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Speed of transfer with wrt54 g

Discussion in 'Cisco/Linksys Wireless Routers' started by Tired, Sep 19, 2006.

  1. Tired

    Tired Network Guru Member

    I have a linksys router WRT54G and i am having a few problems with it at the moment. I have a simple question, how long should it take to transfer 10 megabyte via the wireless link. I have just transfered 38.4 megabyte between the two computers i have networked and it took around 40 seconds. Is this a good or poor transfer rate.
  2. Esquire

    Esquire Mesquire Staff Member Member

    It can depend on many factors such as the type of file being transferred, network overhead, signal quality (not necessarily signal strength), whether the other end is using a wireless connection (wireless <-----> wired tends to be slightly faster). As a test, I transferred a 32MB WMV (Windows Media Video) file from one wireless client to another wireless client in the room as the router and it took over 40 seconds, which comes to a speed of about 7Mbps.
  3. Tired

    Tired Network Guru Member

    Thanks for the info. My set up is, 2 x pc one is hard wired to router, the other is on a wireless link. The file i transfered was a rar archive and i initiated the transfer from the wireless connected pc by dragging the file from shared folder on hard wired pc to the desk top of wireless linked pc.

    I dont understand how if the router supports 54Mbps why my transfer took 40 seconds. The router is between 15 and 20 feet from the wireless connected pc. What does that 54Mbps equate to in megabytes per second.
  4. Esquire

    Esquire Mesquire Staff Member Member

    54 Megabits = 6.75 Megabytes (simply divide Megabits by 8)

    Network speeds are usually measured in Megebits. The quoted speed is the network connected speed, whether wired or wireless, which is the speed that the device connects to the network, it does not translate directly to data throughput speeds due to issues such as network overhead, driver flaw, cable noise, etc. On a standard 802.11g wireless network without Super G or Afterburner (Linksys: SpeedBooster), best throughput is about 25Mbps. As previously mentioned, some files just don't get very fast when being transferred.
  5. Tired

    Tired Network Guru Member

    Thanks once again Esquire, unfortunately i still cant get my head round this. If we take this figure that you quoted


    if we now divide it by eight it comes out at 3.1 megabyte a second so it works out at 186 megabytes a minute. Am i correct or no were near. If i go back to my first post and look at the figures i got for the file transfer. It roughly works out to just under a megabyte a second. I can live with that, even though its only a 1/3 of the 3.1 megabyte ive worked out from the 25Mbps you quoted as about the best throughput on wireless g. No doubt ive confused you now, cos ive certainly confused myself. I can just feel my brains turning to sawdust.
  6. Esquire

    Esquire Mesquire Staff Member Member

    Unfortunately, it's not as simple as the calculation suggests. While the best speeds are often achievable, even I don't get the same transfer speed every time on my own network - it can be as low as 12Mbps and as high as 24Mbps, even with the same file every time - hardware defects not withstanding everyone faces the same set of issues mentioned previously.

    There is one other thing you can try to improve your transfer speeds - Frame Bursting. It's disabled on a WRT54G by default - you can find it under Advanced Wireless Settings section if you logon to your router at its IP address. You also need to enable it for your wireless adapter - the setting can be found in the driver's Advanced properties page in Device Manager labelled as XPress Technology.
  7. Tired

    Tired Network Guru Member

    Cheers, as i said i can live with the transfer speed im getting its not as if i transfer much from one pc to the other. The "Frame Bursting " thing looks interesting though. I think i will experiment a bit more transfering files of differing types and sizes before tampering though.

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