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[Ronski]

@Chrysalis, there's something a bit weird on our estate, houses next door to me and nearby get roughly the same estimates, but a small cul-de-sac  slightly further away from the cab has half the houses showing 70Mbps estimates when I last checked. BS has checked my line route and confirmed it as 450 meters but couldn't access the records for what it's made up of. Whilst the  speeds are not fabulous it does us perfectly well, so I gave up chasing for improvements.

[Chrysalis]

yeah its odd for sure, either you got a fault somewhere or the official records are wrong (not impossible).

But end of the day what counts is if you happy with it, and you are so its fine I guess.

[lcl00]

And... now it's broke again.  A BT engineer decided to pay a visit to fix another line connected to my DP and decided to disconnect and reconnect my line countless times - great.  Now DLM has kicked in and I'm pretty certain the line is banded (before interleaving kicked in it was at 49997).  Any idea how long it takes for the banding to be lifted?  I know interleaving just does it as and when it fancies!

[andyfitter]

My banding stayed for over a year. Was initially caused by my dodgy dsl-ac68u, but persisted even when I switched to an HG612

I only finally lost it when I switched providers and got a DLM reset. Gained me about 6 mbit on my downstream

[Chrysalis]

for whatever reason banding seems to stick around a lot longer than interleaving on green lines.

[lcl00]

Will moving to a new ISP give me a DLM reset when it switches?  My current ISP (Zen) say that they'll have to send out an engineer to do that.

[gt94sss2]

Will moving to a new ISP give me a DLM reset when it switches?  My current ISP (Zen) say that they'll have to send out an engineer to do that.

Yes, the two ways to get DLM reset are:

a) Have an Openreach engineer visit and then request one; or
b) migrate ISP

[Chrysalis]

moving between standard, speed and stable will also do a reset but no isp's seem to be willing to do that.

[lcl00]

Is there possibly a cost associated with changing those types of profiles?

[Chrysalis]

It used to be a charge yes, and might well still be.

Its actually the reason why changing isp sometimes causes a DLM reset. As not all isp's use the same profile.

[WWWombat]

Regrading between different upstream speeds also seems to cause a DLM reset. At least it did in 2011, going from 40/2 to 40/10.

[Chrysalis]

yep so consider this, is e.g. 9 profiles (soon to be 12)

speed,standard,stable 40/2
speed,standard,stable 40/10
speed,standard,stable 80/20
(soon) speed,standard,stable 55/10

If an isp migration doesnt change the profile, there is no DLM reset, if it moves then there is a DLM reset.

So moving from speed 80/20 to speed 40/10 as wombat says will do a DLM reset.
Like wise going speed 80/20 to standard 80/20 will do a DLM reset.
However if both isps use 80/20 speed, then there is no reset as the underlying profile/product isnt been changed. (note this one may not apply if going between different GEA providers as a cease and reprovide is carried out which will possibly always do a DLM reset).