be broadband unstable

my broadband has always been very stable but the last 6 weeks my broadband cuts out every 1/3hours. i was on an 3db profile before getting 12meg but bethere have not changed my profile too 9db profile too see if it stops the cut outs which it hasnt stopped it at all. i have only 1 socket it the house,i have it plugged in the test socket,have changed the router and filters. also have no sky plugged into the socket.bethere say there no fault on my line which i dont think is true because my line was fine 6weeks ago. i have also done a quiet line test with a none cordless phone and found no noise at all on the line. here for my router stats,

DSL Connection
Link Information
Uptime:
0 days, 1:21:24

DSL Type:

G.992.5 annex A

Bandwidth (Up/Down) [kbps/kbps]:

1,148 / 8,539


Data Transferred (Sent/Received) [kB/kB]:

0.00 / 0.00

Output Power (Up/Down) [dBm]:

12.0 / 18.5


Line Attenuation (Up/Down) [dB]:

18.0 / 34.5

SN Margin (Up/Down) [dB]:

11.0 / 9.5


Vendor ID (Local/Remote):

TMMB / BDCM

Loss of Framing (Local/Remote):

58 / 0


Loss of Signal (Local/Remote):

5 / 0


Loss of Power (Local/Remote):

0 / 0


Loss of Link (Remote):

0


Error Seconds (Local/Remote):

5 / 0


FEC Errors (Up/Down):

0 / 1,028


CRC Errors (Up/Down):

0 / 1



HEC Errors (Up/Down):

5,076 / 0

All looks fair enough except for the

Loss of Signal (Local/Remote):
5 / 0

I'd have gone for dodgy filter followed by dodgy router but you seem to suggest you've tried different stuff.

Anything new in the house in the last 6 weeks that could be causing some sort of interference?

I suggest you upgrade to the latest firmware.

Looks like you have a noisy line too, probably on your side of the master socket so your responsibility.