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Originally Posted by johnwileqs
clearly an upstream problem, you say it starts acting up mid morning until early evening. this being the warmest part of the day. warm weather = lower signal level and hence your modem which has been connected at 58 dbmv (MAX) for a motorola going off line. any good tech should sort this for you either by a repull to a bigger spec cable (eg RG11) or fitting a HDU or maybe both.
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I had a completely new cable put in last time it happened a year or so back. Then had to get another engineer out to actually connect the thing! (the cable at the time was split off the downstairs flat, now I'm on the new dedicated cable).
It made absolutely no difference to the upstream power with the new cable.
I've tried a different modem, no difference.
It was fine for about a year even at between 55 and 58, until NTL did some work recently.
Besides I've been told there are HFC problems in the area and it's being looked into.
Not that it really matters now as I've applied for a BT line for ADSL, but maybe if the real problem gets fixed it will sort it out for any of my neighbours. In the meantime if it gets fixed then at least I have broadband to keep me going, otherwise I'll just live with dial-up. I'm not wasting any more time on call-outs though (over the years I've wasted far too much time on NTL, none of which I can be compensated for).