Hi Welcome to the community forums
Have you tried the quiet line test dial 17070 option 2 you should hear no noise if you can hear noise then it needs reporting to BT faults on 151 with no mention of broadband
in the call are you connected to the test socket using a new filter
if using a hub 4 locate these lines located in the hub logs
Lines should look like this
19:11:29, 07 Nov. (2290101.460000) DSL noise margin: 7.00 dB upstream, 6.10 dB downstream
19:11:29, 07 Nov. (2290101.390000) DSL line rate: 448 Kbps upstream, 288 Kbps downstream
if u The stats for the Home Hub 6 can be found on the Information page from
http://192.168.1.254 then Advanced Settings -> Technical Log.
Can you run this checker and post back a screen shot of the results. Make sure you delete your phone number before posting.
http://www.dslchecker.bt.com/adsl/adslchecker.welcomeCan you use this speed tester then carry out the further diagnostics and post back a screen shot of all the results including your IP profile for up and down.
This test must be done with a wired connection.
http://speedtest.btwholesale.com/once you have posted the information asked for then the community members can help you more
Thank You