the master socket still has your internal wiring connected which may cause noise problems whereas the test socket eliminates all internal wiring
that's your choice so up to you how you progress
if you have a noisy line then report a fault
Ok I have checked every extension to see if they have ADSL filters and they all do but still getting a lot of noise, also done the quiet line test and is very quiet, could it be a faulty router?
Sorry for being a bit arrogant, just frustrating having constant problem >_<
An engineer has checked the test socket several times over the last 3 months and the master socket is in constant use by my phone
but whenever i use the master socket (in an inconvenient cupboard) i can never connect to the router