SDSL line checker says yes, ADSL says no

Discussion in 'Broadband' started by Iwan Davies, Jun 8, 2004.

  1. Iwan Davies

    Iwan Davies Guest

    According to the ADSL line checker, I live too far from the exchange to get
    broadband. After contacting BT I learned this is basically because of an
    ancient cable run that is due to be replaced this month. Today, I looked at
    the SDSL line checker for BT Business Broadband Advanced, and it reported my
    line as being fit for SDSL, subject to survey! Is there no limitation on
    distance with SDSL? Or is the SDSL line checker less precise than the ADSL
    one?

    Iwan
     
    Iwan Davies, Jun 8, 2004
    #1
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  2. Iwan Davies

    Mark Guest

    | According to the ADSL line checker, I live too far from the exchange to
    get
    | broadband. After contacting BT I learned this is basically because of an
    | ancient cable run that is due to be replaced this month. Today, I looked
    at
    | the SDSL line checker for BT Business Broadband Advanced, and it reported
    my
    | line as being fit for SDSL, subject to survey! Is there no limitation on
    | distance with SDSL? Or is the SDSL line checker less precise than the ADSL
    | one?
    |
    | Iwan
    |
    |
    |


    A dedicated line is installed for SDSL, so your poor quality existing line
    doesn't matter. SDSL is very much distance (or more accurately, line
    attenuation) dependent.
     
    Mark, Jun 8, 2004
    #2
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  3. Iwan Davies

    PeeGee Guest

    IIRC, SDSL has much shorter line capabilities than ADSL because it is
    symmetric! I had similar readings a while ago (NW Surrey), with
    "too long for adsl", "capable of 512k sdsl" and an engineering test of
    4.5Km - which would consistent if the adsl/sdsl data was transposed.
    PeeGee
     
    PeeGee, Jun 8, 2004
    #3
  4. Iwan Davies

    Iwan Davies Guest

    Out of interest, do you happen to know the permissible levels for SDSL?

    Seeing as getting SDSL seems to require the installation of a new line, it
    would seem that the SDSL line checker online simply checks that the exchange
    is enabled, rather than providing the (slightly) more accurate line rating
    that the ADSL checker gives.

    Cheers

    Iwan
     
    Iwan Davies, Jun 8, 2004
    #4
  5. Iwan Davies

    Mark Guest

    | On Tue, 8 Jun 2004 19:05:47 +0100, "Iwan Davies"
    |
    | >According to the ADSL line checker, I live too far from the exchange to
    get
    | >broadband. After contacting BT I learned this is basically because of an
    | >ancient cable run that is due to be replaced this month. Today, I looked
    at
    | >the SDSL line checker for BT Business Broadband Advanced, and it reported
    my
    | >line as being fit for SDSL, subject to survey! Is there no limitation on
    | >distance with SDSL? Or is the SDSL line checker less precise than the
    ADSL
    | >one?
    | >
    | >Iwan
    | >
    | IIRC, SDSL has much shorter line capabilities than ADSL because it is
    | symmetric! I had similar readings a while ago (NW Surrey), with
    | "too long for adsl", "capable of 512k sdsl" and an engineering test of
    | 4.5Km - which would consistent if the adsl/sdsl data was transposed.
    | PeeGee
    | --
    | The reply address is a spam trap. If you need to reply directly, put the
    UK where it should be - first.



    a.. 512Kbps - 3.4km
    b.. 1Mbps - 2.5km
    c.. 2Mbps - 1.6km
    This is cut and paste from Zen's site for SDSL. 512 has the same limit as
    full rate ADSL, but faster services have shorter lengths.

    Mark.
     
    Mark, Jun 9, 2004
    #5
  6. Iwan Davies

    Mark Guest

    | | >
    | > A dedicated line is installed for SDSL, so your poor quality existing
    line
    | > doesn't matter. SDSL is very much distance (or more accurately, line
    | > attenuation) dependent.
    | >
    | Out of interest, do you happen to know the permissible levels for SDSL?
    |
    | Seeing as getting SDSL seems to require the installation of a new line, it
    | would seem that the SDSL line checker online simply checks that the
    exchange
    | is enabled, rather than providing the (slightly) more accurate line rating
    | that the ADSL checker gives.
    |
    | Cheers
    |
    | Iwan



    a.. 512Kbps - 3.4km
    b.. 1Mbps - 2.5km
    c.. 2Mbps - 1.6km

    This is from Zen's site - 512 has the same limit as full rate ADSL, but
    anything faster is more stringent. The SDSL checker looks at exchange
    availability and existing line length. Your line quality is ignored as a
    dedicated one is installed.

    Mark
     
    Mark, Jun 9, 2004
    #6
  7. Iwan Davies

    Iwan Davies Guest

    In that case, the SDSL availability checker definitely only checks you're on
    an enabled exchange, as I am more than 3.4 km from the exchange as the crow
    flies (although there's only a couple of hundred metres in it). And the line
    loss recorded at my failed ADSL order was something like 83 dB... (I know
    it's a new line they install for SDSL, but as I entered my present number on
    the checker, they would presumably use that as an indication for the
    probable line length for a new line, or would match it up against my
    postcode to find my as-the-crow-flies distance from the exchange).

    Iwan
     
    Iwan Davies, Jun 10, 2004
    #7
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