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[burakkucat]

. . . I noticed most other people's Hlog graphs that part had a line in it and mine didn't! Is that likely caused by line length or something?

The only thing I can say, with certainty, is that those frequencies (tones or sub-carriers) and upwards are not being used. To attempt to guess why is fraught with misunderstanding.

I noticed on another thread about alarm systems, which the other telephone line in the house has attached to it, I doubt it but would this potentially cause interference on the line that has the VDSL service on it?

That alarm service makes use of frequencies within the normal telephony pass-band and so should be connected via a low-pass filter, just like any telephone, etc.

[LudaLuke]

. . . I noticed most other people's Hlog graphs that part had a line in it and mine didn't! Is that likely caused by line length or something?

The only thing I can say, with certainty, is that those frequencies (tones or sub-carriers) and upwards are not being used. To attempt to guess why is fraught with misunderstanding.

I noticed on another thread about alarm systems, which the other telephone line in the house has attached to it, I doubt it but would this potentially cause interference on the line that has the VDSL service on it?

That alarm service makes use of frequencies within the normal telephony pass-band and so should be connected via a low-pass filter, just like any telephone, etc.

haha yeah, I figured that, that may potentially be the case! But not something that BT/OR will look into and answer for me I guess?

The other line has an older faceplate on it (ADSLNation IIRC) which its connected to.

as per previously I think I have to accept I've got it pretty much as fast and low latency as I can get! I doubt getting a DLM reset is likely to make any difference as it'll error and then apply interleaving? Does interleaving drop over time at all - and then readd it if it errors too much?

Thanks,

Luke

[burakkucat]

The DLM, as its name states, is a dynamic process. It monitors the operation of each circuit and if certain parameters indicate that intervention will be beneficial, action is taken.

So at the most basic level of understanding of the DLM process, the depth of interleaving can (and will) change over time. The lowest depth of interleaving is 1 (which is essentially no interleaving, equivalent to the "fast path" state of an ADSL circuit).

[LudaLuke]

Thanks BCat for all the info and help!