Access control system is widely used and it is one of the high-tech and safety equipment,
has become one of the intelligent signs of modern architecture. Access control , the export
and the entrance control system, is to control the export and entrance channel system.
Access control system is developed on the basis of the traditional locks.
Physical Access Control
Physical access by a person may be allowed depending on payment, authorization, etc.
Also there may be one-way traffic of people. These can be enforced by personnel such as
a border guard, a doorman, a ticket checker, etc. or with a device such as a turnstile.
There may be fences to avoid circumventing this access control. An alternative of access control
in the strict sense (physically controlling access itself) is a system of checking authorized presence,
see e.g. Ticket controller (transportation). A variant is exit control, e.g. of a shop (checkout) or a country.
In physical security, the term access control refers to the practice of restricting entrance to a property,
a building, or a room to authorized 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.