./nfo/linux/wlan.channel.nfo

# ----------------------------
# Activate wlan channels 12-14
# ----------------------------

http://en.wikipedia.org/wiki/ISO_3166-1_numeric

# Atheros Madwifi (ath_pci):
echo "options ath_pci countrycode=392" >> /etc/modprobe.d/modprobe.conf

# RaLink Serialmonkey rt2x00 (rt61pci):
echo "options cfg80211 ieee80211_regdom=JP" >> /etc/modprobe.d/modprobe.conf

[root] iwlist ath0 chan     
ath0      27 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
          Current Frequency=2.472 GHz (Channel 13)