[MLB-WIRELESS] 802.11b channels question...

[Peter Long]

Paul,

Looks like you can use channel 14 but only using 200
milliwatts on that frequency.

see
http://www.aca.gov.au/aca_home/publications/reports/info/spreadsp.htm#Frequency_Bands_and_Power

for more details.

See ya......

Peter Long

--- paul van den bergen <pvandenbergen at swin.edu.au>
wrote:
> Hi all,
> 
> I have been writing up some 802.11b lectures
> recently and digging around for 
> information... and I noticed something interesting.
> 
> we all know the channels overlapping thing right?
> 
> according to ieee standard 802.11b 1999 (see
> ieee.org), we have 14 channels, 
> 22 MHz wide, starting at channel 1, centred at 2.412
> GHz and each cahnnel is 
> offset by 5MHz up to channel 13.
> Now, channel 14 is offset from channel 13 not by 5
> MHz, but by 12 MHz...
> 
> ch 13 centred at 2.472 (2.461 - 2.483)
> ch 14 centred at 2.484 (2.473 - 2.495)
> 
> so ch14 is clear of the top of ch 11.
> 
> so that seems to indicate that if we select ch 1, 6,
> 11 and 14, we will have 4 
> clear channels!!!!
> 
> some one tell me I'm wrong...
> 
> and while we are at it, can someone direct me to the
> specification that states 
> what channels are applicable to Australia...
> 
> I believe we can use all 14 channels, but the IEEE
> 802.11b doc lists eg. USA 
> ch 1-13 and Japan as ch 14 _only_... I have been
> under the misapprehention 
> that we here in Aus follow the Japan model which
> allows the use of any 
> channel...  
> 
> 
> 
> 
> -- 
> Dr Paul van den Bergen
> Centre for Advanced Internet Architectures
> caia.swin.edu.au
> pvandenbergen at swin.edu.au
> IM:bulwynkl2002
> "And some run up hill and down dale, knapping the
> chucky stones 
> to pieces wi' hammers, like so many road makers run
> daft. 
> They say it is to see how the world was made."
> Sir Walter Scott, St. Ronan's Well 1824 
> 
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> 


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