ASSIA court case forces Openreach to turn off DLM
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Re: ASSIA court case forces Openreach to turn off DLM
27-11-2014 2:24 AM
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Quote from: AndyH
Quote from: chrcoluk where is this info disclosed publicly? (about the meeting and the commitment).
If its not public how do you know.
It is disclosed to the industry in monthly meetings - either the NGA working group or copper working group.
The changes are summed up by Chris Pettitt many months ago.
Not really sure how things are progressing with this since moving to a different role, but I did have a discussion, along with other ISP's regarding DLM around 8 months ago. Given the recent headline, I've no news on any, if any, impact this may have on the new solution that's being looked at.
Wish I knew more!
Re: ASSIA court case forces Openreach to turn off DLM
27-11-2014 2:29 AM
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Quote from: goldenfibre @ petecov44 - did your speed pick up better after DLM was turned off?
No sir. I am still getting 24mbps down. Tomorrow my account will drop from 80/20 to 40/20 but I suspect this has already happened even though my line rate is still 50.6 as I'm getting a really low throughput
Never mind,
Re: ASSIA court case forces Openreach to turn off DLM
27-11-2014 2:34 AM
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Re: ASSIA court case forces Openreach to turn off DLM
27-11-2014 2:57 AM
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Re: ASSIA court case forces Openreach to turn off DLM
27-11-2014 7:38 AM
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Quote from: itsme and other countries don't use DLM?
Probably the reason that LLU companies don't use it is they are not prepared to pay royalties or the development costs.
Not true. LLU companies do use a DLM, it's just not the same as BT's. You'll see some Sky customers complaining about theirs
Edit: to be clear, that applies to ADSL2+, On FTTC everyone is stuck with BT's DLM.
Quote from: goldenfibre Let hope that ASSIA next step will telling Openreach to get rid of BRAS IP Profile next!
I wish you would learn how DSL works, the IP profile is because of the packet overheads - the headers etc. You can't get rid of it.
@petecove44
Unluckily you just have a [Censored] line and DLM has given you the [Censored] profile to go with it, simples, unfortunately.
Re: ASSIA court case forces Openreach to turn off DLM
27-11-2014 8:28 AM
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In addition, any new DLM algorithm should also take account of peak-time reduced bandwidth caused by exchange congestion, and make the "IP profile" (but not the sync speed) track the average reduced available line bandwidth on an hourly basis, so that the customer's ISP traffic management (QoS) works properly - and therefore would have less packet loss and latency issues, while maintaining the highest achievable speed for the conditions at the time.
For those who don't like the idea of BT "IP profiles" at all, then you are going to hate my suggestion here -
Can the Plusnet "Current Line Speed" be set permanently to a fixed rate ?
I appreciate that this (forum) topic ONLY applies to BT FIBRE line management, but the principles of DLM are similar for all BT provisioned adaptive rate broadband products.
Re: ASSIA court case forces Openreach to turn off DLM
27-11-2014 8:40 AM
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Re: ASSIA court case forces Openreach to turn off DLM
27-11-2014 9:03 AM
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Quote from: purleigh In my opinion, BT should implement a more intelligent and more responsive DLM based on both current line conditions and hourly historical trends, so that it is less prone to reacting to occasional random bursts of noise, and recovers more quickly when the line quality improves.
I think this is what the ISPs were proposing to Openreach. For FTTC, DLM does react on the side of caution to ensure stability over speed. I do know that one of the proposed changes will be to reduce the caution counters, so a line that has been subject to DLM intervening can recover quicker than at present.
What people seem to forget though is that DLM intervenes for a reason. If there is no intervention, then end users could see a degraded service which would particularly affect those using the service for gaming/IPTV/video conferencing.
Quote from: Chris Not really sure how things are progressing with this since moving to a different role, but I did have a discussion, along with other ISP's regarding DLM around 8 months ago. Given the recent headline, I've no news on any, if any, impact this may have on the new solution that's being looked at.
Wish I knew more!
It's an inevitability there will be custom DLM profiles as well as the option for ISPs to perform resets etc. However, it will take time to develop and test the profiles. There is also the issue of who pays for them.
Hopefully Openreach will give some more info at today's T&D meeting, which PN can share (if they are allowed and someone is going!).
Quote from: Anotherone There is no escaping an IP Profile, I wish people wouldn't give the impression that it could be done away with. It's not a case of "like the idea of BT IP Profiles" it's a fact of life (whilst conceding that 20CN is a different kettle of fish, but this is a Fibre thread).
I think that the IP Profile is also part of network efficiency, so the BRAS does not send data down faster than your line can handle and cause a bottleneck in the exchange.
Re: ASSIA court case forces Openreach to turn off DLM
27-11-2014 9:09 AM
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Re: ASSIA court case forces Openreach to turn off DLM
27-11-2014 9:19 AM
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Re: ASSIA court case forces Openreach to turn off DLM
27-11-2014 9:25 AM
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Re: ASSIA court case forces Openreach to turn off DLM
27-11-2014 9:41 AM
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Re: ASSIA court case forces Openreach to turn off DLM
27-11-2014 9:51 AM
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The Plusnet Current line speed being set at or a fraction below the IP Profile allows Plusnet to determine which packets are dropped and they do take account of the type of traffic to ensure the lowest priority is dropped first.
Anyone who thinks IP Profile or Current line speed should be dropped is an idiot!
jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: ASSIA court case forces Openreach to turn off DLM
27-11-2014 10:15 AM
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Re: ASSIA court case forces Openreach to turn off DLM
27-11-2014 10:53 AM
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