Your forum username:
Do you already have an account?
Forgot your password?
  • Log in or Sign up


    Welcome to Sky User - The Unofficial Support Forum for everything Sky! - Proudly helping over 65k members.


    Advertisement

    Page 1 of 2 12 LastLast
    Results 1 to 10 of 17

    SNR getting lower.

    This is a discussion on SNR getting lower. within the Sky Broadband help forums, part of the Sky Broadband help and support category; Hi, I have had Sky broadband for over a year now, I am on the Max package and use a ...

    1. #1
      DeclanTM's Avatar
      DeclanTM is offline Sky User Member
      Exchange: WSARD
      Broadband ISP: Sky Broadband Unlimited
      Router: Netgear DG834PN
      Sky TV: Sky+ HD 1TB
      Join Date
      Dec 2007
      Location
      Stevenston
      Posts
      39
      Thanks
      0
      Thanked 0 Times in 0 Posts

      SNR getting lower.

      Hi,
      I have had Sky broadband for over a year now, I am on the Max package and use a Netgear DG834N router.

      Over the past few months I have noticed that the SNR is getting lower and lower while the line attenuation is staying the same, I used to be able to sync at around 4500-4800Kbps and have a SNR of about 12.0dB. Now however when I switch the router on I get maximum 3500Kbps with an SNR or 6.0dB. I have tried new filters, new cables and even a new router, all of which makes no difference, it's so annoying as it used to work fine, plus the SNR is that low that eventually it drops to something stupid like 2.0dB and the internet breaks which causes me to reboot the router for it to last like two hours before the whole thing repeats itself.

      My current router stats are:
      Code:
      adslctl: ADSL driver and PHY status
      Status: ShowtimeRetrain Reason: 0
      Channel: INTR, Upstream rate = 768 Kbps, Downstream rate = 3616 Kbps
      Link Power State: L0
      Mode:                   G.DMT
      Channel:                Interleave
      Trellis:                ON
      Line Status:            No Defect
      Training Status:        Showtime
                      Down            Up
      SNR (dB):       7.6             10.0
      Attn(dB):       55.0            31.5
      Pwr(dBm):       18.5            12.5
      Max(Kbps):      3904            960
      Rate (Kbps):    3616            768
                              G.dmt framing
      K:              114(0)          25
      R:              16              16
      S:              2               8
      D:              64              8
                              ADSL2 framing
      MSGc:           1               1
      B:              112             25
      M:              2               8
      T:              1               1
      R:              16              16
      S:              2.1415          8.6153
      L:              904             208
      D:              64              8
                              Counters
      SF:             7431            7373
      SFErr:          0               0
      RS:             252686          62670
      RSCorr:         133             0
      RSUnCorr:       0               0
      
      HEC:            0               0
      OCD:            0               0
      LCD:            0               0
      Total Cells:    1077932         0
      Data Cells:     29964           0
      Drop Cells:     0
      Bit Errors:     0               0
      
      ES:             0               0
      SES:            0               0
      UAS:            87              0
      AS:             127
      
      INP:            4.53            2.46
      PER:            1.87            1.88
      delay:          34.26           17.23
      OR:             29.88           29.71
      
      Bitswap:        0               0
      
      Total time = 20 min 41 sec
      SF  = 64825
      CRC = 0
      LOS = 0
      LOF = 0
      ES  = 0
      Latest 1 day time = 20 min 41 sec
      SF  = 64825
      CRC = 0
      LOS = 0
      LOF = 0
      ES  = 0
      Latest 15 minutes time = 5 min 41 sec
      SF  = 18936
      CRC = 0
      LOS = 0
      LOF = 0
      ES  = 0
      Previous 15 minutes time = 15 min 0 sec
      SF  = 45889
      CRC = 0
      LOS = 0
      LOF = 0
      ES  = 0
      Previous 1 day time = 0 sec
      SF  = 0
      CRC = 0
      LOS = 0
      LOF = 0
      ES  = 0
      Showtime Drop Reason:   0
      Last Retrain Reason:    0
      # 
      #
      Sky+ HD, Sky Broadband Max LLU, Netgear DG834PN


    2. Advertisement
    3. #2
      ricopico's Avatar
      ricopico is offline Sky User Member
      Exchange: Wolverton
      Broadband ISP: Sky Fibre Unlimited
      Router: TL-WR1043ND (Open-WRT)
      Sky TV: Sky+HD box
      Join Date
      Jan 2007
      Location
      Milton Keynes
      Posts
      78
      Thanks
      2
      Thanked 0 Times in 0 Posts

      Re: SNR getting lower.

      Based apon your line attenuation you should be able to peak at more than 3.6 megs, but it does depend on the quality of your line. You do not apear to be heavily capped.

      Considering you have already changed filters, I would next look at the line itself.

      ie - the test socket would be a perfect test, taking out all extentions etc.

      Also, what is the actual line like? Any strange noises when using the phone?

    4. #3
      DeclanTM's Avatar
      DeclanTM is offline Sky User Member
      Exchange: WSARD
      Broadband ISP: Sky Broadband Unlimited
      Router: Netgear DG834PN
      Sky TV: Sky+ HD 1TB
      Join Date
      Dec 2007
      Location
      Stevenston
      Posts
      39
      Thanks
      0
      Thanked 0 Times in 0 Posts

      Re: SNR getting lower.

      The router stats above are with the router plugged into the test socket.

      There is slight noise on the line but I wouldn't say it was worse than before.

      It now appears that Sky have capped me at 3.6Mbps as no matter how many times I reboot, the router always syncs at that.
      Sky+ HD, Sky Broadband Max LLU, Netgear DG834PN

    5. #4
      PaulSky's Avatar
      PaulSky is offline Sky User Member
      Exchange:
      Broadband ISP: Max
      Router: Netgear V1 DG834GT
      Sky TV: Sky Basic
      Join Date
      Sep 2007
      Location
      Essex
      Posts
      4,202
      Thanks
      0
      Thanked 16 Times in 16 Posts

      Re: SNR getting lower.

      Just because you don't think the noise is any worse it doesn't mean that something hasn't gone wrong. If you have any noise on the line its not a good thing, we really need more than 20 mins of uptime on the stats though.

    6. #5
      DeclanTM's Avatar
      DeclanTM is offline Sky User Member
      Exchange: WSARD
      Broadband ISP: Sky Broadband Unlimited
      Router: Netgear DG834PN
      Sky TV: Sky+ HD 1TB
      Join Date
      Dec 2007
      Location
      Stevenston
      Posts
      39
      Thanks
      0
      Thanked 0 Times in 0 Posts

      Re: SNR getting lower.

      Hi PaulSky,

      Thanks for the advice, whom would I log the line noise fault with, BT or Sky. My phone and broadband are both with Sky so something is telling me that they will be responsable for it. As for the router stats, I have now switched back to the Sky router (Sagem F@AST) and as far as I know stats are not available for this, however tomorrow I will plugin the Netgear and run it for the whole day and post the stats at night.

      Unfortunately the sync speed has fallen again to 3.3Mbps now, it seems to be getting lower and lower every day and the SNR is getting smaller, it's still sitting at 6.0dB at 3.3Mbps. However the line attenuation is still not changed.

      Cheers,
      Declan
      Sky+ HD, Sky Broadband Max LLU, Netgear DG834PN

    7. #6
      PaulSky's Avatar
      PaulSky is offline Sky User Member
      Exchange:
      Broadband ISP: Max
      Router: Netgear V1 DG834GT
      Sky TV: Sky Basic
      Join Date
      Sep 2007
      Location
      Essex
      Posts
      4,202
      Thanks
      0
      Thanked 16 Times in 16 Posts

      Re: SNR getting lower.

      Who do you pay line rental to? If it's BT then you contact BT, tell them you have intermittant noise on the line and do not mention ADSL. You must however check its nothing you have on the line causing the noise, remove all but a phone that you know works perfectly and see if the noise is there. If the noise is only there when the router is on the line then it needs to go to Sky tech support.

    8. #7
      DeclanTM's Avatar
      DeclanTM is offline Sky User Member
      Exchange: WSARD
      Broadband ISP: Sky Broadband Unlimited
      Router: Netgear DG834PN
      Sky TV: Sky+ HD 1TB
      Join Date
      Dec 2007
      Location
      Stevenston
      Posts
      39
      Thanks
      0
      Thanked 0 Times in 0 Posts

      Re: SNR getting lower.

      Hi,

      Sorry about the delay, have been mega busy with school but got round to phoning Sky today and they said that BT were responsable so phoned them and was told that the line test found nothing wrong and the next step would be an engineer visit but if anything of mines was found to be the problem the cost would be 116 callout fee plus 99 a hour for any repairs, I turned that down at the slight chance of such a large bill.

      Here is the router status again with more uptime:

      Code:
      adslctl: ADSL driver and PHY status
      Status: Showtime  Channel: INTR, Upstream rate = 768 Kbps, Downstream rate = 3776 Kbps
      Link Power State: L0
      Mode:                   G.DMT
      Channel:                Interleave
      Trellis:                ON
      Line Status:            No Defect
      Training Status:        Showtime
                      Down            Up
      SNR (dB):       13.1            8.0
      Attn(dB):       55.0            31.5
      Pwr(dBm):       18.6            12.5
      Max(Kbps):      4064            896
      Rate (Kbps):    3776            768
                              G.dmt framing
      K:              119(0)          25
      R:              16              16
      S:              2               8
      D:              64              8
                              ADSL2 framing
      MSGc:           1               1
      B:              136             25
      M:              1               8
      T:              1               1
      R:              16              16
      S:              1.1167          8.6153
      L:              1096            208
      D:              64              8
                              Counters
      SF:             4710924         4710922
      SFErr:          1871            7188
      RS:             160171430               40042837
      RSCorr:         10205870                27064
      RSUnCorr:       5117            0
      
      HEC:            1475            4926
      OCD:            0               2394
      LCD:            0               132
      Total Cells:    713219120               0
      Data Cells:     60737128                0
      Drop Cells:     0
      Bit Errors:     0               0
      
      ES:             22072           0
      SES:            21564           0
      UAS:            69              0
      Total time = 1 days 8 hours 42 min 27 sec
      SF  = 6920238
      CRC = 2027836
      LOS = 1555033
      LOF = 0
      ES  = 22072
      Latest 1 day time = 8 hours 42 min 27 sec
      SF  = 1843920
      CRC = 35
      LOS = 139
      LOF = 0
      ES  = 107
      Latest 15 minutes time = 12 min 27 sec
      SF  = 43932
      CRC = 0
      LOS = 3
      LOF = 0
      ES  = 2
      Previous 15 minutes time = 15 min 0 sec
      SF  = 52931
      CRC = 0
      LOS = 1
      LOF = 0
      ES  = 1
      Previous 1 day time = 24 hours 0 sec
      SF  = 5076318
      CRC = 2027801
      LOS = 1554894
      LOF = 0
      ES  = 21965
      15 minutes interval [-30 min to -15 min] time = 15 min 0 sec
      SF  = 52989
      CRC = 0
      LOS = 7
      LOF = 0
      ES  = 6
      15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
      SF  = 52931
      CRC = 3
      LOS = 7
      LOF = 0
      ES  = 5
      15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
      SF  = 52930
      CRC = 2
      LOS = 13
      LOF = 0
      ES  = 10
      # 
      #
      Thanks for all the help so far, wanting this sorted as soon as,
      Declan
      Sky+ HD, Sky Broadband Max LLU, Netgear DG834PN

    9. #8
      Andy17's Avatar
      Andy17 is offline Sky User Member
      Exchange: Woodhouse (SLWD)
      Broadband ISP: Sky Fiber Max
      Router: Sky Q Hub
      Sky TV: Sky+ HD
      Join Date
      Oct 2007
      Posts
      1,370
      Thanks
      0
      Thanked 0 Times in 0 Posts

      Re: SNR getting lower.

      Previous 1 day time = 24 hours 0 sec
      SF = 5076318
      CRC = 2027801
      LOS = 1554894
      LOF = 0
      ES = 21965

      Looking at this section of your stats i would have to say you have a line problem CRC's are to high. I would say the noise you said you can hear on the phone has something to do with it. Do you notice when on the phone the broadband connection drops.

    10. #9
      DeclanTM's Avatar
      DeclanTM is offline Sky User Member
      Exchange: WSARD
      Broadband ISP: Sky Broadband Unlimited
      Router: Netgear DG834PN
      Sky TV: Sky+ HD 1TB
      Join Date
      Dec 2007
      Location
      Stevenston
      Posts
      39
      Thanks
      0
      Thanked 0 Times in 0 Posts

      Re: SNR getting lower.

      When the phone is picked up the SNR goes up to around 12.1dB, when the phone is hung up again more or less straight away the SNR goes back down to 8.2dB.
      Sky+ HD, Sky Broadband Max LLU, Netgear DG834PN

    11. #10
      Brian69's Avatar
      Brian69 is offline Sky User Member
      Exchange: Kings Lynn
      Broadband ISP: Sky Unlimited
      Router: Non Sky Router
      Sky TV: Sky+ HD
      Join Date
      Feb 2008
      Posts
      2,971
      Thanks
      0
      Thanked 6 Times in 5 Posts

      Re: SNR getting lower.

      If you can hear noise on the phone when it is pluged into the test socket, then report this to Sky, as you pay your line rental to them, the SNR changes which you have noticed when you lift the phone receiver are typical of a poor joint somewhere. Dont worry too much about broadband, report this as a problem with the phone (noise on the line), when that is repaired, your BB will be fine, and you will be able to get the cap lifted.

     

     
    Page 1 of 2 12 LastLast

    Tags for this Thread

    Posting Permissions

    • You may not post new threads
    • You may not post replies
    • You may not post attachments
    • You may not edit your posts
    •  
    SkyUser - Copyright © 2006-2017. SatDish and NewsreadeR | SkyUser is in no way affiliated with Sky Broadband / BSkyB
    RIPA NOTICE: NO CONSENT IS GIVEN FOR INTERCEPTION OF PAGE TRANSMISSION