WiFi regdomain ETSI vs ETSI2

[jbo@]

Could somebody explain to me the difference between ETSI and ETSI2 as the setting the regdomain on a WiFi interface?

I generally understand what ETSI is. But I was confused seeing ETSI2 in the handbook.

According to /etc/regdomain.xml, there also appears to be an ETSI3.

 

[adorno]

According to the respective comment in/etc/regdomain.xml, ETSI2 is just ETSI w/o HT40/VHT in 5GHz. From my understanding of how these things are managed, I'd say ETSI (the regdomain setting) is what's allocated by ETSI (the organisation), while ETSI2 and ETSI3 reflect that not all frequency bands allocated are allowed to be used in all member countries. The country list near the end gives several where ETSI2 should be used, but none for ETSI3.

 

[Erichans]

I'd say ETSI (the regdomain setting) is what's allocated by ETSI (the organisation), while ETSI2 and ETSI3 reflect that [...]

Yes, I think so too. Other indications to that effect seem to come from /lib/lib80211/regdomain.xml#L671-L682:

<!-- ETSI w/o HT40/VHT in 5GHz -->

<rd id="etsi2">
  <name>ETSI2</name>
  <sku>0x32</sku>
  <netband mode="11b">
    <band>
      <freqband ref="F1_2412_2472"/>
      <maxpower>30</maxpower>
      <flags>IEEE80211_CHAN_B</flags>
    </band>
  </netband>
[...]

and /lib/lib80211/regdomain.xml#L739-L745:

<!-- ETSI - channel 36 -->

<rd id="etsi3">
  <name>ETSI3</name>
  <sku>0x33</sku>
  <defcc ref="RO"/>
  <netband mode="11b">
[...]