As the Anon poster said 20 minutes ago, it isn't the exchange raising the noise margin.
It is some huge noise event occurring, causing your router to disconnect, then reconnect at the low speed because the noise is still there. The noise margin gets set to 6dB at this point. Then the noise stops so the noise margin goes extremely high.
For more explanation see this page
and this one
, then the rest of the pages in my Troubleshooting
section except Router acting oddly
and Odd speed test results
Make sure you don't get mixed up between the throughput speed you get and the Speed down
shown in your stats. Be does seem to be having a few speed problems in some areas at the moment, but I don't think people are getting low connection speeds like you. So theirs is a different issue.
Does the same thing happen with the BeBox? If that is bust, have you any other you can try?
Did this start before Christmas lights started showing up near you? Have you got any new, or replaced any old, electrical or electronic kit, or moved things around?
My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost
. Internet connection -
IDNet Home Starter Fibre. Live BQM
"Where talent is a dwarf, self-esteem is a giant."
- Jean-Antoine Petit-Senn.