ADSL 2+ is here

[Harvik780]

[Charan]

its showing the same for me .. but downstream is still 2048

[Harvik780]

^^This picture is from my brothers modem.I still have ADSL 1.Don't know why haven't they ugraded me to ADSL 2+.

[Charan]

^^ you guys got two seperate Dataone lines :O .. both are 2MBPS?

[Harvik780]

^^Yes

[QwertyManiac]

Your SNR is very low, how are you even connected

[Harvik780]

^^My brother's line will stabilize in a few days..lemme see if it does...well one of the features of ADSL 2+ is that it can maintain high speeds at low SNR.

[gary4gar]

its not here till date
which city are you in?

[indian_samosa]

Dude I think the modem syncs with the dslam and uses whichever modulation it wants.As I have seen sometimes it shows T1 or G.dmt ....right now I have disabled all except the adsl2+ ...and its now using that modulation.





On other note ... my friend/neighbour has a different type of modem and his download shows 11000+ kbps and his download snr is like 6 or something... and he gets exactly 2 Mbps (256KBps) on his line.

[gary4gar]

Please quote your city name also

[indian_samosa]

I was implying that its nothing new what harvik is talking about ..

[cool_techie_tvm]

No big deal yaar, i guess anyone on Dataone can set their ADSL mode to ADSL 2+. But the but disturbing fact is the 8190 downstream speed as seen on the first screenie. Have they started upgrading subscribers to 8mbps?? What speed are u getting Harvik780 ?

[Cyrus_the_virus]

@Harvick, just to let you know, ADSL2+ has been here for a long time now. The connection on which BSNL is providing 2Mbps on is ADSL2+. ADSL2+ has a theoretical speed of upto 24Mbps. It's been just limited to 2Mbps due to low bandwidth infrastructure. Ever since BSNL has been providing broadband, it has been using ADSL2+ with DMT modulation.

[a_k_s_h_a_y]

My DSL Modem Status

Status SHOWTIME
Mode ADSL2+
Type

Downstream Upstream
Rate (Kbps) 2045 510
SNR Margin (dB) 8.6 17.4
Attenuation (dB) 34.0 16.0
Output Power (dBm) 11.4 0.0
Super Frames 402255 402253
Super Frame Errors 53 0

now what does this mean ??

how do i port forward my modem for faster torrent download .. anyone ?? any links ??

[Harvik780]

Originally Posted by Cyrus_the_virus

@Harvick, just to let you know, ADSL2+ has been here for a long time now. The connection on which BSNL is providing 2Mbps on is ADSL2+. ADSL2+ has a theoretical speed of upto 24Mbps. It's been just limited to 2Mbps due to low bandwidth infrastructure. Ever since BSNL has been providing broadband, it has been using ADSL2+ with DMT modulation.

Then why am i not able to set my modem modulation to any other than G.Dmt and G.Lite.
Both me and my brother have the same modem.

[gary4gar]

Originally Posted by Harvik780

Then why am i not able to set my modem modulation to any other than G.Dmt and G.Lite.
Both me and my brother have the same modem.

same case here

Modem Status
	
Connection Status 	  	Connected
Us Rate (Kbps) 	  	512
Ds Rate (Kbps) 	  	2048
US Margin 	  	26
DS Margin 	  	22
Trained Modulation 	  	ADSL_G.dmt
LOS Errors 	  	0
DS Line Attenuation 	  	33
US Line Attenuation 	  	22
Peak Cell Rate 	  	1207 cells per sec
CRC Rx Fast 	  	0
CRC Tx Fast 	  	0
CRC Rx Interleaved 	  	0
CRC Tx Interleaved 	  	1
Path Mode 	  	Interleaved

ps thanks for pm

[cool_techie_tvm]

Guys try the following link to estimate the possible downstream speeds u can achieve in an ADSL connection.

http://212.23.23.177/ADSL/default.aspx

[Harvik780]

Originally Posted by cool_techie_tvm

Guys try the following link to estimate the possible downstream speeds u can achieve in an ADSL connection.

http://212.23.23.177/ADSL/default.aspx

Got 7.15Mb/s on ADSL1 and 16Mb/sec for ADSL2+ for me.
7Mb/s on ADSL1 and 16/sec for ADSL2+ for my brother.

[gary4gar]

We estimate that if using a rate adaptive up to 8Mbps service your maximum line speed will be:6603Kbps

If you are on a Max product, that uses the IP Profile system (sometimes called BRAS Data Rate) if you maintain the above line speed for 3 days or more your IP Profile would be set to: 5.5Mbps

If your service provider uses ADSL2+ we estimate you may manage line speeds of:14972Kbps
With ADSL2+ the maximum IP throughput is likely to be around:13250Kbps

i used
Current Line Sync (connection) speed in Kilo bits per second (Kbps):2048
Downstream Line Attenuation (dB) : 33
Noise Margin, sometimes referred to as Signal to Noise Ratio (SNR) 22

i hope i used correct values

[Charan]

We estimate that if using a rate adaptive up to 8Mbps service your maximum line speed will be: 8128Kbps

If you are on a Max product, that uses the IP Profile system (sometimes called BRAS Data Rate) if you maintain the above line speed for 3 days or more your IP Profile would be set to: 7.15Mbps

If your service provider uses ADSL2+ we estimate you may manage line speeds of: 15650Kbps
With ADSL2+ the maximum IP throughput is likely to be around: 13850Kbps

Current Line Sync (connection) speed in Kilo bits per second (Kbps)2046

Downstream Line Attenuation (dB)32

Noise Margin, sometimes referred to as Signal to Noise Ratio (SNR)31.5

[Harvik780]

[The_Devil_Himself]

hehe you all are lucky dawgs

MTNL upgraded my speeds to 2046\256kbps(down\up) a few days ago,the connection wasn't stable,I complained a lot,they,instead of changing my line and doing other things,reduced my down speeds to 288kbps!!Thsi sux.Now I am surviving on 288kbps and you all are talking about 8mbps.I feel like killing MTNL.

[Cyrus_the_virus]

Originally Posted by Harvik780

Then why am i not able to set my modem modulation to any other than G.Dmt and G.Lite.
Both me and my brother have the same modem.

Can you refer back to my last post? It says that the modulation type used is DMT which includes G.Dmt. Whatever modulation your router uses should be compatible with the DSLAM modulation and BSNL's DSLAMs use DMT Modulation.

Originally Posted by cool_techie_tvm

Guys try the following link to estimate the possible downstream speeds u can achieve in an ADSL connection.

http://212.23.23.177/ADSL/default.aspx

Guys, please don't use this link. It's meant to estimate the speed for UK customers who are running the DSL MAX package which is rolled out by BT(British Telecom). Although you will get resuls if you put in values because it's just an estimate calculation tool, still, it's not meant for reference for those who are on BT's DSL MAX.

Once again, please don't be confused. ADSL 2+ has been the technology behind BSNL's broadband ever since it launched. It's not something new. The 8Mbps trials that are being carried out are on the same ADSL2+ technology. It's just that some modems will say ADSL while others will say ADSL2+.

[Harvik780]

Thanks but I have set my modulation to T1.413 for now.

[Ponmayilal]

I think that BSNL is shifting to Rate adaptive ADSL connections.
I opted to surrender the BSNL rented ADSL modem Huawei MT 800 since I have my own Netgear DG834G modem/router/accesspoint.By mistake (?????) the Commercial officer ordered disconnection of my Broadband connection. I had to live with it from 21 to 27th Nov, when finally the Broadband connection was restored after I made a hue and cry and sounded the top officials of BSNL on their negligent act. But ever since the connection was restored I have noted that my Netgear modem gives out the following statistics.

ADSL Link

Downstream

Upstream

Connection Speed

4902 kbps

509 kbps

Line Attenuation

51 db

13 db

Noise Margin

2 db

21 db

With my old connection the corresponding readings were more or less as follows
Connection speeds 2048Kbps/256 Kbps
Line attenuation 48db/28db
Noise margin 22db /22db
I was more concerned about the downstream noise margin which now varies from 0db to 10 db.(most of the time 6 db) At such low noise margin I expected that the connection would drop frequently but surprisingly the connection has never dropped during the last 36 hours since the new connection.The only thing I had observed is that the speeds are never consistent. Sometimes it drops to as low as 200Kbps but most of the time it is around 800Kbps.
Alarmed I made a quick websearch on 27th night itself and came to know about the MaxDSL. Here is the link http://www.kitz.co.uk/adsl/maxdsl2.htm
It is now quite obvious that BSNL is now changing over to the Rate adaptive MaxDSL which is just a variation of the ADSL2+. Low SNR margin is to be expected for this type of connection.I also understand that it takes about ten days for the ADSL system to stabilise and fix up the maximum possible download speed for the particular line.
Today the JTO visited my residence to collect the BSNL modem and I queried him on the very low SNR margin of the line. He had no clue whatsoever!!!!!!!

[The_Devil_Himself]

^^err...a very noobish question to you all--does the line itself determines the max. down speeds that it can sustain and then fix up on that?I mean my down speeds is now 288kbps(connection is very stable now) after about a week of having a very unstable 2mbps speeds.What can I do now except for calling dumba&&es over at MTNL callcanters(I don't trust MTNL at all,they're all incompetent)?

edit:will purchasing the abovesaid router help(over MTNL's default router,some crappy U2-304R2)?

[Cyrus_the_virus]

Originally Posted by Ponmayilal

I think that BSNL is shifting to Rate adaptive ADSL connections.
I opted to surrender the BSNL rented ADSL modem Huawei MT 800 since I have my own Netgear DG834G mode .................................................. .................. SL system to stabilise and fix up the maximum possible download speed for the particular line.
Today the JTO visited my residence to collect the BSNL modem and I queried him on the very low SNR margin of the line. He had no clue whatsoever!!!!!!!

BSNL is testing the 8Mbps service which is rate Adaptive but it's not going to be know by the name MaxDSL. That is the name of the product released by BT like the name Dataone that BSNL uses for it's broadband.

But when the connection means rate adaptive it doesn't mean that the connection speed will keep varying always. It's going to be adaptive only during the testing phase after which your speed will be fixed.

I guess it's better I write an article on how these things work to avoid confusion

Originally Posted by The_Devil_Himself

^^err...a very noobish question to you all--does the line itself determines the max. down speeds that it can sustain and then fix up on that?I mean my down speeds is now 288kbps(connection is very stable now) after about a week of having a very unstable 2mbps speeds.What can I do now except for calling dumba&&es over at MTNL callcanters(I don't trust MTNL at all,they're all incompetent)?

edit:will purchasing the abovesaid router help(over MTNL's default router,some crappy U2-304R2)?

Well, there are a million reasons why the connection can be unstable but yes, the line conditions do affect the maximum possible speed. Things like SNR and line attenuation play ver important roles in maximum possible speed.

[Ponmayilal]

^^Basically the maximum speed that you can get on your line in any ADSL connection depends upon the line( Its length from the exchange to your residence, its thickness responsible for signal attenuation and the noise present on it).Most service providers will deny an ADSL connection to you if they determine that your line cannot sustain the minimum assured speed or a reasonably good speed.While the distance and thickness of the line do not vary, the noise is a variable.In maxdsl , if you read the link provided , you may understand that the DSLAM at the exchange and your modem take into account the variations of noise level and fix the optimum speed for your particular line.Atleast that is what I understand

[Cyrus_the_virus]

Originally Posted by Ponmayilal

^^Basically the maximum speed that you can get on your line in any ADSL connection depends upon the line( Its length from the exchange to your residence, its thickness responsible for signal attenuation and the noise present on it).Most service providers will deny an ADSL connection to you if they determine that your line cannot sustain the minimum assured speed or a reasonably good speed.While the distance and thickness of the line do not vary, the noise is a variable.In maxdsl , if you read the link provided , you may understand that the DSLAM at the exchange and your modem take into account the variations of noise level and fix the optimum speed for your particular line.Atleast that is what I understand

Thanks for your concern but I'm already working with MaxDSL for several BT clients like Tiscali, Pipex, Thus and Demon. That is why I was asking if I needed to write an article on this since it seems like all the similar related technologies are coming to India.

[Ponmayilal]

@cyrus, my last post was more specifically to the devil himself. Glad to know that you work for Maxdsl.I had only given my observation that the speed right now keeps varying.But I have understood the process and have clearly mentioned that after the training period of ten days the speed may be fixed.At this point of time there is no specific name for the BSNL's rate adaptive technology used and so no harm if we call it by the only reference known at this point of time - MaxDSL . Going through this thread, you may appreciate that none had a clue about this rate adaptive ADSL technology and I had given all a reference article on MaxDSL and through that the working of the rate adaptive ADSL, specifically clearing the confusion regarding the low downstream noise margin. I myself was confused three days ago There is no need for any new articles if articles on the subject already exist. So you may give reference to such articles.BTW there is no more Dataone. Effective 01 Nov 2007 it is just BSNL Broadband