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Publisher Summary This chapter discusses the designing of security alarm systems for libraries, museums, and art facilities. Alarm systems usually concentrate on protecting the building from unauthorized entry after visiting hours, and very little emphasis is placed on protecting works of art during visiting hours. Museums require reliable protection in five major areas: (1) object protection, (2) building security, (3) surveillance, (4) access control, and (5) reputation. A properly designed and periodically upgraded alarm system can help in all five areas. Much emphasis is placed upon the selection of an appropriate sensor for an alarm device; however, many false alarms are actually due to the improper selection of transmission media. Installing a sophisticated type of sensor is a waste of money unless it is accompanied by a transmission system that is just as reliable. From a security standpoint, the transmission of an alarm signal to a location remote from the protected museum is infinitely more desirable than any local alarm system. Some of the techniques for transmitting the alarm signal to a remote monitoring system require elaborate computerized panels at central control stations; others require only a standard phone line in police headquarters. There are five primary communications/transmission systems in use today of which four require telephone links: tape dialers, digital communicators or dialers, dedicated/leased direct wire phone lines, McCulloh loop and multiplexing networks, and radio transmission, specifically frequency modulation. |
