[Gllug] Advice on ADSL line attenuation and noise margin

[t.clarke]

I don't think there is much you can do about the line attenuation or noise
margin numbers!
Line attenuation is a presumably a result mainly of the distance you are
from the exchange (as the wires run - eg my home is much closer to the exchange
than the 'wire distance' due to the wires taking a longer route to get across
the local stream!).
I believe the noise margin is set my the DSLAM - but am open to correction
on this!

My brother recently purchased a new master socket with built-in microfilter,
specifically designed for 'longer distance' connections and saw an immediate
significant improvement over his previous separate microfilter arrangement.
So it is quite possible the quality of the microfilters will have an affect
on these figures as well!  Certainly in my experience microfilters can be a
significant factor in determining connection quality.

Tim
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