Speed not matching the attenuation

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alexakis99

alexakis99

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Dec 2, 2012
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Hello guys,
i live in greece and i have an adsl 2(+) up to 24 mbps connection.
I get different speeds depending on the wall jack i use.I have posted it in a greek forum and they said to isolate all the other connection's through the main wall jack so i did.
My maximum speed was 10666 kbps when i isolate the connections.In some jacks i get always 10100 kbps and in some(which i am forced to use due to wifi coverage) is between 7770-8200 kbps depending on how much will the router get when its reset or what the snr is(after 1 day it drops to 9-10 from 11.5).
My attenuation is 33.3db when i use it on a isolated jack and 34.7 when i use it normally.My guess is that the wiring in some point is not made properly or something.
However i still shouldnt be having that speeds.I should be getting 12-14mbps.Please tell me reasons that might make this happen and any way i can test it to see what's happening.
Worth mentioning is that two wall jacks seem to be the "main"ones seem they have more than one connection.I have tested on both.
I am using the ISP's modem/router NetFaster IAD 2 PSTN
Here are some pic's
The one using the isolated wall jack
GRhJU3P.png

and here without using
beIap0x.png
 
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bill001g

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Aug 9, 2012
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Been a while since I had a dsl connection. There used to be calculators that you could plug in the attenuation and noise numbers and it would tell you if you were getting good rates. I know that the noise number has a impact but I do not know if there is much you can do to change it. At the moment I am too lazy to go re learn how these calculations are made I remember it made my head hurt the first time. I know most people want to get that number to 6 if possible.
 
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BuddhaSkoota

BuddhaSkoota

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Aug 16, 2014
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When you isolate the main jack, are you able to completely remove the wiring to the other jacks? The best way to test your service is to eliminate all of your home's wiring by testing your modem at the point where the service enters the home. Usually this is a service box with a test jack on the inside. This will give you the actual speed your service is capable of providing.

DSL works best when the signal runs only to one jack designated for service. If you prefer to be able to use the modem at different jacks, then the problems will be unavoidable.

If you can keep the modem in one spot, then you should be able to improve the service, possibly significantly. It may not be difficult to run a separate line from the service point, or use a different pair of wires that might be available on the existing wiring.

If testing at the service point yields significantly better speeds, you may want to strongly consider having the wiring altered to provide the best possible signal to your modem.
 
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alexakis99

alexakis99

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Dec 2, 2012
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Hi,
when i opened the first main jack it had 2 blue cables and 2 whites.The two blue were conjoined together into one "hole",the same as the whites.So i removed all the cables and i made sure to test combinations of 1 blue and 1 white until i get a connection.So,i think i removed the rest jacks,if not then i dont think it has another way.I went and checked the box outside the house if it had a testing jack but i couldnt find any,it only had wires going to the house.The box is exactly behind the wall jack.Although the place where it is placed is quite questionable.The cable comes from a ,how do we call it,a wooden antenna?a piece of wood which is tall and transfer the cable to the houses.What i wanted to say is that the cable goes to the front of my house and is glued on the roof and goes in the back of the house which is the main jack.
 
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