ADSL Modem connecting at unsual speeds

[Herath]

Besides the speed problem of ADSL, there is a new one. The router is connecting at strange speed. I tried changing the ADSL modulation to ADSL 2+, but it does not help. Currently I am using ADSL g.dmt. Please have a look at the screenshot. I tried googling, but could not find a cause. Although my line attenuation is high, I have been running on this like for about two years now.

http://www.tops.lk/article29702-slt-bro ... tions.html

I tried changing to ADSL 2+ since the about article stated that SLT is using ADSL 2+. But then router started showing an attenuation of 65dB.

Untitled.png (231.4 KiB) Viewed 9903 times

Could this be a problem at the telephone exchange? or could it be my router?. (I rarely unplug it, it is always plugged in unless otherwise there are thunder storms)

[Saman]

Hi Herath,

First thing we all need to agree is that Sri Lanka is experiencing a serious brain drain. Due to the previous war situation, almost all intelligent people of all ethnic groups had flown to west. The result was this situation now we all experience with the government sector. In simple terms all the incapable guys (including engineers) have entered to these vital development points and they simple mess the whole thing.

If you take every sector, this is true. Take lecturers in universities for example. Almost all these guys are the ones who got kicked off from foreign universities after completion of their PhDs. All the valuable guys are employed on the same universities after their PhDs. Take engineers in places like Railways, Telecom, Ports, Electricity, etc... 70% are NDT guys who later passed CIE (Chartered Engineers). 30% of the BSc Engineers are the guys who got worst results in the university. Tell me if you can find at least one guy with a 1st class or a 2nd class. This is the reality.

Most of the guys who claims that they have PhDs, have taken them even without writing a thesis. And recently we heard one popular figure has gained a PhD from a university which doesn't have a postal address but an email address. Some are having honourary PhDs. Everybody knows that there is no value of a PhD without a research topic and invention.

See what happens to our scientists? The guys with Physical science degrees. Those guys are trained to do research activities for the advancement of science in the country. But they are usually employed as management trainees. What a world is this?

Though the political situation is stabilized, it will take few more years to get everything back on track. Government is doing all possible things to stop the brain drain. Lets hope that will work soon.

Until then, we will experience so much of problems with these mad guys.

I will tell you one example. I called SLT since I experienced a continuous interruption of ADSL line. I asked them whether there is any common problem... Later another so called technician called me and said, they are going to send a team to check my line. I told that guy, there is no need to send a team, etc... And finally I had to tell them I'm so and so and I don't want you to teach me the subject I learned. I asked them to restart the router which my line is connected and due to my demand, he agreed. In about 5 minutes, everything got fixed. It was just a problem of an overloaded router and they couldn't even figure that out. If they send a team, guess how much people's money they burn?

That's just a background of government sector in our country. It is common to all sectors, not only telecom.

Now lets get back to your problem. Can you call 1243 and ask the guy what is ADSL 2+? I'm 99.9% sure he/she doesn't know anything other than ADSL. If so, ask a technician to call you who knows about it. I'm sure you'll never get a call. These guys buy those routers from tenders. Maximum commission, Cheapest quality. Guys are normally trained in foreign countries by spending millions of public money. And finally when they come back, they just know how to plug cables and terminal configuration. They don't know the technical side.

What I suggest here is, just revert back to original settings (if auto is available, put that) of the router until you get right information from SLT technicians. I'm a long term SLT ADSL customer and I didn't receive a letter/email regarding a technology shift which they should do. So jsut give a call and ask them on this. If you get some valuable information, don't forget to inform ROBOT.LK as well.

[Herath]

Hi,

Thanks for the long reply. I agree with you that most valuable people are out of the country. And friends at my university are now working as banking trainees and management trainees. Anyway, they never had interest in science. All they wanted was a degree to get in to a job with a good salary. On the other hand, I was not very interested in that physical science degree. So I have not still completed it. I have no interest in sitting on a desk and learning only theories all day. So attending university is the most bitter memory I have in my life, up to now.

I think you are talking about a ADSL port reset. But that will take lot of calls if not few. I don't want to waste time talking to a bunch of idiots who never wants to listen to someone else idea.

I did not buy this router from SLT. I bought it from a computer store at unity plaza. It is a D-Link DSL-2540T .

When I put the modem to ADSL2+ Multimode, router selects ADSL2+ Annex M. And When I put it in "Not Trained", it still automatically selects ADSL2+ Annex M. Currently I am running on G.dmt.

Don't know what to do. I will try resetting the router. Router is still connected at 576kbps/192kbps. I kept the router turned off last night, but situation is unaffected. I have a sense that this could be due to some modulation mismatch. But who knows. SLT Customer service is not the best place to call for technical assistance.

SLT now maintains a separate portal for broadband. All ISPs are required to do this by the TRCSL.Here is the link to the equipment configuration details page.

They have stated ADSL 2+ in modulation. But I am not sure if SLT has moved to ADSL 2+. I rather wish they won't abandon G.dmt. Since my Telephone line is very long, I won't be able to get a stable connection if SLT does not install a remote DSLAM which is not something to get my hopes high about.

[Herath]

I reset the router. No use

Tried using different modulations. It only connects at G.Dmt (ITU992.1) and ADSL2+ Annex M . When someother modulation is used, ADSL get disconnected.

Seems like something is really wrong. It is hard for me to find a another router to check my line and I will just wait and see.

[Saman]

I reset the router. No use

It is not the router in your end. I referred the router in at the SLT end. That's the one which normally gets overloaded which the resetting fixed my issue. I'm 90% sure that they don't use good brands like Cisco, D-Link, 3Com, etc... What the tenders do for them is maximum commission, cheapest quality . If they have used better ones, we would never have to complain them as such.

So just call them and report the problem. Whenever a technician calls you, ask him to reset the router which your cable is connected. Tell them you heard this work from someone who got himself fixed with a similar issue.

Another suggestion. Can you bypass the splitter and see whether all work? If this is the case, it can be lightning that blown your splitter.

If you use lighting arresters, check them too. If you don't use them for now, you better buy one from 1st cross street for a cheaper price. See these circuit diagrams if you like to build one by your own, https://robot.lk/viewtopic.php?f=73&t=2174.

[Herath]

I connected the router directly to the wall socket.Attenuation reduced by 1dB. But speed profile is still 576kbps/192kbps. It's an increase at least in numbers. So I will see a bit more before calling SLT.

Resetting my ADSL port will be hard. My local exchange does not have an engineer as I know. So it is hard to get something done. I had to call more than 5 times to get my telephone line connected to the DSLAM. Anyway I will try calling...

[Nipuna]

Hey Friend that isn't a Problem only you have.

I saw that on Elakiri.com and on Techkatha Google Group.

I think this is another Damn Work of SLT, According to my Thought I think Because of so much complaints they might increase the speed only in Numbers not in Real Speed. They always do silly things


But So many people have Your problem but I don't have it, I only have Slow Speed Problem for one and half month

[Herath]

ADSL is fast now. About 2x, 3x faster than day time. Should be due to low congestion. And this new speed profile for me... is this real.



50kbps more download/20kbps more upload

[Saman]

50kbps more download/20kbps more upload

You now have 490 kbps download / 150 kbps upload = 61.25 kBps download / 18.75 kBps upload
Is this means you had 440 kbps/130kbps earlier ?

[Herath]

Yes earlier i only got 0.44Mbps/0.10Mbps max . So it is a considerable amount of increase in upload bandwidth. Router still reports my upload as 192kbps. and download is 576kbps.