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Very slow sync after line fixed

FIXED
racingclub21
Hooked
Posts: 7
Thanks: 3
Registered: ‎20-02-2022

Very slow sync after line fixed

After my line was physically fixed, I've had super low sync speeds - 288k down!

This hasnt changed for a least 2-3 weeks.

 

Can someone in Plusnet 'reset my SNR target' ? Prior to the fault, I was syncing with a stable connection around 5mb.

 

Attached shows my very high SNR Smiley

8 REPLIES 8
jab1
Aspiring Legend
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Registered: ‎24-02-2012

Re: Very slow sync after line fixed

@racingclub21 Your horrendous D/S SNR indicates clearly that the problem isn't fixed. I would submit another fault report.

John
Townman
Superuser
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Registered: ‎22-08-2007

Re: Very slow sync after line fixed

That attainable rate is rather pessimistic too!

Broadband is not going to work well if the "phone" line is not working properly.

Please perform a quiet line test - dial 17070 select option 2 using a corded phone plugged into the test socket behind the face plate of the master socket. It should be silent. A noisy phone line (or no dial tone) will have a marked adverse impact on the performance of broadband.

If the line is noisy or there is no dial tone, then a PHONE LINE fault needs to be raised with your phone provider. If this is PlusNet, you can report a fault on line using the button below.  From the Q&A list, choose the one which matches the problem, 'open' the 'section' and click the trouble-shooter link.  NB: If you receive a failure message (rather than a log-in prompt) then log-in to the user portal in a different browser tab and attempt to use the trouble-shooter again.


 

Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.

Gandalf
Plusnet Help Team
Plusnet Help Team
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Registered: ‎21-04-2017

Re: Very slow sync after line fixed

Fix

The high SNR target/margin and slow sync speed of 288k are hand in hand. 

As line tests aren't showing any issues and things are stable now, I've reset your line.

Could you retest your speed and let me know how it goes?

If this post resolved your issue please click the 'This fixed my problem' button
 Anoush Mortazavi
 Plusnet Help Team
racingclub21
Hooked
Posts: 7
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Registered: ‎20-02-2022

Re: Very slow sync after line fixed

thank you Gandalf - its looking happier at the moment.


I thought I was heavily banded, rather than any physical problem.

Gandalf
Plusnet Help Team
Plusnet Help Team
Posts: 24,597
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Registered: ‎21-04-2017

Re: Very slow sync after line fixed

Awesome, that's good to see.

Yup, a sync speed at 288k or 576k is more often than not what's known as "chronic banding" and can only be removed manually as DLM won't automatically lift this like it will do for the higher bandings. This is a good guide about bandings > https://community.plus.net/t5/Library/Broadband-Faults-Guide-Banding-Guide/ba-p/1322790

Let me know if you need any further help Smiley

If this post resolved your issue please click the 'This fixed my problem' button
 Anoush Mortazavi
 Plusnet Help Team
Townman
Superuser
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Registered: ‎22-08-2007

Re: Very slow sync after line fixed

Those SNRM figures are still a little elevated. Is the router messing with this metrics … or are you suffering from line noise?

Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.

racingclub21
Hooked
Posts: 7
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Registered: ‎20-02-2022

Re: Very slow sync after line fixed

I dont have any SNR tweaks applied, so the router shouldn't be interfering.

The phone seems pretty normal to me, although I've forgotten what a POTS line sounds like these days.

 

I assumed the SNR would be 'adapted' back to normal at some point, as its just been reset.

 

I'm not hung up on outright speed as I would have done previously, as the ADSL line is now relegated to a hot failover for any blips in my Starlink. Low latency & uptime is good Smiley

 

Townman
Superuser
Superuser
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Registered: ‎22-08-2007

Re: Very slow sync after line fixed

Reset SNRM should be 6dB. Variations suggest the presence of electrical interference to some extent or other. During the hours of darkness European AM radio can give rise to 1.5dB (or so) variation.

If the last sync was during the hours of darkness the SNRM might rise above 6dB during the day. If during the day, the SNRM might fall below 6dB during the evening.

If resync was during the day and the SNRM is seen to be higher than 6dB during the day, that suggests that there was noise present at the time of the resync. The big question then is, did that noise cause the sync to drop?

Have that happen often enough and the DLM will jack up the target SNRM again. Keep a watching eye on the stats.

Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.