PoE (Power over Ethernet) refers to a technology that transmits power through network cables, and uses existing Ethernet networks to transmit data and power to IP terminal equipment (such as IP**, AP, IP cameras, etc.) through network cables at the same time.
With the increasing popularity of Ethernet devices such as network IP**, network** monitoring, and wireless APs, PoE technology, which transmits network and power simultaneously over Ethernet, has become popular.
At present, there are two main types of PoE power supplies on the market, namely PoE switches and PoE injectors (injectors), which have slightly different functions and application scopes. PoE switches are suitable for large-scale power supply needs, while PoE injectors are suitable for small-scale or individual device power supply needs.
This issue summarizes four hot-selling POE power supplies on the market with relatively high reputation, popularity and sales, in no particular order, in alphabetical order.
Power over Ethernet (PoE) works on two main components: Power Sourcing Equipment (PSE) and Powered Device (PD). PSEs are typically network switches or injectors, while PDs can be devices such as IP cameras, VOIP**, or wireless access points.
First, the PSE is responsible for injecting power into the Ethernet cable. When PSE detects that a device connected to its port needs power, it sends a low-voltage signal to the cable to notify the device that it can receive power.
Second, the PD receives the power signal from the PSE on its port and decodes it using a standard called Power over Ethernet. This standard allows PD to extract electricity from the cable and convert it into the appropriate voltage and current required by the device. PD can use both power** and data transmission without the need for additional power lines.
By combining power and data transmission into a single cable, PoE eliminates the need for additional power lines, reducing the complexity and cost of equipment. It also makes it more flexible to install devices away from power outlets, providing greater freedom of deployment.
The H3C single-port PoE power supply consists of two parts, including a power supply module and a power adapter. The power supply module connects the power adapter through the DC interface, and then connects the router (switch) and the powered device (webcam, wireless AP, etc.) to both ends.
H3C's single-port PoE power supply complies with IEEE 802The 3AF AT standard supports 25W output for the corresponding device, supports Gigabit network and is backward compatible.
This Gigabit Ethernet PoE injector is designed with a white strip housing with an AC power outlet at one end and two network cable connectors at the other end. The device can be an Ethernet device, such as a wireless AP
Network PCs, IP cameras, etc. are provided in accordance with IEEE 8023AF AT standard PoE power supply applications.
This power supply has an output power of 535v 0.6A, support power supply for devices below 30W, and support gigabit rate, can downlink and 100 megabit network. The power supply distance can reach 100 meters by using Category 5 and Category 6 network cables.
TP-LINK's standard PoE injector TL-POE170S is designed with a straight plate shape, and the black glossy surface of the shell looks very temperamental. There are in and out prompts next to the network cable interfaces at both ends of the power supply, which can be used after wiring and powering, which is simple and convenient.
The power supply is external 535V power adapter, plug and play, no management required, IEEE 802The 3AF AT standard can load electrical energy on a network cable for transmission. Compliance with IEEE 802 can be automatically detected and identified3AF AT standard powered devices such as networks**, webcams, wireless APs, etc., and automatically match the output power up to 30W.
Mercury 5-port 100 Gigabit 4-port PoE switch P5 adopts a new appearance design, and the shell is made of excellent materials, which is heat and impact resistant. The front and sides of the shell form a geometric matrix, with clean lines. P5 uses a dedicated PSE chip and has a strong bandwidth processing capability.
IEEE 8023AF AT standard design, external 43W high-power power supply, the maximum power supply power of a single port POE can reach 30W, only one network cable is needed, network data and power can be transmitted at the same time, which can meet the needs of various applications, such as the power supply needs of cameras IPC wireless AP, etc., and connect up to four powered devices. Plug and play, no additional setup required.
At present, there are two main POE power supplies on the market: POE injectors and PoE switches.
3. The three products of Tengda and Pulian belong to the former, while the products of Mercury belong to the latter.
In terms of appearance, the three POE power supplies of Tengda, Pulian and Mercury combine the power supply module and power adapter into one module, which is more integrated; H3C, on the other hand, adopts the scheme of separating the power supply module and the power adapter.
In terms of functional parameters, Xinhua.
Third, there is not much difference between Tengda and Pulian as a whole, and they both support 802The 3AF AT standard can provide 25-30W power supply for wireless APs, webcams and other powered devices, and all support gigabit networks.
Mercury's PoE switch has five network ports, supporting network and power for four powered devices, with a single port of 30W and a total output of 43W.