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POE Does Not Work

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POE Does Not Work

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POE Does Not Work
POE Does Not Work
2024-02-26 17:27:47 - last edited 2024-02-27 09:47:13
Tags: #PoE
Model: TL-SG3452P  
Hardware Version: V3
Firmware Version: 3.20.5 Build 20230705 Rel.44420

Hey folks,

Go easy on me, I've not had this switch for long so it may well be user error.

I have tried to power a couple of devices with POE from this switch, without success. The first being a Unifi AP, which I couldn't get to work, so went back to the POE Injector I got with it. Currently I'm trying to get a Reolink POE Video Doorbell working with it, with little success.

The Reolink is 802.3af compatible, which I believe means it should work perfectly with this switch. The POE Indicator on the front of the switch just flashes green.

Log shows...

 

1

2024-02-26 17:26:58

PoE

level_3

  Power supply status of port 12 changes from on to off.
2

2024-02-26 17:26:57

PoE

level_3

  Power supply status of port 12 changes from off to on.
3

2024-02-26 17:26:55

PoE

level_3

  Power supply status of port 12 changes from on to off.
4

2024-02-26 17:26:54

PoE

level_3

  Power supply status of port 12 changes from off to on.
5

2024-02-26 17:26:52

PoE

level_3

  Power supply status of port 12 changes from on to off.
6

2024-02-26 17:26:51

PoE

level_3

  Power supply status of port 12 changes from off to on.
7

2024-02-26 17:26:48

PoE

level_3

  Power supply status of port 12 changes from on to off.
8

2024-02-26 17:26:47

PoE

level_3

  Power supply status of port 12 changes from off to on.



And this repeats over and over.

Setting for POE are at default.

Any ideas?


Cheers

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#1
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2 Accepted Solutions
Re:POE Does Not Work-Solution
2024-02-27 01:40:44 - last edited 2024-02-27 09:47:16

Hi @NeoDude 

Thanks for posting in our business forum.

Try a 3ft new cable. Might be a cable issue.

 

And other possible reasons: Why my PoE powered device cannot work properly when connected to the PoE Switch？

Recommended Solution
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#2
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Re:POE Does Not Work-Solution
2024-02-27 08:59:29 - last edited 2024-02-27 09:47:13

  @Clive_A 

I've tried 5 different cables now, still no change. I've tried 5 different ports, no change.

*EDIT*

Got it working. It would appear that POE does not like shielded cables.

Recommended Solution
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  2  
#3
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5 Reply
Re:POE Does Not Work-Solution
2024-02-27 01:40:44 - last edited 2024-02-27 09:47:16

Hi @NeoDude 

Thanks for posting in our business forum.

Try a 3ft new cable. Might be a cable issue.

 

And other possible reasons: Why my PoE powered device cannot work properly when connected to the PoE Switch？

Recommended Solution
  2  
  2  
#2
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Re:POE Does Not Work-Solution
2024-02-27 08:59:29 - last edited 2024-02-27 09:47:13

  @Clive_A 

I've tried 5 different cables now, still no change. I've tried 5 different ports, no change.

*EDIT*

Got it working. It would appear that POE does not like shielded cables.

Recommended Solution
  2  
  2  
#3
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Re:POE Does Not Work
2024-02-27 09:01:55

Hi @NeoDude 

Thanks for posting in our business forum.

NeoDude wrote

  @Clive_A 

I've tried 5 different cables now, still no change. I've tried 5 different ports, no change.

Do you have a different PoE device to test it out?

I would assume it is a problem with your device.

If this persists with a different one or TP-Link one, you can consider RMA.

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#4
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Re:POE Does Not Work
2024-02-27 15:50:14 - last edited 2024-02-27 15:53:36

  @Clive_A 

Thanks for the efforts, but as per my edit above, I got it working. Seems POE doesn't like shielded cables.

I tried 5 different cables, all shielded, with no joy. As soon as I tried the brand new unshielded cable supplied with the camera, it sprang into life.

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#5
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Re:POE Does Not Work
2024-03-02 23:15:19

  @NeoDude 

 

FYI, I don't think POE cares if a cable is shielded or not, unless there is a grounding issue either in the POE switch or the device that you are trying to power.  We use shielded cables a lot.  Sounds like something is causing a short when you are using a shielded cable, as the shielded cable will create a common grounding point to both devices. 

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#6
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