Just moved into a property. My router establishes a connection to my isp when connected to the master socket and test sicker. However when connected to an extension in another room it doesn't connect/sync. However the phone gets a dial tone in all sockets. The master socket has an adsl faceplate on. I'm wondering if the way the master socket is wired the dsl signal isn't going to the extensions? Can anyone offer any advice on what I need to change to get this to work? The extensions where put in during the house being built around 20 years ago.