yeah I meant legacy interleaving.

In reply to a post by WilliamGrimsley:

All you have to do is look in SIN 498, it's all in there.

I think you need to read it again then. The only thing new related to DLM in SIN498 is the following

1.2.2 VDSL2 noise margins Currently the default target downstream noise margin is set to 6dB. From March 2017 the target downstream noise margin shall be set to either 3, 4, 5 or 6dB � the actual value shall be determined by the Dynamic Line Management (DLM) algorithm based on line stability.

http://www.sinet.bt.com/sinet/sins/pdf/498v7p3.pdf

Edited by j0hn83 (Sat 25-Mar-17 13:03:50)

I know it only says that, but a new DLM system would've been introduced to allow for the new downstream SNR margin's! Anyway, let's enjoy this sunshine, I cba to deal with all of this rubbish!

Edited by deleted (Sat 25-Mar-17 13:56:08)

That's just your assumption. It's much more likely the current DLM system was tweaked to accommodate the lower downstream SNRM target. It's a huge leap to assume the entire algorithm has been changed, the way banding is handled, and some new 2 day stepped approach added.

MDWS still shows DLM taking action daily when required. Your line may have dropped the SNRM target in 2 day stages, but on other lines we see 3 or 4 days between drops in target SNRM.

Unless you know for a fact something else has changed with DLM then suggesting such changes have occurred is likely to cause confusion for others.

I guess we'll have to disagree with the other poster, as while some lines have been seen to stick, others have been seen to have banding relent

Reading into specification documents information that is not there is a dangerous game to play and leads to urban myths perpetuating for many years potentially

...and finally!!

08:37:03, 26 Mar.
DSL Link Up: Down Rate=79999Kbps, Up Rate=19999Kbps; SNR Margin Down=15.0dB, Up=15.6dB

23rd December 09:00 resync to 22400/5999
24th December 08:40 resync to 25000/7240
25th December 07:45 resync (G.INP reduction?)
26th December 09:12 resync to 27400/8496
27th December No resync
28th December 07:29 resync to 29999/9999
29th December No resync
30th December 06:58 resync to 32400/11999
31st December No resync
1st January 08:00 resync to 34999/14999
2nd January No resync
3rd January 06:46 resync to 40000/16999
4th January No resync
5th January 12:30 manual reboot - resync to 44000/19000
6th January No resync
7th January 04:56 resync to 49000/19999
8th January No resync
9th January 06:48 resync to 55000/19999
10th January No resync
11th January 06:54 resync to 60000/19999
10th January No resync
11th January No resync
12th January No resync
13th January No resync
14th January 07:15 resync to 66999/19999
....
24th March 08:17 resync to 74000/19999 (SNR 20.4 db)
26th March 08:37 resync to 79999/19999

Current stats

6.Data Rate:19999 / 79999
7.Maximum Data Rate:31629 / 124412
8.Noise Margin:15.6 / 18.0
9.Line Attenuation:15.9 / 13.5

How comes the attenuation in those stats doesn't match that in your sig ?

The attenuation seems to be measured differently on the BT router compared to the original talktalk one

See, I told ya! His downstream rate isn't banded now!

You told me what exactly?

In reply to a post by j0hn83:

It's always been the case that banding removes itself on some lines, partially removes itself on some lines, and just plain sticks on other lines.

Banding has ALWAYS removed itself in stages on most lines. It's only a small number of lines where banding sticks permanently. The OP's banding has been slowly decreasing for months.

I don't know where you got the idea that all banding is permanent. Your banding was so bad because you did something stupid that made DLM think your line was very broken.