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In recent years, the market share of network cameras with POE interfaces has been growing at a high rate. The opening of the 2008 Beijing Olympic Games and the 2010 Shanghai World Expo, as well as the gradual deepening of the construction of the "Safe City", will have a more prominent position in the market for network cameras. The higher is. According to statistics, the network camera market has grown geometrically from 2005 to 2009, and by June 2010, it has increased by several dozen times. At present, network cameras only account for about 3% of the market of cameras. Industry insiders estimate that the market share of network cameras by 2015 is expected to reach 50%. If the number of network cameras increases, the proportion of PoE switches will also increase. In three years, the Chinese PoE market will reach 300 million yuan. Kedi Communication is committed to popularizing the application of PoE products, and has made rapid progress in the case of a rising environment.
The PoE standard products on the network cameras in the security industry are unique. They are easily recognized for ease of installation, simple configuration, simple network structure, and good image quality. Therefore, they have the potential for rapid development and should cause video cameras. People in the industry are highly concerned.
There are three commonly used PoE networking solutions for high-definition network cameras introduced by Keyland Communications: PoE power supply networking solutions, PoE switch networking solutions, and ONU networking solutions with POE functions. The PoE switch solution is the current network monitoring mainstream network solution. However, the network transmission is limited by the distance. The long-distance PoE switch currently has a high cost and has certain requirements on the environment and transmission media. In the light of security monitoring and high-definition video networking requirements, Kedi Communication introduced reverse PoE technology and designed a PoE repeater networking solution that is a million high-definition full-network passive solution, creating a low-cost, high-efficiency, and more flexible and convenient HD surveillance networking solutions.
Advantages of PoE networking applications
1, flexibility, PoE only need to install and support a cable, simple and space-saving, and equipment can be moved freely;
2, cost savings, video surveillance cameras, etc., need to be installed in places where it is difficult to deploy AC power, PoE eliminates the need for expensive power and time to install power, saving cost and time;
3, intelligent power supply, DC power like data transmission, PoE can use a simple network management protocol (SNMP) to monitor and control equipment;
4. Eliminating hidden dangers of power supply security. The PoE power supply device will only supply power to the devices that need power supply. Only the devices that require power supply will be connected, and the voltage will exist in the Ethernet cable, thus eliminating the risk of leakage on the line.
5, centralized power supply advantages, a single UPS can provide all relevant equipment in the power supply when the power is off;
6, equipment compatibility advantages, users can automatically and safely mix the original equipment and PoE devices on the network, these devices can coexist with existing Ethernet cable;
7, to facilitate the management of network equipment, remote equipment connected to the network, remote control, reconfiguration or reset;
8. In wireless LANs, PoE can simplify RF test tasks and access points can be easily moved and accessed.
Monitoring PoE Network Application Benefits
The security industry PoE network mainly has the advantages of simplified wiring, energy saving, flexibility and convenience.
First, in addition to providing universal power supply support for connected devices, PoE networking reduces the total deployment cost of integrating power devices into a unified IP infrastructure. The POE module eliminates the need to install a wall power connection for the terminal equipment, thereby reducing the cost of the power outlet associated with supporting the terminal equipment.
Second, the need to install wall power connections reduces the cost of power outlets associated with supporting terminal equipment.
Third, installing network connection equipment in places where it is difficult to deploy local AC power supplies provides greater flexibility. PoE network cameras have the function of supporting power identification circuits. When using UPS power supply, the advantages of energy saving are more obvious.
Fourthly, when an intrusion occurs, it can prevent the surveillance camera from working due to a short circuit. The PoE technology uninterruptible power system (UPS) is much more secure. In the event of a large-scale power failure, it can guarantee a higher level of security. Long-term security protection. During the wiring process, interference between signals can be reduced. In addition to cameras, thanks to PoE technology, access control systems, radio frequency identification tracking (RFID), biometrics, fire detectors, and other safety equipment markets are constantly expanding. Many access control equipment providers now offer a variety of PoE-based recognizers, controllers, and quick response locks.
PoE product technical analysis
A complete PoE system includes two parts: a power supply device PSE and a power receiving device PD. The PSE device is a device that provides power for Ethernet client devices and is also the manager of the entire PoE Ethernet power supply process. The PD device is a PSE load that receives power, that is, a PoE system client device. Two power supply methods of PoE: Mid-Span adopts 4/5 and 7/8 pairs to transmit DC power, that is, to use a free wire pair that is not used in an Ethernet cable to transmit DC power, and the PSE of the corresponding endpoint. Supports PoE-enabled Ethernet switches; End-Span adopts 1/2 and 3/6 pairs to transmit DC power, that is, to transmit DC power at the same time as the core wire used for data transmission. The transmission uses Ethernet data signals. Different frequencies.
PoE relay technology
The PoE repeater adopts the reverse PoE technology based on the original PoE power supply switch, so that the original PoE switch not only has the power supply function, but also has the power-on function of the uplink port, so that the PoE repeater product can be transmitted again without external power supply. Data, which functions as a PoE signal to extend the transmission. The LS104P and LS102P-at products adopt the high-power PoE technology for their uplink power receivers. The PoE receives 60 W of power, fully meeting the power requirements of four IEEE802.3af standard power ports and two IEEE 802.3at standard power ports.
PoE million HD network-wide passive network solution analysis
The PoE repeater is a three-part solution consisting of a central office room, a relay section, and a monitoring point. The central equipment room maintains the original equipment networking interface, and only needs to add a PoE single-port power supply; the relay part is the core equipment part of the solution and the PoE repeater. In this solution, a one-to-one PoE repeater is used, and the PoE power supply is remote. 100 meters input, output 100 meters from the PoE repeater to supply power to the PoE camera; no external power is required at the monitoring point, and a PoE network HD camera is used. The solution is a traditional PoE repeater application solution, which solves the problem of insufficient network transmission distance and insufficient transmission bandwidth for long-distance PoE switches.
One-to-Two Network Analysis of PoE Repeaters
The PoE repeater one-to-two networking scheme consists of three parts: the center room, the relay part, and the monitoring point. The central equipment room maintains the original equipment networking interface, and only PoE single-port power supply is needed; the relay part is the core equipment part of the solution and the PoE repeater. One to two PoE repeaters are used in the solution, and the PoE power supply is remote. 100 meters input, 100 meters from the PoE repeater to power the two PoE cameras; no external power is required for the monitoring point, and PoE network HD cameras are used. This solution breaks through the traditional PoE repeater application solution and not only solves the problem of insufficient network transmission distance, but also adopts the problem of insufficient transmission bandwidth for long-distance PoE switches. At the same time, each PoE repeater can be used to save 100 meters of cable transmission media, which further saves engineering costs.
One-to-four network analysis of PoE repeaters
One-to-four networking schemes for PoE repeaters consist of three parts: the central engine room, relays, and monitoring points. The central equipment room maintains the original equipment networking interface, and only needs to add a PoE single-port power supply; the relay part is the core equipment part of the solution and the PoE repeater. In this solution, a one-four-PoE repeater is used, and the PoE power supply is remote. 100 meters input, output 100 meters from the PoE repeater to supply power to four PoE cameras; no external power is required at the monitoring point, and a PoE network HD camera is used. This solution breaks through the traditional PoE repeater application solution and not only solves the problem of insufficient network transmission distance, but also adopts the problem of insufficient transmission bandwidth for long-distance PoE switches. At the same time, a PoE repeater can be used to save 300 meters of cable transmission media, which further saves engineering costs.
Million HD Monitoring Network Passive Solution Value
1. Reasonable layout, simple structure, easy maintenance, and maximum cost saving;
2. PoE relay is used to connect the monitoring point directly to the monitoring center within 200 meters. It is unnecessary to lay optical cables at a long distance, no need to increase nodes, and the investment cost is low;
3, millions of high-definition bandwidth requirements, the program provides more than 25M bandwidth per channel, fully meet the high-definition monitoring of the bandwidth requirements;
4. The network power supply does not need to lay the power supply, the network is convenient, save the engineering time;
5. One to two repeaters and one trailer and four repeaters are used. In addition to the general cable savings, network cables are further saved, which further reduces the cost of networking.
6. Passive networking, unconstrained by the location of the power supply, flexible networking, can freely change the topology of the network, convenient retrofit;
7. The PoE repeater networking solution can be combined with PoE power supplies and PoE power supply switches to create a more flexible and flexible network-wide passive solution.
Million HD surveillance network-wide passive network
Network background requirement analysis
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