I need some advice on improving my home broadband. It’s a pretty odd setup: the router lives in a cupboard opposite my front door. It receives broadband via a coaxial cable, but then the ethernet sockets in the router feed cables which go up into the ceiling and, via various forms of black magic and trickery, supply connectivity to Ethernet sockets throughout my flat.
The WiFi is dogshit at the best of times (basic ISP-provided router), with a noticeable slowdown around 5PM when everyone comes home from work. But if I hard-wire a device into the ethernet sockets around the flat, I usually get pretty good performance (100mbps+). The flat has 2 floors and is quite long, so there are 2 rooms that the WiFi just doesn’t reach.
There are also coaxial sockets in most of the rooms. One of these coaxial sockets feeds our cable TV box, which also has a Netflix app. Even when the wifi and the ethernet sockets are failing to work, Netflix on the TV box usually works.
So, my question is: what is the best way to get wifi throughout the flat, whilst retaining the use of those hard-wired ethernet sockets? Could I plug a second router into one of those coaxial cables, or should I just buy a bunch of repeaters?