Strange signal-power with linksys firmware and centrino wlan

Discussion in 'Cisco/Linksys Wireless Routers' started by dadaniel, Aug 5, 2004.

  1. dadaniel

    dadaniel Network Guru Member

    I got a wrt54gs with WRT54GS-DE_2.07.2.de_ETSI_code.bin Firmware.

    The router stays at the left side of my desk, the laptop with centrino-wlan at the right.

    I have a signal-quality of 100% but only a signal-strength of 75-80% and a RSSI of 30 - 50.

    I also have a lost-ap-packets of 20% if I copy a file over wlan.

    Is the original firmware designed only for in-building work??
    And why there are these errors?

    If I flash the router with satori4, I get a RSSI of >50 and signal-quality and signal-strength of 100%.
    If I set the tx-power to 84mW i get a RSSI of >60.

    I also have a Netgear WGR614v2 - Router, with it I never discovered such problems!!

    What's the reason?
  2. hkazemi

    hkazemi Network Guru Member

    It sounds like in the first case that your router has too much transmit power and is overdriving the receiver in your centrino wireless NIC. An RSSI of 30 is very high, possibly too much for that NIC. This can cause the packet loss you saw.

    The Satori firmware may have a lower default power output (as suggested by your RSSI figures), such that your centrino card doesn't get overdriven.

    When an AP/router is in the same room as a wireless client card, high power isn't necessarily a good thing.
  3. dadaniel

    dadaniel Network Guru Member

    Oh, that's probably the reason........I'll test it and report the results here! Thank you! :p
  4. daniel23

    daniel23 Guest

    >I got a wrt54gs with WRT54GS-DE_2.07.2.de_ETSI_code.bin Firmware.
    >I also have a lost-ap-packets of 20% if I copy a file over wlan.

    I've seen a similar problem both with wrt54g (v2) and wrt54gs and it looks like I just fund the fix.

    symptoms: ping over wireless connection between wrt54g* and Intel Centrino PRO/2100 fails for exactly 12 seconds in every minute. A very regular event.
    Doing a ping from the wrt54 to the laptop always gives me 21% packet loss.
    The same Centrino Laptop connects just fine to a Netgear Adhoc wlan connection which made me think the wrt was the problem. But the problem remained regardless which firmware and settings I tried.

    I returned my wrt54g and got a wrt54gs (which still may have been a good move considering I actually paid 2 euro less for twice the ram) but still the wireless hangs 12 seconds in every minute.

    I finally paid a visit to the laptop vendor's driver support side. (acer travelmate 660) Turns out that I had the intel driver vers 1.1.50 installed and after I downloaded and installed a new driver vers the wireless connection runs ok now
  5. dadaniel

    dadaniel Network Guru Member

    Bad News :cry:

    I think my Wrt54GS is defective!
    I tried with two different Network Adapters, i always have a signal-strenght of 70% one meter away from router.
    If I go away, the signal goes down! :(

    I will bring it back to the shop where I've buyed it and hopefully get a working model.

    I've even tryed with Sveasoft Alchemy at 251mW but the same result.
    I think there is some wrong inside this thing!
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