Syncs at 3 Db has done since retraining and never dropped,have rebooted a couple of times and syncs at 3Db from start now.

In reply to a post by boysteve:

Syncs at 3 Db has done since retraining and never dropped,have rebooted a couple of times and syncs at 3Db from start now.

That's the key point. Your lines totally and utterly stable. Would probably go months and months without a drop. Hence DLM is happy.

Good to know they now offer 3db. This brings them into direct competition with other providers.

Something I didn't mention.

DLM does sometimes change things. Eg DLM may set your line to 16Mbps
After say 1.5 months of absolutely no drop outs and 24/7 connection DLM often increases the speed.
This being said it's not a definite. So best to ring up. Its not all bad

In reply to a post by ukhardy07:

In reply to a post by Ignitionnet:

I'll poke Sky on this, selling 'up to' 20Mb and artificially throttling through design or incompetence extracts the urine.

It's not 'artificial.' DLM has capped your line specifically for one reason or another. Most people are not affected much.
DLM has an objective. This objective is NOT to get the best speed. DLM aims to give you a broadband service that will not drop out. This is why lines that have gone via sky DLM will often not have a broadband drop out for months and months on end.

Sky are artificially throttling, they aren't allowing the line to rate adapt. The only time the connection has dropped is when DLM is changing profiles, I've noted zero packet loss.

I'll give it until it's done tinkering, if it still is relatively low I'll reach out to Sky. There's zero reason why the line can't manage at very least the 18Mb it was handling with room to spare before DLM starting working its magic.

Download speed setting
Your connection has been set to a download speed of up to 16.4Mbps .

Upload speed setting
Your connection has been set to an upload speed of up to 1.3Mbps .

This is on a line with 17dB downstream attenuation that was, without DLM, managing 18Mb with 7.xdB of SNR margin but now apparently can't do more than 16.384Mb with a 6dB margin in the space of, well, the time it took DLM to kick back in.

Sky saving money with power management, lovely.

17dB should give you much faster than that, more like 21Mbps so I would repeat you have a bad line. It's very usual for a line to go faster before DLM kicks in as DLM is concerned with errors more than speed and reduces the speed to make the line stable.

I would still ask for Gaming mode.

I would in turn repeat that without DLM the line managed 18Mb with a higher margin than, immediately after DLM kicked in, it could manage at 16.384Mb.

It was like flicking a switch. 18Mb no problems, DLM comes on, 16.384Mb with a lower margin where it's remained ever since.

That or a bizarre noise kicked in on the line which has been omnipresent and it just happened to coincide perfectly with Sky's DLM beginning.

As I said, that's what happens. Before DLM kicks in, your line runs at it's max producing all sorts of errors. When DLM kicks in, it analyses your error statistics and reduces the line speed accordingly.

Lines on Sky are normally provisioned at 4 meg. Was yours provisioned at 18 meg?

In reply to a post by BatBoy:

As I said, that's what happens. Before DLM kicks in, your line runs at it's max producing all sorts of errors. When DLM kicks in, it analyses your error statistics and reduces the line speed accordingly.

Interesting those all sorts of errors corresponded with a higher SNR margin and showed zero packet loss while this lower, more stable data rate shows a lower SNR margin.

FYI: http://helpforum.sky.com/t5/Sky-Broadband-Speed/why-...

Edited by deleted (Mon 20-Aug-12 16:28:56)