@123421 I solved it on my own with the help from an other customer anserwing my question at Amazon: Go to settings / Advanced / Internet --> delete all entries in the table "internet settings". Then...

@123421 Additional information: It does recognize the cable. But the port is listed as WAN and not LAN3. So, there might be an option somewhere to switch that? Couldn’t find it yet…

I've got an NX200 5G router. I couldn't figure out how the LAN3/WAN port would work as an LAN port. The other two LAN ports work well. I didn't change something at the preset settings on port...