Adapter works fine, identicle adapter 2m away has poor connection

Discussion in 'Other Linksys Equipment' started by pr10n, Aug 11, 2006.

  1. pr10n

    pr10n LI Guru Member

    I'm finally subscribing to ADSL after being on dialup for the last 10 odd years, but to be able to afford it I'm splitting the costs with the others in my household. This means we're all investing in a wireless network as we are currently running two separate networks. Running a cable from my switch to the switch at the other end of the house is not an option. So far only my brother and my PC's are connected to the gateway, (Linksys WAG54G), via Linksys WMP54G network adapters. Our rooms are next to each other and the gateway is located in the kitchen about 7m away. Our computers, though separated by a wall, are only about 2m apart.

    Heres the problem, My brother gets a rock solid connection at 54Mbps while my connection is very unstable. Often either my transmit rate or my receive rate is stuck on 1Mbps and the signal strength varies by the second quite dramatically. I'm sure some fluctuation is normal but its causing severe lag, packet loss, and insomnia. I don't think its interference, I've used all channels and they are pretty much the same. I'm currently using channel 1. (AU Model) I'm also using MAC address filtering so I doubt its silly buggers.

    Anyone got any Ideas? Or even able to tell me what a reasonable noise and signal strength level should be. I'm currently on about -79dbm noise and -55dbm signal strength, though my brother gets about the same levels and like I said before he's connection is rock solid.

    Appreciate any suggestions you can make.
  2. Esquire

    Esquire Mesquire Staff Member Member

    Try switching the two adapters around and see if the problem stays with the same adapter.

    What type of wall is it? Any steel reinforcement within the structure?
  3. sbrager

    sbrager Network Guru Member

    I had a similar problem not so long ago on my sister's setup. The problem was resolved when I noticed that there were 2 SSID's in range of her wireless adapter which had the same name - "linksys". I changed the SSID of her router and everything began to work as it should. Her router also had the Linksys default password which I changed.

    Always change the default SSID and the router password.

  4. pr10n

    pr10n LI Guru Member

    There is no steel or any other metals in the house structure apart from gang nails and such. I am not running the default SSID. Could it be that my pc in on the desk while my brothers is on a coffee table and therefore lower in relation to the gateway? Also I should have mentioned before that I have swaped the adapters and the problem stayed with my machine not the network adapter. Thanks guys.
  5. Esquire

    Esquire Mesquire Staff Member Member

    You still haven't said what types of walls you have. This could be an radio reception issue.

    Where is the kitchen relative to each room with a computer? Draw an imaginery straight line from each computer to the router in the kitchen, how many physical obstacles and walls the signal passes through? How thick or deep is each?

    You may also want to include the configuration of each computer for comparison.
  6. pr10n

    pr10n LI Guru Member

    The walls are plaster board. (Gang nails are rarely used in anything but timber with plasterboard) There is one wall between the gateway and my pc and one wall between the gateway and the other pc. The walls are about 300mm thick, (A very standard size). Both are about 7m away from the gateway (as implied in my first post)

    PC 1 (Working):
    Athlon 3800+
    Abit KN8 Ultra (Nforce 4)
    Antec smartpower 2 450w
    1Gb Samsung DDR400
    Geforce 6800GS

    PC2 (Not working):
    Athlon 3700+
    DFI lanparty SLI-DR (Nforce4)
    Antec smartpower 2 500w
    2Gb Corsair DDR400
    Geforce 7800GT
  7. Esquire

    Esquire Mesquire Staff Member Member

    Looks reasonable from an interference standpoint.

    Is the motherboard chipset driver up-to-date?
  8. HennieM

    HennieM Network Guru Member

    Swop the machines - adaptor and all - to exactly replicate the current setup. If problem persists on machine A (now in space B), I'd look in and around the machine, network driver, etc.

    It could be that the orientation of the PC is such that it blocks the signals; i.e. if the bulk of the PC is in between the gateway and the antenna of the network card, I would expect the signals to be fairly impaired. Also, the orientation of the antenna on the card will have an influence.

    If, after the swopping, the problem is transferred to the other machine, it's definitely environment related. Radio signals have "dead spots", so maybe slightly changing the orientation of the gateway or just its antenna may solve that.
  9. pr10n

    pr10n LI Guru Member

    Drivers up to date, I'll try swapping the machines around. Thanks for all your help :)
  10. jgutz20

    jgutz20 Network Guru Member

    also try changing the wireless channel
  11. pr10n

    pr10n LI Guru Member

    Just to let you know, the problem appears to be the vertical plane rather than the horizontal. Moving my pc off the desk and onto the floor fixed things straight up. Weird, becuase the router is placed ontop of a book case about 2m high. Thanks again
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