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No, when cameras are connected to the NVR rear ports the NVR manages the IP addresses. If you look at your NVR network settings you should see a setting for the IP address used for cameras connected to the rear ports like 192.168.254.nnn. Leave this as it is. The NVR gets an IP address from...

When cameras are connected direct to the NVR they are on a IP subnet for the cameras only. Try restarting your NVR. David

Are the cameras connected to the Ethernet ports at the rear of the NVR? David

20 - 30m window to garage through wood should be ok, any radio link asymmetry could be overcome by adjusting the bridge transmit power. Michael, I’ve a modern mains board and found powerlines to be fussy about wall sockets. David

@DrB window to window should work, as long as there is line of sight. David

The mysteries of IT, good to hear it is working again. David

@mollybolly, following on from my last post.... I want to make sure the IP addresses I gave you are ok. Can you log onto the IOTT router and post a screenshot like this, red squares not needed? Or just let me know the DHCP server start IP address.

not ideal but yes, just disconnect IOTT router WAN from ISP router and reconnect when needed. Do you use the VPN connection? Your DVR and indoor / outdoor stations need fixed IP addresses and must not conflict with the IOTT router. Let me check the IOTT router specs. David

Makes sense, search on google or a local Facebook / WhatsApp community group for a Hikvision installer. using the sadp tool is the best way to set the DVR / indoor / outdoor stations and activate / set IP address / DHCP. on your pc / laptop download and Install sadp for sadp to work...

as mentioned before I am not familiar with these devices. here is the link to the DS-KH9510-WTE1 (B) manual and the link to theDS-KD8003-IME1(B-Surface) manual link to SADP software search YouTube for setup videos. all the devices and laptop / pc will need to be connected to the IOTT router...

I know that you want this to be offline. could you try these fixed IP addresses? DVR 192.168.1.10 Outdoor station 192.168.1.11 internal station 192.168.1.12 subnet masks are all the same 255.255.255.0 gateways are all the same 192.168.1.1 If you can't set fixed IP addresses for the outdoor...

Are there any logs you can check on either device or ivms4200? There may be error messages or codes (like x0000abce) that may help. Logs are usually under advanced settings. David

Are the relevant ports open on the new router? SADP can see the devices but that doesn’t prove connectivity. David

I’m not familiar with these devices. Could it be the SIP addressing? David

What happens when DHCP is enabled on the internal and external stations? Do they get an IPV4 address from the IOTT router? What LAN subnets are the routers on? include the subnet mask as well. ISP router IPV4 = PC router IPV4 = IOTT router IPV4 = David

@mollybolly For initial setup and test I would do this on the bench.... And then move on to the actual setup with fixed IP addresses outside the range of the router DHCP server. David

I was wondering why there were 3 routers on your local network. Are 2 routers connected to your internet service providers (ISP) router? Is the ISP router in modem mode and you get 2 public IP addresses from your ISP? To help me get a better understanding, could you post a hand drawn network...

I wonder if the 2 NVR LAN ports are like a layer 1 hub with the MAC coming from the NVR? Or some layer 1/2 hybrid. Some devices don’t like VLAN tagging. David

How did you assign the static IP addresses? I usually use DHCP MAC binding on the router for fixed IP’s and keep DHCP enabled on all devices. It makes router fail recovery a bit easier. Router backups help as well

is the switch managing your LAN and VLAN? Could you post a screenshot of the VLAN setup page and post the router model number? NVR and camera info would be good. are there any error messages or codes from the NVR and / or cameras? are you familiar with the OSI 7 layer model for networking? David