doesnt it need to be plugged into a phone socket also? Point is, the phone socket is in the hall, so thats where the hub would have to go. Just wondered whether the pc, at 15feet from the phone socket in the hall, is too far away, or would that distance be ok?
It may work ok but as it ground floor walls have more effect on stopping it. Mains plugs are not limited. To give an instance on my setup. My main BT socket is as yours near front door at ground level, I then run a Extension wire from a BB filter and use multi wire telephone cable I slit the cable in that I use to wires for BB and two for Phone The Extension is over 100ft long and I get nearly 7gb download at 1.8miles from Telephone Exchange. My Router is upstairs this gives a wider Coveridge