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Weak electrical engineering network video surveillance system networking and grounding requirements
How to network network video surveillance system? How is the network architecture system composed? These are the capabilities that people in the security monitoring industry must possess. In order to let everyone know more about it, please organize some relevant information and share with you.
First, the network monitoring system transmission method
The network HD transmission monitoring system mainly has the following transmission methods:
1. Short-distance network cable transmission: network cable network switch;
2. Medium and long distance optical fiber transmission: optical transceiver network switch network cable;
3. Medium and long coaxial transmission: coaxial cable (twisted pair, power line), network coaxial transmitter;
4, short-distance power transmission: transmission under a meter, through the power cat equipment transmission network;
5. Hybrid transmission system: The camera integrates network cable, coaxial cable, twisted pair cable and power line transmission module, and can transmit HD in any way.
6. Medium-distance optical fiber EPON transmission: epon optical interface network camera ONU equipment optical splitter and other equipment;
7, wireless AP transmission: in the transmission line that can not be wired, inconvenient wiring, wireless AP mode to transmit high-definition, elevator monitoring, field remote monitoring and other special occasions;
Second, network architecture design
The simple video surveillance system is relatively simple, mainly based on video image storage, preview and playback functions. The number of monitoring points is about hundreds of channels.
The architecture adopts a two-layer architecture, with a 100M switch as the access layer to implement front-end IPC access, and a 1000M link to access the 1000M aggregation switch. The video integrated host serves as the core of the aggregation layer video exchange.
Third, a large-scale network architecture
Large-scale video surveillance systems have a large number of front-end monitoring points, complex access modes, and high bandwidth requirements for monitoring network video streams. Generally, video surveillance private networks need to be built. The system can adopt the following architecture modes:
Fourth, the core deployment
The deployment of core equipment should meet the application needs of multi-service and high-load processing of video surveillance private network, and ensure the stability and reliability of the network core.
Five, functional partition
The video surveillance system has a large number of network devices. According to the characteristics of the video and data services, the network device is partitioned and managed, and can form a storage device access zone, an application server access zone, a front-end IP device access zone, and a management access zone. Etc., the switches in each functional area access the core switch through the Gigabit or 10 Gigabit interface.
Sixth, network security
The video surveillance system should be a component video surveillance private network. The private network is safely isolated from other service networks and the Internet. Network security devices such as firewalls and video isolation gatekeepers can be used to defend against viruses and illegal intrusions from external networks.
Seven, network management
The network management system adopts the common standard network management protocol-Simple Network Management Protocol (SNMP) to realize the management of all network devices and servers in the video surveillance private network.