How to use SNR tweaking for a faster or more stable connection

Adnan · 2017-07-18T09:21:14+00:00

TOC 1. What's this ? 2. Will it make my connection faster ? 3. Will it make my connection more stable ? 4. What modems is it compatible with ? 5. How do I do...

Adnan

I noticed today that my DSLAM's target SNR margin was set to 8dB (I am on Sodetel DSP, but I'm not sure who controls this). It was set to 10dB until yesterday. It seems that they're able to put more load on the network so they decreased the SNRM for extra speed.

Kareem

Adnan wroteI noticed today that my DSLAM's target SNR margin was set to 8dB (I am on Sodetel DSP, but I'm not sure who controls this). It was set to 10dB until yesterday. It seems that they're able to put more load on the network so they decreased the SNRM for extra speed.

Usually it should be the other way around when they have high load since higher SNRM improves stability unless i'm mistaken.

Adnan

Kareem wrote
Adnan wroteI noticed today that my DSLAM's target SNR margin was set to 8dB (I am on Sodetel DSP, but I'm not sure who controls this). It was set to 10dB until yesterday. It seems that they're able to put more load on the network so they decreased the SNRM for extra speed.
Usually it should be the other way around when they have high load since higher SNRM improves stability unless i'm mistaken.

Not sure we understood each other correctly.

But what I'm speculating here, rephrased:

Sodetel put the target SNRM to 10dB initially. They tested it and found that their network can handle more load and still be stable, so they lowered the SNRM to 8dB to give more speed. Now the load is higher than before, but still not high enough to cause stability problems from their side.

Mylo89

@Adnan, what about Thomson modem tg 585 v7

Adnan

@Mylo89 mohamadk97 has the same modem. It has a broadcom chipset so in theory the tweak should work. But unfortunately it didn't for him. Can you try the broadcom method provided by Kareem to confirm ?

If it fails, you can try flashing a custom firmware as Kareem suggests.

dio

So i just realised my router can't adjust SNR margins. It's an TP-Link VR400. :(

Adnan

@dio it really seems that a whole lot of modems don't support this feature, I don't know why. You always have the option of contacting your ISP. Good luck.

TheLebGeek

Does anyone know if the Cisco-Linksys XAC1900 Dual Band AC1900 will be able to edit these values? I don't have the modem but I'm thinking to buy it

dio

Adnan wrote@dio it really seems that a whole lot of modems don't support this feature, I don't know why. You always have the option of contacting your ISP. Good luck.

Already did. Asked them if they could adjust the SNR margin on my line, they said it's not possible to do it for individuals, if they adjust it, they will have to do it for the whole area.

Which is starting to explain the fact that why my connection has decreased from 12 to 5 in a month.

Speaking of which, does anyone now if Ogero can individually adjust the SNR margin for a user? If so, who can I talk to to adjust it. Mr Rifai perhaps?

new_user

My modem is speedtouch 546 v6 with firmware 6.2.29.2. I need to downgrade to version 6.1 to be able to use SNR tweaking as this feature was disabled in version 6.2. I could not find the firmware anywhere except on this forum http://www.speedtouchforum.de/viewtopic.php?t=1089#8355

They seem to be the right firmware but I am afraid of bricking my modem. Is there any precautionary step i can do to gaurantee I can get my modem to work in case they are not the right firmware or something goes wrong? For example can I download/backup the firmware on my modem before I start? What are your recommendations?

new_user

I want to buy a new modem specifically to get the snr tweaking feature. Can you please recommend a good modem that is guaranteed 100% to have this feature?

Idler

new_user wroteI want to buy a new modem specifically to get the snr tweaking feature. Can you please recommend a good modem that is guaranteed 100% to have this feature?

ASUS allows you to tweak you SNR by tweaking the DB in the interface.

wollyka

Idler wrote
new_user wroteI want to buy a new modem specifically to get the snr tweaking feature. Can you please recommend a good modem that is guaranteed 100% to have this feature?
ASUS allows you to tweak you SNR by tweaking the DB in the interface.

True but it only works on adsl connection in the interface and not VDSL

For VDSL, you have to use the command line:
wan vdsl2 set target_snrm XXXX
wan adsl reset

However, Asus modems don't have a Broadcom chipset so they are more prone to CRC errors and are less stable on noisy lines.

Idler

I had the same thought until i purchased one, if you tweak it just about right its stable and pretty good i've been on stable 4mbps for about a year since i got it with minimum of CRC errors around 8000/month also you may install open source firmware that gives you a major boost to tweak it through SSH

wollyka wrote
Idler wrote
new_user wroteI want to buy a new modem specifically to get the snr tweaking feature. Can you please recommend a good modem that is guaranteed 100% to have this feature?
ASUS allows you to tweak you SNR by tweaking the DB in the interface.
True but it only works on adsl connection in the interface and not VDSL

For VDSL, you have to use the command line:
wan vdsl2 set target_snrm XXXX
wan adsl reset

However, Asus modems don't have a Broadcom chipset so they are more prone to CRC errors and are less stable on noisy lines.

TokMe3HrsToSolveChallenge

wollyka wrote
Idler wrote
new_user wroteI want to buy a new modem specifically to get the snr tweaking feature. Can you please recommend a good modem that is guaranteed 100% to have this feature?
ASUS allows you to tweak you SNR by tweaking the DB in the interface.
True but it only works on adsl connection in the interface and not VDSL

For VDSL, you have to use the command line:
wan vdsl2 set target_snrm XXXX
wan adsl reset

However, Asus modems don't have a Broadcom chipset so they are more prone to CRC errors and are less stable on noisy lines.

i am doing that using putty to my asus modem but nothing is changing on the asus dashboard

also it lets me change the vdsl snr not the adsl and my connection is adsl

wollyka

TokMe3HrsToSolveChallenge wrote
wollyka wrote
Idler wrote
ASUS allows you to tweak you SNR by tweaking the DB in the interface.
True but it only works on adsl connection in the interface and not VDSL

For VDSL, you have to use the command line:
wan vdsl2 set target_snrm XXXX
wan adsl reset

However, Asus modems don't have a Broadcom chipset so they are more prone to CRC errors and are less stable on noisy lines.
i am doing that using putty to my asus modem but nothing is changing on the asus dashboard

also it lets me change the vdsl snr not the adsl and my connection is adsl

Did you try using wan adsl set target_snrm XXXX or wan adsl2 set target_snrm XXXXinstead of vdsl2?
Also what target_snrm are you using?

When I had adsl, I was using the Asus interface and it was working just fine. When I switched to VDSL, i had to use putty and the commands

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