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PoE Technical Resources
Authoritative guides on PoE standards, power engineering, cabling and real-world applications — written by our engineering team.
standards
PoE Power Classes 0 to 8 Explained
What each PoE class means at the PSE and at the PD, how physical-layer classification works, and why LLDP negotiation and Autoclass change your power budget.
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IEEE 802.3bt Explained: Type 3, Type 4 and 90W PoE
A practical guide to IEEE 802.3bt: what Type 3 and Type 4 deliver, how 4-pair power works, single- and dual-signature PDs, Autoclass, and backward compatibility.
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PoE Standards Explained: IEEE 802.3af vs 802.3at vs 802.3bt
A clear, vendor-neutral guide to IEEE 802.3af, 802.3at and 802.3bt PoE: Types 1-4, PSE/PD power levels, voltage ranges, current and the pairs used.
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PD and PSE Explained: The PoE Powering Architecture
Understand PoE's two roles: PSE (endspan or midspan) sources power; PD receives it. Learn detection, classification and the 25k-ohm signature.
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