Great post I do like to have people point out when I'm wrong its how we learn after all. However I'm still sure interleaving would have been applied with a 10mb drop. After all G.inp which I really have not read up that much on so my knowledge is a tad lacking, mainly because my cab fails to use it, would apply interleaving to stabilise the line. G.inp (from my limited knowledge) is used to control low levels of errors without out the need to drop throughput I believed.
On my ECI cab I have gone from Fastpath level interleaving level 1 on the downstream to a interleaving depth 1087 with a 10Mb drop, after a initial gain of 3Mbps on the first day from 51Mbps to 53Mbps. So I still think Interleaving would have been applied with so many errors, although we cant see them we can assume they must be there and on the downstream, as my upstream is Fastpath level 1 still.
Interleaving isn't by the Huawei DLM.
All lines with modems that are capable of using G.INP, use it.
The DLM has put the line on a 6dB target likely with Retransmission High.
That's the highest target with the highest error protection.
Applying Interleaving would presumably be DLMs next step after increasing the target SNR if errors are still above its thresholds. It's just working back the normal way it progresses in the same steps.
It is indeed working back but it won't go to Interleaving.
It will sit stable on 6dB Retx High.
Should the chipset improve performance or the user switches back to the previous modem then the DLM should start working back down the targets and switch to Retx Low.