Technicolor and telnet

Discussion in 'Network Routers' started by Fabrizio, Feb 8, 2015.

  1. Fabrizio

    Mcwm Guest

    If you took your time to have a little look @ the pdf i posted link to,
    you would see that it is possible for OP to re-trim his lines(from modem
    to ISP). He could even tweak settings his ISP wont do for him.

    That being said, it is not a smart thing getting caught in ;-)

    Mcwm, Feb 22, 2015
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  2. Fabrizio

    David Guest

    Again AFAICR there was no issue with tweaking the line parameters with
    your modem to a BT exchange.

    Of course, it was my modem and there was a lot more hand crafting with ADSL
    connections to get the best out of them in those days.

    We are talking small ISPs using BT lines and having proactive support.
    The little guys have mainly gone now, though.

    I think a guide to if tweaking the modem is acceptable is if it supplied
    by your ISP and you are given the user ID and password then you are free
    to tweak.

    Nice to see some knowledgeable people joining the tread :)


    Dave R
    David, Feb 22, 2015
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  3. Fabrizio

    David Guest

    Not really - more like an amplifier having a volume control.

    Not really rocket science - too much signal can swamp a line, too little
    and it gets lost in the background noise.

    Oh, and you can change voltages and convert from AC to DC and back again.
    Just not always cost efficiently.


    Dave R
    David, Feb 22, 2015
  4. Fabrizio

    Fabrizio Guest

    Thanks to all for your interest, the guide that you have furnished me, I
    have also downloaded. However' there is a little of confusion in your posts.
    What I am looking, is to increase the speed of my adsl, that it normally
    connects it to 16 mb and I would like it to 20 mb or near it. I thought
    about varying SNR but if you have a best idea to make better, tell me which
    variations to do it. I have the password for the modem-router and I am
    trained to telnet without any problem, therefore the commands telnet, I can
    use them.

    You say thing and whether to vary.. to increase the adsl signal...

    Thanks again
    Fabrizio, Feb 22, 2015
  5. Fabrizio

    Rambo Guest

    Fabrizio wrote on 22/02/2015 21:29:
    I think that the guy able to increase your adsl signal or adsl speed is
    your ISP.
    Rambo, Feb 22, 2015
  6. Fabrizio

    Fabrizio Guest

    I have already contacted my ISP that 20 Mb guarantees me as from contract,
    but my modem doesn't succeed to hook more than 16,76 Mb.
    The problem it is born really from here. To increase with the modem the more
    possible the adsl signal...
    Fabrizio, Feb 23, 2015
  7. Fabrizio

    David Guest

    This may not be possible.

    You would have to read the details of the line as seen by the modem -
    signal strength, error rate, things like that.

    You should be able to list the status of the modem using Telnet, if you
    have the manual and the user id and password.

    Only when you can see all the current settings can you work out if you can
    improve anything.

    Your modem may already be set up to get the best out of the line - you may
    just have a very noisy line a long way away from the exchange, for example.

    The usual way to get help with this is to dump the status from the modem
    and post the information in a thread so people can see what the modem is


    Dave R
    David, Feb 23, 2015
  8. Fabrizio

    Rambo Guest

    Fabrizio wrote on 23/02/2015 16:18:
    The 20Mb guaranty is a maximum obtained when your are very close to the
    exchange card. Otherwise the speed decrease when the distance increase.
    Rambo, Feb 24, 2015
  9. Fabrizio

    Fabrizio Guest

    Hi at all, post the information status, from the modem :

    Uptime: 1 day, 23:23:13

    DSL Type: ITU-T G.992.5

    Bandwidth (Up/Down) [kbps/kbps]: 997 / 16.603

    Data Transferred (Sent/Received) [GB/GB]: 17,35 / 21,92

    Output Power (Up/Down) [dBm]: 12,1 / 18,9

    Line Attenuation (Up/Down) [dB]: 10,6 / 18,5

    SN Margin (Up/Down) [dB]: 14,3 / 9,0

    System Vendor ID (Local/Remote): TMMB / ----

    Chipset Vendor ID (Local/Remote): BDCM / BDCM

    Loss of Framing (Local/Remote): 0 / 0

    Loss of Signal (Local/Remote): 0 / 0

    Loss of Power (Local/Remote): 0 / 0

    Loss of Link (Remote): -

    Error Seconds (Local/Remote): 374 / 0

    FEC Errors (Up/Down): 0 / 0

    CRC Errors (Up/Down): 0 / 408

    HEC Errors (Up/Down): 0 / 1.027

    I wait your helps...

    Thank you again

    Fabrizio, Feb 24, 2015
  10. Fabrizio

    Rambo Guest

    Fabrizio wrote on 24/02/2015 17:06:
    As I said only your isp or modifying the distance of your house to the
    exchange card can modify your showed values.

    The 20Mb guaranty is a maximum obtained when your are very close to the
    exchange card. Otherwise the speed decrease when the distance increase.
    Rambo, Feb 24, 2015
  11. Fabrizio

    David Guest

    Read this thread:

    You do appear to have significant CRC and HEC errors on your up link,
    which may mean that line quality (possibly internal wiring) is stopping
    you from achieving maximum speed.

    You might consider posting your numbers to the site above as they appear
    to offer advice on line quality metrics, which you obviously aren't
    getting here.

    Too long ago for me to offer any effective advice - I would only be
    resorting to Google.

    Others don't seem to grasp the concepts, so I would look for another forum.


    Dave R
    David, Feb 25, 2015
  12. Fabrizio

    David Guest

    Just stepping back up thread - apparently the figure is the TARGET SNR
    that the device should try to optimise to achieve - not the actual SNR on
    the line which as you say is only indirectly modified by upping the signal
    or reducing the noise.
    David, Feb 25, 2015
  13. Fabrizio

    David Guest

    Just one more thing...

    ....the web site

    can guess maximum speeds for the UK based on Downstream Attenuation.

    Feeding in your attenuation (rounded to 19) gives an estimate of maximum
    speed of 20,608 kbps

    So it looks as though your physical line should in ideal circumstances
    support a higher speed.

    However before trying to alter power settings or target SNR settings
    (either at your end or by asking the ISP to modify their end) you have to
    be sure that you have eliminated other sources of low throughput, such as
    errors due to poor wiring or connecting cables in your house.

    If possible, you should also try and connect an alternative modem to see
    if that improves your line statistics.


    Dave R
    David, Feb 25, 2015
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