An Analysis of Modular Network Access Control Operation

The access controller is the hardware core of the access control system, and its quality and performance directly affect the stability of the entire access control system. As the core data processing and storage part of the access control system, the access controller bears the rights of card reading and access to set cards in the entire access control system, monitors the status of entrances and exits, records access control events, and links with other systems such as alarm and fire fighting systems. The important function.

As the access control system plays an increasingly important role in the security management of enterprises, the traditional mechanical door lock management can no longer meet the security management of modern enterprises. Its performance is as follows:

Improve security: The management of access rights for graded and time-slots in designated areas shall be restricted, and relevant personnel shall be restricted from entering any important areas at random. According to the position of the staff and the nature of the work, the level of access and the period of time allowed to pass shall be determined. Management of some important areas such as banks The vault and subway control rooms are equipped with a variety of access methods to meet regional requirements for better security and prevent theft.

Improve management efficiency: Through the central management center to understand and set the status of each access point in real time, reduce the cost of personnel patrolling. The system can record events in real time, making it easy for companies to produce various personnel management reports such as attendance and schedules.

Can integrate with other systems: Integrate with the fire, alarm and other systems a unified security platform to achieve accident warning, prevent all kinds of dangers. When the disaster enters the fire, the system can automatically open the gates set in the control area to facilitate the escape of people. In combination with the monitoring system, the access control system can automatically switch the photographic screen and monitor and record the parts that need to be monitored.

Therefore, the stability and performance of the access controller are also receiving more and more attention. Access controller must be able to establish communication with the computer, real-time monitoring of the entrance and exit conditions of each door, and through the access control software installed on the computer to set the card permissions and analysis query access control access records, generate statistical attendance reports; once the communication is interrupted The system can run normally offline. Therefore, a secure, flexible, easily expandable network access controller that can be integrated with other platforms will be the trend for access controllers.

Network access controller data transmission is safer and more stable and can optimize the existing resources of the enterprise. The communication security of the access control system is the core of the access controller. Most of the traditional access controllers use the RS485 bus (half-duplex operation mode), and then connect to the computer through RS485 to RS232 communication. If you need to connect to the network, you need a network converter. In real applications, there is poor real-time and data loss. Other disadvantages. The IP-based networked access controller has a built-in TCP/IP network interface and can be directly built on the user's existing TCP/IP network. The high-speed communication rate can ensure that the device status is transmitted to the central server in real time, and the event record can be uploaded to the computer immediately. It is immediately displayed to prevent the loss and falsification of information. Through the controller's internal interface module and peripheral devices such as card readers, it is easy to install and at the same time, the system can be expanded in time according to customer needs, saving costs.

The VertX network access controller specifically developed for access control applications can be directly deployed on the user's existing TCP/IP network. It not only achieves tamper-proof and vandal-proof in hardware protection, but also uses multiple protection technologies in software. For example, on-site RS485 communication uses encrypted communication to effectively prevent illegal eavesdropping and AES encryption for TCP/IP network communication. The most important access control database in the system must be interpreted and read by dedicated software; the controller has built-in Linux operation. The system not only operates stably, but also is safe and reliable. At the application layer, it not only provides basic security functions such as anti-trailing, anti-return, and anti-stress, but also can provide security extension functions such as double door interlock and linkage with video surveillance.

The VertX system adopts a distributed network architecture that centrally manages distributed control. It not only ensures central processing of information and control, but also limits the scope of faults. Even if some devices fail, it will not lead to normal operation of other parts of the entire system. When the system server is disconnected from the network, the VertX system can also automatically switch to a local independent operation to keep the system running. Moreover, the VertX system is equipped with a line inspection function, and the faulty component is automatically alarmed to reduce the fault reaction time while passing through the dual 485 loop. The design can ensure that when a point of failure occurs in the working loop, it does not affect the stability of the entire system.