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WRT54GS Lan Speeds

Discussion in 'Cisco/Linksys Wireless Routers' started by fatal, Jun 7, 2004.

  1. fatal

    fatal Network Guru Member

  2. AbNormal

    AbNormal Network Guru Member

    fatal,

    The data transfer rate you quote sounds low, but a couple of points of clarification are needed.

    The first question that comes to mind, is the actual data rate. If you mean 400KB to be 400 Kilo Bytes, then this would translate to 4 Megabits/sec, which although isn't too bad, still falls short of the figures quoted in the review posted Here. If you meant 400 Kilobits, then your performance really sux!

    What is the distance between your WRT54GS and PC? Note that the 22.9 Mbs shown in the review was obtained at a distance of about 5 feet, and will rapidly taper off as the distance increases, or line of site is diminished.

    Regards.
     
  3. AbNormal

    AbNormal Network Guru Member

    fatal,

    One more question...

    Be sure that when you are doing throughput tests that you (or someone else nearby) isn't 'connected' to your AP with an 802.11B card/adapter, as that could pull down the data rate.

    As a further test, try re-configuring your WRT54GS to run exclusively at 'g' speeds, as found under the Wireless tab - G-Only. This would provide a further clue as to the nature of your speed issue.

    Other possibilities, could be other sources of RF interference in the 2.4GHz range, such as someone else's access point on the same channel (try changing your channel number), or a 2.4GHz cordless phone. Power down the phone for starters if you have one, or try different channels on both the phone and access point, until you find frequencies far enough apart, allowing the devices get along together. If the phone base unit is close to the access point, then put some distance between them. I opted for 900MHz phone, just for this very reason. YMMV

    Hope this helps...
     
  4. esackbauer

    esackbauer Guest

    Fatal, make sure that you dont have the WRT54G and the usb adapter very close together. They need to be at least 1-2 meter apart from each other.

    Also if you try to copy to a Windows domain controler you might experience that slow transfer. There is a registry hack for that.

    Cheers,
    Mundl
     
  5. Esquire

    Esquire Mesquire Staff Member Member

    Is the computer's USB port USB 1.1 or USB 2.0 compatible?
     
  6. fatal

    fatal Network Guru Member

    Ok, I was speaking about kilo bytes sorry i should have made that clear.

    Esquire, i think that may be it...You know i'd be pretty sure this laptop is probably usb 1.1 not entirely sure though but that would explain the slow speed. What kind of speed would i generally get off usb 1.1 and how can i check what version i have?
     
  7. Esquire

    Esquire Mesquire Staff Member Member

    USB 1.0/1.1 has a maximum bandwidth of 12Mbps (Megabits/s) at Full Speed, assuming USB LAN cards are not low speed USB devices (in which case this drops to 1.5Mbps).

    Given the network overheads, encryption, signal strength, etc., the realistic LAN speed on 802.11b is more like 4-5Mbps at best and under test conditions, so I suspect 802.11g would perform comparably to 802.11b on USB 1.1.

    Unfortunately, I do not have the data on WLAN using USB adapters (I don't use any USB LAN cards), perhaps someone else can confirm with real data.

    There are a couple of ways of checking if you have USB 2.0.

    1. USB logo on the computer.
    USB 2.0 has a USB logo with Hi-Speed written on top of the logo.

    2. Windows Device Manager.
    Check the entries listed under the Universal Serial Bus Controllers. See http://www.usbman.com/Guides/checking_for_usb_2.htm for an illustrated guide.

    Method #2 is more reliable because it also takes into account of the OS support.

    Please note Windows 2000 SP4 and Windows XP SP1/SP1a include USB 2.0 support. Other versions of Windows will require driver support from your USB manufacturer. You should be able to find plenty of info on the USBMan's website.
     

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