Unresolved support ticket open for more than six months - RESOLVED: after 8 mths
Thanks for all the comments, guys - I'll look at these this evening.
PN support have now told me that BT's Complex Faults Team has not in fact been engaged and that the CFT won't accept the fault until BT engineers have addressed all the following issues:-
To my knowledge, BT have only done the tie pair mod, fitted an RF3 filter and a new SSFP. I've agreed to another engineer visit next week, but I'm fully expecting that they'll only tick off one of these items at a time (due to the 2h limit) and it will take another 3 or 4 visits (at least) before CFT will get involved.
And the note about "All improvements possible made to the wiring entering your premises (RF3 filter, SSFP, etc)" just reinforces the points that @anotherone (and others) have been making about replacing the dodgy cable running to the RF3 filter, and also replacing the drop cable etc.
Can one of the PN guys who monitor this forum chase this up for me, please, as I'm really concerned that BT has been seriously wasting everyone's time i.e. you would have thought that, after 7 or 8 visits, at least most of these improvements would have been made by now. I'm getting a bit angry now, so time to walk round the block I think
PN support have now told me that BT's Complex Faults Team has not in fact been engaged and that the CFT won't accept the fault until BT engineers have addressed all the following issues:-
Quote * D-side (Distribution) cabling pair changed / replaced
* E-side (Exchange) cabling pair changed / replaced
* Tie Pair Modify
* Lift and Shift
* All improvements possible made to the wiring entering your premises (RF3 filter, SSFP, etc)
To my knowledge, BT have only done the tie pair mod, fitted an RF3 filter and a new SSFP. I've agreed to another engineer visit next week, but I'm fully expecting that they'll only tick off one of these items at a time (due to the 2h limit) and it will take another 3 or 4 visits (at least) before CFT will get involved.
And the note about "All improvements possible made to the wiring entering your premises (RF3 filter, SSFP, etc)" just reinforces the points that @anotherone (and others) have been making about replacing the dodgy cable running to the RF3 filter, and also replacing the drop cable etc.
Can one of the PN guys who monitor this forum chase this up for me, please, as I'm really concerned that BT has been seriously wasting everyone's time i.e. you would have thought that, after 7 or 8 visits, at least most of these improvements would have been made by now. I'm getting a bit angry now, so time to walk round the block I think
Quote from: Catweazle CFT won't accept the fault until BT engineers have addressed all the following issues
That might not sound like progress, but it is in fact.
It's a list of things that BT acknowledge (may) need to be addressed, so it's a target to be aimed for.
But, you're right, they will probably do them one at a time. I certainly would, it's standard practise when investigating a problem and assists with identifying the cause.
True, but it would have been nice to have seen the list a few months ago i.e. why does it take 7 or 8 visits to tick off 3 items from the list? Still a bit annoyed, but at least the sun's shining 
Thanks, orbrey - I've not heard anything from PN support since this morning, though.
Sync rate was just 160kbps (with a 15Db noise margin) when I returned from work, so I rebooted the router. This didn't help much as the sync rate increased to just 192kbps (noise margin remained at 15Db, so I guess that's the new target). The DMT graph has loads of gaps
I tried using the AM radio to try to find interference sources (as @anotherone suggested earlier) and found various degrees of buzzing at the following (approximate) frequencies 520, 600, 650, 710, 790 (this one sounds more like very rapid morse code), 990. I'll check again (probably tomorrow) when (if) the sync rate improves appreciably i.e. to see whether the buzzing is still present at those frequencies.
Sync rate was just 160kbps (with a 15Db noise margin) when I returned from work, so I rebooted the router. This didn't help much as the sync rate increased to just 192kbps (noise margin remained at 15Db, so I guess that's the new target). The DMT graph has loads of gaps
I tried using the AM radio to try to find interference sources (as @anotherone suggested earlier) and found various degrees of buzzing at the following (approximate) frequencies 520, 600, 650, 710, 790 (this one sounds more like very rapid morse code), 990. I'll check again (probably tomorrow) when (if) the sync rate improves appreciably i.e. to see whether the buzzing is still present at those frequencies.
Good grief, that's gone really bad.
Surely with that evidence PN can get BT moving into 2nd gear.
Surely with that evidence PN can get BT moving into 2nd gear.
Quote from: Catweazle I tried using the AM radio to try to find interference sources (as @anotherone suggested earlier) and found various degrees of buzzing at the following (approximate) frequencies 520, 600, 650, 710, 790 (this one sounds more like very rapid morse code), 990. I'll check again (probably tomorrow) when (if) the sync rate improves appreciably i.e. to see whether the buzzing is still present at those frequencies.
Have you noticed that those gaps are mostly about 60KHz apart?
Quote from: Catweazle The DMT graph has loads of gaps
That's unbelievably bad. Or, in the circumstances, unbelievably good... Surely a graph like that has got to make *someone* at BT take notice? Maybe even do more than one fix at a time.
Quote from: Catweazle I tried using the AM radio to try to find interference sources (as @anotherone suggested earlier) and found various degrees of buzzing at the following (approximate) frequencies 520, 600, 650, 710, 790 (this one sounds more like very rapid morse code), 990
Did you use a digital-tuning AM radio? When I used an old manual tuner, I found it hard to distinguish between any particular noises.
Anyway, if you're actually getting some noticeable noise out of the radio, then I'd also suggest recording it. More evidence that BT will find hard to ignore...
I bet the morse code says
Quote Your broadband is broken.