On Mon, 06 Aug 2018 14:46:40 +0100, charles wrote:

Filters are the sort of thing you just fit and forget.

To some extent yes, but they aren't all created equal. Many moons
ago
I did the research on what was (then) the "best" face plate ADSL
filter. Bought the one that had the most consistent good reviews,
fitted it. Yep during the day if allowed good speeds maybe 500 to
1000 kbps faster than the fliter I was using. But at night it
couldn't sustain that rate and the modem would retrain to below
the
rate the other filter could sustain day or night. The modem
wouldn't
retrain back up at dawn either so you were "stuck" at the lower
rate.

might that not be caused by the overloading of the local network?

What has that got to do with the speed that the modems have
negociated as the best they can do for the line conditions? ie layers
1 and 2.

--
Cheers
Dave.