[Prism54-users] Some confusion about channels and frequencies

[Douglas Almquist]

Well THAT's annoying...

I understand that this bug has been noted and will be fixed in the next 
release.

Thanks for the clarification.

~Douglas

On Tuesday 06 July 2004 08:04, Bjørn Mork wrote:
> Douglas Almquist <dougga at speakeasy.net> writes:
> > I have a Netgear WG511 card that I've been quite happy with now that I've
> > switched to a kernel that supports the card natively.
> >
> > I've been investigating security on my wireless net and have some
> > questions about channels and frequencies.
> > Using iwlist, I get the following list of frequencies/channels that claim
> > to be supported...
> >
> > iwlist eth1 freq
> > eth1      26 channels in total; available frequencies :
> >           Channel 01 : 2.412 GHz
> >           Channel 02 : 2.417 GHz
> >           Channel 03 : 2.422 GHz
> >           Channel 04 : 2.427 GHz
> >           Channel 05 : 2.432 GHz
> >           Channel 06 : 2.437 GHz
> >           Channel 07 : 2.442 GHz
> >           Channel 08 : 2.447 GHz
> >           Channel 09 : 2.452 GHz
> >           Channel 10 : 2.457 GHz
> >           Channel 11 : 2.462 GHz
> >           Channel 12 : 2.467 GHz
> >           Channel 13 : 2.472 GHz
> >           Channel 14 : 2.484 GHz
> >           Channel 37 : 5.17 GHz
> >           Channel 38 : 5.18 GHz
> >           Channel 39 : 5.19 GHz
> >           Channel 40 : 5.2 GHz
> >           Channel 41 : 5.21 GHz
> >           Channel 42 : 5.22 GHz
> >           Channel 43 : 5.23 GHz
> >           Channel 44 : 5.24 GHz
> >           Channel 45 : 5.26 GHz
> >           Channel 46 : 5.28 GHz
> >           Channel 47 : 5.3 GHz
> >           Channel 48 : 5.32 GHz
> >           Current Channel=10
> >
> > However using a tool that comes with kismet, I get a very different list
> > of supported channels:
> >
> > listchan.pl eth1
> > 1,2,3,4,5,6,7,8,9,10,11,12,13,14,34,36,38,40,42,44,46,48,52,56,60,64
>
> The iwlist frequencies and the listchan channel numbers are correct.
> The iwlist channes numbering is wrong.  Ref 802.11a, where
>
> channel 34 = 5170 MHz
> channel 36 = 5180 MHz
> channel 38 = 5190 MHz
> channel 40 = 5200 MHz
> channel 42 = 5210 MHz
> channel 44 = 5220 MHz
> channel 46 = 5230 MHz
> channel 48 = 5240 MHz
> channel 52 = 5260 MHz
> channel 56 = 5280 MHz
> channel 60 = 5300 MHz
> channel 64 = 5320 MHz
>
> > I'm hoping someone can shed some light on this for me.
>
> use frequencies, not channels
>
>
> Bjørn
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