Wireless Access

Hi Airheads,

I am trying to find out what kind of client behaviour is allowed when the wireless client is located in a foreign country.

Imagine a European WiFi client which is FCC and ETSI certified moves fom Europe to the US not knowing where it is located
1.Is it allowed to send active probes on all channels, e.g. channel 13?
2.Or is it allowed to only send active probes on a reduced list of channels that are allowed everywhere in the world and listen passively on the remaining channels?
3.Or is it allowed to scan passively on all channels and when it sees WiFi activities (Initiator) on a channel it is allowed to switch to active probes?

I have an Intel 9260 NIC and it follows with Linux OS option 3.

Thank you

Jan

What is the right answer and where it is specified?

PS: World mode (802.11d) is as far as I know banned, so the regulatory domain information element that is transmitted in the beacon would not be any help.

My understanding is that the client devices can probe / scan for any and all channels, but commerical infrastructure is limited based on regulatory domain. For example, if wireless AP is restricted to US, it is only going to broadcast on 1,6,11 for 2.4Ghz for example. I've done site surveys where I've detected devices on other channels, most of them being home router type devices and they had clients connected.