Sporadic connection on MTNL - aka disconnection blues

[shaunak]

Hi,

I have recently taken a MTNL connection. The connection keeps breaking often making it unusable.

At the best of times (night, early morning) I get these stats:

Downstream Upstream​

SNR Margin : 12.5 16.5 db
Line Attenuation : 41.0 28.8 db
Data Rate : 2048 260 kbps

But through out the day, the SNR margin drops to 6.4dB and near abouts.

The second a call comes in on the line, it disconnects. And it disconnects randomly throughout the day anyway.

My 7 year old cousin knows more than the the lady on the 1504 helpline. [Who kept saying "Modom" for some reason. ] So I guess I will get no help from MTNL.

I have tried everything to reduce the noise on the line. Minimum splitters, shorted wires. Right now I just have one phone and the router connected. Is there any thing I can do to salvage this connection?



Edit: Its 5 in the morning and my connection is already breaking.
Any body know the procedure for ending the connection?


One of these days, I am gonna shift to Latvia.

 

[Aspire]

I'm having the same problem!!!!
Need solution please.......................

DOWNSTREAM UPSTREAM
SNR Margin: 46.0 7.1 db
Line Attenuation: 22.0 16.3 db

 

[paroh]

Status with modulation ADSL 2 +

Download(SNR) Upload(SNR)
18-24db 11-13db

Speed

Download Upload
1152 1021

Status with modulation G.DMT

Download(SNR) Upload(SNR)
22-26db 11-13db

Download(SNR) Upload(SNR)
28-33db 7db

Speed

Download Upload
1152 960


As the speed increase the SNR also get low. and all of u know that the condition of mtnl line is not good. To get a stable connection ask them to reduce ur speed. As 2Mb is good speed but if u are not getting a stable connection than there is no use of 2Mb. I think u ask mtnl to reduce ur speed to 1Mb.

Note: U can try modulation G.DMT as on this modulation i am getting better stability of connection than ADSL 2+.

 

[ico]

^ thats completely wrong. With increase of speed SNR which stands for Signal to Noise Ratio doesn't get low. SNR is simply a ratio which depends on the quality of line.

Attenuation is the loss of signal over distance. The far you are form the exchange, the more attenuation you'll have. SNR should be high and Attenuation should be low for a perfect line.

Anyways, just ask for a rewiring if you want to get rid of the disconnections. Things like asking them to reduce speed will not work, imho.

Regarding modulation, I always keep it "Auto" the router itself chooses the best for itself. But from what I've heard, ADSL2+ is the one you must be using as ADSL2+ can maintain high speeds over low SNR. Low SNR on G.DMT which is a type ADSL modulation leads to disconnections.

---------- Post added at 07:33 AM ---------- Previous post was at 07:26 AM ----------

But through out the day, the SNR margin drops to 6.4dB and near abouts.

The second a call comes in on the line, it disconnects. And it disconnects randomly throughout the day anyway.

Just ask those MTNL idiots for a rewiring and pay them few bucks. And you SHOULD use a splitter if you aren't using.

And have you made more than 1 connection for the landline at your home?

---------- Post added at 07:41 AM ---------- Previous post was at 07:33 AM ----------

Here is my information:

--- System Information ---
Vendor: Linksys
ModelName: WAG54G2
Firmware Version: 1.00.17 , 2009-06-02T19:15:44
Boot Version: 1.03
Hardware Version: 0.01

--- DSL Information ---
DSL Driver Version:  E.25.41.39
DSL VPI/VCI:         0/32
DSL Status:          Showtime
DSL Mode:            ADSL2+
DSL Channel:         64
DSL Upstream Rate:   1021200
DSL Downstream Rate: 1145200

                      Down         up    
DSL Noise Margin:     8.0 dB      17.35 dB
DSL Attenuation:     29.0 dB      47.0 dB
DSL Transmit Power:  16.3 dBm      6.4 dBm

I've got very low Download SNR and very high Upload attenuation you see and I rarely get disconnected.

 

[paroh]

@ico i think u are using good adsl modem from a good company that is able to maintain a stable connection at even low SNR.
*www.pcurtis.com/network-adsl.htm

What max download and upload speed u are getting at 1mbps?

 

[ico]

@ico i think u are using good adsl modem from a good company that is able to maintain a stable connection at even low SNR.
*www.pcurtis.com/network-adsl.htm

Might be the case.

What max download and upload speed u are getting at 1mbps?

Upload speed: 109 KB/Sec, Time remaining: 0:07 minutes

 

[Aspire]

^This is not a discussion about ico'ss upload speed!!!!
Need some solutions please for this frequent disconnection.........................

BTW I do use a splitter and am using 2 phones on the telephone line.
and my speed is 512!!!!!!!

 

[ico]

^^^ if using two fones, then setup should always be like this:

*img716.imageshack.us/img716/6383/aspirin.png
The ADSL signal should be filtered BEFORE you make the connections for two fones.

 

[thewisecrab]

^^
Nice paintjob

 

[Aspire]

^Hmmm I'll try that!
Thanks

 

[NoasArcAngel]

next time someone says modom on the phone... tell them condom mein problem aa rahi hai... for some reason the lights on the condom are not working.... what to do ? should i reconnect the condom ?