My devices keep going offline

Panoramic Wifi Gateway

Brand: TECHNICOLOR

Model: CGM4331COM

They go offline.

Do they go offline at the same time while other devices are online? If so, that is weird. I wish we could see the router logs to tell what's happening. Also, does it happen every 2 hours? If so, I wonder if it could be related to the DHCP lease.

They don't go offline at the same time.  It's a random issue.  They can go offline at anytime.

Funny, I have a Brother printer(MFC-J470DW) and it doesn't require a static. I just look up the IP on my router's network map and enter that IP into a browser. Maybe you mean for a direct connection to the printer?

It's not required but DHCP can lose the mapping to the printer manager of the printer.  The first step to troubleshoot is a static address.

I'm unsure about the DVR...perhaps an IP conflict with the printer and Contour can't inform you of the conflict.

I was going to suggest a static IP, or at least a DHCP reservation, but I don't think that will work with a DVR and a gateway. Maybe Cox can see the logs remotely and tell what's going on.

I also wonder if this has anything to do with WMM power save. The DVR and Printer are two devices that would be connected but in a idle state for long periods of time.

Yes...all that.  Printers use a lot of power, go into a deep sleep and lose its IP.

Why is the router assigning an IP to a DVR?  A cable-box would be on a different network.  Must be a wireless cable-box.

We have a number of computers on the network and if I use a static IP, each device has no problem printing. If I go with a dynamic IP, I can connect when I am ready to print, but that's a nuisance for my wife who works from home on a corporate device.