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:

Author Topic: Help with FTTC slowdown after line work  (Read 697 times)

David56

  • Just arrived
  • *
  • Posts: 10
Help with FTTC slowdown after line work
« on: July 11, 2018, 10:43:59 AM »

Hi all first time poster here

I have 2 FTTC Talk Talk lines here

1 business 1 residential

The  residential line went dead last week (the overhead line from the pole was broken) Openreach soon came to fix it, but while fixing it at the pole end my business line went on and off a good number of times so now my business FTTC has slowed from around 41000 to a sync of 34998

I use a Draytek 2760 and do not have any Wifi in use

here is the latest info from the Drayek

Up time 2h 53m

ATU-R Information
           Type:   VDSL2
           Hardware:   Annex A
           Firmware:   05-07-06-0D-01-07
           Power Mngt Mode:   DSL_G997_PMS_L0
           Line State:   SHOWTIME
           Running Mode:   17A
           Vendor ID:   b5004946 544e0000
ATU-C Information
          Vendor ID:   b5004244 434da48c [BDCM]
Line Statistics
        
   Downstream               Upstream               
Actual Rate   34998   Kbps   7079   Kbps
Attainable Rate   38894   Kbps   7124   Kbps
Path Mode   Fast   Fast
Interleave Depth   1   1
Actual PSD   2. 2   dB   11. 5   dB
   Near End                    Far End                   
Trellis   ON   ON
Bitswap   ON   ON
ReTx   1       1   
SNR Margin   7   dB   6   dB
Attenuation   23   dB   27   dB
CRC   0   134652
FECS   0   s   233313   s
ES   0   s   117187   s
SES   0   s   29   s
LOSS   0   s   0   s
UAS   35   s   204164   s
HEC Errors   0   0
RS Corrections   0   0
LOS Failure   0   0
LOF Failure   0   0
LPR Failure   0   0
NCD Failure   0   0
LCD Failure   0   0
NFEC   32   32
RFEC   16   16
LYSMB   16   16

Edit - and after 5h 53m

Type:   VDSL2
           Hardware:   Annex A
           Firmware:   05-07-06-0D-01-07
           Power Mngt Mode:   DSL_G997_PMS_L0
           Line State:   SHOWTIME
           Running Mode:   17A
           Vendor ID:   b5004946 544e0000
ATU-C Information
          Vendor ID:   b5004244 434da48c [BDCM]
Line Statistics
        
   Downstream               Upstream               
Actual Rate   34998   Kbps   7079   Kbps
Attainable Rate   38731   Kbps   7124   Kbps
Path Mode   Fast   Fast
Interleave Depth   1   1
Actual PSD   2. 2   dB   11. 5   dB
   Near End                    Far End                   
Trellis   ON   ON
Bitswap   ON   ON
ReTx   1       1   
SNR Margin   7   dB   6   dB
Attenuation   23   dB   27   dB
CRC   0   134652
FECS   0   s   233321   s
ES   0   s   117187   s
SES   0   s   29   s
LOSS   0   s   0   s
UAS   35   s   204164   s
HEC Errors   0   0
RS Corrections   0   0
LOS Failure   0   0
LOF Failure   0   0
LPR Failure   0   0
NCD Failure   0   0
LCD Failure   0   0
NFEC   32   32
RFEC   16   16
LYSMB   16   16

I had to do come cleaning here this morning so the Drayek was unplugged for about an hour from the line

Before this morning the sync was the same as it is now

I am guessing the line is now banded is that the case?

Trying to talk to support at the ISP is like pulling teeth so any help anyone can give would be great. I would even move ISP if that would get things back on track

Speeds here are slow as it is without this problem. We are in a BDUK FTTC area but we never see great speeds this end of the village

The local council who put in the system in say "no speed issue" we take is as working if you get 21+, wow I got 15 with ADSL2 

Oh I forgot to mention I am awaiting a new router for my res line so I am not able to see how that is doing
« Last Edit: July 11, 2018, 01:51:49 PM by David56 »
Logged

j0hn

  • Kitizen
  • ****
  • Posts: 1916
Re: Help with FTTC slowdown after line work
« Reply #1 on: July 11, 2018, 03:23:49 PM »

Yes the line has been banded.
It needs a DLM reset, an ISP switch, or lots of patience.
Logged
BT FTTC 55/10 ECI now Huawei cab
Zyxel VMG1312-B10A bridge mode with 1508 MTU + Asus RT-AC68U running Asuswrt-Merlin

Ixel

  • Kitizen
  • ****
  • Posts: 1077
Re: Help with FTTC slowdown after line work
« Reply #2 on: July 11, 2018, 03:34:18 PM »

Indeed, unfortunately the line has been banded presumably due to one or more of the following:
- Multiple resyncs in a short timeframe
- MTBR red threshold has been exceeded
- SNRM variance exceeded a certain threshold within a 24 hour timeframe (I believe this to be 4 dB) *

* I've noticed banding happens, without interleaving, when this occurs. The patent for the ADSLx DLM mentioned an SNRM variance threshold and in that document it was 4 dB. I believe this to be the case for VDSL2/FTTC as well.

I believe TalkTalk Business are part of the remote DLM reset trial, I'm not sure about TalkTalk Retail though.
Logged

David56

  • Just arrived
  • *
  • Posts: 10
Re: Help with FTTC slowdown after line work
« Reply #3 on: July 11, 2018, 03:34:58 PM »

Hi

Thanks for the info

I would imagine getting TT business to understand what a DLM reset is will be a nightmare so wait or change ISP I guess
Logged

Ixel

  • Kitizen
  • ****
  • Posts: 1077
Re: Help with FTTC slowdown after line work
« Reply #4 on: July 11, 2018, 03:36:33 PM »

Hi

Thanks for the info

I would imagine getting TT business to understand what a DLM reset is will be a nightmare so wait or change ISP I guess

AAISP have done a DLM reset for me previously via TTB, but as I understand TTB are slow to act or respond to such requests. A while ago they weren't part of the trial so couldn't do it at all.
Logged

David56

  • Just arrived
  • *
  • Posts: 10
Re: Help with FTTC slowdown after line work
« Reply #5 on: July 11, 2018, 04:08:53 PM »

Hi

Thanks for all the reply's

Here are the latest figures with  System Up Time    8:13:26

and SWMBO has had HDR tennis via BBC iplayer on non stop over the connection since 13:00 and it is still on

Can't see much wrong with the download stats unless I am missing something if it stays like that any idea when it might get better speed
   
   Downstream               Upstream               
Actual Rate   34998   Kbps   7079   Kbps
Attainable Rate   38938   Kbps   7124   Kbps
Path Mode   Fast   Fast
Interleave Depth   1   1
Actual PSD   2. 2   dB   11. 5   dB
   Near End                    Far End                   
Trellis   ON   ON
Bitswap   ON   ON
ReTx   1       1   
SNR Margin   7   dB   6   dB
Attenuation   23   dB   27   dB
CRC   0   134652
FECS   0   s   233336   s
ES   0   s   117187   s
SES   0   s   29   s
LOSS   0   s   0   s
UAS   35   s   204164   s
HEC Errors   0   0
RS Corrections   0   0
LOS Failure   0   0
LOF Failure   0   0
LPR Failure   0   0
NCD Failure   0   0
LCD Failure   0   0
NFEC   32   32
RFEC   16   16
LYSMB   16   16
Logged

Ixel

  • Kitizen
  • ****
  • Posts: 1077
Re: Help with FTTC slowdown after line work
« Reply #6 on: July 11, 2018, 04:52:31 PM »

DLM is not known to quickly relax the banding, it can sometimes take months or longer before it eventually relaxes or restores the original package speed banding.
Logged

David56

  • Just arrived
  • *
  • Posts: 10
Re: Help with FTTC slowdown after line work
« Reply #7 on: July 12, 2018, 08:17:46 AM »

Hi all

Well something happened during the night here

Here are the errors that came in

CRC   13   134652
FECS   0   s   233346   s
ES   8   s   117187   s
SES   0   s   29   s
LOSS   0   s   0   s
UAS   35   s   204164   s

No idea what UAS is but I guess CRC is cyclic redundancy check

I will continue to keep an eye during today
Logged

tubaman

  • Kitizen
  • ****
  • Posts: 2253
Re: Help with FTTC slowdown after line work
« Reply #8 on: July 12, 2018, 08:34:06 AM »

Appears to be just a few errored seconds on the downstream side. Nothing to be concerned about given the very low numbers.
UAS is Unavailable Seconds and starts clocking-up if the link drops or while it resyncs. I'm not sure why you have the crazy high number on the upstream counter, but it hasn't changed since your last resync.
 :)
Logged
BT FTTC 80/20 Huawei Cab - Netgear D6220

David56

  • Just arrived
  • *
  • Posts: 10
Re: Help with FTTC slowdown after line work
« Reply #9 on: July 12, 2018, 08:47:38 AM »

Hi

Thanks for your reply, I am very grateful and learning all the time about all this stuff

Shame the council scheme we had put in left us with such low speed so every mb counts

I was amazed they planned for min 21mb down speed !! - good way to keep down the cost I guess 
Logged

Ixel

  • Kitizen
  • ****
  • Posts: 1077
Re: Help with FTTC slowdown after line work
« Reply #10 on: July 12, 2018, 09:21:07 AM »

Appears to be just a few errored seconds on the downstream side. Nothing to be concerned about given the very low numbers.
UAS is Unavailable Seconds and starts clocking-up if the link drops or while it resyncs. I'm not sure why you have the crazy high number on the upstream counter, but it hasn't changed since your last resync.
 :)

That's the DSLAM's 'all-time' counters. The port probably had nothing connected for quite some time so kept incrementing UAS.
Logged

David56

  • Just arrived
  • *
  • Posts: 10
Re: Help with FTTC slowdown after line work
« Reply #11 on: July 12, 2018, 12:07:25 PM »

Thanks you Ixel for the info

Well midday here and I have got

   Near End                    Far End                   
Trellis   ON   ON
Bitswap   ON   ON
ReTx   1       1   
SNR Margin   7   dB   6   dB
Attenuation   23   dB   27   dB
CRC   13   134652
FECS   0   s   233349   s
ES   8   s   117187   s
SES   0   s   29   s
LOSS   0   s   0   s
UAS   35   s

No more errors in the download, I wonder what happened in the night hours last night
Logged

David56

  • Just arrived
  • *
  • Posts: 10
Re: Help with FTTC slowdown after line work
« Reply #12 on: July 12, 2018, 07:12:46 PM »

Well 19:00 and

SNR Margin   7   dB   6   dB
Attenuation   23   dB   27   dB
CRC   17   134652
FECS   0   s   233357   s
ES   11   s   117187   s
SES   0   s   29   s
LOSS   0   s   0   s
UAS   35   s   204164   s
HEC Errors   0   0

not much change
Logged

David56

  • Just arrived
  • *
  • Posts: 10
Re: Help with FTTC slowdown after line work
« Reply #13 on: July 16, 2018, 09:25:55 AM »

Well things have moved on (a bit) TT now say they are going to maybe get the line "reset" so that is good

I have also picked up a HG612 as I am reading the 612 is better than my draytek 2760 at holding on to a line as the 612 has the same chipset as my BT cabinet

I have got an IT guy coming here Friday to rip out all the cables on site along with all the outletplates and replace with all new kit so fingers crossed that will kill or cure the problems

Latest stats

Uptime 121:31:07

Line Statistics
        
   Downstream               Upstream               
Actual Rate   34998   Kbps   7079   Kbps
Attainable Rate   38173   Kbps   7124   Kbps
Path Mode   Fast   Fast
Interleave Depth   1   1
Actual PSD   2. 2   dB   11. 5   dB
   Near End                    Far End                   
Trellis   ON   ON
Bitswap   ON   ON
ReTx   1       1   
SNR Margin   7   dB   6   dB
Attenuation   23   dB   27   dB
CRC   181   134652
FECS   0   s   233462   s
ES   53   s   117187   s
SES   2   s   29   s
LOSS   0   s   0   s
UAS   35   s   204164   s
HEC Errors   0   0
RS Corrections   0   0
LOS Failure   0   0
LOF Failure   0   0
LPR Failure   0   0
NCD Failure   0   0
LCD Failure   0   0
NFEC   32   32
RFEC   16   16
LYSMB   16   16
Logged