Have been patiently waiting for some sort of a change to take place but alas to no avail. I have now had a stable connection with the Netgear for over 8 days now and everything has remained the same.

Have raised the issue with my ISP who have advised that they can see my IP profile has been around 12 for the last few weeks (which I already knew!) and that my throughput speed had been averaging a lot less than 12. They asked that I run the BT speed test then into the further diagnostic mode which I did to enable them to progress the matter further with BT. They also mentioned something called a TAP3 test might be rqd after going into the diagnostic mode but it was not asked for.

Assuming my ISP are trying to sort this for me, what is a reasonable time to wait before asking more questions?

Quiet line test 17070 - Yes done that several times when this all kicked off. Nothing untoward on the line.

Thanks

Noise margin setting drops take 10-14 days stability, then goes down by 3dB (usually with an automatic resync) and starts the next 10-14 days.

Edited by RobertoS (Fri 22-Mar-13 13:33:45)

I have been having similar issues since last Sept/Oct. I ended up getting one disconnect a day (at any time), and each time the SNR went up, IP profile was reduced until I ended up with a profile of 1.5 mbs.

The last few months I have had engineers out, changed routers, swopped wires, re-routed TV aerials cables (clutching at straws) etc.

Finally I found out what was happening from my ISP techy. The DLM was seeing 100's of errors an hour, although at my end on the router didn't see or record as such. Hence, every time I did get a disconnect/resync, the DLM done it stuff and tried to make the line stable (due to the errors it saw) - and each time I just got slower and slower.

Having had enough I ended up getting the connection set to bog standard ADSL, and using tweaks on my router to rx & tx gain + reducing 'bits per bin' to 9, I now have a fairly stable line without any profile being applied if I do get a disconnect.

The thing to note is I now get 100's of CRC and header errors that didn't become apparent until I did get my connection reset to just ADSL (the rx & tx gain tweaks have fixed those - plus reducing bits per bin lowers sync speed which also helps). BT, of course, said there is nothing wrong with my line - but there obviously is.

Nick

Edited by deleted (Fri 22-Mar-13 14:29:59)

But the OP's line has held a connection for 8 days (?) and downstream sync is 12503Kbps, switching to ADSL1 would reduce the speed to 8128Kbps - or less since the downstream SNRM may remain at 12dB during another protracted stabilisation period.

Edited by 4M2 (Fri 22-Mar-13 14:43:34)

Yes, but I am not saying that. What I am saying is IF the DLM is seeing errors (irrelevant if the line doesn't go down and stays connected), then the NEXT disconnect it will apply an SNR increase to make the line stable due to the errors it sees (but you don't!). So you cannot win, no matter how long you stay in sync!

I think the technology is a bit dodgy, to say the least.

Nick

Edited by deleted (Fri 22-Mar-13 14:51:38)

In reply to a post by Lethe:

I think the technology is a bit dodgy, to say the least.

I don't have such problems on partial LLU (SMPF)

It would be nice to be able to log all the people who are getting similar issues that *just* starting happening like this. I have had ADSL for a long time, and my line was always stable, staying in sync for weeks ~ months at a time (with no or little CRC/header errors etc.)... until last Sept/Oct.

Then the OP starts getting similar issues in Feb.

Something got changed somewhere - whether this is to do with BT rollout of fibre or what I dunno, but I feel it has [censored] up a lot of peoples ADSL connections.

Nick

You seem to have missed the point that the line has stabilised since changing the router, with a huge increase in upstream sync taking place immediately.

That implies a fault of some kind on the replaced router.

It follows that there will be no DLM improvement for at least another two days, possibly six. IMO at the moment it is pointless do do anything but wait and see what happens by day 15.
_{Edit - and another typo corrected.}

Edited by RobertoS (Fri 22-Mar-13 18:16:52)

Seems to be particularly the case with Orange (EE or what ever they call themselves) at the moment with upgrades 21CN WBC...

Robert, been there done that etc. After BT enginner called, I sync'ed at 9500 odd - fastest ever. Then it slowly got reduced slower and slower...

I am betting the DLM is seeing loads of errors, so no matter how long you stay in sync, the next disconnect it will try to fix those errors.

Nick