一、System character： Suitable for network and digital monitoring requirements The system adopts the standard TCP/IP protocol and built in LAN, wan and wireless networks. Our digital monitoring sever provides RJ - 45 Ethernet interface, it can directly access to LAN switches or HUB. At the same time, it can set gateway at random, completely support the remote monitoring environment. Through video server compress video signal and using network to transmit control signal, it will save the cost of laying long cable。
Perfect system function The system monitoring center and the hierarchical and separating control center can real-time monitor the front end of multiple local and remote monitoring, different users can assign a different position according to the control permissions. The site image can be divided into monitoring team according to the location and display in 4-split or 9-split screen。
Using acting mechanism to save bandwidth resources In the wide-area bandwidth limited environment, the system provides access mechanism, namely when multiple users access to certain channel image, the image will transmit to the request user by by the centre, so it saves the wan bandwidth resources。
Remote system maintenance and management The ML center management server provides access WEB access function. The administrator can modify the various parameters of equipment and improve the equipment maintenance efficiency, he does not need to the equipment site。
Good expansibility The system front end adopt ML modularized digital monitoring server. Users only need to expand the compressed module when expand the system. In the monitoring center, the management personnel only need add the increased monitoring site into the monitoring spot and join it to finish the system upgrade work. User can use the browser IE5 or client control and microcomputer to monitor site environment at anytime。
二、System function: In some cities, there are many large-scale cyber cafes. The superior departments in order to realize the centralized management of the DVR monitoring system, use digital video recorder monitoring system, through the powerful network function of DVR system, they can easily master and manage the condition of every cyber café。
Every cyber cafe Every cyber cafe is installed DVR mainframe computers as the main back-end monitoring devices, the front end cameras choose 420-480 lines color or black and white camera. Because most cyber cafes are medium size, main monitoring spot is access, computer area, cash register, monitor position relatively concentrated, so generally use 4-8 DVR products。
Management department Set data servers and multimedia computer in the management department. The center data sever is responsible for collecting data. The multimedia computers are used for check the business process. Through inputting the host's IP address or DNS domain of every cyber café’s monitoring mainframe in the Internet IE address bar, you can real-time control the cyber café。
三、System composition: The front-end cyber cafe The main configuration in the front-end cyber cafe is cameras, monitor head, speakers, alarm buttons, network audio encoders and local monitor display screen。
Set camera according to the size of the cyber café. Generally, install a fixed camera in the gate of cyber café to monitor the people flow and prevent minors coming into the cyber cafes. Users can watch the computer screen clearly through control the camera lens. Each cyber cafe hall will be installed a monitoring head and a loudspeaker. When meets an emergency, it will monitor and broadcast the situation. The alarming buttons is installed in the cashier. When meets an emergency, the workers can alarm by using the alarming buttons。
The server Install server software, including DVR database system. The server will manage and maintain all the front-end monitoring equipment. At the same time, it realizes empowered management to all clients in the Internet. All users can log on to the server system by any computer in LAN. It also can perform monitoring, video file query, replay, etc. according to different permissions。
The server is installed in the public network. It must have a fixed public network IP to responsible for the management of the network audio/video encoder and the web users. At the same time, the server is responsible for giving authorities to users whether to remotely control the camera lens and playback recording data of the cyber cafes。
The monitoring center The monitoring center is namely the function supervision departments, including cultural auditing departments, public security departments, chain cyber café owner and other relevant network users. The functional supervision departments are connected to INTERNET, install the related software and plug-in in computer. The client computer accesses the server firstly, and after access permissions, will can access the coder of the front-end of cyber café and realize the corresponding function。
四、Monitoring structure diagram 
