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    Origin shows what speeds VDSL2 can achieve

    This is a discussion on Origin shows what speeds VDSL2 can achieve within the Sky Broadband (Fibre) Help forums, part of the Sky Broadband help and support category; [QUOTE=Scubbie;365427]Following the various pages on the web (many of whom have had links posted on the forum) I would suggest ...

    1. #11
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      Re: Origin shows what speeds VDSL2 can achieve

      [QUOTE=Scubbie;365427]Following the various pages on the web (many of whom have had links posted on the forum) I would suggest that you have a personal connection from your home, to the cabinet and on to the exchange. From there it will be joined to Sky's LLU equipment via a 1Gbit Ethernet connection. It will be at this point that you would expect traffic problems, if any, to come in to play.


      Scubbie, Does a Sky Fibre connection not need to compete with all the other fibre traffic in the fibre cabinet via the iSLAM or DSLAM whatever its called ?


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    3. #12
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      Re: Origin shows what speeds VDSL2 can achieve

      thinkbroadband :: Fibre Broadband (FTTC / FTTH) Guide
      How does FTTC broadband work?
      Fibre-to-the-Cabinet broadband uses fibre optic cable from the local telephone exchange to connect to the nearest street side cabinet which serves your property. This is normally within a few hundred metres of your property. BT Openreach will usually install a new cabinet adjacent to or near the existing 'green cabinet' which serves your phone line connects to. The new cabinet will house a VDSL2 capable DSLAM (a mini-version of what currently provides your ADSL broadband service) to which your phone line will be connected. As the cabinet is close to your property and also uses newer VDSL2 technology, the speed of your broadband is usually much higher.
      Your connection is then sent over the Fibre to the telephone exchange. From there it is routed to Sky's equipment, where your Internet connection will join Sky's backhaul.

      Any traffic management is handled at the server end and the other end of the backhaul.

      Edit: A useful pic to show the basics:

      Origin shows what speeds VDSL2 can achieve-fttc_diagram.jpg

      Fibre to the Cabinet - FTTC - Powernet
      Last edited by Scubbie; 08-04-12 at 07:31 PM.

      Sky Fibre Unlimited Pro: Connected at 80,000 kbps / 20,000 kbps
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      Speedtest: 17.15MB/s 0.97Mb/s Ping 31 ms

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      Re: Origin shows what speeds VDSL2 can achieve

      Quote Originally Posted by Scubbie View Post
      thinkbroadband :: Fibre Broadband (FTTC / FTTH) Guide


      Your connection is then sent over the Fibre to the telephone exchange. From there it is routed to Sky's equipment, where your Internet connection will join Sky's backhaul.

      Any traffic management is handled at the server end and the other end of the backhaul.

      Edit: A useful pic to show the basics:

      Click image for larger version. 

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      Fibre to the Cabinet - FTTC - Powernet
      I totally understood the basics i.e. the diagram but I assumed that there was some contention at the fibre cabinet because there is a dslam in there. By the sounds of it I am talking sh**.


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      Re: Origin shows what speeds VDSL2 can achieve

      Did anyone actually read the speeds
      they are all messed up both downstream and upstream

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      Re: Origin shows what speeds VDSL2 can achieve

      Some of them were a bit weird. My lines fastest speeds according to the BTO engineer was 47 down and 18 up so some of Origins speeds seemed right but some looked strange.


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    7. #16
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      Re: Origin shows what speeds VDSL2 can achieve

      Quote Originally Posted by paulkerdot View Post
      I totally understood the basics i.e. the diagram but I assumed that there was some contention at the fibre cabinet because there is a dslam in there.
      The issue with the cabinets is more to do with spare physical capacity to plug in any new customers, not with competing over bandwidth.

      So if BTW decide to throttle their customers, it has no effect on Sky Fibre customers.

      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

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      Re: Origin shows what speeds VDSL2 can achieve

      Quote Originally Posted by Scubbie View Post
      The issue with the cabinets is more to do with spare physical capacity to plug in any new customers, not with competing over bandwidth.

      So if BTW decide to throttle their customers, it has no effect on Sky Fibre customers.
      Thanks Scubbie. Good to know the choice to wait it out and stay with Sky was a great decision. I can now sleep at night.


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      Re: Origin shows what speeds VDSL2 can achieve

      Quote Originally Posted by Shonk View Post
      Did anyone actually read the speeds
      they are all messed up both downstream and upstream
      I agree, don't know how much to believe this. To get a more acuarte idea you would need to find out your max achievable sync speed then use a TDR to get the actual length of the copper from your house to the street cab and put the 2 together. This would however need a lot of people to do this to build up a bigger picture.
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      Re: Origin shows what speeds VDSL2 can achieve

      I think you'll find this is the reason:

      Think of broadband as a 50 lane motorway. If all is well, then you would have say 40 lanes heading towards the party, and 10 lanes heading away.

      If there is damage to a part of the road or an accident blocking a lane (i.e. too much noise on the line) to sustain a clear path to the party, then perhaps one of the lanes leaving it can be reversed. If the 9 lanes can't cope, then perhaps two or three lanes heading to the party can be changed to traffic leaving the party.

      I hope this makes a little sense.

      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

    11. #20
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      Re: Origin shows what speeds VDSL2 can achieve

      Hi,

      The speeds are 100% accurate and real customer data. The reason for the variation is purely the line quality you are seeing, and what affect it has on VDSL.

      Kind Regards,
      Origin
      Last edited by NewsreadeR; 09-04-12 at 02:08 PM.

     

     
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