What does the "Troubleshooting" page take you to? I think on the Home Hubs going to help, troubleshooting would give stats.

In reply to a post by ian72:

What does the "Troubleshooting" page take you to? I think on the Home Hubs going to help, troubleshooting would give stats.

I take it back! I was about to say that link only goes to an info page telling you to restart your router etc. But there is a 'Helpdesk' link on that page which, luckily, I clicked. I'm very sorry for doubting you!

This is what it says:
----------------------------------------------------------------------------
1. Product name: Plusnet Hub
2. Serial number: +081441+NQ81827741
3. Firmware version: Software version 4.7.5.1.83.8.263 Last updated 22/03/19
4. Board version: Plusnet Hub One
5. DSL uptime: 1 days, 13:50:22
6. Data rate: 8726 / 27363
7. Maximum data rate: 8719 / 51664
8. Noise margin: 5.9 / 19.0
9. Line attenuation: 33.8 / 22.2
10. Signal attenuation: 34.4 / 19.8
11. Data sent/received: 8.7 GB / 193.8 GB
12. Broadband username: *******@plusdsl.net
13. 2.4 GHz Wireless network/SSID: DataPerceptions
14. 2.4 GHz Wireless connections: Enabled (802.11 b/g/n (up to 144 Mb/s))
15. 2.4 GHz Wireless security: WPA2
16. 2.4 GHz Wireless channel: Automatic (Smart Wireless)
17. 5 GHz Wireless network/SSID: DataPerceptions-AP-5g
18. 5 GHz Wireless connections: Enabled (802.11 a/n/ac (up to 1300 Mb/s))
19. 5 GHz Wireless security: WPA2
20. 5 GHz Wireless channel: Automatic (Smart Wireless)
21. Firewall: Default
22. MAC Address: 08:d5:9d:95:09:20
23. Modulation: G.993.2 Annex B
24. Software variant: AA
25. Boot loader: 1.0.0
-----------------------------------------------------------------------------------------

Hope the above info provides some insight! And many thanks!

With kind regards,

Pete

Cool, I thought it was there somewhere...

This line:

10. Signal attenuation: 34.4 / 19.8

That is the SNR and the downstream SNR at 19.8 is very high and is where your speed is disappearing. The fact engineers have reset this in the past (which is when your speeds have jumped up) suggests there is an issue with your line and DLM keeps increasing the margin to stabilise things.

EDIT : As pointed out by MHC the line I meant to quote was:

8. Noise margin: 5.9 / 19.0

Edited by ian72 (Mon 20-Jan-20 17:08:38)

Two key figures in that:

Attenuation 22.8 or 19.8 and Max Data 51664

For 600m line those are about what I would expect however, something is pulling the line down on reboot/resync as it is working with a 19.0 dB margin and that is what teh sync is down around 25000

How you overcome that, I am not sure.

Try powering everything down and leaving for a hour. Disconnect every cable.
Then power up teh modem/hub without any connections at all and leave alone for 10 minutes. Then make the connection from modem to socket. Again, do nothiong else for 10 minutes, then reconnect a single PC and access stats.

In reply to a post by ian72:

Cool, I thought it was there somewhere...

This line:

10. Signal attenuation: 34.4 / 19.8

That is the SNR and the downstream SNR at 19.8 is very high and is where your speed is disappearing. The fact engineers have reset this in the past (which is when your speeds have jumped up) suggests there is an issue with your line and DLM keeps increasing the margin to stabilise things.

Think you have misquoted - 19.8 is the attenuation, there is also a 19.0 margin on a separate line.

Hi MHC,

Thanks for this. I will try what you suggested tomorrow when I'm home alone!

I'll post the results.

Many thanks, in the meantime.

It just allows everything to quiten down then minimal "noise" when teh reconnection is made. It may also be worth switching off the fridge, freezer and central heating a few minutes before you reconnect.

Oops, selected wrong line by accident.

OP here. The 4th Openreach engineer visited today. He found a small issue with the phone cable from the pole to the house and replaced it. And did a line reset. He told me to disregard any speed variation for 10 days so the DLM could settle my line profile.

He also said that all measurements taken were excellent and there's no reason why I shouldn't be getting much nearer to the 40Mbps that I pay for.

For what it's worth, this is the before and (current) after, taken from the Plusnet router stats page:

- Data rate from 8726 / 27363 to 8904 / 39950
- Maximum data rate from 8726 / 52755 to 8904 / 55301
- Noise margin from 6.0 / 19.5 to 6.2 / 13.3
- Line attenuation from 33.8 / 22.2 to 33.6 / 22.1
- Signal attenuation from 34.2 / 19.8 to 33.9 / 20.2

Assume the changes are good, not bad as the speed is currently as good as I can reasonably expect, albeit subject to revision through the DLM process?

I'll come back in 10 days, in case anyone is interested in how this ended!

Thanks!

Pete

2 days, 10 days or 100 days the DLM is always active, how fast it gets down to a relatively unchanging speed depends on not just the line but the random noise environment it is subject to