Kitz ADSL Broadband Information
adsl spacer  
Support this site
Home Broadband ISPs Tech Routers Wiki Forum
 
     
   Compare ISP   Rate your ISP
   Glossary   Glossary
 
Please login or register.

Login with username, password and session length
Advanced search  

News:

Pages: [1] 2 3

Author Topic: Modem Errors..  (Read 1597 times)

8062282

  • Member
  • **
  • Posts: 31
Modem Errors..
« on: June 23, 2019, 12:16:13 AM »

I used to get approx 7mb download & that's depreciated to 4mb. I had a BTOR engineer out on the 14th June due to widely fluctuating SNR & occasional disconnects. The line tested OK (at the time). He went & did some work at the cabinet & changed the D & E connections. He also had to get my ISP to remove a 4mb cap on my line, despite them telling me they don't cap lines. Not sure who's telling the truth..

In the early hours of the 15th, (I woke up early) the DLM had kicked in & my attainable rate had gone up to 8620 & my line rate was 7774. Great, I thought, I'm back to my normal speed. 1 & half hours later, the speed dropped to 4519. It's since dropped to 4059. The SNR is rock solid at 6dB.

I complained to my ISP about this drop, pointing out what I used to get & what I got (briefly) on the 15th. I've asked numerous questions about the DLM & the criteria it uses. All have gone unanswered. Every night my modem is reporting high ES but nothing during the day. When we go to bed there's maybe 6/7 ES, when we get up in the morning, there's roughly 200. According to the DLM calculator, that amount of errors shouldn't be problem. Despite this, the DLM isn't for increasing my speed. It's stuck at 4059. I'm wondering if they've capped my line at 4mb again despite them saying they don't..

I'm just banging my head against a brick wall getting any sense out of my ISP. They're answering my posts on their forum but conveniently not answering the questions about the DLM profiles they use or the criteria the DLM uses. All of a sudden after hitting a brick wall with them, my modem is no longer reporting any errors. I use a Billion BiPAC 7800DXL & in the xDSL there's not one error being reported.

HEC Errors         0   0
OCD Errors        0   0
LCD Errors         0   0
Total Cells          19852276   4612340
Data Cells          1290478   130359
Bit Errors           0   0
Total ES             0   0
Total SES           0   0
Total UAS           0   0

Can an ISP stop errors being reported?  I can't complain about errors, if I can't see them. I've decreased my SNR to 3dB just to see if any errors would start to appear, they haven't. My attainable rate is now 5800 & my line rate is still at 4059. Oddly the SNR is being reported as 5db even though I've set it at 3dB. I've only changed the SNR today so I will leave it overnight & see if anything changes by morning...

Any help or suggestions welcome..
Logged
Honesty is the first chapter in the book of wisdom...

burakkucat

  • Global Moderator
  • Senior Kitizen
  • *
  • Posts: 26894
  • Over the Rainbow Bridge
    • The ELRepo Project
Re: Modem Errors..
« Reply #1 on: June 23, 2019, 12:43:06 AM »

Welcome to the Kitz forum.  :)

Having carefully read through the details of your post, I think I can fill in some of the gaps --
  • An ADSL based service.
  • Most likely a LLU service provider.
  • Banging your head against a wall strongly hints at TalkTalk being the service provider.
If interleaving has been applied to the circuit then there is the possibility that all errors are under control and, thus, there is nothing to report.

Does your Billion 7800DXL report CRCs and FECs? Ideally we would like to see the CRC, FEC, ES and SES counts over, say, a 24 hour period.
Logged
:cat:  100% Linux and, previously, Unix. Co-founder of the ELRepo Project.

Please consider making a donation to support the running of this site.

Weaver

  • Addicted Kitizen
  • *****
  • Posts: 7451
  • Retd sw dev; A&A; 4 ◊ 7km ADSL2; IPv6; Firebrick
Re: Modem Errors..
« Reply #2 on: June 23, 2019, 03:15:12 AM »


    W E L C O M E   T O   T H E   F O R U M   !
         Very warmest welcome from me!

You wrote:
> Can an ISP stop errors being reported?

No. Those numbers,such as Errored Secs (over what period?), are just between your modem and the modem at the other end - the DSLAM, I assume in this case, because you havenít given full details of exactly what your service is.

An ISP doesnít generally interfere with modems although some modems are set up to allow remote control by the ISP. That remote control can be disabled though, so that the user is in total control of the modem. My modems are a perfect example, reprogrammed by me with a lot of help from learned members if the forum so that the ISP no longer has any control over them.
« Last Edit: June 23, 2019, 03:17:48 AM by Weaver »
Logged

8062282

  • Member
  • **
  • Posts: 31
Re: Modem Errors..
« Reply #3 on: June 23, 2019, 07:41:13 AM »

Thanks Weaver & Burakkucat for the responses & thanks for the welcome...

Yes it is TT.  I'm not that well up on internet stuff & modems so forgive me if I sound a bit vague at times. I am learning though..

The modem doesn't appear to report the FEC errors or CRC's in the xDSL part unless they're called something else. I did a soft reset of the modem at 23.26 to see if the modem had got 'stuck' & wasn't picking any errors up. There wasn't any ES an hour later.

I'm up now & have just checked the modem stats which only go from 00.30 this morning & this is what it's saying:

Super Frames               1556563   1406425
Super Frame Errors                23   1
RS Words                     202353181   4259735
RS Correctable Errors      624   3
RS Uncorrectable Errors       1729   0

After trying to find out for about 4/5 days what time these night times ES were occurring & getting nowhere, I resorted to downloading DSLstats yesterday, although I haven't left it running overnight yet..

This morning, after days of getting about 200 ES overnight, there's only been 12 ES since 00.30 last night.

It was only when I got NOW Tv to watch Game of Thrones did my problems start. My speed had slowed to a pitiful 1595 & of course, I couldn't watch GoT on the TV. Watching it huddled over an iPad didn't quite have the same enjoyment about it..

I just don't seem to getting anywhere with TT. I'm not on contract with TT as I was a transferred from Virgin when they decided they didn't want ADSL customers anymore. I just want them to help regards getting my speed back to where it was. I wasn't one for checking stats all the time & as long as I could do what I wanted to do, I was happy. Speed got a bit slow at times but a hard reset of the modem usually sorted that out. As I'm not on contract with TT, I don't know whether their 'guaranteed 2.6mb download' speed applies. If it does, I'm up the creek without a paddle..

The modem has been connected to the test socket since the 20th May as the extension where the modem was originally connected, was proving unreliable, which is why my speed had reduced. Now everything is stable on the test socket, TT don't seem the slightest bit interested about the speed I was getting, nor are they interested in helping me get that speed back. The last recorded measurement of the speed I used to get was July '16 & that was 7.18mb over wireless on an iPhone 4s. So, apart from a line rate of 7774 for about 1 & half hours on the 15th June after the engineer had been, my speed has slowly decreased to 4059..

Any views on why my modem is reporting the SNR as 5dB when I've reduced it to 3dB?   With congestion etc, could I have lost 3mb since July '16? 

Unfortunately my cabinet is full or I'd have been off to another ISP on fibre. I'm now looking at moving onto another ISP for broadband with the hope of upgrading to fibre with them when there's space in the cabinet. I can't believe I've been stupid enough to pay £24 a month for this & that doesn't even include line rental. What I don't want to do, is take a fault with me & have to start over again with another ISP.

Apologies for the long post  :)

Logged
Honesty is the first chapter in the book of wisdom...

parkdale

  • Reg Member
  • ***
  • Posts: 288
Re: Modem Errors..
« Reply #4 on: June 23, 2019, 11:40:18 AM »

Do you have any wiring extensions off the Master socket, and is the bell (3) wire still connected?
Are you using the Telnet cli to look at your stats?

I'm using John Lewis as my ISP, they have a ADSL service which is unlimited for £20 (but upto 10Mb which is fairly common point for most ISP's)
I use them because it's "Plusnet with better customer service, and Plusnet is owned by BT"

Have you tried the https://www.dslchecker.bt.com to see what it available?
« Last Edit: June 23, 2019, 11:42:36 AM by parkdale »
Logged

8062282

  • Member
  • **
  • Posts: 31
Re: Modem Errors..
« Reply #5 on: June 23, 2019, 11:57:25 AM »

Hi - There is a extension off the master socket but it's disconnected at the moment. The modem is connected to the test socket & has been since 20th May. What do I need to be looking at in the Telnet data?

The cabinet is full so I can't get fibre at the moment. There was some slots available about a month ago but I spent too long faffing around deciding who to go with. When I'd decided, the cabinet was full again  :(



« Last Edit: June 23, 2019, 12:01:22 PM by 8062282 »
Logged
Honesty is the first chapter in the book of wisdom...

parkdale

  • Reg Member
  • ***
  • Posts: 288
Re: Modem Errors..
« Reply #6 on: June 23, 2019, 12:05:08 PM »

adsl info --stats  :fingers:
Logged

8062282

  • Member
  • **
  • Posts: 31
Re: Modem Errors..
« Reply #7 on: June 23, 2019, 12:42:02 PM »

Thanks...



adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason:    0
Last initialization procedure status:   0
Max:    Upstream rate = 972 Kbps, Downstream rate = 5260 Kbps
Bearer: 0, Upstream rate = 874 Kbps, Downstream rate = 4095 Kbps


Link Power State:       L0
Mode:                   ADSL2+ Annex A
TPS-TC:                 ATM Mode(0x0)
Trellis:                U:ON /D:ON
Line Status:            No Defect
Training Status:        Showtime
                Down            Up
SNR (dB):        5.3             7.5
Attn(dB):        41.5            21.6
Pwr(dBm):        19.7            10.4


                        ADSL2 framing
                        Bearer 0
MSGc:           59              66
B:              63              13
M:              1               16
T:              2               2
R:              16              16
S:              0.4961          7.9012
L:              1290            243
D:              64              2


                        Counters
                        Bearer 0
SF:             690247          626023
SFErr:          6               1
RS:             89732077                1336325
RSCorr:         116             6
RSUnCorr:       364             0


                        Bearer 0
HEC:            57              0
OCD:            2               0
LCD:            2               0
Total Cells:    107508739               23380971
Data Cells:     7219577         1189254
Drop Cells:     0
Bit Errors:     0               0


ES:             2               1
SES:            0               0
UAS:            0               0
AS:             11129


                        Bearer 0
INP:            3.00            0.50
INPRein:        0.00            0.00
delay:          8               4
PER:            16.12           17.77
OR:             32.25           32.40
AgR:            4111.93 903.67


Bitswap:        116/118         232/232


Total time = 3 hours 5 min 29 sec
FEC:            116             6
CRC:            6               1
ES:             2               1
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
Latest 15 minutes time = 5 min 29 sec
FEC:            0               0
CRC:            0               0
ES:             0               0
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
Previous 15 minutes time = 15 min 0 sec
FEC:            8               0
CRC:            0               0
ES:             0               0
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
Latest 1 day time = 3 hours 5 min 29 sec
FEC:            116             6
CRC:            6               1
ES:             2               1
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
Previous 1 day time = 0 sec
FEC:            0               0
CRC:            0               0
ES:             0               0
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
Since Link time = 3 hours 5 min 29 sec
FEC:            116             6
CRC:            6               1
ES:             2               1
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
 >
Logged
Honesty is the first chapter in the book of wisdom...

parkdale

  • Reg Member
  • ***
  • Posts: 288
Re: Modem Errors..
« Reply #8 on: June 23, 2019, 02:23:26 PM »

Now post your stats again in about 24hrs + with no reboots....
Logged

Weaver

  • Addicted Kitizen
  • *****
  • Posts: 7451
  • Retd sw dev; A&A; 4 ◊ 7km ADSL2; IPv6; Firebrick
Re: Modem Errors..
« Reply #9 on: June 23, 2019, 07:04:56 PM »

My friend, if you get truly fed up with your current ISP, Andrews and Arnold will guarantee to fix your line and they are superb. I use them. Superb doesnít usually come cheap for obvious reasons.
https://www.aa.net.uk/broadband/we-will-fix-your-line/
Logged

8062282

  • Member
  • **
  • Posts: 31
Re: Modem Errors..
« Reply #10 on: June 24, 2019, 04:25:29 PM »

Now post your stats again in about 24hrs + with no reboots....


When I got up this morning, the attainable rate had increased to 7800 but the line rate was still stuck at 4059. Contacted TT as I thought my line might have been capped. They've restarted DLM & the sync speed went up & then it's gone down again:


Jun 24 10:56:27 daemon warn kernel: bcmxtmcfg: Connection UP, LinkActiveStatus=0x1, US=860000, DS=8189000
Jun 24 13:07:47 daemon warn kernel: bcmxtmcfg: Connection UP, LinkActiveStatus=0x1, US=885000, DS=4679000


Lots of errors today..



adsl info --stats
adsl: ADSL driver and PHY status
Status: Showtime
Last Retrain Reason:    1
Last initialization procedure status:   0
Max:    Upstream rate = 984 Kbps, Downstream rate = 5068 Kbps
Bearer: 0, Upstream rate = 885 Kbps, Downstream rate = 4679 Kbps


Link Power State:       L0
Mode:                   ADSL2+ Annex A
TPS-TC:                 ATM Mode(0x0)
Trellis:                U:ON /D:ON
Line Status:            No Defect
Training Status:        Showtime
                Down            Up
SNR (dB):        5.1             8.0
Attn(dB):        42.0            21.6
Pwr(dBm):        19.6            10.4


                        ADSL2 framing
                        Bearer 0
MSGc:           59              66
B:              146             13
M:              1               16
T:              1               2
R:              10              16
S:              0.9984          7.8049
L:              1258            246
D:              32              2


                        Counters
                        Bearer 0
SF:             729833          674370
SFErr:          26              15
RS:             47439024                1767624
RSCorr:         1206            90
RSUnCorr:       460             0


                        Bearer 0
HEC:            240             3
OCD:            4               0
LCD:            4               0
Total Cells:    130680418               26841091
Data Cells:     2816338         1174707
Drop Cells:     0
Bit Errors:     0               0


ES:             252             14
SES:            21              0
UAS:            68              48
AS:             11841


                        Bearer 0
INP:            1.00            0.50
INPRein:        0.00            0.00
delay:          8               4
PER:            16.22           17.56
OR:             32.05           32.80
AgR:            4693.15 914.82


Bitswap:        288/293         226/226


Total time = 1 days 6 hours 49 min 9 sec
FEC:            42912           131
CRC:            1402            26
ES:             252             14
SES:            21              0
UAS:            68              48
LOS:            2               0
LOF:            8               0
LOM:            0               0
Latest 15 minutes time = 4 min 9 sec
FEC:            38              0
CRC:            0               0
ES:             0               0
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
Previous 15 minutes time = 15 min 0 sec
FEC:            1               0
CRC:            0               0
ES:             0               0
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
Latest 1 day time = 6 hours 49 min 9 sec
FEC:            33500           99
CRC:            1309            16
ES:             204             7
SES:            21              0
UAS:            68              48
LOS:            2               0
LOF:            8               0
LOM:            0               0
Previous 1 day time = 24 hours 0 sec
FEC:            9412            32
CRC:            93              10
ES:             48              7
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
Since Link time = 3 hours 17 min 21 sec
FEC:            1206            90
CRC:            26              15
ES:             15              6
SES:            0               0
UAS:            0               0
LOS:            0               0
LOF:            0               0
LOM:            0               0
 >


 
Logged
Honesty is the first chapter in the book of wisdom...

parkdale

  • Reg Member
  • ***
  • Posts: 288
Re: Modem Errors..
« Reply #11 on: June 24, 2019, 05:53:10 PM »

Ok so... not too bad for CRC errors seen worse. I would watch the Attenuation closely as it appears to move up and down :-\ . I had this before on my line, turned to to be water on the u/g section of the line.
How much / quality of cable connecting the modem to the  wall socket do you have? if you can make it as short as possible, and using good screened interconnect. Mines 50cm and it does make a small difference, about 2db.

Like this https://www.ebay.co.uk/itm/Cat6-BT-Infinity-2M-Modem-cable-VDSL-RJ11-to-RJ11-High-speed-Broadband-router/323748698639?hash=item4b60ed1a0f:g:fgkAAOSwiZhcaF42

There are people better qualified than me, who will take a deeper look at lose stats, and hopefully give you a more detailed response  :fingers:


Added cable to comments
« Last Edit: June 24, 2019, 05:58:13 PM by parkdale »
Logged

8062282

  • Member
  • **
  • Posts: 31
Re: Modem Errors..
« Reply #12 on: June 24, 2019, 06:59:41 PM »

Hi - Thanks for the link to the cable. I may invest in one of those. The attenuation has ranged from 44 - 41.5.   When the DLM was reset the CRC's & FEC's went a bit crazy until the DLM reduced the speed. It's so frustrating. Getting TT interested in sorting this issue out is really hard.

I'll need to look at the graphs & see if there's any noticeable spikes & times...
Logged
Honesty is the first chapter in the book of wisdom...

8062282

  • Member
  • **
  • Posts: 31
Re: Modem Errors..
« Reply #13 on: June 28, 2019, 07:04:19 PM »

Hi - Can anybody help in explaining this please? Every night between 22.30 & 05.30, there a big increase in errors. I don't really understand this graph. As you can see the bitswaps per minute go up at the time the errors start & finish approx 5.30. What is the scale on the left?  Do the bitswaps look normal till 22.30?



Logged
Honesty is the first chapter in the book of wisdom...

roseway

  • Administrator
  • Senior Kitizen
  • *
  • Posts: 39471
  • Penguins CAN fly
    • DSLstats
Re: Modem Errors..
« Reply #14 on: July 03, 2019, 03:53:39 PM »

Hi - Does DSLstats show all errors up, including the CRC/FEC errors etc that are below the SNR threshold?  I have an issue with noise at night but my ISP is claiming there is noise as well during the day. All I can see is an occasional spike and the CRC/ES/FEC errors are low.  If I didn't have the huge spike in errors at night, I'm almpost sure the DLM wouldn't keep reducing my speed.

Did you mean to post that in an impossibly small font? Here it is in normal size:

"Hi - Does DSLstats show all errors up, including the CRC/FEC errors etc that are below the SNR threshold?  I have an issue with noise at night but my ISP is claiming there is noise as well during the day. All I can see is an occasional spike and the CRC/ES/FEC errors are low.  If I didn't have the huge spike in errors at night, I'm almpost sure the DLM wouldn't keep reducing my speed."
Logged
  Eric
Pages: [1] 2 3