The modem levels are high but ok - regardless of Telewest or ntl the modems are now the same, as are the tolerances and while above 12dBmV might not be ideal it's satisfactory so long as the SNR is reasonable.
The issue is oversubscription, diagnosable from these bits:
Quote:
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It's OK in the mornings (before 12pm) but from then on it just goes downhill and stays crap until well past midnight.
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Quote:
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2 56 ms 57 ms 57 ms 10.123.192.1
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Power levels being marginal will cause slow speeds due to packet loss, and intermittent loss of service rather than a continuous pattern of poor performance during higher loading times tailling off well after peak times.
---------- Post added at 13:26 ---------- Previous post was at 12:49 ----------
Is this your post on the newsgroups OP?
Quote:
Hi Yan,
I'm sorry to hear you're having problems with your connection speed.
Your downstream power level is very high, however as you are still able to
maintain a 10Mb speed at certain times of the day this would not appear to
be causing you any problems. I have taken a look at your local network and
can see that the load on your UBR is very high at times and have passed this
to our network team to investigate. We're sorry for the inconvenience
caused.
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EDIT: Never mind I actually read the post in full - it is you. Glad they had some answers.