Technicolor and telnet

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

  1. Fabrizio

    Fabrizio Guest

    Hi to all I have a modem-router technicolor TG582n I would like to lower SNR
    from 9 to 7 for more increment speed in adsl. I have tried with telnet to
    enter in the system but I don't know where and which sting in the menu, to
    act for changing that value. Who can help me?

    Thanks Fabrizio
    Fabrizio, Feb 8, 2015
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  2. Fabrizio

    Rambo Guest

    Fabrizio wrote on 08/02/2015 14:44:
    Perhaps this page can help you ?
    Rambo, Feb 8, 2015
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  3. Fabrizio

    Fabrizio Guest

    Thanks a lot, I tryed, but I think the router's software is looked, because
    that command is anknow in telnet.. in my technicolor
    Fabrizio, Feb 10, 2015
  4. Fabrizio

    Nil Guest

    I have a different model Technicolor modem/router that's supplied to me
    by my cable provider, Comcast. Its user interface allows me the user
    access to very few of its features. I'm sure the device contains a
    telnet server, but it's either turned off or hidden to me. There's no
    way for me to turn it on.

    I did find a user guide for your modem. It mentions telnet. Have you
    tried its method? See the "Technicolor TG582n Change Network Settings
    Guide" pdf entry on this page. There are some other entries that might
    be useful...
    Nil, Feb 10, 2015
  5. Fabrizio

    Fabrizio Guest

    I have tried to read the guide that you have given me, but it speaks of
    connection between modem and computer. Instead I am looking for with telnet
    to connect the modem with the adsl provider with diferent set in snr. I am
    set on a snr to 9, and I want to bring it to 7, but the command of telnet it
    doesn't recognize it. I fear both stopped by the builder...
    Fabrizio, Feb 13, 2015
  6. Fabrizio

    Fabrizio Guest

    I have tried BKTSNRSET, the program it recognizes telnet, but when snr is
    varied does it appear command not recognized. Somebody know, how this modem
    can be unlooked ?
    Fabrizio, Feb 14, 2015
  7. Fabrizio

    Char Jackson Guest

    I have no idea what you're really trying to do, but on the face of it, it
    looks like you want to change your SNR, or Signal to Noise Ratio. If so, SNR
    isn't a number that you can directly change. Perhaps you can do something to
    change your signal levels, or perhaps you can do something to change your
    noise levels, either of which will affect your SNR, but you can't just
    change your SNR directly. It's a computed value.

    Furthermore, if you're somehow talking about the side of the modem that
    faces your ISP, then forget about it entirely. They own all of that, from
    their CO equipment to the cable plant to the WAN interface on your modem. If
    there's a WAN-side issue with your SNR and they haven't proactively noticed
    and corrected it, the best you can do is to let them know that you're having
    a problem.
    Char Jackson, Feb 15, 2015
  8. Fabrizio

    Nil Guest

    I don't get it either. I just noticed from the manual I found that it
    appears that some settings are available from the modem's GUI, and some
    others are only available from a terminal session via telnet. Whether
    or not telnet is enabled in his modem, I can't know. I suspect not.
    Nil, Feb 16, 2015
  9. Fabrizio

    Fabrizio Guest

    Thanks for your interest, I have tried to read the manual, some available
    instruction are directly from the modem, but the way to change the db with
    snr to 7 rather than to 9 as it connects now, there arent possible.
    A program BKTSNRSET can it value change for the modem-router, but only with
    chipset Broadcom.
    In my case this its impossible because these commands are not recognized
    like type:

    adslctl configure--snr 1 or different values, for example 50 less 3db or 25
    less 4.5 db

    Is there anybody that know how is possible change this signal noise ratio in
    anyway ?

    Regard Fabrizio
    Fabrizio, Feb 19, 2015
  10. Fabrizio

    Char Jackson Guest

    The answer hasn't changed since the last time. You still change the SNR by
    changing either of the values that are used to compute it; i.e., the signal
    level or the noise level. If you can't do either of those things, you're
    stuck with what you have.
    Char Jackson, Feb 19, 2015
  11. Fabrizio

    Fabrizio Guest

    Ok but where i can try to change that value (the signal level or the noise
    level) in the modem menu or with telnet ? Sorry again, but i dont understand

    Thanks a lot !
    Fabrizio, Feb 20, 2015
  12. Fabrizio

    Char Jackson Guest

    Oh, that's easy. Just move closer to the Central Office (CO). Your signal
    level will likely be stronger, your noise levels will likely be lower, your
    SNR will be improved, and your speed may improve.
    Char Jackson, Feb 20, 2015
  13. Fabrizio

    Rambo Guest

    Char Jackson wrote on 20/02/2015 17:05:
    The problem is that Fabrizio think that those values are not physical
    values, but arbitrary value that can be changed by modifying a computer
    variable :)

    The SNR is just a ratio between the mesured value of the Signal and the
    mesured value of the Noise.
    Rambo, Feb 20, 2015
  14. Fabrizio

    Char Jackson Guest

    Hopefully, he's catching on. :)
    Char Jackson, Feb 20, 2015
  15. Fabrizio

    David Guest

    I should note that back in the day when I has an ADSL modem, I could
    connect to it via Telnet, read the current settings, and AFAICR tweak
    things like signal strength in the settings.

    Long time back (I'm on cable now) but as far as I remember the line card
    in the exchange used to self tune to the line, and sometimes got things
    wrong, and you could alter parameters to give it a kick.

    Previous generations of kit, and in the UK, but it isn't totally
    unreasonable to want to be able to Telnet into the router and alter some
    of the values at your end of the link.

    It really depends on the modem, what kind of kit is in the exchange, and
    how the line stabilises itself.

    Oh, and if you can increase the power of the signal from your modem
    without increasing the noise, won't that change the SNR?


    Dave R
    David, Feb 21, 2015
  16. Fabrizio

    Rambo Guest

    David wrote on 21/02/2015 19:56:
    Same as with my electrical power .. I have 235 volts can I change
    that with increasing a variable to have 240 volts ? :) :)
    Rambo, Feb 21, 2015
  17. Fabrizio

    Mcwm Guest

    On some routers you can adjust transmit power. On DD-wrt you can even
    ask what power modes can be used by telnet this command:

    [email protected]:~# iwlist ath0 txpower
    ath0 8 available transmit-powers :
    0 dBm (1 mW)
    9 dBm (7 mW)
    12 dBm (15 mW)
    15 dBm (31 mW)
    18 dBm (63 mW)
    21 dBm (125 mW)
    24 dBm (251 mW)
    27 dBm (501 mW)
    Current Tx-Power=27 dBm (501 mW)

    For a Technicolor TG582n it looks like this;

    pwr wlan-pwr-options
    Modify/Display the WLAN power control options
    pwr wlan-pwr-options [t-on = <number{4-600}>]
    [t-off = <number{4-600}>]
    [t-ext = <number{2-600}>]
    t-on Wireless subsystem On-time (s) OPTIONAL
    t-off Wireless subsystem Off-time(s) OPTIONAL
    t-ext Wireless subsystem On-time Extension (s) OPTIONAL

    If you want to see all the cli(telnet) commands for this router/modem,
    you can download it here;

    It is a nice little booklet @ 864 pages. Only cli commands and only for
    that specific router/modem.

    To wrap it up; IF OP have the username and password for the router, more
    can be done then you think. Even if things are disabled in the gui

    Mcwm, Feb 22, 2015
  18. Fabrizio

    Nil Guest

    Interesting stuff. Thanks!
    It's kind of hard to understand what the OP is getting at - I blame
    that on a language barrier. But as far as I can tell from his confusing
    answers, telnet is either turned off in his modem and the GUI doesn't
    allow him to turn it on, or the default telnet ID and password have
    been changed and he doesn't know what they are.
    Nil, Feb 22, 2015
  19. Fabrizio

    Mcwm Guest

    Ya most welcome.

    Mcwm, Feb 22, 2015
  20. Fabrizio

    Char Jackson Guest


    AFAICT the OP isn't asking about how to change his WiFi transmit power. He
    sometimes refers to getting increased speed (from his ISP, I presume), and
    WiFi transmit power has nothing to do with that.

    He wants to improve his SNR but he won't be able to do that, so the whole
    discussion is a dead end.
    Char Jackson, Feb 22, 2015
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