I believe that my SNR margin is causing slow downstream sync speed
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I believe that my SNR margin is causing slow downstream sync speed
11-10-2012 1:28 PM
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I've recently had a terrible noise problem on the BT phone line, which they (Openreach) have now finally fixed. It was causing lots of disconnects so the exchange has ramped the SNR margin up (to around 30) and throttled the downstream sync speed to 250kb/s.
Now the line is fixed and the broadband has been connected since the engineer left yesterday afternoon (around 21 hours ago). I've talked to Plus.net Customer Service who said that I have to sit it out for 72 hours to see if the SNR/downstream rate automatically adjusts before they will action a SNR reset from their side.
I was wondering though: in people's experience, does it reset at the exchange ONLY when it hits 72 hours or could it happen beforehand?
Thanks for any insight in advance,
Paul.
PS: My set up is: a draytek vigor 120 modem connected to an Airport Extreme (and I use a Mac computer) so the only way I seem to be able to get at the modem stats is to disconnect the modem from the Airport and connect the ethernet cable directly to my computer so I can access the web-based UI for the modem. At the moment I am loath to do that for fear of it resetting the 72 hour counter as the PPPoA session disconnects. Unless it is only rebooting the modem that will cause the counter to reset? i.e. disconnecting the PPPoA session and/or router is fine?? I have no idea.
As a result: I have never been so nervous in my life that my modem will reset itself/disconnect. I think I rely on the internet too much!
Re: I believe that my SNR margin is causing slow downstream sync speed
11-10-2012 2:05 PM
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Re: I believe that my SNR margin is causing slow downstream sync speed
11-10-2012 2:27 PM
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Quote from: Paul I've talked to Plus.net Customer Service who said that I have to sit it out for 72 hours to see if the SNR/downstream rate automatically adjusts
It wouldn't! Someone needs educating on the difference between the time taken for an IP Profile change and adjustment of the target SNR. The former can take around 72 hours, the latter can take weeks to return to normal.
jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: I believe that my SNR margin is causing slow downstream sync speed
11-10-2012 2:43 PM
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@jelv :
Quote from: jelv can take weeks to return to normal.
Yikes! I had no idea. I hope it can be sorted by PN then as it has already been about 3.5 weeks without a usable internet connection (but this was nothing to do with PN, it was solely the phone line fault which openreach took their time fixing).
Re: I believe that my SNR margin is causing slow downstream sync speed
11-10-2012 2:52 PM
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I'm the chap from Chris' team that's just requested the SNR reset for you. Fingers crossed you'll see some improvement after a couple of hours. However, please do bear in mind that these requests can take up to 24 hours to complete.
Adam
Re: I believe that my SNR margin is causing slow downstream sync speed
11-10-2012 2:59 PM
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Thanks,
Paul.
Re: I believe that my SNR margin is causing slow downstream sync speed
11-10-2012 3:01 PM
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Paul, It should automatically resync by itself.
jelv (a.k.a Spoon Whittler) Why I have left Plusnet (warning: long post!) Broadband: Andrews & Arnold Home::1 (FTTC 80/20) Line rental: Pulse 8 Home Line Rental (£14.40/month) Mobile: iD mobile (£4/month) |
Re: I believe that my SNR margin is causing slow downstream sync speed
11-10-2012 3:35 PM
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So:
- do I now just have to wait for the plusnet line systems to update with that new IP profile before I see the speed increase? [Edit: this is where I am supposed to be looking for it to update isn't it?: https://portal.plus.net/my.html?action=data_transfer_speed]
- Is it normal to see a large difference between the theoretical maximum and the IP profile value? In this case 11mb.
Thanks again for any insights.
Cheers,
Paul.
Re: I believe that my SNR margin is causing slow downstream sync speed
11-10-2012 5:02 PM
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Just upped your profile on our side to 10000, it's not showing on the site we get profile updates from so that would have delayed things. Should improve your speed for you (I hope), please let us know.
Re: I believe that my SNR margin is causing slow downstream sync speed
11-10-2012 5:26 PM
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I think I once had it go higher than 6mb a couple of years ago, so it is now the best it has ever been!
Thanks so much to you and your colleagues on the Digital Care team (and you @jelv!!).
I will wait to see if BT wholesale improve my IP profile further up over time, now that the line is fixed properly.
cheers,
Paul.
Re: I believe that my SNR margin is causing slow downstream sync speed
12-10-2012 11:15 AM
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