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FttC speed has dropped off

mbanqua
Hooked
Posts: 9
Thanks: 2
Registered: ‎18-01-2014

FttC speed has dropped off

Wondering if anyone else has experienced this same issue and were they able to get Plusnet to do anything about it...

 

For years, I had a stable FTTC internet connection with a DS lync speed around 76000Kbps and an upstream one of 19999Kbps where the upstream and downstream SNR hovered between 5-7 dB.  However, about a year ago for no apparent reason whatsoever, my downstream lync speed dropped by almost 10K to 66997Kbps and the SNR has gone up to a consistent 8-9 (no change in the upstream SNR or lync speed). I've tried manually tweaking the SNR delta (-20) but no matter what I do, it still syncs at 8-9 dB. 

 

I raised a ticket with Plusnet about this issue almost a year ago and was told that this should eventually fix itself (DSLAM should kick in).  However, it's been more than a year and nothing has changed and so I am wondering if there's anything I can do to get Plusnet or BT to try and get the modem to lync back in the upper 70000KBps range like it did for years and years?

 

Any help or advice in terms of getting this fixed, or just getting Plusnet to understand and acknowledge the problem would be most appreciated.

 

For reference, attached below is a readout from the modem/router on the current status of the VSDL connection.... as you can see, the difference between the max attainable and actual DS rate is quite huge and the DS SNR ratio is 9dB -- more than enough to support a stable connection... I am using a Draytek 2860n router with the latest firmware I should add.

 


  ---------------------- ATU-R Info (hw: annex A, f/w: annex A/B/C) -----------
   Running Mode            :      17A       State                : SHOWTIME
   DS Actual Rate          : 66997000 bps   US Actual Rate       : 19999000 bps
   DS Attainable Rate      : 85463960 bps   US Attainable Rate   : 20902000 bps
   DS Path Mode            :        Fast    US Path Mode         :        Fast 
   DS Interleave Depth     :        1       US Interleave Depth  :        1 
   NE Current Attenuation  :       14 dB    Cur SNR Margin       :        9  dB
   DS actual PSD           :     6. 9 dB    US actual PSD        :    12. 6  dB
   NE CRC Count            :        0       FE CRC Count         :    85264
   NE ES Count             :        0       FE  ES Count         :    62324
   Xdsl Reset Times        :        0       Xdsl Link  Times     :        5
   ITU Version[0]          : 00000000       ITU Version[1]       : 00000000
   VDSL Firmware Version   : 05-07-06-0D-01-07   [with Vectoring support] 
   Power Management Mode   : DSL_G997_PMS_L0 
   Test Mode               : DISABLE 
  -------------------------------- ATU-C Info ---------------------------------
   Far Current Attenuation :       20 dB    Far SNR Margin       :        6  dB
   CO ITU Version[0]       : b5004244       CO ITU Version[1]    : 434da48c
   DSLAM CHIPSET VENDOR    : < BDCM >
 
3 REPLIES 3
Gandalf
Plusnet Help Team
Plusnet Help Team
Posts: 24,516
Thanks: 8,912
Fixes: 1,429
Registered: ‎21-04-2017

Re: FttC speed has dropped off

Hi there.

Our tests are showing your line to be banded at 67mbps and we're detecting a potential cable fault on the line which would likely be causing this. I've reported this through to Openreach and we've been given an estimated response time of by 05/03/19 23:59:59 for an engineer to go out and investigate further.

Let us know how your speeds look over the next few days.

For visibility I've attached the test results below if you're interested:

Test Outcome Pass
Test Outcome Code GTC_FTTC_SERVICE_0000
Description GEA service test completed and no fault found .
Main Fault Location OK
Sync Status In Sync
Downstream Speed 66.9 Mbps
Upstream Speed 20.0 Mbps
Appointment Required N
Fault Target Fix Time  
Fault Report Advised N
Estimated Line Length In Metres 410.7
Upstream Rate Assessment Very Good
Downstream Rate Assessment Reasonable
Interference Pattern Not Detected
Service Impact No Impact Observed
Home Wiring Problem Not Detected
Downstream Policing Discard Rate 0.0
Customer Traffic Level Upstream and Downstream Traffic Detected
Technology VDSL
NTE Power Status PowerOn
Voice Line Test Result Voice fault suspected - contact Voice CP to progress copper issue
Bridge Tap Not Detected
Radio Frequency Ingress  
Repetitive Electrical Impulse Noise Not Detected
Cross Talk  
Profile Name 0.128M-67M Downstream, Retransmission Low - 0.128M-20M Upstream, Error Protection Off
Time Stamp 2019-02-16T12:00:00
Parameters MIN MAX AVG
Down Stream Line Rate 66.9 Mbps 66.9 Mbps 66.9 Mbps
Up Stream Line Rate 19.9 Mbps 19.9 Mbps 19.9 Mbps
Up Time 899.0 Sec 900.0 Sec 899.9 Sec
Retrains 0.0 0.0 0.0
Current and Last 15 Minute Bin Performance
Parameters Last Traffic Count(Upto 15 mins) Current Traffic Count(Upto 15 mins)
Start Time Stamp 2019-03-01T11:25:57Z 2019-03-01T11:40:57Z
Ingress Code Violation 0 0
Egress Code Violation 0 0
Errored Seconds 0 0
Severely Errored Seconds 0 0
Unavailable Seconds 0 0
If this post resolved your issue please click the 'This fixed my problem' button
 Anoush Mortazavi
 Plusnet Help Team
mbanqua
Hooked
Posts: 9
Thanks: 2
Registered: ‎18-01-2014

Re: FttC speed has dropped off

Thanks Gandalf.  Appreciate you looking into the issue and acknowledging that something may actually be wrong rather than giving me the standard DSLAM "wait and see if it improves" or "your speeds are within the expected range" response...

 

I will definitely keep my eye on the speeds and let you know if I see any change.


Cheers!

 

Gandalf
Plusnet Help Team
Plusnet Help Team
Posts: 24,516
Thanks: 8,912
Fixes: 1,429
Registered: ‎21-04-2017

Re: FttC speed has dropped off

No problem, keep us posted.

If this post resolved your issue please click the 'This fixed my problem' button
 Anoush Mortazavi
 Plusnet Help Team