Thanks @imjolly, that’s good to hear that the fibre installation isn’t a potential cause. I’m hoping to switch to fibre as soon as available, I just hope this problem doesn’t follow.
Thanks for the banded profile link. So I think it’s safe to say that the underlying issue hasn’t been fixed by Openreach! The continuous erratic noise margin resulting in a banded profile is still present and will continue to cycle round until the cause is fixed.
Robbie, the mod originally looking after this case said to post back if things don’t change, so I hope he sees this.
when you switch to fibre then you are eliminating the copper cable from the exchange to your street cabinet and only leaving from cabinet to home as copper so hopefully that will eliminate the noise peoblem
Unfortunately still haven’t heard from anyone at BT!
I’m at 10 days connection with banding still in place because of SNR fluctuations.
Is anyone available to take a look at this please?
Router stats and SNR graphs below.
|Line Rate - Upstream (Kbps)||864|
|Line Rate - Downstream (Kbps)||3072|
|Default Gateway / IPv4 Address||pppoa0 (DSL) /|
|Connection Time||10 Day(s) 17:12:51|
|Link Power State||L0|
|Line Coding (Trellis)||On||On|
|SNR Margin (dB)||24.9||9.0|
|Output Power (dBm)||18.8||12.5|
|Attainable Rate (Kbps)||4920||1004|
|K (number of bytes in DMT frame)||97||28|
|R (number of check bytes in RS code word)||4||4|
|S (RS code word size in DMT frame)||2.00||2.00|
|D (interleaver depth)||8||4|
|INP (DMT symbol)||0.08||0.06|
|Super Frame Errors||8362||2369|
|RS Correctable Errors||5361||5|
|RS Uncorrectable Errors||2595||0|
the new graphs are showing a more stable noise margin apart from the odd dropps which some are quite significant. I think if you were to get out of banding then these significant noise margin drops would be enough to drop your conenction and if continued would put you back in a banded profile
any idea when fibre is coming to your area http://dslchecker.bt.com/adsl/adslchecker.welcome enter your phone number and see if anything
That’s the thing, I can get a day where the SNR is very steady like the Friday 18th May example above and then the following day I get quite a dramatic burst or series of them.
That’s exactly what keeps happening. OpenReach reported that the fault had been fixed but the SNR is still dropping too extremely which means I keep going back into a banded profile.
The availability checker just shows ‘Planned’ for fibre availability, which is a bit vague. I’ve pressed OpenReach for a date but they couldn’t commit to one which is understandable. CodeLook says April 2018 for Cab E5 and July 2018 for Cab P5.
My banded profile has now been lifted after 13 days connection and 3 days of fairly (but not perfect) stable noise margin. However, I fear banding will be back if this noise issue resurfaces.
I’m now synced at 5.4 down, 832 up with a SNR margin of 16dB down, 10dB up.
On a side note regarding the fibre cabinet - I noticed the silver lock on the new cabinet on Monday, however, it could have been there longer. Going by other people’s experiences, it usually takes 1-4 days from that point but I understand it can take longer. Availability checker is still showing ‘planned’ and OpenReach is saying ‘Activate’ so my fingers remain crossed that it will be in the next few weeks.