Lately I've become convinced there is no fault with the line but the problems are Coms/equipment related.
One day upstream SNR will suddenly creep up from its normal 8 to around 28 whilst downstream SNR doesn't move.
The next day I'll have 40% packet loss, but the day after that its fine again.
Then I'll have no connection for 3 or 4 days, but suddenly it comes back and works fine for a fortnight.
Once downstream SNR goes below 4, it will keep dropping until it goes into negative numbers then the connection will keep dropping, then re-connecting at 4dB, then drop back into negative, disconnect, and the cycle continues.
I'll contact Coms who'll put me on a historic profile and downstream SNR goes back to 8 or 9 and stays there and is fine for a while.
All these issues happen independently of each other, but at all times one of them is causing connectivity problems.
At 54dB my line attenuation is on the high side, thus the line seems sensitive to these various fluctuations in other parameters.
Then I'll get "connection drops" yet the router stays syncing throughout, but there's no internet connectivity.
I'll get a few days with every website returning DNS errors, but I can download emails or run programs that stream data with no problems.
The only fault that's ever been found on the line by BT was high resistance at the DP due to corrosion and that was fixed, but the problems still keep occurring.
You are correct - I'm on full LLU (Talk Talk equipment). I once said I'd never take broadband with Talk Talk due to rude customer service I once received, so by dumping Coms I'm getting rid of any reliance on them too - 2 birds with one stone.
Edited by deleted (Thu 29-Jan-15 08:22:15)