POE Network Switch Features:
A Power over Ethernet (PoE) network switch is a network device that has the additional ability to provide power to connected devices while transmitting data over the same Ethernet cable. The following are the main functions of a POE network switch:
Power Supply: A POE switch can provide power to POE-compatible devices connected to its ports (e.g., IP cameras, IP phones, wireless access points, etc.), thus eliminating the need for a separate power line.
Data Transmission: In addition to providing power, POE switches are capable of transmitting data over the same Ethernet cable. This means that devices can receive both network connectivity and power over a single connection.
Flexibility and Simplified Installation: POE technology makes the deployment of devices more flexible and less dependent on the location of power outlets. This simplifies the installation of devices, especially in areas where it is difficult to install power lines.
Centralized Management: POE network switches provide the ability to centrally manage all connected devices. Administrators can manage and monitor power through the switch, enabling fine-grained control of individual devices.
Cost Effectiveness: POE reduces installation and maintenance costs because separate power and data connections for each device are no longer required.
POE power implementation:
POE power is supplied to devices by embedding the power delivery into the Ethernet cable. The following are implementations of POE power:
IEEE 802.3af and IEEE 802.3at standards: These two standards define the specifications for POE power. the IEEE 802.3af standard supports the provision of up to 15.4 watts (W) of power, while the IEEE 802.3at standard (also known as POE+) provides higher power up to 30 W. The IEEE 802.3af standard supports the provision of up to 15.4 watts (W) of power.
Power Transmission over Data Lines: Power is transmitted over the data lines of the Ethernet cable rather than over the power lines of the cable. This is done by alternating unused pairs in the cable to prevent conflicts with data transmission.
POE Injectors and Splitters: For devices that do not support POE, a POE injector can be used to add power to the Ethernet cable. For devices that need to separate power from data, a POE splitter can be used.
PD (Powered Device) and PSE (Power Sourcing Equipment): A POE powered system usually involves two main components, the PD and the PSE. the PD is the device that receives the power, such as an IP camera. the PSE is the device that provides the power, such as a POE network switch. The switch detects if the connected device needs power and provides appropriate power when needed.
Overall, POE network switches provide greater flexibility and convenience for devices by combining power and data transmission into a single cable. This technology is widely used in a variety of scenarios, especially where there is a need to simplify cabling and reduce costs.