Yuncheng attendance office quotes, office attendance, Shanxi Century Dragon Technology

 Access Control System Communication category 1. Stand-alone control type: These products are the most common for small systems with a centralized location or install the unit. Usually RS485 communication. The advantage is that the investment is small, dedicated communication lines. The disadvantage is that once installed, you can not easily change the location of the management center, not easy to achieve network control and remote control. 2. Network type: the technical content of such products is high, is still rare, only a handful of the company's products molding. It uses a communication network commonly used TCP / IP protocol. Advantages of such a system is the controller and data management center is to pass through the LAN, the management center location can change at any time, without re-wiring, it is easy to implement network control or remote control. For large systems or install geographically dispersed units. Disadvantages of these systems is stable communication part of the system need to rely on the stability of the local area network. Shanxi Century Dragon Technology attendance development process is the first generation of plug-in attendance, the 1970s, gradually replaced the manual records and attendance, he is on the cards made of a metal marked with regular holes, and then use a light sensor and projection the difference between the number of people, 8086, or 80286 processor. But the metal piece is easily deformed, resulting in the identification of errors. Coupled with the resolution limit how much money Changzhi office attendance, such attendance does not popularized in the hundreds of thousands of people in the coal mines. The second generation barcode attendance, use of optics in a miner's light beam in the projection. Attendance like a bar code, the workers go down before irradiation with miner attendance at a special probe can be attendance. This quick and easy way to go down with the earliest is such attendance. But, after all, is a miner often work in harsh environments instruments, so frequent maintenance, projection aliasing is a problem everyone scrambling bundle .. The third generation of the magnetic type attendance, attendance is now the most common jiexiu office attendance machine manufacturers, such as coal miners go down on credit card credit card has become well accustomed to the fourth generation of our knowledge of the biological identity of attendance office Luliang attendance prices, is the use of biometrics to identify a person, such attendance as long as a person's finger, hand hold, put a face on the head or face reading can be identified very easily and can prevent pinch card phenomenon, improve management System Five is the camera attendance, photographs attendance office attendance, effective solution to the biometric restrictions on the use of the environment and people, smart card management and labor management, and can be effectively adapted to the factories, industrial and mining environments. Yuncheng attendance office quotes, office attendance, Shanxi Century Dragon Technology provided by the Shanxi Century Technology Co., LTD. Shanxi Century Technology Co., LTD (www.sxsjlkj.com) strong, credible, in Taiyuan, Shanxi attendance machine industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the century-long into the brilliant technology and you work for a better future!