The router-modem doesn't recognize the installed NVR.
We receive no camera images anymore, even not via the subnet LAN. I know the NVR MAC and it's default IP address.
Modem: 24*8 DOC Wireless (Docsis) with Eurodocsis 3.0 (of the internet provider)
NVR: Hikvision DS-7604NI-SE/N and 4 Hikvision...