NO LINK appears on monitor in afternoon hours

[ddextel]

As the title says, I'm having a really weird issue with the camera setup I installed a week ago in the one of my clients premises. The system contains of six 5PM HiLook turret cameras, 8Ch HiLook NVR with 3TB HDD, connected to Philips monitor via HDMI. All works perfectly until afternoon hours ( 4:30PM, 5:00PM, 5:30PM etc) when it shows NO LINK on two cameras and "HIKVISION" on the rest four. After reboot system comes back to normal. I have checked the footage recorded during the time it shows NO LINK and it seems the cameras were having active link with the NVR. Also, in the menu it actually show that all cameras are connected. Log file doesn't show any error messages. I took all the cameras and brought them back to my house, connected everything to the NVR with short leads, tested 24 hours and there isn't any issue.

This forum user had the similar if not the same problem Hikvision cloudp2p Just wondering if anyone else had that sort of issue and what would be solution.

I checked all cabling and terminations point to point and it's all good. Is it possible some other interferences could potentially cause this issue at the client premise (all the sudden voltage drop in afternoon hours, close proximity of the wireless modem/router, some RF interference etc)?

btw the cameras as well as the NVR have the latest firmware, I even replaced the NVR with the new one from supplier.

 

[alastairstevenson]

I checked all cabling and terminations point to point and it's all good.

Including the wiring conforming to T568B such that the twisted pairs are maintained?
Is the cabling copper or CCA?
Afternoons will be when the temperature is highest, so cable resistance is also highest.

I even replaced the NVR with the new one from supplier.

I took all the cameras and brought them back to my house, connected everything to the NVR with short leads, tested 24 hours and there isn't any issue.

Maybe just leaves the cabling.

 

[ddextel]

Including the wiring conforming to T568B such that the twisted pairs are maintained?
Is the cabling copper or CCA?
Afternoons will be when the temperature is highest, so cable resistance is also highest.



Maybe just leaves the cabling.

The cables are CAT5E, copper. All done like I did before with any data wiring/termination. Perhaps you're right actually, I'll check point to point again, check if the cables crossing path with power cables in the roof and see what is power consumption on POE ports when that happens. Other than that I'm running out of ideas. This is the first time I'm having such an issue. What makes me think is when it shows no link on all channels the cameras are shown as connected in the NVR's menu.

 

[SamM]

The cables are CAT5E, copper. All done like I did before with any data wiring/termination. Perhaps you're right actually, I'll check point to point again, check if the cables crossing path with power cables in the roof and see what is power consumption on POE ports when that happens. Other than that I'm running out of ideas. This is the first time I'm having such an issue. What makes me think is when it shows no link on all channels the cameras are shown as connected in the NVR's menu.

Hi

1. Is it dusk at those times? perhaps it could be when the camera changes to night mode, IR and power related.

2. What is the distance of each cable to the camera? from your explanation, it seems that the cameras are connected directly to the NVR and using the internal POE.

3. prior to reboot, what does the NVR show as the POE ports power output on the NVR? you can find it in the "Menu, Camera, POE Info" on the NVR

 

[ddextel]

Hi

1. Is it dusk at those times? perhaps it could be when the camera changes to night mode, IR and power related.

2. What is the distance of each cable to the camera? from your explanation, it seems that the cameras are connected directly to the NVR and using the internal POE.

3. prior to reboot, what does the NVR show as the POE ports power output on the NVR? you can find it in the "Menu, Camera, POE Info" on the NVR

Thank you for your your help, well appreciated.

Yes, in Western Australia where I am it's getting dark outside at those times so yes, it changes to the night mode. The longest cable is approx 15 metres, all cables connected directly to the NVR, using the internal POE. To be honest it didn't come to my mind to check the POE ports power output. Yesterday I re-terminated all camera cables again using better RJ45 connectors (read - more expensive), tested point to point, went through the roof to make sure they aren't crossing or touching power cables anywhere. Hooked up my old 4 channels NVR just for testing. So far no phone call from angry client. Today I'll get the 8Ch NVR back in place and see how it goes. If it happens again I'll have a look what's the POE power consumption as well as the power network voltage.