This monitoring was started at another address after reports of ‘the internet not working’. It seems to be the same issue as seen on my lines.

Noise margins – Line 3
Noise Margin Sync
06-10-17
05-10-17    
04-10-17
03-10-17
02-10-17
01-10-17
30-9-17
29-9-17
28-9-17
27-9-17
26-9-17
25-9-17
24-9-17
23-9-17