* On 15.07.2011 04:35 AM, Grant wrote: > Hmmm, so if I get a US EEPROM and travel to another country, I may > need to patch ath5k to connect to a particular AP?
Nope, this stuff doesn't apply to client cards only, however AP mode is severely restricted by regulatory rules. If you get an US flashed card, everything will be fine, as all legitimate channels in the US will be open. If you go to Japan with this card, all non-legitimate channels there are disabled. Also, Japan allows using WLAN on channels 12 and 13, whilst the US do not. As you've got an US branded card, you won't get the additional channels unlocked. Now, if Japan HAD disallowed channel 9 for instance and the US had not, channel 8 would be locked in Japan, but not in the US. Of course, that's not the case, just some gedankenexperiment. That's what I mean. Channel restrictions do stack, but you won't get channels unlocked if your base flashed information do forbid them already. Ok, that's one part of the problem. The other one is that many retailers sell cards with a world regdomain flashed. This world regdomain is very restrictive, as it basically aims to support the LARGEST subset of allowed channels common to all countries in the world. As such, you won't be able to run an AP on the 5GHz band (802.11a), as many frequencies are marked as "no beaconing" (no AP mode), DFS (radar scanning and frequency switching, iff some military radar unit wants to use this specific frequency etc.) and the rest as both. So for using the card as an AP on 5GHz and given the card has the world regdomain flashed, you'd have to patch the kernel driver to either unlock all channels (yeah, that's bad...) or force a specific regdomain, preferably of your own country, i.e. US, which is more permissive than the world regdom. This being said, the 2.4GHz band (802.11b/g) is a deal less restrictive. Keep in mind though, that there are only 2 non-overlapping channels with HT40 (802.11n) - channel 3 and channel 11. AFAIK any world reg domains allows AP mode on those channels, so you should be golden. See also: http://linuxwireless.org/en/users/Drivers/ath?highlight=%28crda%29 Hope that helps and wasn't too confusing. Best regards, Mihai
smime.p7s
Description: S/MIME Cryptographic Signature
_______________________________________________ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
