Thread: Disconnection problem

Hello friends,
This is my first post in this forum.I have taken a BSNL broadband connection about 6 months ago.At first it was working fine but I am facing a problem for 1 or 1/2 week.Broadband is frequently disconnected when I am surfing any page and specially downloading something,and once it happens I can't never able to reconnect broadband until I wait for 10-15 minutes.Even after making sure that the link is stable,when I try to reconnect,suddenly it blinks up and I cannot connect to broadband.Even though somehow I can able to connect but it disconnects again after some time.I have to delete all the downloading data or files showing downloading error due to disconnection of broadband.Now I am short of confident to download large files from non resumable links as I am not sure if the file will download successfully or not.I am a newbie,don't know what to to,please guys suggest me what should I do?



OS-windows 7 ultimate(x86)
modem-SIEMENS C2110
BSNL Plan-500 C


Also wishing a VERY HAPPY NEW YEAR 2010 to the members of the forum.

Happy New Year

Please post your snr and attenuation values.

Originally Posted by meetdilip

Happy New Year

Please post your snr and attenuation values.

I think,you are asking for this.


System Information
Equipment Vendor DSL MODEM
Model Number DSL
Firmware Version V55.1.04.10
DSL Firmware Version E.37.9.32
Serial Number 00085CC21547
System Up time 00:53:49s

Internet Connection
DSL Status true
Last Failed 0x00000000
Downstream Data Rate 8128000
Upstream Data Rate 864000
SNR (Downstream) 18.5 dB
SNR (Upstream) 12 dB
Line Attentuation(Downstream) 5.5 dB
Line Attentuation(Upstream) 6.0 dB
Connected Standard G.Dmt

>>>I am short of confident to download large files

are these media files ? choose torrents and avoid http links for large files .

Originally Posted by andromeda

>>>I am short of confident to download large files

are these media files ? choose torrents and avoid http links for large files .

exactly!I am downloading DVD image file(11GB) of a game using torrent client from demonoid.com.But as I am facing trouble with my net connection,I am pretty much i doubt about completion of my download.

Please guys help needed....

sadly,you can do nothing to fix this prob.this is entirely the connection problem.i also faced the same & when i lodged a complain they(the bsnl) just told me that itz a technikl problm which they can not solve......

oh nooo.but I need to know somwthing,what is SNR (Downstream) and Line Attentuation(Downstream) ?currently my SNR (Downstream) is 7 DB,what does it stands for?

@gourab

If SNR is 7 db, your line conditions are poor.
Above 10 db minimum required. Higher the better.
In your Modem C2110 check these and also report ATTN ( should be low above 30 db poor. )
and Mod mode selected.

Theoretical discussion , please see
"Broadband How to >>." forum for Guides by
@Just4kix.

C2110 ADSL MODEM (Type-A) MENU

http://www.indiabroadband.net/attach...etter-hgjk.jpg

Originally Posted by gourab

oh nooo.but I need to know somwthing,what is SNR (Downstream) and Line Attentuation(Downstream) ?currently my SNR (Downstream) is 7 DB,what does it stands for?

Check this thread. Its very informative.

http://www.indiabroadband.net/broadb...they-mean.html (SNR Margin and Line Attenuation - What do they mean?)

Originally Posted by essbebe

@gourab

If SNR is 7 db, your line conditions are poor.
Above 10 db minimum required. Higher the better.
In your Modem C2110 check these and also report ATTN ( should be low above 30 db poor. )
and Mod mode selected.

Theoretical discussion , please see
"Broadband How to >>." forum for Guides by
@Just4kix.

C2110 ADSL MODEM (Type-A) MENU

http://www.indiabroadband.net/attach...etter-hgjk.jpg

Yes, his line condition is very poor. If it would have been marginal 7 dB (SNR Margin), then it could be ok. But its only SNR.

now its showing 16 db,is it varying all time? but still very poor i think.

What BSNL can do for me? how can they solve this problem?

Is there any way to increase SNR margin? if yes,then how to increase it?

Originally Posted by gourab

now its showing 16 db,is it varying all time? but still very poor i think.

What BSNL can do for me? how can they solve this problem?

Is there any way to increase SNR margin? if yes,then how to increase it?

dial 198 and post a complaint. tell them router DSL light goes off every now and then. then they are bound to check line and most of the issues are in Line only.

Signal to Noise Ratio (SNR)

The SNR should be higher than 20 though anything above 10 is just enough. The Attenuation should be as low as possible. But if the attenuation starts going higher than 40 and SNR going down below 10, it is time to complain about the line condition to BSNL.

Check the Wires

The leading-in cable (drop wire) from the junction box (DP box) to your house should be as straight as possible, should be of a single length without any joints. The wires should not be coiled anywhere and should be away from electrical lines. With these types of irregularities, i.e with joints or coiled or near power cables, your phone might work fine but the DSL link may not hold and work satisfactorily.

Splitters and Parallel telephones

Never by-pass the splitter. The splitter does the job of separating the high frequency ADSL signals from low frequency telephone signals. If the splitter is not installed correctly, the broadband connection is likely to go down every time the phone rings. Any parallel phone connections should be after the splitter and not before it. The line from the exchange should first enter into the splitter’s Line jack. The phone should be connected only to the phone jack of the splitter. The ADSL modem should be connected to the modem/DSD jack of the splitter. A two way jack may be connected to this phone jack to install your parallel telephones. The wire leading into the modem should not be running parallel or close to electrical wiring.

Originally Posted by deepmohan

Signal to Noise Ratio (SNR)

The SNR should be higher than 20 though anything above 10 is just enough. The Attenuation should be as low as possible. But if the attenuation starts going higher than 40 and SNR going down below 10, it is time to complain about the line condition to BSNL.

Check the Wires

The leading-in cable (drop wire) from the junction box (DP box) to your house should be as straight as possible, should be of a single length without any joints. The wires should not be coiled anywhere and should be away from electrical lines. With these types of irregularities, i.e with joints or coiled or near power cables, your phone might work fine but the DSL link may not hold and work satisfactorily.

The excess leading-in cable from the junction box and the wire between splitter and DSL is coiled up in my room.Is that why the SNR is below 10?how to get rid of the extra part of the leading-in cable?

Originally Posted by gourab

The excess leading-in cable from the junction box and the wire between splitter and DSL is coiled up in my room.Is that why the SNR is below 10?how to get rid of the extra part of the leading-in cable?

Well that too varies, it wont make any difference or much if the coiled cable is very little. you can give a try by just uncoiling the cables and making it straight and then check your line values for any variation.

From the BSNL telephone Box ( PORT) to your computer system , use the shortest RJ11 cable to the Adsl splitter.
From ADSL Modem Port same way short wire.
You will get these Rj11 ( twin wire telephone cable) cables with connectors at either end from electrical shops.
Keep the length 1 meter, or the minimum length required in you room.

Reduce the length of the coiled wire. Keep the rj11 connector at one end to ADSL splitter
( usually sealed ). Remove the other Rj11 connector at other end and connect to the Junction box.
You may get a mild shock if you touch one of the junctions.
(as about 40 to 60 V D.C is present.)
Inspect the wires connectors.. Blackening/oxidisation etc will reduce your Data signal.

Reported to BSNL,they asked me to bring the ADSL for checking.

Hello friends,now the broadband is working well!!!!
I did not complain any thing to BSNL but here's my ADSL status for last 4-5 days,my SNR downstream was soo poor(6 to 10 db).But now.....

System Information
Equipment Vendor DSL MODEM
Model Number DSL
Firmware Version V55.1.04.10
DSL Firmware Version E.37.9.32
Serial Number 00085CB3C92B
System Up time 00:13:22s

Internet Connection
DSL Status true
Last Failed 0x0000004b
Downstream Data Rate 1996500
Upstream Data Rate 861700
SNR (Downstream) 41.5 dB
SNR (Upstream) 11.5 dB
Line Attentuation(Downstream) 6.5 dB
Line Attentuation(Upstream) 4.5 dB
Connected Standard ADSL2

LAN Port
Mac Address 00:08:5C:B3:C9:2B
IP Address 192.168.1.1
DHCP server On
Subnet Mask 255.255.255.0

Status
ARP
DHCP
I don't know what happened but I don't have such kind of disconnection problem

Your SNR and attenuation values are excellent.

Are you having IPTV option now ?

In line having 2Mbps data rate there is no set up for IP TV

C2110
see this: Data rate unit not specified . may be bits.
http://www.indiabroadband.net/attach...e-better-1.jpg

Downstream Data Rate 1996500
Upstream Data Rate 861700

^^^ yea it's bits

No I don't have any IPTV option,I have the low SNR problem for last 1 year.SNR (Downstream) was near about 6 to 7 db,stability of the line was so poor that I was facing frequent disconnection problem every now and then.I complained to BSNL But they didn't take any action ,but last 5-6 days my ADSL stats showing those values.I just wonder how the problem solved without checking my line condition?suddenly my broadband works like a charm.

conversion of bits data
Please test speed here.
Airtel
Post results. screen shot not required.

1996500 bits
(informal notation: kilobyte = 1024 bytes)
bits 1996500
bytes 249562.5
kilobits 1949.70703125
kilobytes 243.71337890625
megabits 1.90401077270508
megabytes 0.238001346588135

Download speed = 1.61 mbps
Upload speed= 728 kbps,
Is it ok?