Technicolor and telnet

[Fabrizio]

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

[Rambo]

Perhaps this page can help you ?
https://decoding.wordpress.com/2010/01/21/tweaking-snr-margin/

[Fabrizio]

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

[Nil]

On 08 Feb 2015, "Fabrizio" <own...@libero.it> wrote in
alt.comp.networking.routers:

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...

https://www.google.com/search?q=technicolor+router+telnet

[Fabrizio]

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]

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 ?

[Char Jackson]

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.

[Nil]

On 15 Feb 2015, Char Jackson <no...@none.invalid> wrote in
alt.comp.networking.routers:

> 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.

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.

[Fabrizio]

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

[Char Jackson]

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.

[Fabrizio]

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 !

[Char Jackson]

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.

[Rambo]

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.

[Char Jackson]

On Sat, 21 Feb 2015 00:34:04 +0100, Rambo <Richmon...@pircarre.be>
wrote:

Hopefully, he's catching on. :-)

[David]

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?

Cheers

Dave R

--
Windows 8.1 on PCSpecialist box

[Rambo]

David wrote on 21/02/2015 19:56:
> On Fri, 20 Feb 2015 17:39:36 -0600, Char Jackson wrote:
>
>> On Sat, 21 Feb 2015 00:34:04 +0100, Rambo <Richmon...@pircarre.be>
>> wrote:
>>
>>> 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.
>> Hopefully, he's catching on. :-)
>

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

Same as with my electrical power .. I have 235 volts ...how can I change
that with increasing a variable to have 240 volts ? :-) :-)

[Mcwm]

@ 22-02-2015 kl. 00:06 Rambo wrote:

> Same as with my electrical power .. I have 235 volts ...how can I change
> that with increasing a variable to have 240 volts ? :-) :-)
>

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:

root@DD-WRT:~# 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
SYNTAX:
pwr wlan-pwr-options [t-on = <number{4-600}>]
[t-off = <number{4-600}>]
[t-ext = <number{2-600}>]
where:
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;

http://help.demon.net/files/2013/03/TG582n-CLI-Guide.pdf

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

Kindly
Mac

[Nil]

On 21 Feb 2015, Mcwm <ne...@glostrup.it> wrote in
alt.comp.networking.routers:

> 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:
>
> root@DD-WRT:~# 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)

Interesting stuff. Thanks!

> For a Technicolor TG582n it looks like this;
>
> pwr wlan-pwr-options
> Modify/Display the WLAN power control options
> SYNTAX:
> pwr wlan-pwr-options [t-on = <number{4-600}>]
> [t-off = <number{4-600}>]
> [t-ext = <number{2-600}>]
> where:
> 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;
>
> http://help.demon.net/files/2013/03/TG582n-CLI-Guide.pdf
>
> 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

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.

[Char Jackson]

On Sun, 22 Feb 2015 02:21:18 +0100, Mcwm <ne...@glostrup.it> wrote:

>@ 22-02-2015 kl. 00:06 Rambo wrote:
>
>> Same as with my electrical power .. I have 235 volts ...how can I change
>> that with increasing a variable to have 240 volts ? :-) :-)
>>
> 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:

<snip>

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.

[Mcwm]

@ 22-02-2015 kl. 02:49 Nil wrote:

> Interesting stuff. Thanks!

Ya most welcome.

Kindly
Mac

[Mcwm]

@22-02-2015 kl. 04:24 Char Jackson wrote:
> He wants to improve his SNR but he won't be able to do that, so the whole
> discussion is a dead end.

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 ;-)

Kindly
Mac

[David]

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 :-)

[David]

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.

[Fabrizio]

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

[Rambo]

I think that the guy able to increase your adsl signal or adsl speed is
your ISP.

[Fabrizio]

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...

[David]

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
doing.

[Rambo]

The 20Mb guaranty is a maximum obtained when your are very close to the
exchange card. Otherwise the speed decrease when the distance increase.
http://www.speedguide.net/dsl_speed_calc.php

[Fabrizio]

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

[Rambo]

As I said only your isp or modifying the distance of your house to the
exchange card can modify your showed values.

[David]

Read this thread:

www.ispreview.co.uk/talk/showthread.php/33326-Diagnose-ADSL-connection

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.

[David]

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]

On Tue, 24 Feb 2015 17:06:05 +0100, Fabrizio wrote:

Just one more thing...

...the web site

http://www.kitz.co.uk/adsl/max_speed_calc.php

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.