Access Control Systems are designed to work together seamlessly, Access Systems' products provide you with the technology you need to deliver sophisticated security solutions—from the simplest to the most challenging. Our expertise include State-of-the-art access control software that integrates the most advanced security technologies with innovative networking capabilities to bring you full-featured security solutions serving any size facility. The three types of access control are administrative, technical and physical. Access control models include Mandatory Access Control (MAC), Role Based Access Control (RoBAC), Discretionary Access Control (DAC) and Rule-Based Access Control (RuBAC), which define the level of permissions. A building access system is composed of four basic pieces, the Master, the Site Controller, the Entry Control Unit and the User Input Device. These four components are crucial to creating or expanding your building access system.