Dahua camera drop out

O

Oskar2

n3wb
Jul 10, 2020
9
2
uk
I have 5 Dahua IPC 4MP cameras (IPC-HDW4413EM-ASE-0280) and a Dahua NVR4208-8P-4KS2-6TB recorder.
2 cameras are cable wired direct
1 camera is connected via 1 TP powerline link
2 cameras are connected via 1TP powerline link

No problems with the first 3 cameras but the last two I have issues with the cameras losing connection up to 50% of the time but only at night! During the daytime these two cameras operate properly with no drop outs. I have rebooted, updated, restarted, reset, changed power sockets, added new unique power sockets..... but still no difference. I am using TP links because of the distance from the house.

Any suggestions would be very welcome please.
 
The power line adapter is more than likely the culprit. Only way to test is to run Ethernet and see if the drops stop.
 
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biggen said:
The power line adapter is more than likely the culprit. Only way to test is to run Ethernet and see if the drops stop.
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I agree but why is the issue only at night? I am sure if I run an ethernet it will be fine but its 70mtrs of armoured cable each camera.
 
Oskar2 said:
I agree but why is the issue only at night? I am sure if I run an ethernet it will be fine but its 70mtrs of armoured cable each camera.
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Who knows... Perhaps there is a power issue in the evening that prevents it from working. I mean, its literally anyone's guess. Ethernet wasn't designed to work over AC lines so I would expect issues from time to time.
 
Power line noise can vary between day and night time. Something could be turning on at night that produces enough electrical noise to disrupt your camera feeds. Powerline adapters may be fine for a PC, but video is a constant, never ending, data stream that does not tolerate interference as well. Either use a dedicated RF link, not WiFi, or get some CAT cable to them.
 
The cameras may be supplied by a transformer and the mains, but the signal is being directly transmitted on the mains by the powerline adapter. Any interference there wil result in drop outs.
 
sebastiantombs said:
The cameras may be supplied by a transformer and the mains, but the signal is being directly transmitted on the mains by the powerline adapter. Any interference there wil result in drop outs.


Oskar2 said:
Two power supplies about 2mt from camera
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The power supply they fitted for the other camera is different, see attached, maybe it’s the power supply causing the problems when it switches to IR
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If that's a powerline link, as you mention in the original post, exactly where does the "data out port" go? A powerline adapter indicates you're sending ethernet over existing house wiring.
 
sebastiantombs said:
If that's a powerline link, as you mention in the original post, exactly where does the "data out port" go? A powerline adapter indicates you're sending ethernet over existing house wiring.
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Yes sorry the pictures are of the power source only I’m using TP Av600 powerline adaptors which the Ethernet cables from the transformers connect via the cameras
 
Oskar2 said:
Yes sorry the pictures are of the power source only I’m using TP Av600 powerline adaptors which the Ethernet cables from the transformers connect via the cameras
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I’m wondering if these transformers are the source of interference when the cameras are in IR mode
 
You could, conceivably, be overloading that single PoE injector which could easily be the source of the problem. You could try a few things. Disconnect one camera and see if the dropouts stop. If they do, eureka, you found the problem. If that doesn't work, then try with a cable and a single camera on the PoE injector. You could also swap equipment around from the one that doesn't drop out to the one that does. I'd do that one piece at a time, PoE injector first, the the powerline-ethernet adapter just to be able to isolate each piece.
 
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Have a look at this thread, and "steal" the ping-test script. Run it on your infrastructure for 24 hours, and see if there is seasonality in your "error" rates.

Good luck!
CC
 
sebastiantombs said:
You could, conceivably, be overloading that single PoE injector which could easily be the source of the problem. You could try a few things. Disconnect one camera and see if the dropouts stop. If they do, eureka, you found the problem. If that doesn't work, then try with a cable and a single camera on the PoE injector. You could also swap equipment around from the one that doesn't drop out to the one that does. I'd do that one piece at a time, PoE injector first, the the powerline-ethernet adapter just to be able to isolate each piece.
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I've tried disconnecting one camera and the remaining one still dropped out at night, so I'm going to swap Powerline adaptors over.
Thanks for the help
 
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Well it was better last night with less drop out but then that's what it does sometimes. Also should have mentioned that sometimes its just one camera that drops out for a period then both will drop out. So the only difference between the 2 powerline set ups is the distance and the transformers.
But you come to square one when it is not a problem during the day and I have nothing that is switching on or off during the night which is not running during the day.
Think I might be cabling it underground this Autumn!
 
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Oskar2 said:
Well it was better last night with less drop out but then that's what it does sometimes. Also should have mentioned that sometimes its just one camera that drops out for a period then both will drop out. So the only difference between the 2 powerline set ups is the distance and the transformers.
But you come to square one when it is not a problem during the day and I have nothing that is switching on or off during the night which is not running during the day.
Think I might be cabling it underground this Autumn!
Click to expand...

Did you have a look at the pingtest in the thread I mentionned above? If you run this test, in parallel, to 4-5 other devices on your network, you can then eliminate the "good" wiring versus the "bad" wiring and networking components.
 
The next thing to try is cable to each camera. From your post I assume these are outside and the cable will be underground. I'd definitely recommend using conduit, PVCis fine, and a weather rated CAT5E, or better, cable. Alternately, since you do seem to have power out there, you could switch to a Ubiquity Nano Station Loco set up as a dedicated RF link. I currently have two cameras running on one and haven't had one problem with it. It is more expensive than cable/conduit but is one heck of a lot less work!
 
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