Can you change the Country Code?

Live forum: http://rt2x00.serialmonkey.com/viewtopic.php?t=4389

vincent1212

28-10-2007 22:37:06

I'm studying abroad next semester and I would like to be able to use my current rt73 wireless dongle to connect to the university's wireless network. Is it possible to change the country code to allow me to use the channel set of the region I'm in? I know there are instructions on how to do this for Atheros chip sets but I haven't seen anything with respect to changing it for the RaLink cards specifically those supported by the rt73 driver which I use.

Thanks,
-Vin

IvD

29-10-2007 18:57:35

From the iwpriv_usage.txt file which you undoubtly have read

DESCRIPTION
[parameters] [val] /{range}
----------------- -------------------------------------------------
CountryRegion {0~7}
Set country region
0 1 ~ 11 ch
1 1 ~ 13 ch
2 10, 11 ch
3 10 ~ 13 ch
4 14 ch
5 1 ~ 14 ch
6 3 ~ 9 ch
7 5 ~ 13 ch

CountryRegionABand {0~10}
Set country region for A band
0 36, 40, 44, 48, 52, 56, 60, 64, 149, 153, 157, 161, 165 ch
1 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140 ch
2 36, 40, 44, 48, 52, 56, 60, 64 ch
3 52, 56, 60, 64, 149, 153, 157, 161 ch
4 149, 153, 157, 161, 165 ch
5 149, 153, 157, 161 ch
6 36, 40, 44, 48 ch
7 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140, 149, 153, 157, 161, 165 ch
8 52, 56, 60, 64 ch
9 34, 38, 42, 46 ch
10 34, 36, 38, 40, 42, 44, 46, 48, 52, 56, 60, 64 ch

Starcrasher

30-10-2007 00:04:26

Is there somewhere we can find which country match which country region ?

vincent1212

30-10-2007 00:55:54

From the iwpriv_usage.txt file which you undoubtly have read[/quote28pjon63]

Excellent thanks, I had actually read though the documentation in the root there but didn't realize there was more hiding in the source code directory.

vincent1212

30-10-2007 00:59:40

Is there somewhere we can find which country match which country region ?[/quote1ibyw1wy]

Doubtful, the numbers are different for each chip set manufacture, you just have to know which channels are legal in your region. I believe the most common is...

United States - 1 ~ 11
Europe - 1 ~ 13
Japan - 1 ~ 14

Not sure about any of the others.

IvD

30-10-2007 18:47:15


Europe - 1 ~ 13
[/quote1kpk7ehb]

That would be Europe minus France and Spain(?) those 2 have more restricted ranges.
Anyway you can find the correct tables in the ieee80211 specifications or wikipedia.

Starcrasher

30-10-2007 19:57:15

Thanks !
I have found the response on french wikipedia[/url1w82c9n2]. Spain and France used to restrict channels but now allow the use of the full ETSI range like other European countries.

I was wondering because most documentation still refer to this restriction and a simple scan with RutilT was showing all channels were used.
Even the [url=http://en.wikipedia.org/wiki/List_of_WLAN_channels1w82c9n2]english wikipedia[/url1w82c9n2] seems outdated. ?

BTW, Japan case is not the most clear, most say 1~14 channels are allowed. But I found a page where someone says only the 14 is allowed.

IvD

30-10-2007 21:46:39

Japan has 2 different regions. One is indeed 1-14 and the second is 14 only.