NickDawg41

Just want to update this issue. It turns out that it was a power issue. On a whim, I installed a 24v ac power box and haven't had a problem since. I just want to thank all you guys that contributed.

Yes, the cable is the same, I replaced the switches with the same brand, but higher end models, both of which are gigabit. There is a pc that is used to view the cameras on the network and 2 other nvrs. About 20 cameras all together on the same subnet. The original router was a linksys wrt54g. There is a UPS to which the nvrs are plugged into.

The farthest camera is about 80 feet. They are all set static, and they are all set to A moderate bitrate. Unfortunately, the clients do not have these hooked up to the web, and do not want them to be for some reason. So the video loss notification is out. There isn't even an Internet connection in that part of their building. I did look back at footage and saw that the ones that did go out all went out at the same time. It's really odd.I have never had this issue before, and I'm stressing out big time. For the record, I have replaced the switch twice, the router twice and each camera once. I'm thinking of biting the bullet and replacing the cable with cat6. I just want to thank everyone that has given input. I really do appreciate it.

The router is an asus RT-AC66U, and there are 3 switches. 2 linksys and 1 netgear. I got the cable from ADI. The dahua are on the power box and the arecont are on the poe.

They are Dahua IPC-HDBW3300 IP dome cameras. My distributor recommended the cameras, so I used them. I used solid cat5e 24 AWG cable. When the cam is not showing up on the NVR, I try to use the cameras assigned IP and still get nothing. They also have some Arecont 2255AM poe IP cams that were installed by another company that are doing the same thing. I'll post some images when I go back to the site. Thanks again for the input.

The cameras all have a license and it not always the same cameras. Sometimes it's one camera, sometimes it's 5 cameras. The Viostor model is VS-6016 This job makes or breaks my business with this company. I have never had this much trouble before. Thank you for your help.

Hello all, I'm seriously at wits end . I have installed 9 IP cameras, all hard wired, and they seem to randomly disconnect/disappear from live view of the NVR. The only way to get them back up is to do a power cycle. They are on a 12v 20a power distribution box. The NVR is a viostor, and the cameras I am unsure of the brand. I have switched out a few and I still have the same problem. I have already changed the switch. The only thing I have left to try is to replace all the cat5 cable I ran, which I really don't want to do. any help is appreciated.