OK...the thing I want replaced is the little box where the BT phone cable first comes in from the outside (it's ancient and manky and also in a stupid position). Hope it's not a stupid question, but can I change this myself? I looked in Wickes and B&Q and they sold nothing resembling it, so I was a bit worried that maybe I would have to ask BT to change it (which they would no doubt charge shedloads for!).
Then saw one of these - is this the thingy I need?