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8 posts

Wannabe Geek


Topic # 145394 16-May-2014 19:44
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Hello

I switched to VDSL today but I'm experiencing slow connection: 18Mbps DL / 7Mbps UL.

I have a Draytek Vigor 130 and I'm plugged directly to it. 





I've read this post http://www.geekzone.co.nz/forums.asp?topicid=105744  but I confess I didn't understand much. I live in an apartment so I don't know the distance to the cabinet or any details on the wiring. The plug in my apartment is a RJ45 and I'm using two adapters (one RJ45 to the british telephone jack and another from the british jack to RJ11), so this is the only source of attenuation I have access to.

Basically I want to know 2 things:

1 - Which are the variables I should verify to detect the source of my problem and what values I should expect them to be? Is it the SRN? Mine is 12, what it should be?

2 - Are there any settings in the router/modem that I could change to make a difference or is this purely a physical connection problem?

Thank you!

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  Reply # 1046544 16-May-2014 19:55
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Did you have an ISP-supplied modem to compare with? It's possible that that's just as good as your line gets. That said, the DV130 in my experience is more interested in a stable connection than fast, and mine consistently synced lower than the TG589vn or DSL-N66U.




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  Reply # 1046547 16-May-2014 19:58
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get a RJ45-RJ11 cable

SNR is where it should be

not much you can do except wait for 10 days and let DLM do its thing

your speed is still better than ADSL

 
 
 
 




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Wannabe Geek


  Reply # 1046554 16-May-2014 20:02
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No, I don't have any other device to compare with.


Jase, do you think having an additional connector would slow down the speed much?

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  Reply # 1046556 16-May-2014 20:08
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Cabling won't make any difference unless we're talking a very long flat cable which are horrible for noise.

It's quite possible that simply is the speed available at your premises. VDSL2 isn't magic and won't deliver 70Mbps to everybody!



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  Reply # 1046572 16-May-2014 20:18
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Just plug the RJ11 straight in to the RJ45. They still fit. Probably won't make of a difference but you never know.

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  Reply # 1046582 16-May-2014 20:27
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chevrolux: Just plug the RJ11 straight in to the RJ45. They still fit. Probably won't make of a difference but you never know.


No, never do that.  The RJ11 plug damages the RJ45 socket. 

Just buy the RJ11 - RJ45 cable, I think the last one cost me $2.



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Wannabe Geek


  Reply # 1046613 16-May-2014 20:32
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Should I expect a lot of change from the DLM magic?

Is there a way to find other users near where I live to compare rates? I live at Auckland CBD, more precisely on Queen St.

I know VDSL2 is highly susceptible to distance and noise, but 18 is pretty meh. I was getting 12 with ADSL, what a lack of lucky :)


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  Reply # 1046618 16-May-2014 20:40
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but you were only getting >1mbps upload on ADSL

you havent shown us your downstream attenuation, that tells the biggest story

you may need to telnet into your modem to get that figure

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  Reply # 1046634 16-May-2014 20:51
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The one important stat that isn't in the screenshot it's the line attenuation. It's measured in dB, and I've guess that yours is somewhere around 20dB based on that sync speed.

There are a few things that will affect you speed:
* The distance between you apartment building and the exchange/cabinet.
* The quality of the writing in your apartment building.
* Your adapter setup for the connection to the wall.

As others have mentioned, using adapters is a bad idea as the extra connections are a potential source of line noise. A proper cable will eliminate this, and you may well see an improvement in speed. The other bits are sadly out of your control.

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  Reply # 1046635 16-May-2014 20:51
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Could you post the line attenuation stats?

I'd be very happy with those sorts of speeds. My line only does 20/3.5mb. :(



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Wannabe Geek


  Reply # 1046690 16-May-2014 21:43
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I'd love to post the attenuation stats. Does anyone know how to get it from the Draytek Vigor 130?
I'm able to telnet to it but I don't know what command to use.

Will google more on how to do this, will post the results as soon as I get them.

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  Reply # 1046694 16-May-2014 21:48
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try

xdsl info expand=enabled



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Wannabe Geek


  Reply # 1046763 16-May-2014 23:40
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That's what I got:


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  Reply # 1046820 17-May-2014 08:57
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According to that, you've got 16dB attenuation. I get 35Mbps with 12dB, so your speed is a bit below what I would expect.

When you've got a proper RJ11 to RJ45 cable in place, post your results back here. You should be able to get speeds up into the mid-20s Mbps with your attenuation, and those adapters are not helping the situation one bit.

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  Reply # 1046828 17-May-2014 09:24
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robertosc: Should I expect a lot of change from the DLM magic?

Is there a way to find other users near where I live to compare rates? I live at Auckland CBD, more precisely on Queen St.

I know VDSL2 is highly susceptible to distance and noise, but 18 is pretty meh. I was getting 12 with ADSL, what a lack of lucky :)



12 is very poor for ADSL2+, if you were only getting that I'm surprised you're getting 18Mbps with VDSL2.

DLM will not make any difference.



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