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**The Natural Philosopher** · #17 July 3rd 08, 09:53 PM posted to uk.telecom.broadband

wrote:
Out of curiosity can anyone throw
any light on why after a short burst
of noise, your ADSL speed is significantly
reduced, and takes a long time, which can
be one or more days, to recover.
The initial reduction of profile I can
understand, speed is reduced until the
error rate makes best use of the line.
A slower connection with a stable 10% error
rate being better than a faster connection
with a 98% error rate, the latter spending
most of the time error correcting and
retransmiting errored blocks/packets.
What I can't understand is why when the
noise burst ends, and it may only last
a few seconds or less, your former
faster speed is not quickly restored,
within a few minutes rather than after
one or more days, even though thoughout
this time your modem/router is showing
a steady 15 or 16db SNR.

resynch your router. It wil come up fast and relaible.

HOWEVERE beware teh dreaded BRAS profile. BT doesn't buffer in its
DSLAMS so they will lower the BRAS rate to the lowest rate you have been
ables to sustain for a period.

That WILL take days to recover from.