In reply to a post by MrSaffron:

If this is an ADSL2+ service, then it may be worth looking at moving to a provider will no DLM or at least a less onerous one.

Forgive my ignorance, but I thought that the DLM was an OpenReach provision, and would not vary by ISP. If that's wrong, how do we find out the DLM policy for different ISPs?

ADSL has it's own seperate DLM and is ran by BT Wholesale.

Openreach run the DLM on VDSL2.

For ADSL2+ the DLM is in control of who runs the DSLAM the choices are

BT Wholesale based
Sky LLU based
TalkTalk LLU based
C&W LLU based

As for which will work best, it is a tough one as some people can get the other three to tweak at request, and others fail. So hard to say which one, as not lived with the line to learn its nuances.

In reply to a post by jimsym:

Forgive my ignorance, but I thought that the DLM was an OpenReach provision, and would not vary by ISP.

FTTC DLM is an Openreach provision, which is probably what you have read, and doesn't vary by ISP.

For the rest, see MrSaffron's reply, being the more accurate of the two already posted.

Additionally, on FTTC via BT Wholesale elements of the BT Wholesale DLM are superimposed. Mainly the (hardly perceptible on FTTC and IMHO normally irrelevant) IP Profile system and as a vehicle for passing ISP setup requests to the Openreach one that actually controls the connection.

Edited by RobertoS (Mon 02-Dec-13 09:33:41)

In reply to a post by MrSaffron:

For ADSL2+ the DLM is in control of who runs the DSLAM the choices are

Thanks for the clarification; This is ADSL 2+ service using BTW.

To overcome the issue at present, the ISP has over-ridden the DLM and set banding on the line to a target SNR. It is effective and so far the line is very stable and as fast as it ever is. The ISP claims this is "bespoke" and "temporary" and not really a solution.

Is this right, please?

I think they would rather the customer lived with the result of the DLM at less than half the download speed we are getting at the moment, for reasons I am unable to fathom.

Edited by deleted (Mon 02-Dec-13 11:09:50)

As I said, I'd love to see ubiquitous FTTP - but I'm a pragmatist. It's better to have what can be afforded now and recognise that it lays the foundations for future deeper fibre.

Mmmmm. The trouble is you're couching your assumptions in the environment dictated by monoliths like OpenReach, ReallyBigCorp PLC and so on. What you describe is "pragmatic" only to them, and the UK government.

I actually agree that as you say this could be a stepping stone. We should be rolling out FTTP and FTTC should be offered to everyone, cap in hand, as an apology for inaction in the years before FTTP roll out is complete. But do you really think that will happen? Every link in the chain will do what they can to avoid it. Capitalism in the West is simply not cut out for long term investment anymore.

One person's "pragmatism" is another person's short sightedness. While we're being "pragmatic" other countries are rolling out an infrastructure that will not only pay for itself but allow them to trade, learn and live better.