In addition to the functions of a common switch, the PoE switch also has a PoE power supply function, which can supply power to network devices such as network cameras (IPC) and wireless APs, thereby eliminating complicated power wiring. To choose the right PoE switch, you need to pay attention to the following points:
1. Power supply standards
To determine the power supply protocol (such as 802.3af, 802.3at, or non-standard PoE) supported by the AP (AP or IPC), the PoE power supply protocol supported by the switch must be the same as that of the powered terminal. The 802.1af standard PoE switch has a single-port output power of 15.4W, and the 802.3at standard PoE switch has a single-port input power of 30W. For a power-hungry device with a large power, it is recommended to use an 802.3at standard PoE switch.
In addition to considering the power supply protocol and single-port output power, the PoE switch needs to consider the overall power of the PoE switch. The larger the total power, the stronger the power supply capability (the maximum power supply must be greater than the total power of the power receiving terminal).
Note: The power supply protocols of our current PoE switches support 802.3af and 802.3at (adaptive matching receivers).
2. Physical Port
There are also a number of ports on the PoE switch, ranging from 4 to 24 ports. Please consider the number of PoE power ports to be purchased according to the number of powered terminals.
3. The transmission rate
The transmission rate of a PoE switch is 100 Mbps and Gigabit. The maximum rate that the port needs to support depends on the powered terminal and service requirements. In general, Gigabit PoE switches outperform 100 Mbps PoE switches. Take network monitoring as an example. If the monitoring device is configured with a high-definition camera, but the bandwidth is insufficient to support high-definition propagation, packet loss will occur, affecting the monitoring effect. Delay, Caton). To achieve high-definition smoothness, Gigabit PoE switches can be used.
4. Manageability
The PoE switch divides the network into a PoE switch and a basic PoE switch. The basic PoE switch mainly provides PoE power supply ports. It can be used directly without configuration. In addition to PoE power supply, the network management PoE switch can flexibly configure port power supply time and priority and can specify a more reasonable power supply plan.
Original article from:https://www.optcore.net
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