After its release as an IEEE standard in 2003, Power over Ethernet (PoE) has continued its upward spiral in performance, demonstrating an ability to transfer Ethernet data at faster speeds and dc power at higher levels—all in a single eight-wire bundle. And every enhancement to the standard adds to its popularity, so much so that most analysts project global revenue from PoE power-sourcing equipment (PSE) and powered devices (PDs) will reach at least $3 billion in 2025 from less than $1
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