Ten Laws of Video Monitoring System Installation

Ten Laws of Video Monitoring System Installation

1、 Access Switch Selection of

For more than 8 points (including 8 points above 720P), please use the full gigabit network switch.

The actual bandwidth of our commonly used switches is 50% - 70% of the theoretical value, so the actual bandwidth of a 100M port is 50M-70M. 4M * 12=48M, so it is recommended that a 100M access switch can access 12 720P networks at most video camera 。 At the same time, considering that the current network monitoring adopts the dynamic coding mode, the peak value of the camera code stream may exceed the 4M bandwidth, and considering the bandwidth redundancy design, it is best to control a 100M access switch within 8, and it is recommended to use a gigabit port if more than 8.

Before construction, all network ball machines, network cameras, NVRs, computer master computers, and storage The server The IP addresses of streaming media servers, HD decoders, management servers, etc. should be modified and registered in a unified way. Attention must be paid to avoid IP address conflicts with the original devices (such as computers, network printers) in the local network. The address of all equipment shall be made a draft, and the address of the camera shall also be marked on the drawing for the convenience of after-sales staff.

I The national standard super five class network cable can be used between the PC and the front-end switch, and the national standard six class network cable and six class crystal head must be used between the front-end switch and the main switch in the computer room. Our current projects basically use optical fiber transmission, single mode and multi-mode, free choice. Optical transceiver or optical module, free choice

The national standard super five class network cable can be used between the IPC and the front-end switch, and the six class network cable is gradually applied to the security system.

We must choose a big brand full gigabit switch, and we must not work with full load. For example, when 24 port full gigabit switches are actually used, we generally do not use more than 20 ports. Because the amount of network HD monitoring data is large and it is constantly transmitting data, the processing requirements for the switch are high. If there is a delay The problem of stuck can be solved by adding a switch.

As for the core switch with or without routing function, it can be selected according to needs.

The type and number of high-definition webcams can be determined according to different coverage ranges. In a project, the selection of lens is very important, which depends on whether the scope of customers' needs can be fully covered.

The monitoring object determines the viewing range, camera position and required camera type. The monitoring object can be divided into fine view and general view. Fine images are effective for identifying people or specific targets, such as: people's faces, certificates, sales store monitoring; The general observation diagram is mainly used to monitor the whole scene or the general flow of the scene. The monitoring target determines the viewing range, camera position and required camera type.

Because the indoor and outdoor light is different, the sensitivity and lighting effect should be considered. Infrared light can be used in outdoor environment, and some also need to use day and night dual-use surveillance cameras; If it is indoor, it is generally unnecessary to consider so much, as long as the lighting effect is considered. In addition, if you are outdoors, you should also consider the relevant factors of dust prevention, moisture-proof, waterproof and damage prevention. For example, in the dark environment, cameras with low illumination function can be used, in the environment with uneven light distribution, cameras with wide dynamic function can be used, in the bayonet environment, cameras with professional license plate function can be used, in the elevator environment, special cameras for elevators can be used, etc.

Because some places need to install hidden millions of high-definition webcams for some specific reasons. Therefore, in this respect, it is necessary to consider selecting non concealed or concealed surveillance cameras.