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Is PoE AC or DC?

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Is PoE AC or DC?

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There are two main types of PoE, with one of those split into various subtypes. Passive PoE is 24v and is either on or off, so no autosensing on ports. 802.1af/at is 48v and is autosensing so it will only turn the power on if it detects a PoE device connecting to it.

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