India Broadband Forum

veeru_007 · 10-28-08, 10:53 AM

Hello friends,

After a waiting time of 2 months I finally get my BB Home 500 Plan

,I just searched through the forum and found about SNR Margin and Line Attenuation by just4kix

,then I checked my ADSL line status it is Netgear DM111 modem,anyway what I found is these horrible values of ADSL line,take a look at attached screenshot

Please tell me friends what can I do for improving my BB speed

essbebe · 10-28-08, 12:46 PM

..1. you could change the mod mode to GDMT.
.....2.Ensure your phones are connected after the ADSL splitter.
......3. Check Phone line joints/ cables for corrosion/blackening/oxidization/etc
.........4. Call BSNL if stil no improvement for a a stable connection.
Probably you are far away from the exchange. confirm.

s_mitra · 10-28-08, 11:01 PM

Mr. Veeru,
Low SNR is not the prob of yours only. At the begining I also faced low SNR and high attenuation ( as low as 7 db local SNR and 9 db remote SNR.). I kept complaining to the SDE(Extrnl) of my Local BSNL exchange. I insisted to change the pair of loop, even to change the DP. I gave them the statistics in black and white. One of the major problem I faced, the frequent disconnection of the session in bridge mode. At last the JTO of the exchange, who looks after the BB paid the visit in my house and saw it. He made my Siemens modem c2110 to PPPoE mode after checking my log in sessions on BB portal Usage.

I suggest the following:
1. Keep insisting to change the pair of loop that connects your tele line.
2. Make a hold of the lineman if possible, who can satisfy yourself by changing the DP box faster than an officer.
3. Other than Metros, BSNL doesnot have ADSL tester. The Modem doesnot always show the correct statistics. Try to test with other Modem if possible.
I did in my case and that showed 1-2 db difference.
3. According to BSNL <15 db for local SNR is not suitable for BB. Although we know at 12 db we can do enough.

The values you showed resulted frquent disconn. that would be registered in your BB portal usage. Take a print out and show that to the BNSL Officer concerned

when faced the problem, many suggestion came. One them was to use "Connetion Booster". You can use that or Use "DSL speed" to Optimise MTU
Give a search in google for them.

Hope your effort will be achieved to success.

just4kix · 10-28-08, 11:39 PM

@s_mitra, Good sound suggestions. Repo point to you.

10-28-08, 11:01 PM	#3
s_mitra Junior Member Join Date: Jun 2008 Location: WestBengal Posts: 10 Rep Power: 2	Mr. Veeru, Low SNR is not the prob of yours only. At the begining I also faced low SNR and high attenuation ( as low as 7 db local SNR and 9 db remote SNR.). I kept complaining to the SDE(Extrnl) of my Local BSNL exchange. I insisted to change the pair of loop, even to change the DP. I gave them the statistics in black and white. One of the major problem I faced, the frequent disconnection of the session in bridge mode. At last the JTO of the exchange, who looks after the BB paid the visit in my house and saw it. He made my Siemens modem c2110 to PPPoE mode after checking my log in sessions on BB portal Usage. I suggest the following: 1. Keep insisting to change the pair of loop that connects your tele line. 2. Make a hold of the lineman if possible, who can satisfy yourself by changing the DP box faster than an officer. 3. Other than Metros, BSNL doesnot have ADSL tester. The Modem doesnot always show the correct statistics. Try to test with other Modem if possible. I did in my case and that showed 1-2 db difference. 3. According to BSNL <15 db for local SNR is not suitable for BB. Although we know at 12 db we can do enough. The values you showed resulted frquent disconn. that would be registered in your BB portal usage. Take a print out and show that to the BNSL Officer concerned when faced the problem, many suggestion came. One them was to use "Connetion Booster". You can use that or Use "DSL speed" to Optimise MTU Give a search in google for them. Hope your effort will be achieved to success. Last edited by s_mitra; 10-28-08 at 11:03 PM. Reason: spelling mistake

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Very BAD SNR Margin and Line Attenuation

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10-28-08, 12:46 PM	#2
essbebe Platinum Member Join Date: Aug 2007 Location: Chennai Posts: 4,240 Rep Power: 12	..1. you could change the mod mode to GDMT. .....2.Ensure your phones are connected after the ADSL splitter. ......3. Check Phone line joints/ cables for corrosion/blackening/oxidization/etc .........4. Call BSNL if stil no improvement for a a stable connection. Probably you are far away from the exchange. confirm.

10-28-08, 11:39 PM	#4
just4kix Platinum Member Join Date: Dec 2007 Location: Pune Posts: 8,899 Blog Entries: 6 Rep Power: 19	@s_mitra, Good sound suggestions. Repo point to you.