Do you realise this thread is 2 years old?

That is almost a spam post.

There's no way the filter can work as the DSL connection is unfiltered - only the phone connection is filtered.
Looks like it was designed by someone with too much time on their hands.

That is almost a spam post.

Yep, that had crossed my mind too.

Actually he is filtering out in the ADSL2+ frequency bands, as he says not for user with ADSL2+ or more accurately ADSL2+ where there is any usable signal above 1 MHz as his filter will be removing it.

Bookmarked as an example of how radio hams can interfere with ADSL services