This happens a lot in my work. A customer signs up to AT&T and we go in and install camera equipment then a year later the customer switches from AT&T to Comcast and now the cameras don’t work or vise versa on the internet providers.
Reason being the internet service provider only cares about getting the connection into the house. As long as the WiFi works they’re done. Some times they will plug up stuff but 95% of the time they don’t.
So if you switch providers and the cameras are not working here are a few ways to troubleshoot.
STEP 1
Powercycle the DVR/NVR. This will clear out the junk and it will get a new IP address from the modem and should come back online. Just turn off the DVR or NVR, wait 30 seconds then plug it in. Wait about two – five minutes after you powered it on and then see if you can access them.
STEP 2
If that didn’t work then it’s probably not plugged into the modem. As long as you’re new modem is in the same location as the old modem you’ll just have to plug in the cables that were left unplugged. Plug them in and try STEP 1 again.
STEP 3
Sometimes and it’s rare there might be a WiFi to Ethernet bridge used. Basically it makes a WiFi connection to a wired connection since most DVR and NVR systems only used a wired Ethernet connection. If you see a small box plugged into the wall or power strip with two antennas and a ethernet cable coming from it to the DVR or NVR then that’s the bridge. Just look up the brand and model and reprogram it to work with your WiFi and follow STEP 1 again.
Keep in mind if you can’t see the cameras through the App it doesn’t mean the system isn’t recording. It’s still recording and doing it’s job. All what happen was the ability to view the cameras.