Sudden Drop In Speed
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Re: Sudden Drop In Speed
17-02-2017 7:41 PM - edited 17-02-2017 7:41 PM
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If this post resolved your issue, please click the 'This fixed my problem' button
Re: Sudden Drop In Speed
17-02-2017 7:46 PM
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I've a hunch this is related to something else.
Bob Pullen
Plusnet Product Team
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Re: Sudden Drop In Speed
17-02-2017 7:47 PM
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@bobpullen im kind of somerset area but more north somerset previously known as Avon
Re: Sudden Drop In Speed
17-02-2017 7:53 PM
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I am not in any trial area. Cos I am from Cuckoo Oak telephone exchange (there isn't any trial for 3dB SNR at present)
Re: Sudden Drop In Speed
17-02-2017 7:56 PM - edited 17-02-2017 8:05 PM
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Having said that, a lower target SNR would increase headline sync speed, not the adverse.
As mentioned, I think something else is at play. Will do some digging next week...
Bob Pullen
Plusnet Product Team
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Re: Sudden Drop In Speed
17-02-2017 7:58 PM
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My line had been quite stable on the 3db profile for almost 2 weeks then all of a sudden the speed just dropped around midday so don't think it was DLM causing it.
Re: Sudden Drop In Speed
17-02-2017 8:07 PM
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Bob Pullen
Plusnet Product Team
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Re: Sudden Drop In Speed
18-02-2017 1:12 PM
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Looks like DLM has increased the speed slightly but it looks like im back on the 6db profile .
Re: Sudden Drop In Speed
20-02-2017 3:51 PM
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@bobpullen @Anoush Is there anymore info if my line was being trialed on the 3db profile though it appears to have gone back to the 6db profile again now .
Re: Sudden Drop In Speed
21-02-2017 5:13 PM - edited 21-02-2017 5:29 PM
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The evidence strongly suggests you were on the xDB trial, although you're not in my original list. I believe Openreach have loaded further circuits onto the trial since then though.
Your exchange and cabinet are both in the targeted area.
I think I witnessed first hand what happened to your line on one of my FTTC circuits at home (which incidentally was also included on the 3db trial):
Same time on Thursday my line dropped, latency doubled and I lost ~7mbps of sync:
It stayed like this for a couple of days before recovering after an outage Saturday morning. Me forcing a resync during the affected period had no influence on things:
The triggering factor looks to be a change in the underlying DLM policy for both of our lines that happened on Thursday.
In theory, it shouldn't have had such a negative impact, so I'm wondering if there's some sort of incompatibility issue with the 3db trial policy. I'll try and find out and make sure the necessary people are aware if it's not something that's already been flagged to them.
In the meantime, I've a feeling this is going to have removed you from the trial
I'll seek a definitive answer. Let me know if things recover on their own accord.
Edit: Looks like you're still on a 3db profile according to a GEA test. Do you know what you were in sync at prior to last Thursday? ~79mbps by any chance?
Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵
Re: Sudden Drop In Speed
21-02-2017 8:51 PM
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@bobpullen This was my sync speed prior to thursday .
Re: Sudden Drop In Speed
22-02-2017 8:48 AM
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Will let you know when I get some answers...
Bob Pullen
Plusnet Product Team
If I've been helpful then please give thanks ⤵
Re: Sudden Drop In Speed
23-02-2017 1:02 PM
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Sorry to butt in on jamesanstee's thread but I had a similar increase in latency /reduced synch for a couple of days followed by a recovery, last week.
I see my Somerset exchange is in the 3dB trial:
http://forum.kitz.co.uk/index.php/topic,19380.msg342998.html#msg342998
Bob, could you please advise if my circuit was on the trial?
Thanks
Richard
Re: Sudden Drop In Speed
25-02-2017 3:01 PM
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@bobpullen Just had a re-sync , sync speed is slowly creeping back up to 70 but home hub is still showing it as a 6db profile though from your check the other day it was still showing as the trial 3db
Re: Sudden Drop In Speed
28-02-2017 3:23 PM
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@RichardB, what cabinet/exchange are you connected to?
Bob Pullen
Plusnet Product Team
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- Re: Sudden Drop In Speed