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1517 posts

Uber Geek

# 137966 15-Dec-2013 10:19
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I have a bit of a weird problem going on with some network cabling. Yesterday I ran some Cat5e cabling for an external IP camera. One end is terminated on a patch panel and the other has a glass plug on it so that it can plug directly into the camera. Once installed I have tested using a cable tester and confirmed that its wried correctly.

Now the strange problem starts. The camera will power up but has no network activity, I have tested this using a POE switch, and two different POE injectors. I have swapped over patch leads and even gone as far as testing the patch leads. The cable run is no more than 10m max.

Would appreciate it if anyone has any ideas as I am now completely lost.




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1517 posts

Uber Geek

  # 952483 15-Dec-2013 10:58
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Ran some tests from my switch and has come back with the following.

Pair1:Open in Cable at 1m
Pair3:Short in Cable at 1m
Pair4:Short in Cable at 2m

Would this mean faulty cable or possibly socket on patch panel?

4942 posts

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  # 952500 15-Dec-2013 11:31
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Try a process of elimination to determine which component is the faulty one.



135 posts

Master Geek

  # 952506 15-Dec-2013 11:51
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Hi. What is the make of the switch? What are the port settings? The camera has power, but data frames are not getting through the switchport.

Mr Snotty
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  # 952507 15-Dec-2013 11:54
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That looks like a faulty cable! Try another cable from the switch itself to make sure it's going to power on. Are you using the ubiquiti aircam?

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Biddle Corp
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  # 952574 15-Dec-2013 15:03
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What did you use as a cable tester? If it's one of the el cheapo $5 Trademe jobs they're completely worthless as they can't tell you if you have pairs wired in reverse.

You're really going to need to follow a process of elimination to find the fault. Did you wire both ends to 568A or 568B? It's a classic mistake from people new to cabling to wire both ends differently and not realise.

And are you using Passive PoE or Active PoE?


1517 posts

Uber Geek

  # 952579 15-Dec-2013 15:11
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Thanks for everyones input.

Not my first time cabling and everything in my house is wired in 568A. After trying multiple things and given the diagnostic information from the switch it came down to being faulty cable which was able to be replaced in less than 10 minutes.

Good thing I have another box of cable and that fact its a lot easier to run another cable when you already have a drub one as a draw wire.

Thanks again everyone!

3408 posts

Uber Geek


  # 954533 18-Dec-2013 21:49
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I have a song from a modified nursury rhyme

Sing a song of light & dark green
with a pocket of light orange
4 in 20 blue birds baked in a pie
when the pie was opened the orange had got all dark
now wasnt that a dainty dish to set before the brown

Customers think i am weird

In the hundereds of rolls of cable I have purchased, I have never had a problem with any - except for one a few months ago that ruined my weekend. 
Now i annoy the guy at ideal when i buy a roll because i come armed with my multimeter to test the continuity - worst thing being 2 a hour drive from town and finding a fault in a cable.

Ray Taylor
Taylor Broadband (rural hawkes bay)

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