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However, if the card readers communicate with a central system, it is the system that unlocks the door, not the card reader alone. [3] This allows for more control over the locks; for example, a specific card may only work on certain days of the week or time of day. Which locks can be opened by a card can be changed at any time.
A wooden turnstile for keeping livestock penned in (Zwierzyniec, Poland).A circa-1930 turnstile and kiosk at the Bath Recreation Ground. Turnstiles were originally used, like other forms of stile, to allow human beings to pass while keeping sheep or other livestock penned in. [citation needed] The use of turnstiles in most modern applications has been credited to Clarence Saunders, who used ...
Entry points may be doors, turnstiles, parking gates or other barriers. Access badges use various technologies to identify the holder of the badge to an access control system. The most common technologies are magnetic stripe, proximity, barcode, smart cards and various biometric devices. The magnetic stripe ID card was invented by Forrest Parry ...
Optical turnstiles are usually a part of an access control system, which also consists of software, card readers, and controllers. Optical turnstiles operate much like regular mechanical turnstiles , except that they rely primarily on electronic ( infrared ) beams, and audible/visual interfaces to control entry.
A proximity card controlled turnstile A passive proximity card with the plastic casing opened to show components: antenna coil and integrated circuit (black object bottom center) Anatomy of proximity card: coil and IC The proximity card coil of an electronic fare collection system. A proximity card or prox card [1] also known as a key card or ...
A metal doorframe with a strike plate built in: in other doors this would be a metal strikeplate in a wooden doorframe. The term door security or door security gate may refer to any of a range of measures used to strengthen doors against door breaching, ram-raiding and lock picking, and prevent crimes such as burglary and home invasions. Door ...
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