Solution to the PPP Down router issue READ NOW

[chirantha7777]

I have found a solution to the notorious PPP down problem.

From the information I can gather PPP down occurs because the ADSL circuit at the ISP (Sri Lanka Telecom) does not support the router ADSL TYPE. Even though we connect and use it but the ADSL TYPE is requesting FULL Line Quality which the SLT circuit cannot offer.

What I mean by TYPE is the ADSL Modulation type. Most routers off the market are configured to be ADSL2 or ADSL2+ which is NOT what SLT expects. SLT said its G.Dmt .

Why not ADSL2 or ADSL2+ ? because these are used for very fast Broadband! not for a 512Kpbs of 2048Kbps line. If you use ADSL2 or ADSL2+ what will happen is the smallest disturbance on the line causes packets to mismatch and because of the circuit type conflict results in a PPP Down

What I did to solve the problem is really simple.

1. Went into the Router Config through 192.168.1.1
2. Advanced Settings -> DSL (ADSL for Prolink I believe)
3. Unticked all boxes except G.Dmt
4. Applied changes

What I noticed is that I have improved my speed as well. In my router (and all routers I have tested) the speed showed as 508Kbps and 124Kbps but when I did the above, the speed went upto 512Kpbs and 128Kbps! Not much, but it confirmed the setting that I am in now is the CORRECT mode for my ADSL line.

My Router was set up by SLT (for peo TV and Stuff) and they never changed the settings.

Someone need to poke a SLT Engineer to respond to this. May be I am wrong... It also seems after the setting change, the IP change from SLT (Every 10 hours) is TRULY unnoticeable (previously, connections dropped and stuff).

 

[Anusha]

Probably the routers provided by the SLT are configured that way. I couldn't find such a setting in this crappy ZTE router. But I remember the old D-Link router had the option.

 

[dinukap4]

Bro when i go to 192.168.1.1 It is asking me for my Username and Pass... I can't remember

 

[prasadana2]

well u gota go to advance-
click on WAn
then click on ADSL

default user-name and pass for the slt router is admin admin

also notice there are two settings as well as called

SRA: SRA software allows modems to make seamless data transfer rate changes to avoid dropping a connection.

see /forum-replies.cfm?t=913782

Bitswapping: adapts to errors on the line:

As line conditions change, bit swapping allows the modem to swap bits around different channels, without retraining, as each channel becomes more or less capable. If bit swapping is disabled then this does not happen and the modem needs to retrain in order to adapt to changing line conditions.

see: http://en.wikipedia.org/wiki/ITU_G.992.1

Look here for more from google search:

http://www.google.com/search?q=Seamless+Rate+Adaptation

http://www.google.com/search?num=50&hl=en&newwindow=1&q=adsl+bit+swapping

 

[prasadana2]

well i also use Google Dns which improved my browsing speeds ..

http://code.google.com/speed/public-dns/

 

[crashzone]

Thanks man Its works to my Dlink router too. in my 2mbps slt line my uplod speed was 509kbps now its getting 512kbps

 

[Anusha]

oops i didn't see that first. thanks. i will see if it improves anything. adsl is very slow these days for me.

 

[dinukap4]

well u gota go to advance-
click on WAn
then click on ADSL

default user-name and pass for the slt router is admin admin

also notice there are two settings as well as called

SRA: SRA software allows modems to make seamless data transfer rate changes to avoid dropping a connection.

see /forum-replies.cfm?t=913782

Bitswapping: adapts to errors on the line:

As line conditions change, bit swapping allows the modem to swap bits around different channels, without retraining, as each channel becomes more or less capable. If bit swapping is disabled then this does not happen and the modem needs to retrain in order to adapt to changing line conditions.

see: http://en.wikipedia.org/wiki/ITU_G.992.1

Look here for more from google search:

http://www.google.com/search?q=Seamless+Rate+Adaptation

http://www.google.com/search?num=50&hl=en&newwindow=1&q=adsl+bit+swapping

Bro still the User name and pass are wrong I have he UTStarcom UT-304r2

Edit: Found the pass and Username

 

[dinukap4]

This Is my Router Configurations

All Done now How can i see if my net speed has improved ?

 

[prasadana2]

well in this case speed does not improve but internet connecting speed is improved since it dont try to connect on other DSl bands... this way when u on the router it connects to the internet soon..