The purpose of any alarm system is to alert someone to an immediate danger, such as a fire, holdup, or burglary. ... While burglar alarm circuits are normally active only during non-business hours, holdup and shoplifting circuits are activeanbsp;...
|Title||:||Catalog of security equipment|
|Author||:||John V. Fechter, Elizabeth Robertson, Law Enforcement Standards Laboratory, National Institute of Law Enforcement and Criminal Justice|