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Title: The Book Tells of The Most Fatal Flaw in Security
Review: I read the other reveiws and wanted to leave one also. If one reads the book it tells of the single most vulnerable part of any security system. It is easily circumvented from the exterior of the building. If the communications link goes down then it's over. The system becomes useless and will not summon the police. After reading the book I have corrected the problem and can't believe the company never told me about the flaw. Apparently they almost all have it. Must back up the communication link for assured response. Glad I bought the book.
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