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:
“Every disastrous accident alarms us, and sets us on enquiries concerning the principles whence it arose: Apprehensions spring up with regard to futurity: And the mind, sunk into diffidence, terror, and melancholy, has recourse to every method of appeasing those secret intelligent powers, on whom our fortune is supposed entirely to depend.”
—David Hume (17111776)