FTTC - Massive drop in sync speed
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- Re: FTTC - Massive drop in sync speed
FTTC - Massive drop in sync speed
04-03-2013 2:00 PM
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I know about the recent problems with peak time performance and latency and had experienced some of this myself last week, but this seems to be unrelated.
Ever since I got FTTC I have synced at between the mid 60s and low 70s Mbps, although the periods in the 70s have been fairly short-lived. This is fine, I am 450m from the cabinet and beating my estimated speed. I just got back from a weekend away (router and modem left switched on) and, after running a speed test to check the peak-time performance issue and getting a lowish speed, I found that my modem had re-synced at 40492/11783. This has never happened before and worried me somewhat. The SNR was 15.9 and max attainable 74036. My IP profile was 39.19, which is correct for the sync speed and my Plusnet line speed 64.2Mbps as it hadn't caught up yet.
So, I thought, reboot the modem and see what happens. It resynced at 60613/19556, which is much better and I thought I could live with that for now, in the hope that it would increase in time. The SNR was 6.3 and max attainable 78768. Speed tests in the mid to high 50s confirmed that all was reasonably well.
BUT ... I get up this morning and find I am synced at 39999/9997, which is highly suspicious. SNR is 11.8 and max attainable 78192/28880. Now this looks to me as though either I have been erroneously regraded to the 40/10 product or some sort of banding has been applied. Does anyone have an opinion on this? I can obviously go through the official support channels but I thought I'd put this out here first as I'm a bit pushed for time. I may reboot the modem again, if I do I'll edit the post.
Incidentally, the Plusnet line speed is still 64.2 and the IP profile is 58.23, which almost matches yesterday's evening's recorded sync speed of 60613 (it's actually slightly lower than it should be).
(Edit: No change after modem reboot, as expected, though obviously my IP profile will now have changed as I've had to start a new session.)
Re: FTTC - Massive drop in sync speed
04-03-2013 2:23 PM
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I've had a look over your connection and your line profile has been set to 40/10, this may have been due to recent events on your line. You're still on the 80/20 product and haven't been regraded.
To resolve this can you run through the fault wizard at http://faults.plus.net and we can then look at getting your line reset.
Chris
Re: FTTC - Massive drop in sync speed
04-03-2013 2:53 PM
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Re: FTTC - Massive drop in sync speed
05-03-2013 2:28 PM
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Quote I have tested your connection today and found a fault on your line. I have now raised your fault to our suppliers to investigate your fault further we should now have a further update in the next 24 hours.
Re: FTTC - Massive drop in sync speed
05-03-2013 5:08 PM
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Re: FTTC - Massive drop in sync speed
05-03-2013 5:11 PM
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Re: FTTC - Massive drop in sync speed
06-03-2013 1:59 PM
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Re: FTTC - Massive drop in sync speed
07-03-2013 2:21 PM
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Re: FTTC - Massive drop in sync speed
07-03-2013 6:28 PM
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Re: FTTC - Massive drop in sync speed
08-03-2013 10:30 AM
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Anyway, following the reset the sync speed was 71212/20000 (nice!) and the IP profile 68.93. The engineer did have to disconnect the modem again to plug his tester into the test socket to complete the mandatory line checks, and when plugged back in, sync had dropped to 68014/20000 - 3 meg lost, just like that! My Plusnet line speed is still 36.8 Mbps so I cannot make use of the speed yet. I realise this should sort itself out but if you could give it a nudge, that would be appreciated.
The engineer was very helpful and he thought it was pretty ridiculous that they had to go through this palaver to get a profile rest. I don't understand why the ISP cannot request it and only if there is then still a problem, send an engineer.
Thanks for all your help with this, Chris.
Re: FTTC - Massive drop in sync speed
08-03-2013 1:40 PM
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The way fibre works it isn't possible for us to reset SNR or ask for the profile on BT's side to be updated which explains why we have to go via their faults process if there's an issue with that.
Adam
Re: FTTC - Massive drop in sync speed
08-03-2013 2:09 PM
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Re: FTTC - Massive drop in sync speed
08-03-2013 2:13 PM
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