Well, I have something similar to this;
Clarity - UK ADSL BT Linebox Adaptor Faceplate
On my master socket in my house - it looks just like the one in the picture. However, what I didn't know, is that you don't need to put filters on all the other phone sockets if you have one of these thingies.
Inevitably, yes, I have put them there. :P Since there is some effort involved unplugging them again, I thought I'd best ask first. Should I remove the extra filters? Both also have Sky boxes plugged into them, if that makes a difference.
I'm just wondering if doing this could see any improvement in my speed or anything.