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Recent decline in Download on 802.11G

Discussion in 'Networking' started by sholleran, Jan 11, 2013.

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  1. sholleran

    sholleran Thread Starter

    Jan 10, 2013
    I have an ancient 802.11G DLink DI-524 serving faithfully for years. I've put off upgrade to N b/c too lazy to re enter all those MAC-IDs.

    When I cat5 to it, speedtest says I get 5.6 Mbps download, .9 up (ISP says up to 6 Mbps down) so pretty happy with that. It's hardwired to DVD & TV so that's all good.

    For several years on wireless (54 Mbps) my speedtest said 1.3 Mbps down, .3 up - I believe because of encryption, but acceptable.

    This week on wireless (54 Mbps) it sucks, My speedtest says about .48 - .50 Mbps down, .3 up. Cat 5 still gets 5.6 Mbps / 0.9 Mbps.

    What has happened? Since my Cat5 speed is OK, ISP is OK. Since my UP is OK, does that mean interference is ruled out, or are up & down done on different frequencies? If not interference, can I determine if it is hardware failure short of replacing it? I don't observe any difference by time of day and no new SSIDs turn up lately, so if it is interference I don't know what from. I did wonder if somebody in neighborhood got new hardware for Christmas.

    Suggestions appreciated...
  2. etaf

    etaf Moderator

    Oct 2, 2003
    First Name:
    have you tried with no security set to see what speed you get

    it maybe the old router , they do wear out - but your original speed appears low anyway - how far away from the router are you

    and have you updated the driver on the wireless adapter on the PC - best to actually re-install rather than just use update

    lets see an xirrus screen shot

    Run Xirrus Wi-Fi Inspector
    Download and install

    If you cannot access the internet with this PC, then you will need to copy the program across to the faulty PC
    Save the file to a USB flash drive or other removable media. Plug it into the working computer with internet access and copy the file and install the program.
    You will now need to take a screen shot and copy that back to the working PC and attach the screen shot in a reply on the forum here.

    Direct link to the program is here http://info.xirrus.com/Wi-FiInspectorConfirmation.html

    {If the above link does not work heres another link http://www.pcworld.com/downloads/file_download/fid,77196-order,4/download.html}

    Then run and install the program - on a wireless enabled PC/Laptop
    if you get an error - You need will need to have NET Framework installed for the WiFi Inspector to function.
    On windows 8 - (i do not have windows 8) but, it would appear that, When you first try to run, you may get a message that .net framework is needed, and included in that message is a link to download/install.

    Run the program

    A user guide is available here http://www.xirrus.com/cdn/pdf/Xirrus-Wi-Fi-inspectorguide-1-2-1-RevB-6.aspx

    post a screen shot of the program running.
    if there are a lot of networks showing can you click on "networks" top lefthand area - so we can see all the network information.

    post which SSID name is yours, its located in the list, under network "Adapter Name" (1st column)

    To post a screen shot of the active window.
    1) hold the Alt key and press the PrtScn key. Open the Windows PAINT application (Start> All Programs> Accessories> Paint) and Paste the screen shot. You can then use PAINT to trim to suit, and save it as a JPG format file.
    2) if you are using Vista/Windows 7 you can use the "snipping tool" which is found in Start> All programs> Accessories> Snipping Tool

    To upload the screen shot to the forum, open the full reply window ("Go Advanced" button) and use the Manage Attachments button to upload it here.
    Full details are available here http://library.techguy.org/wiki/TSG_Posting_a_Screenshot

    For a reliable (or robust as the Xirrus user guide says) wireless connection you need a signal of about -70 dBm or better. "A desirable signal level for a robust Wi-Fi connection will be green".
    note: the signal level is a negative number, so for example -88 is worst and -40 is better

    If you are using the Mac OS then use http://www.istumbler.net/

    if you want to optimise base station position and signal strength / dead spots use
    http://www.chimoosoft.com/products/apgrapher/ which has a graph function to monitor signal
  3. TerryNet

    TerryNet Moderator

    Mar 23, 2005
    First Name:
    That performance is terrible. There should be little if any difference from the ethernet speeds. If it is due to encryption there is a serious problem with the router or your computers/adapters/drivers.
  4. Couriant

    Couriant Trusted Advisor Spam Fighter

    Mar 26, 2002
    First Name:
    Agreed. WPA with TKIP should give 25MB (if you have that speed).
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