Well the BT Engineers been and gone. From my master socket he could see the drops when he had his test equipment plugged in, said he would test from the cabinet. He also said that he could see the drops from the cabinet but the answer to the problem is to increase the SNR margin yet again. So TT have now increased the margins which does seem to have stabilised the line from what I can see but the net result is that where I used to have down speeds of around 7100k I now have 4700k and where my up speeds were 700k it's now 491k.

The Engineer watched routerstat for some 10 minutes and it was flat, 10 minutes after he left it started pulsing to 0 but luckily he was still in his van, went to see him and he said that he was told that it take a good hour before the changes would take effect so there was nothing else for him to do.

Hmm, I'm not too convinced but the Engineer is convinced that there is nothing he can do and that he really shouldn't have been called out.

Well some success to report.

I've had my profile changed to interleaved 12db 8M and the spiking on the upstream stopped, so they changed it to interleaved 9db 8M and the spiking started so I then checked the router settings and changed the router from Auto to ASDL (G.DMT) and the upstream SNR margin is now completely flat. I'm currently on a 6db profile with flat snr margins. The line did re-sync some 4 hours ago but I'm wondering if that's when the line went from 9db to 6db.

Going to monitor it today, here's hoping that the line is back to normal and I hate to say this but the Engineer from yesterday and what he said could have been right

Sounds good. But also sounds like you could get a hefty BT bill

I hope not, TT were seeing CRC errors, the engineer also confirmed that he could see CRC errors on the line, although there weren't as many as TT had reported, his words not mine, whatever that means.

CRC errors are a normal part of ADSL though...

Hmm, will have to wait and see if they do try and bill me but the line is still stable, hope I'm not tempting fate by boasting

Remember to let us know how your get on!


NB. I updated my low snr page today with an up to date RouterStats graph...

The line is still stable, have got my speed back too, back on a 6db profile and syncing at around 6848kb/s down and 832kb/s up

That good to hear! It feels great when a broadband problem is sorted


You probably won't know for many weeks whether BT will bill you or not.
When your ISP arranged the engineer did they go through all the warnings about possible charges?

Nope, I was getting peeved off at the time and I think I'm right in saying that it was them who suggested that an engineers visit is needed.