Bypass the router by connecting a PC direct to the modem and see if you may have ISP or modem issues. (ISPs always say that). Reconnect the router and if you loose both bands, try a factory reset and...

One other thing. You may want to add wire for connecting smoke and CO detectors together as well as the hard wired power source. Some models can be connected wireless but with wired models, there...

What kind of issues are you having?

I would also use Cat6 as Cat7 would be way over kill and Cat5 does not allow growth room and cost benefits. If you plan to place the router in a place other than the your main office area, I would...

Is your firmware up to date? This is one of the TP-Link routers that had the WPA2 (KRACKs) vulnerability.

The issues could be caused by slight differences in the way each brand handles the repeater specifications for connecting devices. Best to stick with a single brand. Be sure the firmware is up to...