ACCESS CONTROL SYSTEMS
In physical security, the term access control refers to the practice of restricting entrance to a property,
a building, or a room to authorised persons. Physical access control can be achieved by a human (a guard,
bouncer, or receptionist), through mechanical means such as locks and keys, or through technological means such
as access control systems like the Access control vestibule.
Electronic access control uses computers to solve the limitations of mechanical locks and keys. A wide range of
credentials can be used to replace mechanical keys. The electronic access control system grants access based on
the credential presented. When access is granted, the door is unlocked for a predetermined time and the
transaction is recorded. When access is refused, the door remains locked and the attempted access is recorded.
The system will also monitor the door and alarm if the door is forced open or held open too long after being unlocked.