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    Where does the problem lie?

    This is a discussion on Where does the problem lie? within the Cabling and faceplate help forums, part of the Sky Broadband help and support category; Hi, this relates to a previous thread that I started on the 'Speed tests and how to get better results' ...

    1. #1
      surflogic's Avatar
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      Where does the problem lie?

      Hi, this relates to a previous thread that I started on the 'Speed tests and how to get better results' page entitled 'Line Attenuation and poor connection speeds'.

      From the previous thread I've learnt that it is most probably bad wiring in the house that is causing my synch speed to be lower than expected.

      ************************************************** ******

      Statistics when plugged into the master (TEST) socket:

      ADSL Link Downstream Upstream
      Connection Speed 5056 kbps 448 kbps
      Line Attenuation 51.0 db 28.0 db
      Noise Margin 5.9 db 23.0 db


      Statistics when plugged into the master (FACEPLATE) socket:

      ADSL Link Downstream Upstream
      Connection Speed 2432 kbps 448 kbps
      Line Attenuation 52.0 db 28.0 db
      Noise Margin 5.9 db 23.0 db

      ************************************************** ******

      As you can see from these stats, when plugged into the test socket behind the faceplate of the master socket my connection speed increases up to the expected 5250kbps.

      Given the fact that when I plug it into the master socket (i.e. the socket at the front of the faceplate) does this suggest that the dodgy wiring is within the master socket unit, and if so how can I go about diagnosing where the problem is?

      As this is on the master socket, where does BT's responsibility end (as in when does the line become mine). This is a new house still under warranty so if itís my responsibility I can easily get the builders back in.

      Thanks in advance!


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    3. #2
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      Re: Where does the problem lie?

      Any extensions on the line? If not it is probably the front plate failing and needs replacing but good luck getting BT to replace it, you could try calling them and tell them you get noise on the line when in the master socket but if you use the test socket all is well.
      You can buy them cheap enough yourself and as you can see they only unscrew. You could also purchase an ADSL pre-filtered faceplate which would do away with the need for filters being plugged into the socket at all.

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      Re: Where does the problem lie?

      As well as the master socket, I have one socket in the living room, two in an upstairs bedroom, one in another bedroom and also one under the stairs. The only one that I use is the one in the living room which has the micro-filter attached to it.

      I did the quiet line test by dialling 17070 (see BT Line Tests (quiet line/distance from exchange etc) - The Scream! ) from the master socket and I could here a muffled hissing sound, but then did a fault check with BT which came back negative.

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      Re: Where does the problem lie?

      BT fault checks only find big problems and rarely worry about noise, if the problem goes away using the test socket then something is wrong with the extension wiring, if you only need one of the extension sockets you may want to look to get the rest removed and see if that improves matters.

    6. #5
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      Re: Where does the problem lie?

      I take it you've followed the tutorials elsewhere on the site and disconnected the ringer wire from your extensions?

    7. #6
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      Re: Where does the problem lie?

      just replace the faceplate with an xte-2005 from ADSL Nation LTD - Quality ADSL Products UK - adslnation.com and jobs a goodun...
      -------------------------------------------



      Useful Sticky: - How To Obtain Your Router Stats, BT Speed Test, Check For Test Socket

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      Re: Where does the problem lie?

      Okay, I've removed the ring wire from both the master socket and also the socket in the living room (where the micro filter is plugged in) and I'm still getting a noise margin of around 5.6 db:

      ADSL Link Downstream Upstream
      Connection Speed 2432 kbps 448 kbps
      Line Attenuation 51.0 db 29.0 db
      Noise Margin 5.6 db 22.0 db

      So I assume the ring wire isn't the root cause. I could use a new face plate and split the signal at the master socket, but I have no power supply where the socket is so I can't really do this option (let me rephrase; I would do this using extn cables etc, but the wife is adamant that the router is not going by the front door and definitley no extn cables, so you see my dilemma!!).

      I think I will get the builders back in to have a look (house is new and under warrenty), as the problem is definitley within the internal wiring somewhere. Can you suggest any final tests I can perform to use as evidence that it is a problem with their wiring?

      Thanks all for your help on this, it appreciated!

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      Re: Where does the problem lie?

      Proving internal wiring faults without the sort of equipment BT carry with them is going to be hard, best bet is to show them the massive difference in speed stats between the master test socket (shielded from all extension wiring) and plugged into the standard master socket itself. This will highlight the issue is with the internal wiring but getting them to sort it is another matter.

    10. #9
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      Re: Where does the problem lie?

      you've proved the issue is with the master faceplate so just replace it...
      -------------------------------------------



      Useful Sticky: - How To Obtain Your Router Stats, BT Speed Test, Check For Test Socket

    11. #10
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      Re: Where does the problem lie?

      When you remove the faceplate from the master socket, i take it all your extensions are connected to the back of the faceplate? - as they should be(you will probably see a mass of wires?)

      which terminals are they all connected to?

      if all 6 wires are connected (including No3 - the ringer) you can disconnect all except no 2 & no5. Then see is there is still a huge difference between the test socket and the master socket - if the rest of the extensions are connected properly and behaving themselves! - you should hopefully see very little difference.

     

     
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