousing suspicion. These alarms are almost always silent and usually require a manual reset with a key or a special code.
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Famous quotes containing the word alarms:
“And we are here as on a darkling plain
Swept with confused alarms of struggle and flight,
Where ignorant armies clash by night.”
—Matthew Arnold (1822–1888)