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BT FTTC - DLM


pollutionblues

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Started a new thread to discuss this as the other thread went a bit off topic :)

 

Zennon, on 21 Feb 2015 - 10:58 PM, said:

 

You are on a higher level of interleaving there for some reason , do you switch your modem or modem/router off , or does your line drop out at all?

 

Hi Zennon,

 

I very rarely switch off my modem or router as I know the DLM can be pretty severe with switch offs. My line never drops out either so I don't understand why the DLM won't lower the interleaving level.

 

I do have an unlocked Openreach modem kicking about, would I be better using that to monitor things?

 

Cheers

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Yes i would use the Modem to monitor and see how things go.

 

It might be a stuck dlm profile if things do not change you might have to have an open retch , (yes i said it) engineer out as they can only do this from the cab afaik

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Cheers Zennon!

 

I'll fire up the unlocked modem today and see how it goes. Hopefully we'll be able to avoid having to get OR out to look at it, it's not a huge issue but it'd be nice to have as low a ping as possible.

 

Years ago I had 6 different OR engineers come to my old house in the space of 4 days and they never got the issue fixed.

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Well DLM finally buggered off last night. Back to full 80/20 and fastpath so it does work eventually.

 

Now need to decide whether to go back to EIC modem to match EIC cabinet......

 

Oh and a link for BT and anyone with the HH5:

 

https://community.bt.com/t5/BT-Infinity-Speed-Connection/BT-Home-Hub-5A-dropping-connection-updates/td-p/1449945

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I've had my unlocked modem running for about 17 hours now. It's showing an interleaving depth of 3181 on the downstream and 357 on the upstream.

 

From what I've read BT uses the ES Error count for DLM (correct me if I'm wrong) so far it's only showing 9 ES Errors.

 

At least now I can see what is going on with it.

 

Cherrs for all your input guys :)

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Thats a huge DS interleaving depth! I was told mine big at 1467!!

 

On ES, when heavily interleaved they should be massively reduced. I have read that the DLM is looking to see less than 6 an hour when interleaved before it will consider line stable. On about 4 days of stats when interleaved, I think I had 3-5 ES total. Now off interleaved I have had 15 per hour (read so many different theories on fastpath ES thresholds I am not sure what is true).

 

Fingers crossed you now have the stats you can see if any patterns emerge to allow you to try get on to fastpath.

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The Huawei V3 also has a Broadcom chipset as do the EIC cabs so its not a problem with later Huawei's :)

 

I thought the Huawei were always broadcom but the EIC was different, hence the thought to match EIC modem with EIC cabinet? So if all broadcom then I would get no benefit from swapping out HG612?

 

I'm in two minds. Now line stable I'll upgrade bits of my setup and upgrade Netduma when I take network down to re-jig. If I swap in EIC when line is stable then any change to interleaving / sync would be apparent without HG612 stats and I could then swap in HG612 again if needed.

 

I personally found EIC modem was a couple of ms lower in latency when I had it in briefly on network.

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Ah that makes sense!! :)

 

Mine was on DLM for 5 days. But on a staged recovery for 3 of those (removing interleaving from US), staged increase in sync speeds and then this morning back to full speed and no interleaving.

 

But for those 5 days I didn't power down or change anything. The only re-sync that took place was when DLM wanted to which helps.

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Fingers crossed you should be on the mend in a couple of days :)

 

All my new cables etc arrived so I'll be rewiring everything tonight and getting a better cable management system in place! Ah the joys! :)

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The ECI modem does have a faster ping time by about 2ms for some reason you are right , but when i tried a ECI on a Huawei cab I had some major packet loss, it could have been a dodgy modem mind.

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I was surprised to find I had an ECI cabinet, I thought the Huawei were the preferred option now especially with vectoring in the future. But just about to take everything offline for the rejig so think I'll go with the ECI and see how it goes for stability. 

 

Any change to ip profile or fastpath and it will be back to HG612.

 

Is there anyway I can monitor sync time on ECI Zennon without being unlocked? Or would I need the Netduma to be looking for it?

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How do you find out what cabinet you've got lads,

By way my HH5 been reconfigured as bt put it and my gaming is back to where it was before so no major disruption really although I'm gonna get one them modems depending which one I need

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Mines the ECI 128.

 

Glas you can tell from the pics in Zennons link or once you get a unlocked modem you can tell from the settings too.

 

All cabling rewired and connected back up and seperate power cables to new point etc. Everything is as seperate as can be. Back to solid 16-17 ms ping to google etc so no complaints. Might swap in the hg612 tomorrow night just to see if the new cable setup has any benefit to stats before settling on the ECI longer term.

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Mines the ECI 128.

 

Glas you can tell from the pics in Zennons link or once you get a unlocked modem you can tell from the settings too.

 

All cabling rewired and connected back up and seperate power cables to new point etc. Everything is as seperate as can be. Back to solid 16-17 ms ping to google etc so no complaints. Might swap in the hg612 tomorrow night just to see if the new cable setup has any benefit to stats before settling on the ECI longer term.

Cheers again ive found where the cabinet is and will check it tomorrow 2.5km away from my house and over 10000 connections to it, So wish i never sold the TP link 9980 

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  • 3 weeks later...

Hey guys,

 

I've been tracking my modem stats for 14 days now, there's been no change to my sync speed or interleaving level as of yet. My SNR was sitting around 6db until yesterday and now it's went up to 10db.

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If your sync speed is the same at 10db as it was at 6db then this is a good thing it means you have more noise head room :)

 

And if you were to resync you would more than likely see a speed increase as it put's you to 6db with the 4db head room giving you a faster sync, but i would just leave it as it is.

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