Thread: Frequent disconnection

Originally Posted by meetdilip

Please try these values

IP - 192.168.1.2

Subnet mask - 255.255.255.0

Default gateway -192.168.1.1

Screen shots and procedure here

indiabroadband.net/broadband-how/17039-how-repair-limited-no-connectivity.html]How to repair - Limited or No connectivity

Thanks Dilip.
I have no issue with the connectivity as such and I already have opendns and universal dns entries at higher priority than bsnl. But the values you see in the log are from the router which I have not changed yet.

Originally Posted by harisk

...
But anyhow your DS Line Attenuation : 39 is pretty high. I guess there is definitely some problem in the line.

Weird stuff. At the moment, my US/DS margins are 7/13, DS/US Attenuation 40/22; and the connection is stable for quite sometime!!!!

Btw, are the US/DS margins same as SNR? I ask because a different router on the same line showed something like 25+ SNR but this one has no SNR values displayed. The US/DS margins are much smaller values as you see.

Originally Posted by essbebe

@Glass

In WAn or LAN settings page change to 1492.
if no improvement try lower numbers upto 1400.
Feedback please.

The router setting is actually at 1492, I don't know why the log says 1500 - maybe it starts trying that?

Originally Posted by superprash2003

strange , inspite of all that , your SNR is still 8 which is pretty low. that could well be your problem

SNR = Margin?

UPDATE:
Just got disconnected and reconnected. The vales are:

Modem Status
Connection Status Connected
Us Rate (Kbps) 160
Ds Rate (Kbps) 1472
US Margin 8
DS Margin 1
Modulation GDMT
LOS Errors 0
DS Line Attenuation 42
US Line Attenuation 22
Path Mode Interleaved

Is this a definite line fault or port fault?

i think it is..

Originally Posted by superprash2003

i think it is..

Line or Port?
I ask becase the BSNL guys have no knowledge and will keep interchanging on trial and error. If I know the exact point of failure, I will catch hold of the concerned person and get it done. Thanks!

Originally Posted by Glass

SNR = Margin?

DS margin = SNR - minimum SNR for operation (in most cases 6 db)

between have you tried setting modem modulation to ADSL2+.. ? can the modem sync with DSLAM... I was not able to ... I think you have the same issue as mine.. When i had this issue i sent emails to broadband SDE in my area with a CC to AGM PG ... PG cell called me to inquire...

sorry,

please keep your problems exclusive, yet short, so that ppl dont get bored watching the full length of the qoute..

sorry,

please keep your problems exclusive, yet short, so that ppl dont get bored watching the full length of the qoute..

Originally Posted by harisk

between have you tried setting modem modulation to ADSL2+.. ? can the modem sync with DSLAM... I was not able to ... I think you have the same issue as mine.. When i had this issue i sent emails to broadband SDE in my area with a CC to AGM PG ... PG cell called me to inquire...

Yes, ADSL+ just gives a little lesser attenuation number (contrary to what I am reading), but the issue persists.
BSNL Kerala definitely is advanced! BSNL SDO guys here in Hyderabad don't have email ids, a few emails to senior officers bounced and there has been no response to the ones that went the nodal officers!

The update however is that I went to the DE with a written complaint and a printout of my SNR and attenuation numbers I compiled yesterday from the router. Though they did not seem to understand the numbers, they now admit that the cables in my area had issues and will try to find a better pair. All the while they were insisting that there is no line noise and hence the line is perfect! :angry:

That seems to be the problem with your connection. The pair of cables that is provided to you is not perfect. I too had the same problem with about 6 months. After following up the issue with BSNL for a long time, I gave up. I was about to change over to Airtel. Then I met a BSNL employee in cable section. He told me that the problem is because the pair of cable is faulty. He met the line man of my area, I gave him some $$, he spent about 5 hours finding a good pair of cable and finally I got a good pair and no problem with my connection since then. Your problem seems to be due to faulty pair of cables. If you can catch hold of the lineman, he can solve your problem.

Originally Posted by royjose

That seems to be the problem with your connection. The pair of cables that is provided to you is not perfect. I too had the same problem with about 6 months. After following up the issue with BSNL for a long time, I gave up. I was about to change over to Airtel. Then I met a BSNL employee in cable section. He told me that the problem is because the pair of cable is faulty. He met the line man of my area, I gave him some $$, he spent about 5 hours finding a good pair of cable and finally I got a good pair and no problem with my connection since then. Your problem seems to be due to faulty pair of cables. If you can catch hold of the lineman, he can solve your problem.

Thanks royjose. I am doing that now, but I am told the lines in my area are pretty bad and it may not be easy to find a good pair, thanks to municipal diggings etc. I will continue to put some pressure over the next few days but I don't know if it will work!

Originally Posted by Glass

Thanks royjose. I am doing that now, but I am told the lines in my area are pretty bad and it may not be easy to find a good pair, thanks to municipal diggings etc. I will continue to put some pressure over the next few days but I don't know if it will work!

all public service groups claim that they are working develomental works for public good. most of them lack inter departmental disciplines and responsibilities.
Finally the public face the wrath
in case of any service, once a break is there, joint is a joint after a fracture.

i'd say line problem

Hello,

I have Home UL 500 plan.
My modem is UT300R2U.

My problem is similar to trackers_2008's problem.
"Problem: Frequent disconnection ; Please suggest solution"

I tried all solutions mentioned in the post.
I called exchange people n requested them change old wire to cable.
I connected telephone line directly to modem.
No use, problem continues...

Can anyone help?

I have the similar problem that no more troubles me.

What I did was
1. Installed new wire from Modem to Splitter (Rs.30)
2. Changed Modem's power plug from normal Plug Board to UPS ( a little fraction of power fluctuation might restart your Modem )

That's it, MY problem gone

Here are my SNR values

SNR (Downstream) 8.0 dB
SNR (Upstream) 13.5 dB
Line Attentuation(Downstream) 25.0 dB
Line Attentuation(Upstream) 12.0 dB
Connected Standard ADSL2+

i ahve same problem frequent disconnect
i hav change everything related to internet
plz suggest me

http://www.indiabroadband.net/bsnl-b...html#post83344

Post snr/attn mod selected data.

Try Mod GDMT. Annex M disabled. Bitswap enabled.
(DSL page )
http://i19.tinypic.com/6kqygzt.jpg


Also under management
or ( Maintenence )
check Client tr_069 is disabled ( if seen ).

Originally Posted by trackers_2008

I get a popup at the system tray indicating the network is disconnected and subsequently reconnected.

Do you get a popup like this in your system tray when internet gets disconnected?

Update guys, my problem seems to be fixed. I got three lines changed in the last few days and seem to have zeroed in on a good one; I waited and tested each line and got them to change to the next. I don't think BSNL meters are as good as the modem/router statistics.

A few tips for anyone dealing with BSNL:

1. Be armed to prove that it is a technical problem, since BSNL staff will promptly deny it is a line problem, citing no audible noise
2. Have your service records and SNR numbers handy and tell them this is a line problem
3. Make written complaints - not that they work
4. Don't go upwards to escalate; go downward to the lineman. Better spend a hundred rupee note than hours wasted with irresponsible officers
5. If your router has a page called Modem test, check for successful test. My test results a success now, and never before though the SNRs were good on bad lines at times. I think that is a good indicator of the line quality.

Thanks for your help, and anyone has questions on the above feel free to PM me.
Cheers.

Nice to hear that.

im using a WRT54G2.............its the new model frm Linksys..........
and ive been having frequent disconnection lately, fr abt a week.......
my modulation is set to ADSL2+
my
Downstream Rate: 2045 kbps
Upstream Rate: 861 kbps

any way i can prevent it from disconnecting?

Originally Posted by supershane4141

im using a WRT54G2.............its the new model frm Linksys..........
and ive been having frequent disconnection lately, fr abt a week.......
my modulation is set to ADSL2+
my
Downstream Rate: 2045 kbps
Upstream Rate: 861 kbps

any way i can prevent it from disconnecting?

If you would like to go my route, monitor the SNR numbers for a period of time; especially at the time of frequent disconnections. How high are they and how consistent are they? Try GDMT modulation as suggested by many on this forum.

I figure the rates don't mean much unless they are stable. Do post how the SNR margins are varying over time.

Hi all,
I am having a Home 500 c connection at my home in Ramprashtha, Ghaziabad.
From last one month i am facing a strange link failure problem. Earlier there was noise in the line, so i get it repaired with the line man. Now the noise problem is no more, but even now the link is severely unstable. And if it starts blinking, it can't come to steady state.
I checked the line with multimeter, the values were 56v dc, and 118v ac, but the strange thing is if the alter the probe of multimeter, the dc is showing negative values, but the ac part is showing 0v. i dont know what the exact values should be.

DC AC
-------------
+56v +118v
-56v 0v
-------------------------
SNR (Downstream) 27.0 dB
SNR (Upstream) 6 dB
Line Attentuation(Downstream) 46.5 dB
Line Attentuation(Upstream) 28.5 dB
Connected Standard G.Dmt
------------------------------------
Modem: Nokia-siemens c2110

whenever the link fails i change the polarity of the exch. line, and it starts working, but sooner or later this trick also fails, and if again i alter the line polarity it again starts working. This behavior is very strange.
bsnl personnels are crap.
Please suggest something.

Line polarity have no issue with the performance of equipment bcoz A polarity guard (Bridge rectifier) is inbuilt with all modems and telephones. Check your wiring, splitter.

@debojitk
-Modem: Nokia-siemens c2110
1.

SNR (Downstream) 27.0 dB
SNR (Upstream) 6 dB
Line Attentuation(Downstream) 46.5 dB

While SNR is good,

2.Attenuation is bad indicating line problems

3.Did you use a Digital Multi meter ?
TEST
(a)with telephone hand set in cradle : NO AC
(b) with telephone handset OFF the cradle NO AC
(c) when the phone rings. AC present.

4.Isolate phone lines if running parallel to house wiring.
4a: How many phones are used ?

5. Test for AC voltages in telephone Junction point with Mains OFF in the house.
Or
IF circuit breakers are available test, which line
Induces AC in Phone line.

6. EXPLANATION

A telephone line may be considered to be a source of some 50/60V volts DC with a source impedance of about 1 kilo-ohm.
During ringing, in place of DC,
an AC voltage of 70 to 80 volts (at 17 to 25 Hz) is present across the telephone line.

When the subscriber lifts the handset,
the same is sensed by the telephone exchange and the ringing AC voltage is disconnected and DC is reconnected to the line.

Lifting of the handset from the telephone cradle results in shunting of the line’s two wires by low impedance of the telephone instrument.

As a result, 50V DC level drops to about 12 volts across the telephone instrument. During conversation, the audio gets superimposed on this DC voltage.

7.
Check :connection:
Telephone line Rj11 ===>>>LINEIN ADSL splitter
PHone Port :====rj11====> all phones.
Modem port=====>>>rj11 to modem.

7a. Check for corroded contacts, blackening/ of .
connector points.


8. RECHECK SNR/ATTN .

9. Feedback.

.

like many others in this forum i got disconnection problems. made a complaint but still no response. checked the snr and attenuation but they are good.
screenshot:
ImageShack© - Gallery

You can search the forum for many threads/posts regarding this.
Check this: http://www.indiabroadband.net/bsnl-b...tml#post148009 (Unstable internet connection.)

Just as essbebe said, check your connections.

Originally Posted by dhaneshv

1) If you are having any disturbances along with the dial tone, then you will have to "check your lines for faults". Just complain in your local telephone exchange about the problem, and they will check to see if there is any faults with any of the lines, and will replace them if necessary.

2) All other devices like fax machine or other telephone sets must be connected after the splitter.

How to connect parallels after the splitter:


3) Disconnect all other devices that are connected to your phone line so that your modem is the only device connected to the phone line (via an ADSL splitter). Reboot and retry connecting.
4) If nothing solves your problem, connect the modem directly to the phone rosette (refer to the above picture if you are unaware what it is), to test if the splitter is having any problem.