Access Control Vestibule
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def
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a small enclosed space with two (or more) doors — historically called a "mantrap" — used to control how people pass through a secured area one at a time
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configurations
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all doors normally unlocked — opening one door causes the others to lock
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all doors normally locked — unlocking one door prevents the others from being unlocked
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one door open / other locked — while one door is open, the other cannot be unlocked
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one at a time, controlled groups — managed control of movement through an area
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purpose
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ensures only one authorized person enters at a time, preventing Tailgating and Piggybacking
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related
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Name the 4 configurations of an access control vestivule
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All doors normally unlocked (opening one locks others); all doors normally locked (unlocking one blocks others); one door open/other locked; one at a time, controlled groups
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