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    Download Speed Collapses

    This is a discussion on Download Speed Collapses within the Sky Broadband help forums, part of the Sky Broadband help and support category; Stayed connected overnight. These are the stats at 06.08. /usr/sbin/adslctl: ADSL driver and PHY status Status: Showtime Channel: FAST, Upstream ...

    1. #11
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      Re: Download Speed Collapses

      Stayed connected overnight.
      These are the stats at 06.08.

      /usr/sbin/adslctl: ADSL driver and PHY status
      Status: Showtime Channel: FAST, Upstream rate = 764 Kbps, Downstream rate = 14235 Kbps
      Link Power State: L0
      Mode: ADSL2+
      Channel: Fast
      Trellis: ON
      Line Status: No Defect
      Training Status: Showtime
      Down Up
      SNR (dB): 8.2 12.0
      Attn(dB): 26.0 13.1
      Pwr(dBm): 1.3 12.4
      Max(Kbps): 14236 864
      Rate (Kbps): 14235 764
      G.dmt framing
      K: 239(0) 24
      R: 16 16
      S: 1 8
      D: 64 8
      ADSL2 framing
      MSGc: 114 68
      B: 238 23
      M: 1 8
      T: 1 1
      R: 16 16
      S: 0.5350 7.7037
      L: 3813 216
      D: 64 8
      Counters
      SF: 1947723 1947721
      SFErr: 5 1
      RS: 233726786 16555628
      RSCorr: 187864 620756994
      RSUnCorr: 187 0

      HEC: 4 0
      OCD: 0 0
      LCD: 0 0
      Total Cells: 1049567927 56322578
      Data Cells: 1056399 200441
      Drop Cells: 0
      Bit Errors: 0 0

      ES: 6 1
      SES: 2 0
      UAS: 14 16
      Total time = 8 hours 41 min 21 sec
      SF = 1947723
      CRC = 5
      LOS = 2
      LOF = 0
      ES = 6
      Latest 1 day time = 8 hours 41 min 21 sec
      SF = 1947723
      CRC = 5
      LOS = 2
      LOF = 0
      ES = 6
      Latest 15 minutes time = 11 min 21 sec
      SF = 42483
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      Previous 15 minutes time = 15 min 0 sec
      SF = 56062
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      Previous 1 day time = 0 sec
      SF = 0
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      15 minutes interval [-30 min to -15 min] time = 15 min 0 sec
      SF = 56062
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
      SF = 56125
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
      SF = 56062
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0


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    3. #12
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      Re: Download Speed Collapses

      They look Ok, was the connection in use? heavy use downloading or something tends to show up issues.

    4. #13
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      Re: Download Speed Collapses

      I have done heavy downloading for the past 3 hours.

      These are the stats now.
      Lots more errors.

      /usr/sbin/adslctl: ADSL driver and PHY status
      Status: Showtime Channel: FAST, Upstream rate = 764 Kbps, Downstream rate = 14235 Kbps
      Link Power State: L0
      Mode: ADSL2+
      Channel: Fast
      Trellis: ON
      Line Status: No Defect
      Training Status: Showtime
      Down Up
      SNR (dB): 8.2 12.0
      Attn(dB): 26.0 13.1
      Pwr(dBm): 1.3 12.4
      Max(Kbps): 14236 864
      Rate (Kbps): 14235 764
      G.dmt framing
      K: 239(0) 24
      R: 16 16
      S: 1 8
      D: 64 8
      ADSL2 framing
      MSGc: 114 68
      B: 238 23
      M: 1 8
      T: 1 1
      R: 16 16
      S: 0.5350 7.7037
      L: 3813 216
      D: 64 8
      Counters
      SF: 3664782 3664780
      SFErr: 1383 1
      RS: 439773882 31150630
      RSCorr: 10997274 864080
      RSUnCorr: 23654 0

      HEC: 1393 0
      OCD: 0 0
      LCD: 0 0
      Total Cells: 1974806670 106015833
      Data Cells: 65673158 1460914
      Drop Cells: 0
      Bit Errors: 0 0

      ES: 31 1
      SES: 25 0
      UAS: 14 16
      Total time = 16 hours 20 min 41 sec
      SF = 3664782
      CRC = 1383
      LOS = 2
      LOF = 0
      ES = 31
      Latest 1 day time = 16 hours 20 min 41 sec
      SF = 3664782
      CRC = 1383
      LOS = 2
      LOF = 0
      ES = 31
      Latest 15 minutes time = 5 min 41 sec
      SF = 21304
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      Previous 15 minutes time = 15 min 0 sec
      SF = 56062
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      Previous 1 day time = 0 sec
      SF = 0
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      15 minutes interval [-30 min to -15 min] time = 15 min 0 sec
      SF = 56062
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
      SF = 56062
      CRC = 1376
      LOS = 0
      LOF = 0
      ES = 24
      15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
      SF = 56125
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0

    5. #14
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      Re: Download Speed Collapses

      Oh dear back to square one again!

      SF = 56062
      CRC = 1376
      LOS = 0
      LOF = 0
      ES = 24

      Was this from the test socket with nothing else plugged in? if so looks like you have a line problem.

    6. #15
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      Re: Download Speed Collapses

      Exactly as you say.
      Are there any procedures or is this how it will be?
      Is there any point in continuing using the test socket only?
      These are the stats at 16.15

      usr/sbin/adslctl: ADSL driver and PHY status
      Status: Showtime Channel: FAST, Upstream rate = 764 Kbps, Downstream rate = 14235 Kbps
      Link Power State: L0
      Mode: ADSL2+
      Channel: Fast
      Trellis: ON
      Line Status: No Defect
      Training Status: Showtime
      Down Up
      SNR (dB): 8.1 12.5
      Attn(dB): 26.0 13.1
      Pwr(dBm): 1.3 12.4
      Max(Kbps): 14236 864
      Rate (Kbps): 14235 764
      G.dmt framing
      K: 239(0) 24
      R: 16 16
      S: 1 8
      D: 64 8
      ADSL2 framing
      MSGc: 114 68
      B: 238 23
      M: 1 8
      T: 1 1
      R: 16 16
      S: 0.5350 7.7037
      L: 3813 216
      D: 64 8
      Counters
      SF: 4242284 4242282
      SFErr: 1383 1
      RS: 509074178 36059397
      RSCorr: 50991843 864080
      RSUnCorr: 23654 0

      HEC: 1393 0
      OCD: 0 0
      LCD: 0 0
      Total Cells: 2286021756 122707751
      Data Cells: 72227165 3276405
      Drop Cells: 0
      Bit Errors: 0 0

      ES: 31 1
      SES: 25 0
      UAS: 14 16
      Total time = 18 hours 55 min 11 sec
      SF = 4242284
      CRC = 1383
      LOS = 2
      LOF = 0
      ES = 31
      Latest 1 day time = 18 hours 55 min 11 sec
      SF = 4242284
      CRC = 1383
      LOS = 2
      LOF = 0
      ES = 31
      Latest 15 minutes time = 10 min 11 sec
      SF = 38060
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      Previous 15 minutes time = 15 min 0 sec
      SF = 56062
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      Previous 1 day time = 0 sec
      SF = 0
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      15 minutes interval [-30 min to -15 min] time = 15 min 0 sec
      SF = 56062
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
      SF = 56124
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
      SF = 56063
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0

    7. #16
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      Re: Download Speed Collapses

      If it isn't helping then no. You could log a fault call with BT reporting an intermitent noisey line. but don't mention Sky broadband as they wont want to know, hopefully they will then run some checks on the line and might find something. Also could try uping the noise margin with mognuts. Also could try switching mode to G.DMT from ADSL2+ with mognuts cos G.DMT tends to be more tolerant of errors but again it will reduce your speed.
      Last edited by Koala5; 29-08-07 at 06:22 PM.

    8. #17
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      Re: Download Speed Collapses

      ok
      Thanks.
      I'll run it through the full 24 hours, post the stats and reconnect the phone.
      When the error situation happened there was no disconnect. What would I expect to happen when these line errors occur?

    9. #18
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      Re: Download Speed Collapses

      Noise Margin dropped to 6.8 but router stayed connected. Back to 7.1 now.
      The errors came in one short period early afternoon.
      What value would you suggest I use to accommodate the variance in nm.

      These are the stats.

      usr/sbin/adslctl: ADSL driver and PHY status
      Status: Showtime Channel: FAST, Upstream rate = 764 Kbps, Downstream rate = 14235 Kbps
      Link Power State: L0
      Mode: ADSL2+
      Channel: Fast
      Trellis: ON
      Line Status: No Defect
      Training Status: Showtime
      Down Up
      SNR (dB): 7.0 12.0
      Attn(dB): 26.0 13.1
      Pwr(dBm): 1.3 12.4
      Max(Kbps): 14236 864
      Rate (Kbps): 14235 764
      G.dmt framing
      K: 239(0) 24
      R: 16 16
      S: 1 8
      D: 64 8
      ADSL2 framing
      MSGc: 114 68
      B: 238 23
      M: 1 8
      T: 1 1
      R: 16 16
      S: 0.5350 7.7037
      L: 3813 216
      D: 64 8
      Counters
      SF: 5240751 5240749
      SFErr: 1387 1
      RS: 628890208 44546366
      RSCorr: 120344192 852052
      RSUnCorr: 23748 0

      HEC: 1397 0
      OCD: 0 0
      LCD: 0 0
      Total Cells: 2824049487 151594400
      Data Cells: 73114656 3400021
      Drop Cells: 0
      Bit Errors: 0 0

      ES: 34 1
      SES: 25 0
      UAS: 14 16
      Total time = 23 hours 22 min 16 sec
      SF = 5240751
      CRC = 1387
      LOS = 2
      LOF = 0
      ES = 34
      Latest 1 day time = 23 hours 22 min 16 sec
      SF = 5240751
      CRC = 1387
      LOS = 2
      LOF = 0
      ES = 34
      Latest 15 minutes time = 7 min 16 sec
      SF = 27221
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      Previous 15 minutes time = 15 min 0 sec
      SF = 56062
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      Previous 1 day time = 0 sec
      SF = 0
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      15 minutes interval [-30 min to -15 min] time = 15 min 0 sec
      SF = 56062
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
      SF = 56125
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
      SF = 56062
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0

    10. #19
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      Re: Download Speed Collapses

      The errors will cause a reduction in speed or in servere cases a disconnection, but if they are only in short burst you may not notice. Take the noise margin up to 8 maybe 9 just experiment with it. The higher you go the slower your connection will be.

    11. #20
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      Re: Download Speed Collapses

      I have been monitoring the stats all day and there were no errors until very recently. Then I got a surge, just like yesterday. If the line was noisy then wouldn't the noise be more random and often?

      /usr/sbin/adslctl: ADSL driver and PHY status
      Status: Showtime Channel: FAST, Upstream rate = 764 Kbps, Downstream rate = 13338 Kbps
      Link Power State: L0
      Mode: ADSL2+
      Channel: Fast
      Trellis: ON
      Line Status: No Defect
      Training Status: Showtime
      Down Up
      SNR (dB): 9.8 12.5
      Attn(dB): 26.0 13.1
      Pwr(dBm): 1.3 12.4
      Max(Kbps): 13396 864
      Rate (Kbps): 13338 764
      G.dmt framing
      K: 241(0) 24
      R: 14 16
      S: 1 8
      D: 64 8
      ADSL2 framing
      MSGc: 106 68
      B: 240 23
      M: 1 8
      T: 1 1
      R: 14 16
      S: 0.5757 7.7037
      L: 3543 216
      D: 64 8
      Counters
      SF: 2423162 2423160
      SFErr: 11756 1
      RS: 271394234 20596860
      RSCorr: 8529511 36
      RSUnCorr: 133195 0

      HEC: 11805 0
      OCD: 0 0
      LCD: 0 0
      Total Cells: 1228821066 70413798
      Data Cells: 1848806 335412
      Drop Cells: 393
      Bit Errors: 0 0

      ES: 195 1
      SES: 191 0
      UAS: 30 15
      Total time = 10 hours 56 min 8 sec
      SF = 2439202
      CRC = 11756
      LOS = 0
      LOF = 0
      ES = 195
      Latest 1 day time = 10 hours 56 min 8 sec
      SF = 2439202
      CRC = 11756
      LOS = 0
      LOF = 0
      ES = 195
      Latest 15 minutes time = 11 min 8 sec
      SF = 41426
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      Previous 15 minutes time = 15 min 0 sec
      SF = 55875
      CRC = 11140
      LOS = 0
      LOF = 0
      ES = 181
      Previous 1 day time = 0 sec
      SF = 0
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      15 minutes interval [-30 min to -15 min] time = 15 min 0 sec
      SF = 55813
      CRC = 305
      LOS = 0
      LOF = 0
      ES = 6
      15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
      SF = 55813
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
      SF = 55814
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0

     

     
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