Access control is used to limit the movements of unauthorised persons to sensitive or restricted areas of the premises. The most basic part of access control is lock and key, however it is not always convenient to physically unlock a door each time you need to access plus the fact that keys can be easily copied and used. To overcome this, a digital keypad can be fitted and the door released by entering a personal code into the digital keypad. This will also eliminate the use of any physical keys.
The same idea can be used by using a swipe card or proximity fob. More and more companies have started using a PC driven access system, giving managers full computer control over adding or removing users. They can also set different access levels or time slots for different doors. They can also restrict certain areas at certain times.