Hi
In reply to:
The screening won't make things worse, although not as useful as it would have been if grounded it still makes a difference. Try putting your mobile phone in a baked bean tin and see how well the signal works.
My mobile phone works just fine in a tin.
We are talking different frequencies for a start. The screen without earthing at both ends acts just like an antenna, it picks up radio waves of the AM variety but with nowhere for them to go they are transferred to the wires running in it! For the sort of frequencies ADSL runs at the screen isn't much use unless it is grounded.
When you consider the telephone cable has travelled perhaps thousands of meters being completely unscreened in bog standard bundles of cheap and cheerful telephone cable, just what different will a few meters of correctly terminated screened cable make, not a lot.
Regards
Phil
Edited by deleted (Fri 13-Jun-08 22:14:10)