Unstable DSL connection
- 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: Unstable DSL connection
Unstable DSL connection
27-08-2014 11:54 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
This issue has started Monday evening. I am getting constantly disconnected.
The reason of disconnect is always: "Loss of Signal Quality"
The router is a Asus DSL-N66U and it has been stable for the last months. Now from Monday I cannot even touch the internet connection without triggering a DSL renegotiation.
SNR data is constant. The real problem resides in the number of CRC errors:
adslphxcmd info --show
adslphxcmd: ADSL driver and PHY status
Status Showtime
Channel: Interleave, UpInterleavestream rate = 969 Kbps, DownInterleavestream rate = 16069 Kbps
Link Power State: L0
Mode: ITU G.992.5(ADSL2PLUS)
Channel: Interleave
Line Status: Loss of Signal Quality
Training Status: Showtime
Down Up
SNR (dB): 3.0 6.3
Attn (dB): 41.0 12.3
Pwr (dBm): 0.0 10.3
Max(Kbps): 18292 1088
Rate (Kbps): 16069 969
Intl Depth: 96 4
G.dmt framing
R: 0 0
S: 0 0
😧 0 0
ADSL2 framing
MSGc: 0 0
R: 12 8
S: 0.31 5.89
😧 96 4
Counters
RS: 342523456 18133074
RSCorr: 0 49767
RSUnCorr: 56273 0
HEC: 0 29003
OCD: 0 0
LCD: 0 0
Total Cells: 1013348292 32238
Drop Cells: 0 0
Bit Errors: 0 0
ES: 28210 0
SES: 14271 0
UAS: 1198 1198
CRC: 56273 0
FEC: 0 49767
The CRC (56273) counter is getting constantly reseted and the ES and SES numbers are atrocious.
The CRC counter is reseted at 65535 and that is happening every 8-9 seconds.
I had couple of disconnects over night but all of them are starting with:
2014-08-27 04:04:34 [Informational] kernel: Link State: PVC_0 PPPoE down.
2014-08-27 04:04:36 [Informational] kernel: Link State: DSL link down.
Please let me know if I can do something to help. The line seems quiet, no crackling noises or other artifacts.
Re: Unstable DSL connection
27-08-2014 1:31 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
It looks like the connection seems to drop at specific times of day, I've included a graph below.
<img src="http://community.plus.net/visualradius/generated/image14091424732312.png"/>
Is there anything in the property/just outside that seems to come on around these times?
Its worth raising a fault with us so we can take a look into this further Raise a fault
Cheers,
Dan
Re: Unstable DSL connection
27-08-2014 1:40 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
I will raise a fault, thanks for the quick reply.
Re: Unstable DSL connection
27-08-2014 1:47 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: Unstable DSL connection
27-08-2014 5:19 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
100 60.0M 100 60.0M 0 0 1449k 0 0:00:42 0:00:42 --:--:-- 1681k
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 60.0M 100 60.0M 0 0 1486k 0 0:00:41 0:00:41 --:--:-- 1595k
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 60.0M 100 60.0M 0 0 1341k 0 0:00:45 0:00:45 --:--:-- 1008k
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 60.0M 100 60.0M 0 0 1249k 0 0:00:49 0:00:49 --:--:-- 983k
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 60.0M 100 60.0M 0 0 632k 0 0:01:37 0:01:37 --:--:-- 819k
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 60.0M 100 60.0M 0 0 737k 0 0:01:23 0:01:23 --:--:-- 601k
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 60.0M 100 60.0M 0 0 735k 0 0:01:23 0:01:23 --:--:-- 859k
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 60.0M 100 60.0M 0 0 840k 0 0:01:13 0:01:13 --:--:-- 872k
The last number on every line is showing a progressive depreciation of the speed too during the last 10 minutes I was running the test.
The test is a simple:
while true; do curl http://edgecache902-manchester.se.csp999-998.cdd.bt.net/PT/Random4000x4000.jpg -o /dev/null ;done
which is using the same object used by the wholesale speed test.
Re: Unstable DSL connection
28-08-2014 1:41 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
http://www.asus.com/uk/Networking/DSLN66U/HelpDesk_Download/
Re: Unstable DSL connection
28-08-2014 9:49 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Re: Unstable DSL connection
28-08-2014 9:55 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
adslphxcmd info --show
adslphxcmd: ADSL driver and PHY status
Status Showtime
Channel: Interleave, UpInterleavestream rate = 972 Kbps, DownInterleavestream rate = 16314 Kbps
Link Power State: L0
Mode: ITU G.992.5(ADSL2PLUS)
Channel: Interleave
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 2.1 6.7
Attn (dB): 41.0 12.3
Pwr (dBm): 0.0 10.3
Max(Kbps): 18556 1080
Rate (Kbps): 16314 972
Intl Depth: 96 4
G.dmt framing
R: 0 0
S: 0 0
😧 0 0
ADSL2 framing
MSGc: 0 0
R: 12 6
S: 0.30 5.88
😧 96 4
Counters
RS: 639610432 33446610
RSCorr: 0 2113
RSUnCorr: 17220 0
HEC: 0 18831
OCD: 0 0
LCD: 0 0
Total Cells: 1892273339 1020337
Drop Cells: 0 0
Bit Errors: 0 0
ES: 214 4
SES: 34 0
UAS: 78 78
CRC: 17220 0
FEC: 0 2113
ES and SES are still unacceptable high.
Re: Unstable DSL connection
01-09-2014 9:45 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Please let me know if there is anything else I can help with.
Re: Unstable DSL connection
01-09-2014 11:44 AM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Do we believe those router stats are true and have not been tweaked? A 41dB attenuated line at 6dB SNRM should deliver 8.6Mbps according to recognised calculators. The above stats report 16Mbps at 2dB SNRM. Something looks not quite right here! Has the DLM's arm been twisted here with a tweaked router, thereby giving rise to an elevated error rate and consequential instability?
What is the DLM's target SNRM for this line? What is the BTOR estimate for this line?
Kevin
In another browser tab, login into the Plusnet user portal BEFORE clicking the fault & ticket links
Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.
If this post helped, please click the Thumbs Up and if it fixed your issue, please click the This fixed my problem green button below.
Re: Unstable DSL connection
01-09-2014 12:31 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Forcing the SNRM to 6 - 9 or even 12 is NOT lowering the error rate in any way.
Re: Unstable DSL connection
01-09-2014 12:34 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
adslphxcmd: ADSL driver and PHY status
Status Showtime
Channel: Interleave, UpInterleavestream rate = 440 Kbps, DownInterleavestream rate = 12939 Kbps
Link Power State: L0
Mode: ITU G.992.5(ADSL2PLUS)
Channel: Interleave
Line Status: Loss of Signal Quality
Training Status: Showtime
Down Up
SNR (dB): 2.7 23.2
Attn (dB): 41.0 12.3
Pwr (dBm): 0.0 11.3
Max(Kbps): 14808 576
Rate (Kbps): 12939 440
Intl Depth: 64 8
G.dmt framing
R: 0 0
S: 0 0
😧 0 0
ADSL2 framing
MSGc: 0 0
R: 14 8
S: 0.45 4.00
😧 64 8
Counters
RS: 468132416 53447152
RSCorr: 0 21197
RSUnCorr: 62021 0
HEC: 0 7264
OCD: 0 0
LCD: 0 0
Total Cells: 1630958408 5317612
Drop Cells: 0 0
Bit Errors: 0 0
ES: 6406 0
SES: 135 0
UAS: 1862 1862
CRC: 62021 0
FEC: 0 21197
The up snrm used to be 7 db before the line has been tested for 24 hours by plusnet or their providers.
A fritz.box router on the same line is showing a attenuation of 30-32 as a linksys one too. The ES and SES error rates are consistent on all routers.
Re: Unstable DSL connection
01-09-2014 12:47 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
That is a really useful information - thank you. The synch speeds are completely in line with a 30dB attenuated line. That makes the synch speed "sensible". It does though start to cast doubt over the dependability of the router (and validity of its stats), given what the other two report.
@CRT what stats do the copper tests report - 30dB or 41dB?
Kevin
In another browser tab, login into the Plusnet user portal BEFORE clicking the fault & ticket links
Superusers are not staff, but they do have a direct line of communication into the business in order to raise issues, concerns and feedback from the community.
If this post helped, please click the Thumbs Up and if it fixed your issue, please click the This fixed my problem green button below.
Re: Unstable DSL connection
01-09-2014 1:02 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
These atten readings have been like this from the start.
Also the software framework they are using is, i think, based on the trendnet one. The software adsl driver is: FwVer:5.4.11.26_A_TC3095 HwVer:T14.F7_0.0 probably not of much help.
Copper initial results atten was 30.
Re: Unstable DSL connection
01-09-2014 3:44 PM
- Mark as New
- Bookmark
- Subscribe
- Subscribe to RSS Feed
- Highlight
- Report to Moderator
Just to check on this, is the account you're referencing the one that's linked to your forum login?
Just checking that account it seems you have a fault open and running further tests fails due to an open fault on the phone line so I wasn't able to see stats for some of the tests (including the copper line test) due to this phone fault.
- Subscribe to RSS Feed
- Mark Topic as New
- Mark Topic as Read
- Float this Topic for Current User
- Bookmark
- Subscribe
- Printer Friendly Page