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    Syncing at 7296mbps but downloading at....

    This is a discussion on Syncing at 7296mbps but downloading at.... within the Sky Broadband help forums, part of the Sky Broadband help and support category; My sky router is pretty stable and can stay connected for weeks at a time without any resyncs. At the ...

    1. #1
      nickgrant's Avatar
      nickgrant is offline Sky User Member
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      Syncing at 7296mbps but downloading at....

      My sky router is pretty stable and can stay connected for weeks at a time without any resyncs. At the moment i'm connected at 7296mbps but the fastest I can download is between 6300-6600mbps (780 KB/sec on average).

      I'm connected via cat5e cable, i'm just wondering if it's normal for my line not to use the full bandwidth.

      Thanks.


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    3. #2
      Shonk's Avatar
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      Re: Syncing at 7296mbps but downloading at....

      yes
      atm overheads are huge on adsl
      im synced at the max 20479
      and get 17.69 mbit

    4. #3
      buddbuttocks's Avatar
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      Re: Syncing at 7296mbps but downloading at....

      Quote Originally Posted by Shonk View Post
      yes
      atm overheads are huge on adsl
      im synced at the max 20479
      and get 17.69 mbit
      Your line is probably also using some level of INP, at the cost of some bandwidth.

    5. #4
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      Re: Syncing at 7296mbps but downloading at....

      Quote Originally Posted by nickgrant View Post
      My sky router is pretty stable and can stay connected for weeks at a time without any resyncs. At the moment i'm connected at 7296mbps but the fastest I can download is between 6300-6600mbps (780 KB/sec on average).

      I'm connected via cat5e cable, i'm just wondering if it's normal for my line not to use the full bandwidth.

      Thanks.
      You are unfortunately falling into the trap of getting confused by different letters which essentially mean the same thing.

      For example kbps is not the same as KB/sec

      780 KB/sec is the same as what you are getting and would be quoted from somewhere such as a torrent program.

      Torrents are notoriously upsetting for some people as they always expect to get the peak performance. The truth is that you are also limited by the maximum that someone is uploading to your connection. If I'm lucky, I might occasionaly get a download at 1.6 or 1.7Mb/sec, but more often it is not this good.

      Sky Fibre Unlimited Pro: Connected at 80,000 kbps / 20,000 kbps
      Previous ADSL2+ Speed 19999 kbps 1153 kbps, Line Attenuation 17.5 db 6.9 db, Noise Margin 7.5 dB 8.7 dB
      Speedtest: 17.15MB/s 0.97Mb/s Ping 31 ms

    6. #5
      Shonk's Avatar
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      Re: Syncing at 7296mbps but downloading at....

      Im not really sure how impulse noise protection works
      but here's my settings

      INPup = 1.68
      INPdown = 0.62
      BisADsInp = MinPossible

      if you read up on adsl overheads
      im getting the max true dl rate for the sync speed

      Quote Originally Posted by buddbuttocks View Post
      Your line is probably also using some level of INP, at the cost of some bandwidth.

    7. #6
      I_Hate_Sky_Awnsers's Avatar
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      Re: Syncing at 7296mbps but downloading at....

      Coped from think broadband.

      Googling around I found "A significant portion of the end-to-end delay in high-rate DSL systems is due to the impulse noise protection scheme employed in order to shield those systems against random, non-stationary noise bursts of high energy that appear on the copper lines. Systems are protected from impulse noise using a combination of interleaving and Reed-Solomon codes. In order to lower the end-to-end delay without reducing the data rate that is available to the user, one needs to decrease the interleaver depth. This paper presents a way to achieve this reduction without compromising neither the robustness to noise bursts nor the data rate of the system. The proposed algorithm relies on the inner code used by many DSL systems and uses the metric provided by the inner code decoder at the receiver."

      Essentially you loose sync speed but gain stability.
      Links Router Stats Useful Tutorials Speed Test Check For Test Socket Repetitive Electrical Impulse Noise

      Results from http://www.speed.io (Copied on 2011-04-08 16:36:58)
      Download: 50000 Kbit/s Upload : 4361 kbit/s Connects : 2446 conn/min Ping: 21 ms

    8. The Following User Says Thank You to I_Hate_Sky_Awnsers For This Useful Post:

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    9. #7
      I_Hate_Sky_Awnsers's Avatar
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      Re: Syncing at 7296mbps but downloading at....

      If you are SVBN then only some profiles can be set with 0 INP - see This for which ones.

      If you have your line rental with anyone other than sky then any line can be set to 0 INP
      Links Router Stats Useful Tutorials Speed Test Check For Test Socket Repetitive Electrical Impulse Noise

      Results from http://www.speed.io (Copied on 2011-04-08 16:36:58)
      Download: 50000 Kbit/s Upload : 4361 kbit/s Connects : 2446 conn/min Ping: 21 ms

     

     

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