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    Are these error stats OK?

    This is a discussion on Are these error stats OK? within the Sky Broadband help forums, part of the Sky Broadband help and support category; I've been slightly tweaking my noise margin for months now using my Billion 7800N. With the SNR down to 4.5-4.8dB ...

    1. #1
      timc's Avatar
      timc is offline Sky User Member
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      Are these error stats OK?

      I've been slightly tweaking my noise margin for months now using my Billion 7800N.

      With the SNR down to 4.5-4.8dB I get 16,700 kbps with an attenuation of 30dB. There have been no resyncs for 45+days at this setting.

      Today I had to power off the upstairs of my house & when everything restarted my SNR was 5.9dB so I thought I'd try a bit more of a tweak.

      Now I'm at 2.8/3.0dB & 18013kbps.

      These are my error stats having downloaded 6.4gig over the past almost 4hours.

      Code:
      adsl: ADSL driver and PHY status
      Status: Showtime
      Retrain Reason: 8000
      Max:    Upstream rate = 1161 Kbps, Downstream rate = 21100 Kbps
      Path:   0, Upstream rate = 1153 Kbps, Downstream rate = 18013 Kbps
      
      Link Power State:       L0
      Mode:                   ADSL2+
      TPS-TC:                 ATM Mode
      Trellis:                U:ON /D:ON
      Line Status:            No Defect
      Training Status:        Showtime
                      Down            Up
      SNR (dB):        2.8             8.6
      Attn(dB):        30.0            18.0
      Pwr(dBm):        18.5            12.3
                              ADSL2 framing
      MSGc:           77              13
      B:              108             17
      M:              1               8
      T:              4               7
      R:              8               12
      S:              0.1931          3.9619
      L:              4845            315
      D:              160             8
                              Counters
      SF:             878228          855236
      SFErr:          37              27
      RS:             291571934               1323170
      RSCorr:         1821127         590
      RSUnCorr:       440             0
      
      HEC:            26              36
      OCD:            0               0
      LCD:            0               0
      Total Cells:    598259037               38312391
      Data Cells:     163055744               11550450
      Drop Cells:     0
      Bit Errors:     0               5004
      
      ES:             31              17
      SES:            0               0
      UAS:            71              71
      AS:             14083
      
      INP:            1.05            1.21
      PER:            16.03           16.46
      delay:          7.72            7.92
      OR:             41.41           9.23
      
      Bitswap:        1129            12
      
      Total time = 4 hours 5 min 35 sec
      FEC:            1822597         590
      CRC:            37              27
      ES:             31              17
      SES:            0               0
      UAS:            71              71
      LOS:            0               0
      LOF:            0               0
      Latest 15 minutes time = 5 min 35 sec
      FEC:            171426          0
      CRC:            4               0
      ES:             3               0
      SES:            0               0
      UAS:            0               0
      LOS:            0               0
      LOF:            0               0
      Previous 15 minutes time = 15 min 0 sec
      FEC:            459660          0
      CRC:            3               0
      ES:             2               0
      SES:            0               0
      UAS:            0               0
      LOS:            0               0
      LOF:            0               0
      Latest 1 day time = 4 hours 5 min 35 sec
      FEC:            1822597         590
      CRC:            37              27
      ES:             31              17
      SES:            0               0
      UAS:            71              71
      LOS:            0               0
      LOF:            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
      Since Link time = 3 hours 54 min 41 sec
      FEC:            1821127         590
      CRC:            37              27
      ES:             31              17
      SES:            0               0
      UAS:            0               0
      LOS:            0               0
      LOF:            0               0
      I think these are OK but I'd welcome comments from those of you who know more about these things.

      Obviously stability is important & only over the next few days will that become clear.


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    3. #2
      User05's Avatar
      User05 is offline Sky User Member
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      Re: Are these error stats OK?

      Code:
      Total time = 4 hours 5 min 35 sec
      
      FEC:            1822597         590
      HEC:            26              36
      CRC:            37              27
      Looks alright to me, but I suppose time will tell whether it'll stay stable. Just set it back to 5dB or thereabouts if you start seeing issues or drop outs.

     

     

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