FTTC VDSL DLM

When installed my ping to bbc.co.uk (from a wired connection) was around 24ms.

Since day 2 it jumped to 38ms and stayed there.

My guess is dlm has enabled interleaving. Does anyone know if this gets permanently set in day 1 or is it dynamically switched off/on depending on line conditions over a ~3 day period?

Thanks
Nigel.

I believe it is dynamic, it may also depend on which of the three stability options you're on.

I've had FTTC/VDSL2 for 5 months now and the level on interleaving has changed numerous times over that period.

Post deleted by billford

In reply to a post by yarwell:

I believe it is dynamic, it may also depend on which of the three stability options you're on.

can you explain more about the stability options?
Are these determined by DLM or assigned by ISP ((I'm with BT - Infinity)

the stability options are selected by your ISP when ordering the product and form inputs to the DLM. Standard, stable and superstable presumably implies increasing SNR margin and impulse protection / interleaving levels.

Are switches between the "profiles" only done manually/through an order (presumably this might occur if a line ws especially troublesome)?

This profile then presumably affects the dlm algorithm/liimits to potentially make it more conservative.

Would I be correct in assuming most ISPs would provision on standard? BT Infinity?

This would mean my profile should continuously adapt via DLM and not get stuck.

Just worried something happened in first few days that will manually "fix" my profile for ever more. In particular chasing a latency increase.

I would guess most use standard, the clue being in the name - but I don't know that.

It's an option at order time, and would be a change order to switch it.

The docs say it continually adjusts but depending on its parameters may not actually change anything if what it measures stays within parameters.