Are these uncorrected errors excessive?
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Re: Are these uncorrected errors excessive?
14-11-2012 3:30 PM
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My Broadband Ping
At 0530 this morning SNR was stil low about 2 and
response was very slow/inactive when opening a web page.
Now router stats show RX Blocks Corrected Blocks Uncorrected Blocks
2121680 0 178936
after link uptime of 13h 52m SNR 3.0
ADSL Status Mode State Up Speed Down Speed SNR Margin Loop Att.
ADSL2+ SHOWTIME 1063800 13862300 3.0 25.0
Re: Are these uncorrected errors excessive?
14-11-2012 3:52 PM
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Quote from: jelv What was the noise margin when it restarted? My guess is that it will be 3 and that you have a lower sync speed and that tomorrow during the day you'll see the noise margin much higher. That might mean that you see less errors and a more stable line (until the next daytime sync when you'll be back to square one).
It was 3 initially, but by 0530 it was 1.5 - 2 and not looking very "happy". i.e. web pages took forever to load. I wish it would go above 3 to give some headroom. In the good old ADSL1 days it was rock steady with about 6.
Re: Are these uncorrected errors excessive?
14-11-2012 3:54 PM
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Quote from: Anotherone You will find your error rate is much better now, having had a resync whilst your SNRM was so low, as it will have gone back to the Target value (3dB presumably) albeit with a slightly lower sync speed. (Invariably altering most modem/router settings needs a reboot/resync).
Error rate still seems high? Not sure what you think (new screen shot loaded in previous post)?
Re: Are these uncorrected errors excessive?
14-11-2012 4:11 PM
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If you continue to have issues you could request Plusnet to set your minimum Target SNRM to 6dB, with the consequential slower sync speed, however, my suspicion is that you have some interference/noise issues which might be best investigated first as your current sync speed is a bit low for the attenuation.
Re: Are these uncorrected errors excessive?
14-11-2012 4:19 PM
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The noise bit could be fun as in our place it has always been an old style PO connection box with a "fly lead" to a white box (laways been that wy, but with ring wire removed a couple of yrs ago)..On the two occasions BT have attended here over the years, they've lways given the line a clean bill of health....but not test socket etc here.
jim:quote
Re: Are these uncorrected errors excessive?
14-11-2012 4:21 PM
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As for the error rate... It is still hard to tell when looking at a single snapshot. What we need to see are snapshots at the beginning and end of both a "normal" period and an "unresponsive" period - we need to see how the error rates differ between the two.
Otherwise, do as @Anotherone suggests. By re-syncing at a time when the SNRM is at it's lowest, you are making sure that the modem gives itself as much headroom as possible for future unresponsive times.
Using FTTC since 2011. Currently on 80/20 Unlimited Fibre Extra.
Re: Are these uncorrected errors excessive?
14-11-2012 4:30 PM
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Quote from: grahamn i.e You get a "connecting" on the IE tab for ages taking a very long time without getting a "not found" message
That "not found" issue could turn out to be a DNS issue - perhaps with the router, or perhaps upstream.
There are some things you could try, to see if that is part of the problem.
- Configure the router with Plusnet's DNS servers - even if it gets the right DNS server addresses when the router authenticates at the start of a connection.
- Configure the router with OpenDNS servers
- Configure the router with Google's DNS servers
- Configure the PC with Plusnet's DNS servers - and bypass the automatic configuration from DHCP (which would try to use the router as DNS server)
- Configure the PC with OpenDNS servers
- Configure the PC with Google's DNS servers
Plusnet:
212.159.6.10
212.159.6.9
OpenDNS:
208.67.222.222
208.67.220.220
Google:
8.8.8.8
8.8.4.4
It could be a browser issue too - so I might suggest trying Firefox or Chrome, just to see.
Certainly you can see the different phases of looking-up addresses, to connecting.
Using FTTC since 2011. Currently on 80/20 Unlimited Fibre Extra.
Re: Are these uncorrected errors excessive?
14-11-2012 4:37 PM
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I will certainly restart the router at its low point tonight.
Unfortunately I don't know what happened after the early morning problem as I was straight out the door soon after until this afternoon.
Am I right in assuming that the noise is more than likely, interfering with the traffic with SNR margin drops to 1.5 - 2?
Is there anything that would result in these uncorrected errors in the total absence of any corrected ones - seems odd to me????
Thanks again guys...will keep you updated
PS. to WWWombat's latest post (after I started this one)..the "not found" message never actually comes.... also re alternate DNS, Draytek seems to ignore the DNS IPs you can specify once the router is connected. I guess if I telnet in there may be an override in there somewhere...
The browser seems the same whatever, but will try another machine on my network
Re: Are these uncorrected errors excessive?
14-11-2012 4:45 PM
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Are the connections in the P.O connection box clean and tight - but don't do anything with them if they aren't - is there any audible noise using the phone?
Re: Are these uncorrected errors excessive?
14-11-2012 4:55 PM
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The cable sounds like CW1411, but I will have a look now if I can find a torch!
No noise that I'm aware of (DECT phones in use connected to the socket in the hall (with a filter of course) ...will try the quiet line test 17070 or something like that?
Re: Are these uncorrected errors excessive?
14-11-2012 5:02 PM
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The fly lead could well be the CW 1308 but I may have to try and take a pic to let you see (you may be horrified!).....
Phew, finally just got back online - each PC taking about 1 min to load google search, then another minute to pload plusnet pages and another for the community site page and so on........
Quiet line test seems to have a feint rapid pulsing noise, not sure how else to describe it? But it is feint my wife says and her hearing is better than mine (normally!)
Re: Are these uncorrected errors excessive?
14-11-2012 5:24 PM
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Re: Are these uncorrected errors excessive?
14-11-2012 5:30 PM
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The thing is one of the extension wiring plug -ins.....the underground cable (makes sense as they are underground - no poles here)
feeds into the socket from the right-hand side. Immediately plugged into that plugin is a filter, then our DECT base station goes into that (but was using a regular wired phone for the quiet test).
The router has been used both directly into that "master" socket and on the end of the ext wiring - values are the same at both the master socket and the ext wiring end (believe it or not!).
Re: Are these uncorrected errors excessive?
14-11-2012 5:57 PM
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Speed tests are a waste of time because profiles have to 'catch-up'.
That "thing" could be the cause of some noise, because even if it is twisted pair cable, which some are, but very few, it will undoubtedly have a bell wire in it. The best way to assess it is to look at the back of the socket on the other end. What colour wires on what terminal numbers?
Was the DECT still on, or plugged in when you did the quiet line test, that was probably what was causing the pulsing noise.
Try this first - look at you rnoise margin and then switch off the DECT base station and all handsets and see what happens to the noise margin.
Re: Are these uncorrected errors excessive?
14-11-2012 6:07 PM
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As suggested have now switched base st. off and all handsets.
SNR before this was 3 and remains at 3, but you were spot on about the pulsing noise - now gone
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