Along with the above, I suggest you collar a BT engineer and ask him for a primary wall socket with built in filter. No need to fit any filters on any of the other sockets. Also, if you're with BT and recently had broadband from them, and you live a distance from the exchange, check they haven't capped you at 512. They restrict it without you knowing. The engineer check will find this or phone and ask, and only the engineer coming out to your property seems to be the way to get the muppets to remove it. I wasn't even aware it was capped at 512. Anyway, once they cleared this cap, I got up to 5M initially but now run somewhere around the 4Mb mark. A big improvement. BT are !!!!!!!! Their customer service is appaling. They treat you like dirt. Indian call entre is a joke. Same script, different day. As I say, broadband problems, get te engineer out, it saves so much hassle in the long run.