BasicInternet:Power over Ethernet specification

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Power over Ethernet specification
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Power over Ethernet (PoE)

Power over Ethernet (PoE) is defined by two standards:

  • IEEE 802.3af
  • IEEE 802.3at

The first one, 802.3af, is the first published standard, and the second one, 802.3at, also known as PoE+ or PoE plus, is an evolution of the first which provides more power.


On the other hand, MikroTik does not follow those standards even if it says its devices are PoE capable. The input voltage range is different and thus, it offers some additional products to transform any standard PoE source into a compatible input.


The following table describes the two IEEE standards and some MikroTik PoE speficifations:


MikroTik

RB951Ui-2HnD

MikroTik

RBSTX-5HPnD

MikroTik

RBSTXG- 5HPnD-SAr2

MikroTik

mAP 2n

IEEE 802.3at IEEE 802.3af
Voltage range

at end device

8-30V 8-30V 8-30V 10-57V 42.5-57V 37-57V
Voltage range at

powering device

- 24V power

supply

24V power

supply

- 50-57V 44-57V
Power at end

device

7W 7W 11W - 25.5W 12.95W
Power at

powering device

- 19.2W 19.2W - 30W 15.4W
Requirements RBPOE

PoE injector

RBPOE

included

RBPOE

included

RBPOE

PoE injector

Cat5 cable Cat3 or Cat5
Notes Passive PoE Passive PoE Passive PoE


Solar Power

MikroTik has a well explained wiki page with a complete description about Solar Power.

Solar Power