Access control system being develop base on the technology identify carrier and open door for the carrier. Media use to carry the identity evolve from pin code, barcode, magnetic, touch and go RFID card, finger print, voice recognition, iris recognition, vein recognition face recognition, finger print recognition,palm recognition and etc, some device may use more than 1 identity to get grand to the door. Once the carrier is a valid compare with the controller, the door will open.
How to select a correct access control system for your company, is the access control can use for alarm purpose, why we need an access control for our office, how many staff in your office, do you need the in out transaction for the attendance purpose, do you need to link all your branches together? Few question you should ask yourself before selecting a correct access control system.