Slow ADSL internet speed

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youssef13

Feb 15, 2018
15
0
10
Hello,
I subscribed to an internet plan that gives up to 16mbps.
I'm only getting 2047kbps as downstream actual rate
The downstream attainable rate is 4920kbps
Downstream noise margin is 12.8 db
Downstream line attenuation is 23.2 db

JdOEuv3.jpg


I have two questions:
Firstly, Why I'm getting half of the attainable rate ? It seems like my line can hold 4mbps but I'm getting only 2mbps ?
Secondly, Why the attainable rate is low ?
Contacting ISP doesn't help.
 
Solution
clarkjd

Attainable rate is best case scenario, if EVERYTHING worked perfectly. Actual rate is what you get in the real world and EVERYTHING affects it.

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hang-the-9

hang-the-9

Titan
Mar 25, 2010
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What did the IPS say when you contacted them? For DSL there are a lot of factors that affect speed, how far away you are from the station, quality of wiring to the house, quality of wiring in the house, maybe something with one of the filters. Maybe a modem issue. I have know people with bad DSL connections that fought with their phone company to change the wiring to the house, or check it, and several times that fixes issues. In at least one case there was something on the pole, a filter or some wiring issue, that caused a weak DSL connection.

There are several questions like yours, going back several years with info about it. Just doe a web search for adsl attainable rate vs actual rate
 
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Y

youssef13

Feb 15, 2018
15
0
10


Thanks for your reply!

ISP customer service says that they can't do anything with the speed I'm receiving because their system is giving me the maximum speed my line can hold, but it's nonsense that my line can't receive more than 2mbps ( My line is fiber optic and not far from the exchange ).

I've already searched a lot, and what I understood is that quality of line affects the Attainable rate, but I see that the Attainable rate is much higher than the actual rate, so there is nothing to do with the quality of line ?
Please, Correct it if I'm wrong.
 
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SoggyTissue

SoggyTissue

Estimable
Jun 27, 2017
1,029
0
2,960
there is an isp dictated 'baud' rate the isp can fiddle with (which increases dl speed but also ups noise) which can make your connection unstable, so to reduce the amount of 'my net died' calls, they set it to a 99-100% connection uptime rate.

ask for an increase at your own peril.
 
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youssef13

Feb 15, 2018
15
0
10


I couldn't understand the technical information you said, but anyway customer service says they can't control my speed, I mean they can't increase my speed at my own responsibility.
 
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clarkjd

clarkjd

Splendid
Dec 7, 2005
6,486
34
28,490

Is your ISP also the owner of the Fiber connection to your house? If so, why are you still on ADSL? Most fiber internet connections are 4-10 times faster than ADSL.

 
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youssef13

Feb 15, 2018
15
0
10


Yes, The ISP is also the owner of the fiber connection, my connection is ADSL2+, Check Modulation Type in the picture.
 
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clarkjd

clarkjd

Splendid
Dec 7, 2005
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Who is your ISP?
If you had a Fiber internet connection, you should be capable of 25-50 mbps(or more!) instead of 2-4 mbps as shown.
 
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Y

youssef13

Feb 15, 2018
15
0
10


In egypt, the quality of cables is bad, so 5mbps speed is the average that every one can get, There is low percent can get more than 10mbps.
so, I'm not talking about the attainable rate now, I want to know what may cause the ACTUAL RATE to be half the Attainable Rate
.
 
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clarkjd

clarkjd

Splendid
Dec 7, 2005
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If you were the only user at a given moment, you could possibly attain the higher rate. As more users use the system the actual rate will go down.
 
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youssef13

Feb 15, 2018
15
0
10


I am not sure what you mean by the only user, but I'm using one router only to connect to my PC and using WiFi for mobile.
 
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clarkjd

clarkjd

Splendid
Dec 7, 2005
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You may be the only user in your house, but there are other houses on the same line, just different IP addresses. As more people use the line, the attainable rate goes down.

 
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youssef13

Feb 15, 2018
15
0
10


No, No one else is using the same line. and the attainable rate looks good for me if I achieved it.
 
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clarkjd

clarkjd

Splendid
Dec 7, 2005
6,486
34
28,490

I am sure that you are not the only internet customer of your ISP. The more users actually using the system provided by your ISP, the slower the access.

 
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youssef13

Feb 15, 2018
15
0
10


Surely, I'm not the only customer, but I'm the ONLY ONE on the same line, so I don't think that have nothing to do with my problem.
The attainable rate is good for me even if it's not good for fiber optic, if I'm not getting half the attainable rate, should it be ISP fault ? or it can be line quality fault ?
I mean, does line quality problem can prevent actual rate from getting near to attainable rate, or the line quality just affects attainable rate ?
 
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clarkjd

clarkjd

Splendid
Dec 7, 2005
6,486
34
28,490

I cannot diagnose from the U.S. the problems of Egyptian ISPs, I can only guess. My best guess is that your actual rate falls below the attainable rate because of heavy use of the rest of the system, or your lines really are so crappy as to prevent full speed.

 
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youssef13

Feb 15, 2018
15
0
10


"or your lines really are so crappy as to prevent full speed. "
that means the line quality doesn't affect only attainable rate but also actual rate ?
 
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clarkjd

clarkjd

Splendid
Dec 7, 2005
6,486
34
28,490

Attainable rate is best case scenario, if EVERYTHING worked perfectly. Actual rate is what you get in the real world and EVERYTHING affects it.

 
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Solution
Y

youssef13

Feb 15, 2018
15
0
10


Thanks! I had wrong information that line quality affects attainable rate only, and ISP should provide it to me.
Thanks for correction ^_^
I will call a technician to see if my line have any problems :)
 
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hang-the-9

hang-the-9

Titan
Mar 25, 2010
60,387
1,081
152,940


Line quality affects both, but that is in theory. Just like a car may be able to run at 200mph, but if all you can use are tires rated for 150mph you won't hit 200. And if you are driving with a heavy headwind or have the car loaded, you will not hit 200. If you are under you max speed, you may have a line issue, or be too far from the central station, or really a number of things. As I said in the first reply hehe. You may have a fibre connection to your house, but the whole setup may not be very good. If you are not at the lowest priced service tier and you are not getting close to what you are paying for, ask to change to a cheaper service.
 
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