I currently live in a house with only 1 BT socket to the outside world (don't blame me, I just bought the place, doh!)
Anyway, I have my external land line, 2 sky boxes (multi room don't you know) and hard wired broadband internent connected. These are all hanging off various adaptors and splitters to the single BT socket. Tried to set up free wireless option from Orange Livebox (I know!!) and guess what....every time I try to connect, the signal either fails or does not recogonise the network. Also, when the phone line rings and I am still on line, no issues when call is answered but when call disconnected, all connections to broadband drop off and reconnect manually after 2-3 mins.
Have great laptop on order but no point until wireless issues resolved