alarm system
Alarms installed protected area
2010-01-14 00:59:45
Alarms should be installed inside the protected area, but not for external sirens and other devices that have been specially designed to work outside the protected zone. All devices outside the protected area must have adequate security. In addition, the wiring of such a system should be constructed in such a way as to sabotage or accidental disruption system was difficult or impossible.
Every professional alarm system should have a minimum of two sounders for local alarm signaling. In particular, external sirens should be combined with a separate headquarters, regardless of
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