There are changes that have been implemented with the new downstream SNR margin's. Oh, and yes I do know the downstream rate is still banded, but the amount of banding has been decreased by DLM, so something has changed. In the past, DLM wouldn't even decrease the amount of banding.

Edited by deleted (Sat 25-Mar-17 10:54:11)

>In the past, DLM wouldn't even decrease the amount of banding.

So no-one ever had banded reduced or removed before the current changes?

Banding has always been changed incrementally.

Yes, especially recently! There was an update to the DLM which caused banding on lines to be stuck.

Edited by deleted (Sat 25-Mar-17 11:22:38)

No, not always.

What makes you so sure?

Edited by deleted (Sat 25-Mar-17 11:34:20)

It may be a deliberate policy to prefer reduced sync speeds over the horrors of interleaving, if given the choice I would certainly pick banded over interleaving.

Of course on hauwei cabinets I would expect interleaving is now uncommon so banding may be overkill on hauwei lines.

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.

No idea where you get the idea that all banding sticks. Just because your line stuck doesn't mean everyone's does. You need to go back and read the post by darrellr that you commented on. He was discussing banding being removed in January.

Could you point me to something that shows other changes to DLM? A post somewhere official, something from OpenReach? The SNRM changes are the only changes documented.

G.INP on Huawei normally has interleaving at 8/1. Occasionally 12/1 or 16/1. Some modems can report n/4. However the "delay" parameter is zero.

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