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Author Topic: Openreach - Three activations missed due to Routing Issue  (Read 4884 times)

Freedom2

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Re: Openreach - Three activations missed due to Routing Issue
« Reply #105 on: September 26, 2020, 09:54:10 AM »

Line just went down and immediately resync'd at 77073/19999 and pings are back to what they were before DLM was turned on. Wonder if someone has done something?

It's not the 78224 downstream sync that it was originally, but it's not much different.

Will have to keep an eye on the sync over the next few days.
« Last Edit: September 26, 2020, 09:57:36 AM by Freedom2 »
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burakkucat

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Re: Openreach - Three activations missed due to Routing Issue
« Reply #106 on: September 26, 2020, 06:07:35 PM »

Line just went down and immediately resync'd at 77073/19999 and pings are back to what they were before DLM was turned on.

I would image that G.Inp is, by now, enabled. So perhaps the above was the DLM process decrementing the target SNRM from 6 to 5 dB.
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Freedom2

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Re: Openreach - Three activations missed due to Routing Issue
« Reply #107 on: October 16, 2020, 07:17:51 PM »

The day after my last post it went back up to the previous 78224/19999 but then gradually over the last 3 weeks it started to dip every week to the point where earlier this week it was something around 72000/19999.

Tuesday night it disconnected and reconnected immediately at 79390/19999 so that must have been G.INP going on by the sounds of things, since that sync speed has stuck ever since and noise margin is now 5.4dB where it never moved from 6dB previously.

All of the messing about was worth it in the end, don't know anyone with FTTC with a higher sync speed!
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Alex Atkin UK

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Re: Openreach - Three activations missed due to Routing Issue
« Reply #108 on: October 17, 2020, 12:04:11 AM »

The day after my last post it went back up to the previous 78224/19999 but then gradually over the last 3 weeks it started to dip every week to the point where earlier this week it was something around 72000/19999.

Tuesday night it disconnected and reconnected immediately at 79390/19999 so that must have been G.INP going on by the sounds of things, since that sync speed has stuck ever since and noise margin is now 5.4dB where it never moved from 6dB previously.

All of the messing about was worth it in the end, don't know anyone with FTTC with a higher sync speed!

Will be interesting to see if DLM tries 4dB to get you up to 79999/19999.
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Freedom2

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Re: Openreach - Three activations missed due to Routing Issue
« Reply #109 on: October 18, 2020, 08:52:48 AM »

Will be interesting to see if DLM tries 4dB to get you up to 79999/19999.
So, further re-sync overnight, and that's exactly what happened.

New sync speed
79999/19999

Noise Margin
 4.9dB

Could probably go a fair bit higher sync speed if the Openreach product allowed.

Neighbours don't have that kind of sync so probably related to whatever work they did when the re-routed my line as I suspect they wanted to make it A* quality after the issues.

I'm not seeing any real difference between syncing at 73000 and 79999 though in speed test results or real world performance. Can something else, such as an IP Profile, be not taking full advantage of the 79999?
« Last Edit: October 18, 2020, 08:58:52 AM by Freedom2 »
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Alex Atkin UK

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Re: Openreach - Three activations missed due to Routing Issue
« Reply #110 on: October 18, 2020, 03:17:20 PM »

It could very well be your IP profile didn't change, although it can also be practically impossible to actually measure differences in the real world when its only a Megabit or two as this can fall into the margin of error due to the fact any given speedtest is not necessarily maxing your line anyway.
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j0hn

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Re: Openreach - Three activations missed due to Routing Issue
« Reply #111 on: October 18, 2020, 09:33:11 PM »

You're almost always put on Retx High when the SNRM target is lowered.
This has a lower throughput that Retx Low.

You can trick the DLM in to moving the line to Retx Low to get the throughput back up. This is done by capping the line.
There's a recent thread on this somewhere on the forum.
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Freedom2

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Re: Openreach - Three activations missed due to Routing Issue
« Reply #112 on: October 18, 2020, 10:20:52 PM »

You're almost always put on Retx High when the SNRM target is lowered.
This has a lower throughput that Retx Low.

You can trick the DLM in to moving the line to Retx Low to get the throughput back up. This is done by capping the line.
There's a recent thread on this somewhere on the forum.

This is the best I can get on 79999/19999
https://www.speedtest.net/result/10271399758.png

On 78224/19999 I got this
https://www.speedtest.net/result/10095513220.png

So there's very little difference, I've gone back slightly but what is noticeable is that my pings on speedtest.net now always seem to be around the 7/8 ms mark rather than the 9/10ms mark they used to be.

The other thing that's noticeable is that on other speedtests, such as Thinkbroadband, DSLReports, Fast.com etc, I'm seeing speeds of around 65-68Mbps whereas previously they were 71-73Mbps on the lower sync.

It's nothing too drastic of a drop off anyway so I'm not really fussed at the moment, but it would be nice to squeeze a little bit more out of it if possible but I'm not going to lose sleep over it.

What causes Retx to be on high and does it go to low if the line is stable enough? Just seems silly to increase sync speed if the actual throughput is going to be less.
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