I always see the words “support PoE” in many places, but I’m still not quite sure what this POE is. How do we know if the RJ45 coupler can support POE?
Power over Ethernet (PoE) is an advanced technique often used in Local Area Networks (LAN). PoE technology allows Ethernet cables to transmit data and electrical power at the same time.
you can read this article to know about poe: What is PoE (Power over Ethernet)? – VCELINK
PoE stands for Power over Ethernet, meaning Power over Ethernet.
It is a technology that allows for simultaneous data and power transmission over Ethernet cables. It is designed to simplify the installation and cabling of network devices, especially those located away from electrical outlets.
PoE technology enables remote powering of devices by integrating power and data lines into the same Ethernet cable. Doing so eliminates the need for users to provide a separate power supply for each network device, reducing cabling complexity and cost.
In network cables, the power supply standard allows two wire order power supply methods:
One transmits current on pairs 4, 5, 7, and 8, specifying that 4 and 5 are positive and 7 and 8 are negative.
The other type of power supply transmits power on the 1, 2, 3, and 6 wires, with the polarity being either 1 and 2 as positive and 3 and 6 as unfavorable or 1 and 2 as negative and 3 and 6 as positive.
Suppose you want to check whether your RJ45 coupler supports PoE. In that case, you can check whether your RJ45 coupler is labeled with some descriptive markings, such as “PoE” or “Power over Ethernet” on the back, or check whether the model number of the network module is followed by relevant codes or abbreviations, such as “P,” “P+,” or “PSE,” these codes or abbreviations can be found on the back of the module. "Or check if the model number of the network module is followed by the relevant code or abbreviation, such as “P,” “P+,” or “PSE.” These designations or abbreviations usually indicate that the module supports PoE.
Suppose you can’t find the above information. In that case, you can use some known network cables and switches with PoE function to form a PoE-enabled line and then connect your own RJ45 coupler to this PoE-enabled line to test whether the whole line supports PoE to determine whether your own RJ45 coupler supports PoE.
It’s difficult to identify if your couplers, keystone jacks, or 8P8C connectors support PoE technology. The most reliable way is to ask the manufacturer.
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