@giesk910 Contact your retailer (if under warranty) or your local support - the RE may went faulty.

@Eddie2024 Onemesh is TP-Link proprietary technology. To be able to build Onemesh you need a Onemesh capable router and range extenders. Easymesh is a new standard that most of mesh capable routers...

@bonestaak If you use the Omada controller I believe that should do it.

@luft It's hard to predict whether the switch would work properly. Of course there would be a voltage dropout due to the cable length and it may or may not work - the only way to check that is to...

@HarveP Your modem router is an ISP provided device and it's not supported by the community as @David-TP already pointed. Hence your only option is to chase your ISP about the VoIP configuration...

@bonestaak Your Pi hole DNS IP address can be set here: