There were indeed two different types of DLM reset.
A hard reset that completely clears any profiles and the line enters an open profile without any DLM restrictions including interleaving, g.inp or banding. Within 24hrs it then goes to default of interleaving, then g.inp for the Huaweis and FAST for the ECI's (if stable). The soft reset (usually) doesnt clear any banding and g.inp for Huawei.
That was indeed the case from the initial G.INP rollout.
Openreach must have resolved the issue of the DLM having to work out if a modem supported G.INP or they now just don't care about modems that don't support it.
Huawei lines now start with G.INP and retain it on a DLM reset or migration.
That only changed a couple years ago after an initial trial then an extended trial.
This briefing is to inform CPs that we'll be deploying a change to apply ReTransmission to lines on day 0 where supported.
Dynamic Line Management-ReTransmission on day 0
I was under the impression that all new provisions (which can include ISP change) went through the Open profile, however I am not up to date with whats happening atm and you are in a far better position than me when it comes to whats happening in the real world right now and I bow to your observations.
Interleaving is definitely the default on ECI lines for new provisions.
That started in Feb 2018 for some tiers and was extended to the 80/20 package in August 2018.
https://www.ispreview.co.uk/index.php/2018/08/openreach-extend-low-level-error-correction-to-new-80mbps-fttc-lines.htmlDLM resets are a bit of a dark art now, which I assume includes some migrations.
Provider initiated resets usually keep the current profile while engineer resets tend to put lines on interleaved. That's clearly not always the case though, as seen from Chrysalis' line.
I've never understood the whole hard reset/soft reset thing either or how some engineer resets have different outcomes to other engineer resets.
There have been no recent changes to the DLM this year but in 2020/21 Openreach put out a lot of DLM related briefings with lots of trials and changes.
They made changes to the "Standard" DLM policy, they held trials on retaining the current DLM profile for product moves, introduced Retx on day 0, added/trialled a new stability policy, trialled MTBR changes, trialled higher levels of Retx and started/stopped half a dozen ISP DLM reset schemes.
If you can keep up with all that you're doing better than me
Nothing regarding G.INP on ECI for a long time either.
I don't think that's ever going to happen now.