Thread: changing mode from ADSL2+ to Gdmt

How to change the mode for utstarcom WA3002g4? I have UL750. Will it affect download speeds ?

Just type in 192.168.1.1 in address bar of ur browser.
When it asks for username and password, put admin(In both places)
Go to tab of ADSL under advanced
Select modulation type as G.DMT

For that->
Tick G.DMT and uncheck remaining others.

After that save settings to flash memory of router. Restart ur router!
Now u can use ur router in G.DMT mode!

Holy ****!!!! After changing mode from ADSL2+ to G.DMT, my downstream SNR value increased from 16 to 21.1. My downstream attenuation decreased from 46 to 40. Thanks Chinmay. Im on UL750.

****, it decreased back to 17.3. Why? Back to 16.9. I dont get it. Whats the difference between ADSL2+ and G.DMT? Do the modes change download speed.


Statistics -- ADSL

Mode: G.DMT
Type: Fast
Line Coding: Trellis On
Status: No Defect
Link Power State: L0

Downstream Upstream
SNR Margin (dB): 17.1 22.0
Attenuation (dB): 40.0 18.0

I changed mode to G.DMT from ADSL2+ as chinmay told. I saved the settings. The router automatically rebooted. I found an improvement of 3-4 in downstream SNR values and a decrease of 5 db in downstream attenuation.
When i manually switched off and switched it back on. The mode was ADSL2+ again.

Statistics -- ADSL

Mode: ADSL2+
Line Coding: Trellis On
Status: No Defect
Link Power State: L0

Downstream Upstream
SNR Margin (dB): 14.5 23.0
Attenuation (dB): 45.5 22.6

Mode: G.DMT
Type: Fast
Line Coding: Trellis On
Status: No Defect
Link Power State: L0

Downstream Upstream
SNR Margin (dB): 16.7 22.0
Attenuation (dB): 40.0 18.0

Originally Posted by harsham05

Holy ****!!!! After changing mode from ADSL2+ to G.DMT, my downstream SNR value increased from 16 to 21.1. My downstream attenuation decreased from 46 to 40. Thanks Chinmay. Im on UL750.

****, it decreased back to 17.3. Why? Back to 16.9. I dont get it. Whats the difference between ADSL2+ and G.DMT? Do the modes change download speed.


Statistics -- ADSL

Mode: G.DMT
Type: Fast
Line Coding: Trellis On
Status: No Defect
Link Power State: L0

Downstream Upstream
SNR Margin (dB): 17.1 22.0
Attenuation (dB): 40.0 18.0

I changed mode to G.DMT from ADSL2+ as chinmay told. I saved the settings. The router automatically rebooted. I found an improvement of 3-4 in downstream SNR values and a decrease of 5 db in downstream attenuation.
When i manually switched off and switched it back on. The mode was ADSL2+ again.

Statistics -- ADSL

Mode: ADSL2+
Line Coding: Trellis On
Status: No Defect
Link Power State: L0

Downstream Upstream
SNR Margin (dB): 14.5 23.0
Attenuation (dB): 45.5 22.6

Mode: G.DMT
Type: Fast
Line Coding: Trellis On
Status: No Defect
Link Power State: L0

Downstream Upstream
SNR Margin (dB): 16.7 22.0
Attenuation (dB): 40.0 18.0

SNR margin decreases during peak hours, and increases during non-peak hours.
In evening time, many users use broadband services, so SNR value gonna decrease. But dont worry it wont harm ur connection. SNR above 7 is sufficient for a stable connection, what concern me a lot is ur line attenuation, it shouldnt go beyond 30.
Do u have any parallel wiring in ur house? How far u stay away from NIB server?

Read about SNR here
Signal-to-noise ratio - Wikipedia, the free encyclopedia

I'll post my status
I m on ADSL2+
Item Downstream Upstream
SNR Margin 17.5db 14.5db
Line Attenuation 25.5db 21.0db
Loss of Signal 0 0
CRC Errors 0 0
Data Rate 6139 Kbps 519 Kbps
Latency Fast Fast

whats the use of changing modes? is there any advantage of G.DMT over ADSL2+? why does my modem go back to ADSL2+ after changing to G.DMt? What is parallel wiring? I will find out how far I am from my local exchange.

well , i see everybody is putting stress to change mode from adsl2+ to Gdmt...can anybody explain what does it means??? we can enable all options at once then what is need of disable or enable a particular mode..if bsnl has given a option to select all,it means that all options will work as per system or load on line...well i dn't know about this all stuff but no body has made clear details of this mode issue..first of all we should know what we r changing and what r its results..

i request senoir members to plzzz tell us in detail about this feature .many members will get help to solve their problems if they r made clear about their problems by experienced members

Originally Posted by harsham05

whats the use of changing modes? is there any advantage of G.DMT over ADSL2+? why does my modem go back to ADSL2+ after changing to G.DMt? What is parallel wiring? I will find out how far I am from my local exchange.

after changing mode plzzz reboot ur modem..or type "telnet 192.168.1.1" in command promt or in run and fill ur username n password.after that type reboot ..thats it...now see it works or not

I don't know what's special with Gdmt mode. My connection is much faster in ADSL2+ mode.

Originally Posted by Archer

I don't know what's special with Gdmt mode. My connection is much faster in ADSL2+ mode.

well i can explain it like this[source-internet]

G.lite
Officially known as G.992.2, it is now a standard way to install Asymmetric Digital Subscriber Line service. G.lite makes it possible to have Internet connections to home and business computers at up to 1.5 Mbps over regular phone lines.
G.dmt
This refers to the ADSL standard approved by the International Telecommunications Union (ITU). G.dmt indicates full rate ADSL which provides standards for higher speed ADLS than G.lite. G.dmt provides maximum data rates of 8 Mbps downstream to the subscriber and 1.5 Mbps upstream from the subscriber.

OK! That explains why everyone recommends it. But my connection speed didn't change after setting to G.dmt mode and I had to change back to ADSL2+ because it caused some kind of problem in connection. My snr didn't increase either.

Originally Posted by Archer

OK! That explains why everyone recommends it. But my connection speed didn't change after setting to G.dmt mode and I had to change back to ADSL2+ because it caused some kind of problem in connection. My snr didn't increase either.

so what do u think??i think there is no need of more explanation as we see adsl2+ or adsl2 is far better mode than G.DMT mode...so here we got all stuff and its time to change ur mode to adsl2+[for better speed]


ADSL2+ has only been available since it was approved for use in September 2005. ADSL2+ means you can now get even higher speeds than ever before. ADSL2+ (G.992.5), more than doubles the downstream data rate (bandwidth) of ADSL to as much as 25M bit/sec. (25 Mbps)


ADSL2
Asymmetric Digital Subscriber Line 2(just incase when adsl2+ is down)


now here is G.dmt
This refers to the ADSL standard approved by the International Telecommunications Union (ITU). G.dmt indicates full rate ADSL which provides standards for higher speed ADLS than G.lite. G.dmt provides maximum data rates of 8 Mbps downstream to the subscriber and 1.5 Mbps upstream from the subscriber.

Check this link Which mode is ur modem in : ADSL2+ or G.Dmt?. if you haven't already. I don't think changing to G.dmt is any good until BSNL decides to give us at least a 4 Mb connection. Just stick with ADSL2+.

Originally Posted by Archer

Check this link Which mode is ur modem in : ADSL2+ or G.Dmt?. if you haven't already. I don't think changing to G.dmt is any good until BSNL decides to give us at least a 4 Mb connection. Just stick with ADSL2+.

How do i change to gdmt mode in bsnl

In a similar page in your modem
http://i19.tinypic.com/6kqygzt.jpg
uncheck box adsl2 +
Save reboot wait for two minutes.
You can check only these boxes gdmt g lite t413 bitswap enabled.
If your modem is different give
modem/make/model/number.

so i hav to uncheck adsl2+
shud i i uncheck adsl also??

Originally Posted by rohan.

so i hav to uncheck adsl2+
shud i i uncheck adsl also??

If your connection is stable you need not uncheck adsl if shown as selected.
Check any improvement in SNR/Attn/ and connection stability.

Originally Posted by Archer

I don't know what's special with Gdmt mode. My connection is much faster in ADSL2+ mode.

Mine too.........

Now G.DMT isn't working for me.

G.DMT was working 4-5 months ago for me and when i tried now, it does not worked.
The modem remains in the DOWN state.

HI,
I'm facing a serious bandwidth Choke 'coz of SNR issues (I'm on a limited 1111 plan- browsing speed between 500-650Kbps)as displayed in the readings below as copied 4rm my router WA3002G4. i'm having this issue since late 2007 from the time I've taken this connection,since then i've been struggling and fighting with the bsnl exchange people.But no results,hopeless technical support. Many times they have closed my trouble tickets which had been raised for BB issue given the solution as "phone is working properly" (lol).I'd appreciate if anyone from this bunch of techies could give me a solution. [I dont have any other service providers in my area (RajaRajeshwari Nagar,Bengaluru)].

SNR Readings:

Statistics -- ADSL

Mode: G.DMT
Type: Fast
Line Coding: Trellis On
Status: No Defect
Link Power State: L0

Downstream Upstream
SNR Margin (dB): 30.0 8.0
Attenuation (dB): 31.0 23.0
Output Power (dBm): 12.7 19.6
Attainable Rate (Kbps): 8928 680
Rate (Kbps): 2048 512
K (number of bytes in DMT frame): 65 17
R (number of check bytes in RS code word): 0 0
S (RS code word size in DMT frame): 1 1
D (interleaver depth): 1 1
Delay (msec): 0 0
Super Frames: 111804 111772
Super Frame Errors: 0 114
RS Words: 0 0
RS Correctable Errors: 0 0
RS Uncorrectable Errors: 0 N/A
HEC Errors: 0 51
OCD Errors: 0 0
LCD Errors: 0 0
Total Cells: 9180745 0
Data Cells: 392074 0
Bit Errors: 0 0

Total ES: 0 0
Total SES: 0 0
Total UAS: 11 0

Cheers!
Arun

My Stats
http ://img180.imageshack.us/i/14372721.jpg/
http ://img28.imageshack.us/i/17399800.jpg/
http ://img293.imageshack.us/i/44337643.jpg/


i am not allowed to post links lol :P

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Check your telephone line from the Junction Box provided by BSNL.
Check for Darkening of contacts/ oxidization/ high resistance contacts.
use new RJ11 cable( short with connectors)
Also check the Rj45 ( should not be black )
Your SNR d/l should improve more than 10 to 20 dB
and Attn d/l should decrease less than 20 or 30 db.
Presume you have not connected other extension phone/s in other rooms directly to BSNL phone junction.
2.
Mod mode GDMT seems better snr . try attn angle.