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Forum Discussion
PoE 802.3af Standards A or B
Does the M4300-28G-PoE+ support PoE 802.3af with variant A or B, or maybe both?
A or B refers to https://en.wikipedia.org/wiki/Power_over_Ethernet#Pinouts
I have PoE device which in particular re...
Thank You for a quick reply, but I still have doubts.
This device (UniFi AP) supports passive PoE, as stated in datasheet:
24V Passive PoE (Pairs 4, 5+; 7, 8 Return)
802.3af Alternative A (Pairs 1, 2+; 3, 6 Return)
So if switch will power device on pins 4,5;7,8 (variant B), may not detect it properly, or even damage by putting 50V, where 24V is expected.
If switch puts power on pins 1,2;3,6, then all should be fine. That's why is so important for me, which variant is implemented.
As a last resort solution is possible to connect device with only 1,2,3,6 pins, but then connection speed will be down to 100Mbit, what i want to avoid.
I think the access point manufacturer datasheet is leading to some confusion, and I can attest you will find many reports and feedback on other forums with this access point working fine with perfectly standard 802.3af switches.
Thank You. I'll get the mentioned hardware in about month or so, then report back.
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