WRT54G Connection Problems

Discussion in 'Networking Issues' started by smeagol1, Aug 1, 2004.

  1. smeagol1

    smeagol1 Network Guru Member

    I have a WRT54G using the latest satori public release firmware.

    I am having problems connecting a Dell Inspirion laptop with a broadcom 11b/g chipset to the AP but have no problems connecting a HP nx9010 which uses 11b.

    I used netstumbler to look at the RSSI for each laptop. The Dell laptop received a signal strength of -85dm and a noise level of -80dbm. The HP laptop had a RSSI of -50 to -60 dbm and a noise level of -65db. These measurements were taken when the laptops were side by side.

    The transmitt power of AP was set 84mw. The distance from the AP was about 20m.

    The AP shows a an RSSI of -80dbm for the DELL laptop and -85 for the HP laptop.

    I am still not sure if the problem is with a the wirless AP or the Receiver in the DELL laptop. It seems strange that the Dell receives a such a significant reduction in RSSI.

    Any help or ideas on the problem woud be much appreciated.

  2. Toxic

    Toxic Administrator Staff Member

    I doubt it is the router. more likely the antenna (or lack of a large enough antenna on the Dell is the most likely candidate.

    since the HP is b only transmission levels will be better than G on the dell.

    what is the throughput like on the dell? if it is bad perhaps then it would be advised to use b and not g. set the router to B only.
  3. smeagol1

    smeagol1 Network Guru Member


    My conclusion was that the antenna in the Laptop was pretty poor as well.

    I tried B only and it barely connects at 2mbps on the dell. The thing that concerns me the most is the poor RSSI on the Dell. Even when I doubled the Transmitt power from 40mw to 80mw the RSSI still remained on about -85dbm with the noise -80dbm.

    The Laptop also fails to connect at 54Mbps when located more than 5 meters from the AP.

    When the laptop is in run in adhoc mode with a DLINK Air Extreme Card it struggles to connect a speeds greater than 18mbps when located more than 5 meters away from the PC.

    The problem is I need to get the Laptop connected to AP at distances of 25 meters. I guess the solution may be to get a pcmia Wireless card.

  4. Toxic

    Toxic Administrator Staff Member

    Yeah this maybe the way forward. My Acer doesn't have built in Wireless though u use a Belkin F5D7000 wireless adaptor card and it does seem to work fairly well. since you say your dlink is good perhaps get another dlink would be best. at least you know the range of that.
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