On Sunday 25 April 2010 13:19:51 Adam wrote:
> > Check that you have disabled 802.11b on your router, or you may find that
> > an adjacent client who's running 802.11b will drag your router down to
> > 11Mb/s max (the actual throughput will be lower).
> 
> Router is already fixed to g only.
> 
> > While you're experiencing the lower downloads you can run iwlist <iface>
> > scan to see the speed at which your NIC is connecting at.  If it is
> > 802.11g it'll say so:
> 
> Thanks, i can see my own router (Cell 01) and three others, looks like I
> should try channel 13. I can't see the speed shown in the output tho.
> 
> wlan0     Scan completed :
>           Cell 01 - Address:
>                     Channel:1
>                     Frequency:2.412 GHz (Channel 1)
>                     Quality=69/70  Signal level=-41 dBm
> 
>           Cell 02 - Address:
>                     Channel:1
>                     Frequency:2.412 GHz (Channel 1)
>                     Quality=32/70  Signal level=-78 dBm
> 
>           Cell 03 - Address:
>                     Channel:6
>                     Frequency:2.437 GHz (Channel 6)
>                     Quality=60/70  Signal level=-50 dBm
> 
>           Cell 04 - Address:
>                     Channel:6
>                     Frequency:2.437 GHz (Channel 6)
>                     Quality=48/70  Signal level=-62 dBm

Try channels 11 and 13, unless they are already congested.
-- 
Regards,
Mick

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