Tag: poe
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Power Over Ethernet (PoE)
Power over Ethernet (PoE) is an optional standard that provides direct current electrical power over Ethernet twisted-pair cabling. This makes it possible for an Ethernet switch port to provide both Ethernet data and the power needed to operate.
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PoE Vendor Extensions to the Standard
After 802.3at made it possible to provide roughly 30 watts over two pairs of wires, it was a relatively straightforward process to extend the standard to provide power over four pairs simultaneously.
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PoE Port Management
To manage these power loads, vendors of switches typically program the switches to provision power one port at a time, this is PoE Port Management.
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PoE and Cable Pairs
The PoE standard specifies the way that power is injected into the Ethernet cable pairs, and which pairs should be used.
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How Power Over Ethernet works – PoE Operations
Understanding how PoE works. The idle state and three operational states: detection, classification, and operation.
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PoE Device Roles and Type Parameters
For those who want to delve into the details of the Power over Ethernet technology, here we discuss PoE devices roles and type parameters.