The ipw3945 project
Posted Mar 2, 2006 15:12 UTC (Thu) by danm628
In reply to: The ipw3945 project
Parent article: The ipw3945 project
There are several reasons your notebook's WiFi link works in multiple countries. The simplest reason is that most countries use the same 2.4GHz IFM band, so the odds are that your device overlaps the allowed spectrum in the country you are visiting. This is why most older devices work when in different countries. Of course there is no check that the device complies to local regulations. All countries (or most -- there may be an exception I don't know about) use the same band but they do have differences in the size of the band and the allowed transmit power levels.
Newer devices support 802.11d which allows a 802.11 STA to receive regulatory settings from a 802.11 AP. So your notebook will automatically conform to the regulatory domain defined by the AP.
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