Standard POE switches comply with IEEE standards and have handshake protocols and certifications to ensure power supply security and device compatibility, while non-standard POE switches may have no standard or handshake protocols, which pose security risks. When you choose, you should make trade-offs based on your actual needs and scenarios, and give priority to standard POE switches to ensure stable operation of the device.
Part 1: What is a POE Switch?
A POE switch is a device with network switching and POE power supply functions, which can provide power to remote devices through network cables. It is one of the common devices in POE power supply system. Through POE switches, users can realize an all-in-one solution for data transmission and power supply of remote devices. This technology can provide power to the device, avoiding the need for additional power sources.
2. Standard PoE switches
A standard PoE switch is a network device that can provide power and transmit data to a device over a network cable, hence the name "Power over Ethernet" (PoE) switch. This technology eliminates the need for additional power supplies and is an essential part of building LAN, enterprise, and data center networks in enterprises and organizations. This topic describes in detail how standard PoE switches work, application scenarios, and benefits.
1. How it works
Standard PoE switches operate based on the IEEE 802.3af standard, a standard that allows power and data transmission to be provided over a network line. A standard PoE switch emits low-voltage direct current, converts power into energy in a network cable, and then transmits it to the device. The device does not receive current directly from the switch and only sends power to the device when the switch is requested.
Another advantage of a standard PoE switch is that it provides port identification. This means that it is able to detect the power demand of the device and provide the best possible power to the device if the demand is met. For example, when connecting low-power devices such as IP phones or IP cameras, a standard PoE switch provides the appropriate power. When a high-power device is connected, such as a wireless router or TV, the switch automatically senses that the device needs more power and provides it with high-power power.
2. Application scenarios
Standard PoE switches have a wide range of applications in multiple industries and fields.
Here are a few common use cases:
1) Video surveillance
A standard PoE switch can provide power to wireless cameras or video surveillance equipment installed in remote areas. This allows the equipment to be independent of external power sources, reducing the complexity of installation and maintenance, and improving the safety and reliability of the overall system.
2) Wireless access points
Standard PoE switches can provide power to wireless access points, making them independent of external power sources. In this way, wireless access points can be installed anywhere more flexibly, improving the coverage and signal strength of the network.
3) IP Telephony
A standard PoE switch can provide power to IP phones, ensuring that they can run properly when no additional power is required.
3. Advantages
There are several advantages to using a standard PoE switch:
1) Simplified wiring
The use of standard PoE switches reduces the number of cables required during cabling. This can make the network cabling more compact and tidy, and reduce the overall cabling cost.
2) Simplified installation
The use of standard PoE switches reduces the complexity of installation compared to traditional power cables. The device only needs to be connected to the switch, and there is no need to install an additional power cord, which greatly simplifies the installation process of the device.
3) Improve reliability
When using a standard PoE switch, the device only needs to be connected to the switch to transmit data and power at the same time. In this way, the equipment can operate normally, even in the event of a sudden power outage, and the reliability and stability of the entire system can be improved.
3. Non-standard PoE switches
Non-standard PoE switches are switches that do not comply with the IEEE 802.3af/at standard and may use their own unique power delivery protocol. Due to the lack of a unified standard, non-standard PoE switches may have compatibility issues when connecting with other devices. In addition, the power output of non-standard PoE switches may not be as stable as that of standard PoE switches, which poses certain security risks.
1. How it works
Compared with standard PoE switches, non-standard PoE switches have been upgraded and improved in terms of power supply and control. They use different power protocols and technologies, such as the IEEE 802.3at standard and 4PPoE (Four-Pair Power over Ethernet). In contrast, non-standard PoE switches can provide higher power and more control for a wide range of devices.
For example, a non-standard PoE switch can adjust the power output by monitoring the power demand of the device to keep the device running optimally. It can also support a wide range of power outputs, increasing the flexibility and customizability of the device.
2. Application scenarios
Non-standard PoE switches are widely used in different fields and industries.
Here are a few common use cases:
1) Wireless routers
Non-standard PoE switches can provide power to wireless routers, reducing the complexity and configuration of wireless routers. By using non-standard PoE switches, wireless routers can be deployed and managed more flexibly, improving the coverage and strength of the network.
2) IP telephony
Non-standard PoE switches can provide power output for a wider variety of IP phones. They can also provide more control and customization features that improve the security and reliability of IP phones.
3) Data centers
In the data center, non-standard PoE switches can support a wider variety of devices and applications. By using non-standard PoE switches, data center administrators can expand and control the network more flexibly and improve the efficiency and security of resources.
3. Advantages
There are several advantages to using a non-standard PoE switch:
1) Higher power
Non-standard PoE switches can provide higher power output, which provides more power and control for high-power devices. This improves the performance and safety of the equipment and reduces the likelihood of equipment failure.
2) More control
Non-standard PoE switches can provide more customization and control features for a wider variety of devices. This improves the security and stability of the network and reduces the likelihood of errors.
3) Higher adaptability
Non-standard PoE switches can provide power and control to many types of devices, increasing their adaptability and flexibility. This can reduce the cost of upgrading and replacing equipment and improve the efficiency and security of the entire network.
3. Non-PoE switches
A non-PoE switch is a switch that does not support PoE technology, which can only transmit data and cannot provide power to connected devices. Non-PoE switches are generally less expensive than PoE switches and are suitable for those occasions where PoE functionality is not required, such as offices, home networks, etc.
1. How it works
A non-PoE switch is similar to a normal switch, except that it cannot provide power to other devices. Typically, a separate power connector is required for devices on the network to connect to an external power adapter. This adapter can provide power by plugging into an electrical outlet, thus providing the required power to the device.
2. Application scenarios
Non-PoE switches are suitable for many application scenarios that do not require PoE technology.
Here are a few common use cases:
1) Internal services
In addition to devices such as IP phones, wireless routers, etc., there are many other types of devices in the office that need to use the network. For example, computers, printers, etc., none of them require PoE technology. In this case, using a non-PoE switch is a more affordable option.
2) High-speed data transmission network
In a high-speed data transmission network, a high-speed network switch is required. In this case, using a non-PoE switch is more cost-effective than using a PoE switch. Non-PoE switches can provide greater throughput for high-speed networks, thereby improving the transmission speed and stability of the network.
3) Data centers
Data centers often use specialized equipment and systems that don't require PoE technology. In this case, using a non-PoE switch is a more appropriate option. Non-PoE switches can provide better performance, which improves the efficiency and security of data centers.
3 Advantages
There are several advantages to using a non-PoE switch:
1) More affordable
Compared with PoE switches, non-PoE switches are more cost-effective. They don't require integrated PoE technology, so they're less costly.
2) Better performance
Non-PoE switches can focus on exchanging data, providing better performance. In contrast, PoE switches need to convert a large amount of energy into power, which affects their performance.
3) Be more flexible
Non-PoE switches are more flexible and can match different types and sizes of networks. They can provide the best performance and efficiency for different types of equipment and meet the needs of different application scenarios.
Fourth, the difference is compared
Here is a detailed comparison between the three types of PoE switches:
What Are the Differences Between Standard POE Switches and Non-Standard POE Switches?
1. Compliant standards: Standard POE switches comply with standards such as IEEE802.3af, 802.3at, etc., and are commonly known as 48V switches. These standards define how power and data transmission are provided to devices over network cables. On the contrary, non-standard POE switches do not meet these standards, and their voltage values may include 48V, 24V, 12V, 5V, etc., depending on the design and application needs of the equipment.
2. Working principle: Standard POE switches have a handshake protocol, that is, power transmission will only take place after a connection is established and negotiated between the power supply device (PSE) and the power receiving device (PD). This process is handled by the PoE control chip, which detects whether the receiver device complies with the standard. Non-standard POE switches do not have such a handshake protocol and detection process, and they will start powering power immediately when connected to a network terminal device, regardless of whether the device supports PoE or not.
3. Security: Since the standard POE switch has a detection and handshake protocol, it can power the device more securely, avoiding the damage that may be caused by misconnecting the device that does not support PoE. However, non-standard POE switches do not have these features, and if they are connected to devices that do not support PoE, the equipment may be burned.
4. Application scenarios: Standard POE switches have a wide range of applications in multiple industries and fields, such as IP telephony, surveillance, wireless coverage, etc. These applications often require the device to function properly without the need for an additional power supply. Non-standard POE switches may be used in some specific scenarios with different voltage requirements, but their application scope is relatively narrow due to their security and stability problems.
The choice between using a standard POE switch or a non-standard POE switch should be based on specific application requirements and scenarios. In most cases, in order to ensure the safe and stable operation of the device, it is recommended to use a POE switch that complies with IEEE standards.
5. Summary
In general, standard PoE switches are the most common type of switch, providing power and data transmission to connected devices. Although non-standard PoE switches may have compatibility issues and security risks, they also have their own unique application scenarios. Non-PoE switches are suitable for those situations where PoE functionality is not required.
When selecting a PoE switch, you need to select the appropriate switch type based on your actual needs and budget. Standard PoE switches are a mid-cost option for low-power devices, while non-standard PoE switches are for higher-power devices at a higher cost. Non-PoE switches are only used for data transmission and have a low cost, but they require a separate power adapter. Before making any choice, you should carefully consider your needs and evaluations in order to select the best PoE switch.