[Gllug] UK hit by major ADSL outage

John Hearns john.hearns at framestore.co.uk
Wed Nov 21 13:47:10 UTC 2001


On Wed, 2001-11-21 at 13:00, Richard Cottrill wrote:
> Tapping a phone line isn't that hard... 

I wonder about tapping an ADSL line???
ADSL works by putting in filters which allow a normal 
voice call to take place alongside the ADSL data 
which is sent at higher frequencies.

I would guess that installing a tap on the line would
alter impedances, and so disturb this filtering.
I might be wrong though - an inductive tap, ie.
coils wound round the phone line might work.

Have a look at


http://www.adsl.com/PressRoom/adsl_vs_cable.html


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