The Door Access Control Service provides perimeter security for exterior entrances, although, depending on the need, interior doors may also be protected for high value or sensitive locations. The system may be accessed by several means, including proximity cards or key fobs, swipe cards, bar codes, or biometric readers. The system is protected from power outages by battery backup. In the event of a power failure, all doors will be “fail closed” to maintain security. There is the provision for student ID cards to be incorporated into the security door system, if appropriate.