The standard lock and key is a form of access control, but door access control systems have become sophisticated with time. Today, apartment building door entry systems are computer-based where all doors are managed from a central location. These keyless access control systems use special access cards instead of a brass key to allow access into or out of a room. When the wireless door entry systems are connected the right way, the system runs swift with the security manager or the homeowner being able to restrict or grant access to different parties.

Keyless door entry systems can be used to control access into given rooms in a building – access can be given to specific electronic cards and not to others. In its basicity, door entry systems provide quick access to people with authorization and restrict access to unauthorized personnel.