Network cable not working

hans gruber

hans gruber

hans gruber

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Joined
25 Feb 2016
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219
I'm installing a hikvision CCTV system. I made a network cable for one of the cameras. After first attaching one rj45 the wrong way round, I redid it, and the cable tester suggests the cable is fine. Sadly it doesn't work. The camera plugged into the NVR doesn't power up or show up.

With the pre made cable I was using to test it works fine.

Is it the type of cable I'm using? The cameras are PoE. Or is it not correctly made? The cable tester lights up in sequence for all 8 strands, which is confusing me.

20230321-191252.jpg
 
Thanks. Did the 568b one.

As long as it should work in theory I will try some diffetent/better rj45 connectors.

The only issue is which is the faulty one?

I just wasn't sure if the PoE was an issue and the cable couldn't handle the power/current requirements.

I will also see if I can try the cable in another setting, but it's in a roof void so this won't be easy. It's a bit naff if the tester is duff.
 
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Cable is about 6 meters.

Thinking a bit more about this. As long as the colours line up at each end, why would it matter in what order you did them?

I do have a multimeter so will give that a try.
 
Blueball said:
From: https://www.vcelink.com/blogs/focus/t568a-vs-t568b

T568A wiring scheme is used to interconnect dual computers and T568B is used to connect switches, HUBs, and other devices.
Click to expand...

To be honest either is fine but B is normal. Back in the day you needed 'crosswired' cables (a at one end, b at the other) to link switches together. You could also use them to directly link two PCs, which wasn't uncommon when switches were expensive and domestic routers weren't a thing.
 
K.C. Leblanc said:
To be honest either is fine but B is normal. Back in the day you needed 'crosswired' cables (a at one end, b at the other) to link switches together. You could also use them to directly link two PCs, which wasn't uncommon when switches were expensive and domestic routers weren't a thing.
Click to expand...
Exactly this. Applying the correct standard here isn’t likely to be the issue, auto sensing has been a thing for decades now, poor termination likely is.
 
I read someone else's post with the same issue. Cable tester said fine but cable didn't work. They reterminated and it was fine.

I'll pick up some new pass through rj45. I just hope it isn't also the crimping tool.
 
I bought some pass through rj45 and re did one end. The cable started working. I've since made few more cables and all work fine. It must have been dodgy rj45 connectors.

Thanks again for everyone's help
 
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