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    Speed Advice

    This is a discussion on Speed Advice within the Speed tests and how to get better results forums, part of the Sky Broadband help and support category; Hi all I got sky max package 2 months ago and have had nothing but trouble! I have read through ...

    1. #1
      isohunter's Avatar
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      Slow Speeds (First post) Help

      Hi all

      I got sky max package 2 months ago and have had nothing but trouble!

      I have read through Sat's very interesting posts but being a bit of a newb simpleton have not understood exactly about the signif between line attenuation
      and speeds etc and am in desperate need of some advice

      If the connection stayed at the top end I would not have a problem but on a daily basis i check the stats and find the dl speeds drop to 700kbps or even lower. I then have to restart the router many times in order to get the connected speed back to something good.

      This can't be correct, poss Capped? noise margin seem low?

      I am on the verge of changing IPS even though i will still have to pay as this is the worst service i have ever had!

      I am 2.48 kilometres from my exchange (as the crow flies)

      My stats look like this

      ADSL Link Downstream Upstream
      Connection Speed 4288 kbps 768 kbps
      Line Attenuation 47 db 15 db
      Noise Margin 3 db 9 db

      Hope this is enough info for you

      ISOhunter


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    3. #2
      isohunter's Avatar
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      Speed Advice

      Hi,

      I have read Sat's post of connection speed and line attenuation but being a newb not quite understood it fully

      Could someone let me know if these details look right and if they think i could increase my speed?

      thanks

      ADSL Link Downstream Upstream
      Connection Speed 4992 kbps 768 kbps
      Line Attenuation 50.0 db 31.5 db
      Noise Margin 10.6 db 10.0 db

      ISOhunter

    4. #3
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      Re: Speed Advice


    5. #4
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      Re: Slow Speeds (First post) Help

      Quote Originally Posted by isohunter View Post
      I got sky max package 2 months ago and have had nothing but trouble!

      noise margin seem low?

      My stats look like this

      ADSL Link Downstream Upstream
      Noise Margin 3 db 9 db
      Yes. Anything under 6db downstream is going to give a sluggish response and under 5db you're close to a disconnection. 3db is terrible.

      It is entirely normal for the noise margin to change through the day, repeating the same cycle day after day. You need to "lock" your router's noise margin at a high enough figure so that when the noise margin drops it doesn't go below about 7db. The first sticky in my signature has details of two methods to do this. The Mognuts method is easiest.

      I'd also suggest you look at the cabling and faceplate help forum as I suspect you have a line issue as your sync speed is rather low for your attenuation. A poor line will also cause your noise margin to have a larger swing which is probably contributing to your problem.



      EDIT: I've just seen your other thread which I've merged with this one (please just start one thread per topic).

      Those stats confirm you have a serious line problem. In the first your attenuation is 47db in the second it is 50db. This shouldn't be changing like this. Also, in the first your noise margin was a healthy 10.6db but you were syncing at a higher speed than with a noise margin of 3db before. Your noise margin must be going up and down like a yo-yo.
      Last edited by Saturday; 08-07-07 at 04:49 PM.

    6. #5
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      Re: Speed Advice

      Hi,

      Thanks for merging did not think the first post went in correctly!

      I have now moved the router and plugged it directly into the master socket and run a cat5e cable back to my pc

      There is a huge improvement

      Do the new stats look reasonable?

      cheers


      ADSL Link Downstream Upstream
      Connection Speed 6368 kbps 768 kbps
      Line Attenuation 50.0 db 31.5 db
      Noise Margin 7.5 db 10.0 db

      (powered up for 5 min)



      /usr/sbin/adslctl: ADSL driver and PHY status
      Status: Showtime Channel: INTR, Upstream rate = 768 Kbps, Downstream rate = 6432 Kbps
      Link Power State: L0
      Mode: G.DMT
      Channel: Interleave
      Trellis: ON
      Line Status: No Defect
      Training Status: Showtime
      Down Up
      SNR (dB): 6.6 10.0
      Attn(dB): 15.5 31.5
      Pwr(dBm): 19.8 12.5
      Max(Kbps): 7040 960
      Rate (Kbps): 6432 768
      G.dmt framing
      K: 202(0) 25
      R: 16 16
      S: 1 8
      D: 64 8
      ADSL2 framing
      MSGc: 1 1
      B: 202 25
      M: 1 8
      T: 1 1
      R: 16 16
      S: 1.0788 8.6153
      L: 1624 208
      D: 64 8
      Counters
      SF: 14995 14993
      SFErr: 189 0
      RS: 1019728 127440
      RSCorr: 27012 4
      RSUnCorr: 9801 0

      HEC: 110 0
      OCD: 16 0
      LCD: 0 0
      Total Cells: 3844060 0
      Data Cells: 7256 0
      Drop Cells: 0
      Bit Errors: 0 0

      ES: 18 0
      SES: 16 0
      UAS: 38 0
      Total time = 5 min 13 sec
      SF = 14995
      CRC = 189
      LOS = 168
      LOF = 0
      ES = 18
      Latest 1 day time = 5 min 13 sec
      SF = 14995
      CRC = 189
      LOS = 168
      LOF = 0
      ES = 18
      Latest 15 minutes time = 5 min 13 sec
      SF = 14995
      CRC = 189
      LOS = 168
      LOF = 0
      ES = 18
      Previous 15 minutes time = 0 sec
      SF = 0
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      Previous 1 day time = 0 sec
      SF = 0
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0

      thanks for all the help so far

      ISOhunter

    7. #6
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      Re: Speed Advice

      Quote Originally Posted by isohunter View Post

      Do the new stats look reasonable?
      Hard to say as the router wasn't run long or hard enough to pass much traffic. Even so there's quite a high error level showing.

      However, you are now syncing at a very good rate for your attenuation.

    8. #7
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      Re: Speed Advice

      Hey, thanks for the help

      I left it on for about 2 hrs and took the stats (below)

      I am really worried becuase even though the connection speed is much better and speed tests have been much better the stability of the connection is awful. Up and down like a yo yo

      sits around noise margin of 7 for ages then start dropping off to even below 4

      hope you can give me some advice from the stats

      thanks again you stars!

      /usr/sbin/adslctl: ADSL driver and PHY status
      Status: Showtime Channel: INTR, Upstream rate = 768 Kbps, Downstream rate = 6144 Kbps
      Link Power State: L0
      Mode: G.DMT
      Channel: Interleave
      Trellis: ON
      Line Status: No Defect
      Training Status: Showtime
      Down Up
      SNR (dB): 4.3 10.0
      Attn(dB): 50.0 31.5
      Pwr(dBm): 19.7 12.5
      Max(Kbps): 6752 960
      Rate (Kbps): 6144 768
      G.dmt framing
      K: 193(0) 25
      R: 16 16
      S: 1 8
      D: 64 8
      ADSL2 framing
      MSGc: 1 1
      B: 193 25
      M: 1 8
      T: 1 1
      R: 16 16
      S: 1.0824 8.6153
      L: 1552 208
      D: 64 8
      Counters
      SF: 394213 394211
      SFErr: 75510 6
      RS: 26806494 3350793
      RSCorr: 9733436 34
      RSUnCorr: 1463026 0

      HEC: 72793 4
      OCD: 713 2
      LCD: 0 0
      Total Cells: 95106177 0
      Data Cells: 14282254 0
      Drop Cells: 0
      Bit Errors: 0 0

      ES: 2049 0
      SES: 1473 0
      UAS: 23 0
      Total time = 1 hours 52 min 15 sec
      SF = 394213
      CRC = 75510
      LOS = 9
      LOF = 0
      ES = 2049
      Latest 1 day time = 1 hours 52 min 15 sec
      SF = 394213
      CRC = 75510
      LOS = 9
      LOF = 0
      ES = 2049
      Latest 15 minutes time = 7 min 15 sec
      SF = 25642
      CRC = 12681
      LOS = 0
      LOF = 0
      ES = 375
      Previous 15 minutes time = 15 min 0 sec
      SF = 52872
      CRC = 37258
      LOS = 1
      LOF = 0
      ES = 694
      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 = 52989
      CRC = 18236
      LOS = 2
      LOF = 0
      ES = 576
      15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
      SF = 52931
      CRC = 7318
      LOS = 4
      LOF = 0
      ES = 393
      15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
      SF = 52930
      CRC = 5
      LOS = 2
      LOF = 0
      ES = 4

    9. #8
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      Re: Speed Advice

      Your stats taken with your router plugged into the test socket do suggest that you have a wiring issue as you were able to get a better synch speed. You said you plugged your router into the master socket. However have you tried the test socket (the one accessed by unscrewing the lower half of the faceplate on your master socket)? If not try that, as there may still be some noise problems associated with extension wiring (using the test socket effectively disconnects all your extension wiring). Try running for a couple of hours and then post your stats again.

      If you have already done that, then I suggest you use the Mognuts utility to set your target noise margin to something higher than the 7 dB default value (I suggest starting with 14 dB - you may be able to reduce it subsequently) this will give you a lower synch speed, but should improve your conection stability).
      Last edited by Steve case; 10-07-07 at 07:10 AM.
      Useful Links
      Download RouterStats (useful utility for continuously recording noise margin)

    10. #9
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      Re: Speed Advice

      Thanks will try that as soon as back from work today!



      will post some stats later

      cheers

      ISOhunter

    11. #10
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      Re: Speed Advice

      Hi ,

      I have had the router oin for ages now

      what do you think of the stats?

      cheers

      /usr/sbin/adslctl: ADSL driver and PHY status
      Status: Showtime Channel: INTR, Upstream rate = 768 Kbps, Downstream rate = 5504 Kbps
      Link Power State: L0
      Mode: G.DMT
      Channel: Interleave
      Trellis: ON
      Line Status: No Defect
      Training Status: Showtime
      Down Up
      SNR (dB): 8.1 9.0
      Attn(dB): 50.0 31.5
      Pwr(dBm): 19.6 12.5
      Max(Kbps): 6080 928
      Rate (Kbps): 5504 768
      G.dmt framing
      K: 173(0) 25
      R: 16 16
      S: 1 8
      D: 64 8
      ADSL2 framing
      MSGc: 1 1
      B: 173 25
      M: 1 8
      T: 1 1
      R: 16 16
      S: 1.0919 8.6153
      L: 1392 208
      D: 64 8
      Counters
      SF: 4746682 4746680
      SFErr: 137880 166
      RS: 322774432 40346780
      RSCorr: 102335628 1424
      RSUnCorr: 3645636 0

      HEC: 127554 116
      OCD: 2077 12
      LCD: 2 4
      Total Cells: 1042878846 0
      Data Cells: 179469525 0
      Drop Cells: 0
      Bit Errors: 0 0

      ES: 4120 0
      SES: 2360 0
      UAS: 27 0
      Total time = 22 hours 25 min 35 sec
      SF = 4746682
      CRC = 137880
      LOS = 16
      LOF = 0
      ES = 4120
      Latest 1 day time = 22 hours 25 min 35 sec
      SF = 4746682
      CRC = 137880
      LOS = 16
      LOF = 0
      ES = 4120
      Latest 15 minutes time = 10 min 35 sec
      SF = 37345
      CRC = 1
      LOS = 0
      LOF = 0
      ES = 1
      Previous 15 minutes time = 15 min 0 sec
      SF = 52931
      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 = 52930
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      15 minutes interval [-45 min to -30 min] time = 15 min 0 sec
      SF = 52930
      CRC = 0
      LOS = 0
      LOF = 0
      ES = 0
      15 minutes interval [-60 min to -45 min] time = 15 min 0 sec
      SF = 52990
      CRC = 0
      LOS = 2
      LOF = 0
      ES = 1

      ISOhunter

     

     
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