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My ISP offers an internet speed for 20mb VDSL for 2 months and for free!

So i signed up for no money charge, and a tech support came to my house to set up my new Internet, he showed and confirmed me on the router statistics info that my router should be syncing at: 22570kbit/s download and 1119kbit/s upload.

But when he opened up speedtest.net to test my internet speed, i only got 9-10mb download and 1mb upload.

And when he tried to download something from a trusted websites like Mediafire and Mega, i was getting only a consistent of 1.1MB/s. (bytes not bit)

He told me he can do nothing about it, and this is the maximum speed i could get from my house, and i think he mentioned something about copper wires not configured well in my neighborhood and something about a wire loop.

Is there really nothing i can do to complain to my ISP to force my speeds to go higher?

Here's some DSL statistics shown on my router page:

SNR Margin (dB): 18.7db down , 30.1db up

Line attenuation (dB): 17.6db down , 3.9db up.

Thanks.

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  • VDSL speed depends on the distance (of the cable routing not the shortest direct disatnce) from the telephone exchange as well as the condition of any cabling.
    – DavidPostill ♦
    Sep 19, 2015 at 11:25
  • @DavidPostill the DSLM Cabinet is close to my house. (Look at my Line attenuation above)
    – John Hark
    Sep 19, 2015 at 12:03
  • Then talk to your ISP.
    – DavidPostill ♦
    Sep 19, 2015 at 12:22
  • Ok. Thank you. I knew it's on their end. Even though my modem/router reports 20mb, which is strange...
    – John Hark
    Sep 19, 2015 at 12:30
  • 17.6 db translates to roughly 1.25 km. So you should get a speed of over 20 Mbps increasebroadbandspeed.co.uk/2013/…
    – DavidPostill ♦
    Sep 19, 2015 at 12:33

2 Answers 2

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Why am I only getting half the advertised speed?

The router statistics info that my router should be syncing at: 22570kbit/s download and 1119kbit/s upload.

Notes:

  • The line can take up to 10 day for a line to sync at its final speed.

  • The actual throughput (real time) speed will be somewhat lower since it has an allowance to cover IP, ATM and other various overheads.

  • The maximum throughput speed on a line syncing at 8128 under ideal conditions would be just slightly over 7Mbps.

  • Other factors such as exchange contention, ISP restrictions or your IP profile will affect your actual throughput speed.

SNR Margin (dB): 18.7db down , 30.1db up

Line attenuation (dB): 17.6db down , 3.9db up.

These figures are good. Based on your 17.6 db down attenuation you are about 1.3 km from the DSLAM and your maximum line speed is about 26000 kbps.

enter image description here

You should speak to your ISP about not receiving the advertised speed

Source SG DSL Speed Calculator

Further reading

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  • Great! I called the tech support and he told me that they forgot to upgrade my 10mb to 20mb and apply it for my connection, now they successfully switched my line to 20mb, now i'm getting about almost what is advertised to me: 19.74mbps download speed. So it turned out it was their fault after all. I think i misunderstood something here. lol
    – John Hark
    Sep 19, 2015 at 20:09
  • Glad you got it sorted ;) Your new speed sounds about right given there are some "overheads" as noted in my answer.
    – DavidPostill ♦
    Sep 19, 2015 at 20:12
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Your down speed is specified in Mbps (Megabits per sec) There are 8 bits in a byte so you have to calculate your real download speed: offered dl speed / 8 = Your real dl speed you have to test your max download speed in IPv6 (for example speedtest is showing in IPv4), try Xfinity for testing.

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