Re: [Ethereal-users] WLAN Channels - Japan

[Jaap Keuter <jaap.keuter@xxxxxxxxx>]

Hi,

Although off topic, I've googled an answer for you:
---------------------8<-----------------
But after looking into it, I think I've managed to figure out the source
of our disagreement.
The original specification for the IEEE 802.11 standard stated that only
channel 14 was allowed for use in Japan (p.216). The first amendment for
802.11b (DSSS with CCK for 5.5 and 11 Mbps) didn't state anything
different.
However, in October 2001 there was a second amendment to 802.11b that
extended the operating range in Japan to include channels 1-13.
This should explain why cards build after this date (or January 2002)
should work fine in Japan as well.
---------------------8<-----------------

Now you've some pointers to look into. Off list I hope.

Thanx,
Jaap

On Tue, 11 Apr 2006, Mathew Boon wrote:

> Hi,
>
> This may be a bit off topic but I don't think this type of question sits
> definitively in any/most mailing lists.
>
> Does anyone know when Japan's MKK dropped the Channel 14 only regulation
> and started allowing all channels 1-14 for 2.4 GHz WLAN. In the original
> 802.11 standard it states that Japan is Channel 14 only, but recently
> (or, not so recently) cards are shipping that work on channels 1 thru 14
> in Japan.
>
> Madwifi drivers for linux allow you to set the countrycode of operation
> using the numbering scheme defined in ISO 3166. A list of channels for
> each countrycode is listed in http://www.nuclearcat.com/athmap.txt .
> This list also suggests channel 1-14 availability in Japan.
>
> Why this happened, and any links to articles discussing the change would
> also be of help. I am also interested in Spain..
>
> Mathew.
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