Significant drop in connection speed
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Plusnet Community
- :
- Forum
- :
- Help with my Plusnet services
- :
- Broadband
- :
- Re: Significant drop in connection speed
Significant drop in connection speed
29-10-2013 7:37 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
I'll be short (and sweet!) with this one - late on Sat 26th Oct my sync speed dropped from ~5500kbps to 2169kbps and has stayed there ever since. At the same time the SNR rose from ~11dB to ~25dB.
You have probably got more detailed logs than me, however my own stats are captured in the dynamic graphs here.
Is there anything that might explain this and, more importantly, anything that can be done about it?
On a more general note, looking back at the last year of stats there is an emerging trend of decreasing connection speeds. Confusingly (to me at least), the downstream attenuation is currently at the lowest ever level yet so is my sync rate!
Many thanks,
Mathew
Re: Significant drop in connection speed
29-10-2013 8:28 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
I used to get a decent download speed, now the BTW Performance Test states:
Download speedachieved during the test was - 0.19 Mbps
I'm moving to another provider. This is beyond a joke!!!!!
Re: Significant drop in connection speed
29-10-2013 8:35 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Mathew
Re: Significant drop in connection speed
30-10-2013 9:35 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
I've just taken a look at your line which shows, exactly as your graphing is reporting that your sync speeds are dropping at quite a rate. The problem is, is that there appears to be some kind of interference on the line as your SNR (which is targetted at 12db) has shot up to 25db - it's a case of finding out what could be causing this. The higher your SNR, the lower your sync rate will be so the loss in speed does make sense from that point of view.
I can reset the lien for you and move the SNR back down, however, it is unlikely to fix the problem entirely. Here's your connection graph:
<img src="http://community.plus.net/visualradius/generated/image13831256337433.png"/>
As you can see, there aren't too many drops, which is what leads me to think interference is causing your SNR to shoot up. Let me know if you'd like for me to reset the line. In the meantime, it might be worthwhile just checking for any equipment that might be causing this issue for you.
Re: Significant drop in connection speed
30-10-2013 9:46 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Have you tried a resync? That should be at 12 db with a much higher sync. If it doesn't it could mean the line has been banded.
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: Significant drop in connection speed
30-10-2013 9:50 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Many thanks for your prompt response and initial investigation. If you could reset the line that'd be appreciated as I am at a loss at to what other factor might be causing an issue and so do not know what else to do.
I can confirm there is no new equipment around and the house wiring is newish (2007) and in good condition for what it's worth. I have always viewed the TG585 router with some suspicion given its poor performance in many other respects however as I purchased this from Plusnet I consider it to be part of the service and so am not inclined to fork out for a new router from a 3rd party on the off-chance that it might be the culprit as it might well not be to blame.
Thanks again,
Mathew
Re: Significant drop in connection speed
30-10-2013 9:56 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
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: Significant drop in connection speed
30-10-2013 9:58 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Quote from: jelv Looking at your graphs thee seems to have been a brief event which generated a lot of errors. It will have resynced during the event at a much lower speed. When the event ended the sync stays the same but with the removal of the interference the SNR will shoot right up.
Thanks for your thoughts Jelv, they do make sense.
Quote Have you tried a resync? That should be at 12 db with a much higher sync. If it doesn't it could mean the line has been banded.
'Resync' as in that which would occur by rebooting? If so, no, I haven't tried that as I didn't want to upset what appears to be an already flaky connection.
The gradual degradation in service is already pushing my tolerance levels (I've not renewed the advance line rental as I'm on the cusp of looking elsewhere) and I didn't want to make it any more difficult for Plusnet to diagnose what appears to be a very intermittent issue - I'd rather they see the problem 'live' than rely on me retrospectively reporting it.
Re: Significant drop in connection speed
30-10-2013 10:25 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
I think it'd be a good idea to keep an eye on those graphs over the next couple of days to see if the SNR changes dramatically during this time. Hopefully we can build a picture of when the interference is hitting your connection. It's quite difficult for us to see as the SNR can vary at any time and the graph isn't registering any drops out of the ordinary.
Can you let us know if you notice a further dip in speeds so I can take another look for you?
I've updated your speed profile so you may notice a loss of connection for a brief time whilst this updates.
Re: Significant drop in connection speed
30-10-2013 11:42 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Quote from: MJN 'Resync' as in that which would occur by rebooting? If so, no, I haven't tried that as I didn't want to upset what appears to be an already flaky connection.
If you can see from your graphs that you've had a single short period during which it resynced at a lot lower speed and that following that there have been no significant errors logged it is safe to do ONE resync/reboot. It's when people start doing loads of them that it clouds the issue.
Have you any idea what happened at the time the problem happened? Could it have been an incoming call? It's worth ringing your own number and leaving it ringing to see if that causes similar errors.
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: Significant drop in connection speed
30-10-2013 1:08 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Jelv, the graphs suggest it was around 11pm on Saturday and there was very little going on at that time. In fact, the kids were in bed and we were just chatting in the lounge and there was no TV or heating on etc so I'd expect a reasonably 'quiet' time from a house-bourne interference perspective.
Re: Significant drop in connection speed
30-10-2013 1:14 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Isn't the attentuation a function of the line e.g. length, condition, etc and not something that should be influenced by anything you do?
Re: Significant drop in connection speed
30-10-2013 1:28 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: Significant drop in connection speed
30-10-2013 1:34 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
It seems counter-intuitive to me though that the lower sync rate occured with the lower attenuation!
Re: Significant drop in connection speed
30-10-2013 1:56 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
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) |
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page
- Plusnet Community
- :
- Forum
- :
- Help with my Plusnet services
- :
- Broadband
- :
- Re: Significant drop in connection speed