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Posted: **Thu Mar 23, 2017 6:51 pm**

Hello everyone
I have a question about POE 48 v and I think I'll find my answer here ...
Basic we use 4 pairs of which 123 and 6 for data and 4 5 + and 7 8 - for DC power supply ...

But then why on some switch POE of cameras 48 V there are 12 + and 3 and 6 - (attached photo)
Be I understand nothing be there different type of POE .......... :headb:

Can you help me ?

Thank you

Posted: **Thu Mar 23, 2017 7:30 pm**

Read this post viewtopic.php?f=6&t=1178

Use the search feature as this has been discussed a million times on here

Posted: **Mon Mar 27, 2017 1:57 am**

I agree with your explanation ...
But then why does it work ????????????? With my picture attached ...... :headb:

Posted: **Mon Mar 27, 2017 7:56 am**

This would be a question for the manufacturer of the device.

We are straight forward where as you select a passive POE option and we apply voltage to specific pins.

My guess is they use a POE controller chip that can use MODE A or MODE B

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