On 25/08/2013 11:37, Mike Tomlinson wrote:
En el artículo , polygonum
escribió:

17070 works on BT lines. Try the quiet line test.

You say she has a microfilter, so she has broadband. Is that working
ok? Has the line sync speed changed?


If she *does* have broadband you could perhaps set up "JDs Auto Speed
Tester" or one of the other testers which log ADSL data. Logging say
every quarter of an hour for a few days should show up if there is noise
which varies as you describe, which gives you physical evidence. You
might also chase the ISP if the performance is outside what they claim
for your postcode in the advertised link.