But in fairness they will place a GEA order using speed if you request that at the time you placed the order,Zen will also change the DLM profile upto a request ,they have made that known,
Where as the bottom line with sky is they place their GEA orders using the default "Stable" option and are telling their customers that they can't/wont change it at a later date,
As for the latency If the op is close to one of Zen's POP's Ping's may be higher to some locations,but lower to others when compared to Sky or other isp's , if he isn't able to connect at a Zen POP then i would say that they would likely see a small improvement over what they have now, which is what they would likely see on sky,
But as i did say we don't know which DLM profile BT use if it's the same default option ,then unless what ever is the underlying cause for DLM ramping up interleave was to get worse /increase there wouldn't be any further increase in latency likely Where as if the op was on the Standard or speed option , they may at the very least be able to defer further action by DLM , things may improve a little, DLM ain't perfect it likes to over react to events IMO

Don't forget that Sky also upgraded a significant part of their core network to support 100Gbit transmission in 2012 which made it the fastest in the UK at the time.

In some areas, though, Sky do use BT's network to connect exchanges to their nearest POP as was highlighted by the big outage in Wales recently which also took out Sky's broadband services from 12 exchanges as well as BTW's.

just trying to ask BT on the phone to change from stable or standard to speed profile and he's trying to upgrade me from 40/10 to 80/20, he has absolutely no idea what he's talking about, i just want to see if being on 'speed' profile actually makes a difference, if it doesnt then that would rule out moving to zen for me and ill just go with sky.

Appreciate everyones help.

Kept going around in circles there over who to go with.

Thanks again.

AFAIK BT Infinity is on Speed profile already.

is it really? I may go with sky then if this doesnt get resolved.

didnt think anyone knew, as most people have said they dont give out that information and let people know what profile they're on, regardless, the BT guy kept on relating back to actual download speeds as appose to ping and the dlm profile he thought i wanted 80/20 package.

Finally got through to someone english and they ran some tests and said there was something wrong with the profile and they will resolve it and call me back in the next 48 hours which should bump my speed up to what it should be (around 35-36Mbps he said) and this should also see my ping return to what it used to be before.

Ill try this out for a week or so, if its no better then i may change to sky.

I expect it is, as I'm on Fastpath.
If I was on a "stable" profile, I would expect to be on Interleaving.
If I was on "super-stable" I would expect to have a high level of Interleaving applied.

i dont think thats how it works, im pretty sure it just alters the thresholds needed to be reached for each level of interleaving to kick in, super stable a lower threshold etc. so on a super good line, right on top of the cabinet on super stable id still imagine it would be on fast path

I find that unlikely in the extreme as adding/removing Interleaving willy-nilly would lead to an unstable connection.

well from all the reading up ive done im pretty certain thats how its done. it has a threshold, if your line falls below that it reduces interleaving/turns it off. If your line then goes above this threshold again it will then reapply interleaving. That IS how its done

DLM (Dynamic line management) the hints in the name

Edited by deleted (Mon 21-Apr-14 13:39:51)

What I'm saying is the transition from Interleaving to Fastpath would need a resynch which would not be "stable" by any definition. On a "stable" profile, the transition would be pointless.