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Author Topic: Openreach Extend Low Level Error Correction to New 80Mbps FTTC Lines  (Read 1512 times)

Bowdon

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Openreach Extend Low Level Error Correction to New 80Mbps FTTC Lines
« on: August 24, 2018, 10:49:59 AM »
https://www.ispreview.co.uk/index.php/2018/08/openreach-extend-low-level-error-correction-to-new-80mbps-fttc-lines.html

Quote
Consumers adopting one of Openreach’s 80Mbps Fibre-to-the-Cabinet (FTTC / VDSL2) based UK broadband ISP lines (usually advertised with average speeds of c.60-65Mbps) are likely to create fewer fault reports during the initial provision phase after the new “low level error correction” feature began being applied to them.

The roll-out of this feature actually began back in February 2018, although at the time it was only deployed to the operator’s slower 40Mbps and 55Mbps product tiers (this wasn’t stated in their public briefing). This week it also began being extended to their top 80Mbps product tier on the same VDSL2 based broadband service.

Normally a Dynamic Line Management (DLM) system is used to control the speed and stability of these lines (your speed may go up or down depending upon how stable DLM thinks the line is), but after first provision (i.e. new installation) it usually takes about 48 hours before this is introduced so that everything can be correctly calibrated. As such new lines go through a period with no error correction being applied and their speed capped.

As Openreach explains, “This can lead to customer(s) raising faults before DLM starts working due to excessive data errors which impact their broadband service.” The solution that they’ve developed is to temporarily apply a low level of error correction during the first 48 hours, before DLM kicks in properly, which helps to mitigate the aforementioned problems.
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johnson

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Re: Openreach Extend Low Level Error Correction to New 80Mbps FTTC Lines
« Reply #1 on: August 24, 2018, 10:58:34 AM »
So default profile will have more interleaving? Or G.INP from the start on Huawei cabs?
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Ixel

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Re: Openreach Extend Low Level Error Correction to New 80Mbps FTTC Lines
« Reply #2 on: August 24, 2018, 05:17:02 PM »
Quote from: johnson on August 24, 2018, 10:58:34 AM
So default profile will have more interleaving? Or G.INP from the start on Huawei cabs?

Default profile on both ECI and Huawei will be INP 3 and delay 8ms on the downstream for 48 hours, is what I make from this.
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j0hn

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Re: Openreach Extend Low Level Error Correction to New 80Mbps FTTC Lines
« Reply #3 on: August 24, 2018, 05:35:06 PM »
This has been discussed a little on here recently.

I disagree on the timing as it's been on the 80Mb product longer than this week
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burakkucat

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Re: Openreach Extend Low Level Error Correction to New 80Mbps FTTC Lines
« Reply #4 on: August 24, 2018, 06:26:04 PM »
Quote from: j0hn on August 24, 2018, 05:35:06 PM
. . . it's been on the 80Mb product longer than this week

Yes, that is what I also thought.
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adslmax

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Re: Openreach Extend Low Level Error Correction to New 80Mbps FTTC Lines
« Reply #5 on: August 25, 2018, 01:52:55 AM »
This is what has happen to my line when openreach engineer reset default DLM on my line with interleave depth enabled on INP 3.00 without G.INP for 48 hours
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