I am about to install a basic telephone socket extension (as my main telephone socket is in the hallway and my PC (eventually) will go int the livingroom, which is about 10 metres away. I plan to run a 25 metre extension out through the external wall (as I have already laid my hallway floor and so can't install the flat telephone cable under the floor - and don't want to drill holes through doorframes) by my main socket and round the outside of the house coming in through the external wall to my living room and to my pc. I seem to remember people explaining how to install the broadband filter!!!! somewhere. But where would I put my filter ?? Would it be on the end of the extension or in between the main socket and the extension ?? Also I plan to have an inline second socket next to the extention socket in the living room for the telephone. Would this arrangement work ??