<div dir="ltr"><div>I found on a UBNT Nanostation running BB r43824 that apparently only a subset of the DFS 5.8GHz channels are enabled.<br><br> Frequencies:<br> * 5180 MHz [36] (17.0 dBm)<br> * 5200 MHz [40] (17.0 dBm)<br> * 5220 MHz [44] (17.0 dBm)<br> * 5240 MHz [48] (17.0 dBm)<br> * 5260 MHz [52] (23.0 dBm) (no IR, radar detection)<br> DFS state: usable (for 730 sec)<br> * 5280 MHz [56] (23.0 dBm) (no IR, radar detection)<br> DFS state: usable (for 730 sec)<br> * 5300 MHz [60] (23.0 dBm) (no IR, radar detection)<br> DFS state: usable (for 730 sec)<br> * 5320 MHz [64] (23.0 dBm) (no IR, radar detection)<br> DFS state: usable (for 730 sec)<br> * 5500 MHz [100] (disabled)<br> * 5520 MHz [104] (disabled)<br> * 5540 MHz [108] (disabled)<br> * 5560 MHz [112] (disabled)<br> * 5580 MHz [116] (disabled)<br> * 5600 MHz [120] (disabled)<br> * 5620 MHz [124] (disabled)<br> * 5640 MHz [128] (disabled)<br> * 5660 MHz [132] (disabled)<br> * 5680 MHz [136] (disabled)<br> * 5700 MHz [140] (disabled)<br> * 5745 MHz [149] (30.0 dBm)<br> * 5765 MHz [153] (30.0 dBm)<br> * 5785 MHz [157] (30.0 dBm)<br> * 5805 MHz [161] (30.0 dBm)<br> * 5825 MHz [165] (30.0 dBm)<br><br></div><div>This matches the channel definitions in the reg DB file:<br><a href="https://dev.openwrt.org/browser/trunk/package/kernel/mac80211/files/regdb.txt">https://dev.openwrt.org/browser/trunk/package/kernel/mac80211/files/regdb.txt</a><br><br></div><div>What is the reason for keeping channels 5470 - 5725 disabled, when that range is enabled, for example, for country DE? People are operating UBNT products with stock firmware on these bands in the US.<br><br></div><div>This table below represents my current understanding of permissible use of the DFS channels in the US:<table style="width:934.8pt;border-collapse:collapse" border="0" cellpadding="0" cellspacing="0" width="1246"><tbody><tr style="height:19.55pt"><td colspan="6" rowspan="3" style="width:934.8pt;padding:0in 5.4pt;height:19.55pt" nowrap width="1246"><p class="MsoNormal" style="text-align:center" align="center"><b><span style="font-size:16pt;font-family:Calibri,sans-serif">Point-to-MultiPoint</span></b></p>
</td>
<td style="width:0.3pt;padding:0in;height:19.55pt" width="0"><br></td>
</tr>
<tr style="height:19.55pt">
<td style="width:0.3pt;padding:0in;height:19.55pt" width="0"><br></td>
</tr>
<tr style="height:19.55pt">
<td style="width:0.3pt;padding:0in;height:19.55pt" width="0"><br></td>
</tr>
<tr style="height:15pt">
<td style="width:144.95pt;border-style:solid none solid solid;border-top:1pt solid rgb(149,179,215);border-bottom:1pt solid rgb(149,179,215);border-left:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(79,129,189)" valign="bottom" nowrap width="193">
<p class="MsoNormal"><b><span style="font-size:11pt;font-family:Calibri,sans-serif">Band</span></b></p>
</td>
<td style="width:129.8pt;border-style:solid none;border-top:1pt solid rgb(149,179,215);border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(79,129,189)" valign="bottom" nowrap width="173">
<p class="MsoNormal"><b><span style="font-size:11pt;font-family:Calibri,sans-serif">Lower Frequency</span></b></p>
</td>
<td style="width:130.1pt;border-style:solid none;border-top:1pt solid rgb(149,179,215);border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(79,129,189)" valign="bottom" nowrap width="173">
<p class="MsoNormal"><b><span style="font-size:11pt;font-family:Calibri,sans-serif">Upper Frequency</span></b></p>
</td>
<td style="width:202pt;border-style:solid none;border-top:1pt solid rgb(149,179,215);border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(79,129,189)" valign="bottom" nowrap width="269">
<p class="MsoNormal"><b><span style="font-size:11pt;font-family:Calibri,sans-serif">FCC Reg</span></b></p>
</td>
<td style="width:136.6pt;border-style:solid none;border-top:1pt solid rgb(149,179,215);border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(79,129,189)" valign="bottom" nowrap width="182">
<p class="MsoNormal"><b><span style="font-size:11pt;font-family:Calibri,sans-serif">Max Power (dBm)</span></b></p>
</td>
<td style="width:191.35pt;border-style:solid solid solid none;border-top:1pt solid rgb(149,179,215);border-right:1pt solid rgb(149,179,215);border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(79,129,189)" valign="bottom" nowrap width="255">
<p class="MsoNormal"><b><span style="font-size:11pt;font-family:Calibri,sans-serif">Notes</span></b></p>
</td>
<td style="width:0.3pt;padding:0in;height:15pt" width="0"><br></td>
</tr>
<tr style="height:15pt">
<td style="width:144.95pt;border-style:none none solid solid;border-left:1pt solid rgb(149,179,215);border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="193">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">900 MHz</span></p>
</td>
<td style="width:129.8pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="173">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">902.0MHz</span></p>
</td>
<td style="width:130.1pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="173">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">928.0MHz</span></p>
</td>
<td style="width:202pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="269">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">Part 15.247
(b)(3) , (b)(4)</span></p>
</td>
<td style="width:136.6pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="182">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">36dBm</span></p>
</td>
<td style="width:191.35pt;border-style:none solid solid none;border-bottom:1pt solid rgb(149,179,215);border-right:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="255"><br></td>
<td style="width:0.3pt;padding:0in;height:15pt" width="0"><br></td>
</tr>
<tr style="height:15pt">
<td style="width:144.95pt;border-style:none none solid solid;border-left:1pt solid rgb(149,179,215);border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt" valign="bottom" nowrap width="193">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">2.4 GHz</span></p>
</td>
<td style="width:129.8pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt" valign="bottom" nowrap width="173">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">2400.0MHz</span></p>
</td>
<td style="width:130.1pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt" valign="bottom" nowrap width="173">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">2483.5MHz</span></p>
</td>
<td style="width:202pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt" valign="bottom" nowrap width="269">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">Part 15.247
(b)(3) , (b)(4)</span></p>
</td>
<td style="width:136.6pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt" valign="bottom" nowrap width="182">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">36dBm</span></p>
</td>
<td style="width:191.35pt;border-style:none solid solid none;border-bottom:1pt solid rgb(149,179,215);border-right:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt" valign="bottom" nowrap width="255"><br></td>
<td style="width:0.3pt;padding:0in;height:15pt" width="0"><br></td>
</tr>
<tr style="height:15pt">
<td style="width:144.95pt;border-style:none none solid solid;border-left:1pt solid rgb(149,179,215);border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="193">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">5.1 GHz UNII Low</span></p>
</td>
<td style="width:129.8pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="173">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">5150.0MHz</span></p>
</td>
<td style="width:130.1pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="173">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">5250.0MHz</span></p>
</td>
<td style="width:202pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="269">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">Part 15.407
(a)(1), (e)</span></p>
</td>
<td style="width:136.6pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="182">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">36dBm</span></p>
</td>
<td style="width:191.35pt;border-style:none solid solid none;border-bottom:1pt solid rgb(149,179,215);border-right:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="255"><br></td>
<td style="width:0.3pt;padding:0in;height:15pt" width="0"><br></td>
</tr>
<tr style="height:15pt">
<td style="width:144.95pt;border-style:none none solid solid;border-left:1pt solid rgb(149,179,215);border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt" valign="bottom" nowrap width="193">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">5.3 GHz UNII Mid</span></p>
</td>
<td style="width:129.8pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt" valign="bottom" nowrap width="173">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">5250.0MHz</span></p>
</td>
<td style="width:130.1pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt" valign="bottom" nowrap width="173">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">5350.0MHz</span></p>
</td>
<td style="width:202pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt" valign="bottom" nowrap width="269">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">Part 15.407
(a)(2), (h)(2)</span></p>
</td>
<td style="width:136.6pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt" valign="bottom" nowrap width="182">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">30dBm</span></p>
</td>
<td style="width:191.35pt;border-style:none solid solid none;border-bottom:1pt solid rgb(149,179,215);border-right:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt" valign="bottom" nowrap width="255">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">Requires <span class="">DFS</span>
& radar det.</span></p>
</td>
<td style="width:0.3pt;padding:0in;height:15pt" width="0"><br></td>
</tr>
<tr style="height:15pt">
<td style="width:144.95pt;border-style:none none solid solid;border-left:1pt solid rgb(149,179,215);border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="193">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">5.4 GHz UNII <span class="">DFS</span></span></p>
</td>
<td style="width:129.8pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="173">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">5470.0MHz</span></p>
</td>
<td style="width:130.1pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="173">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">5725.0MHz</span></p>
</td>
<td style="width:202pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="269">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">Part 15.407
(a)(2), (h)(2)</span></p>
</td>
<td style="width:136.6pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="182">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">30dBm</span></p>
</td>
<td style="width:191.35pt;border-style:none solid solid none;border-bottom:1pt solid rgb(149,179,215);border-right:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="255">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">Requires <span class="">DFS</span>
& radar det.</span></p>
</td>
<td style="width:0.3pt;padding:0in;height:15pt" width="0"><br></td>
</tr>
<tr style="height:15.75pt">
<td style="width:144.95pt;border-style:none none solid solid;border-left:1pt solid rgb(149,179,215);border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15.75pt" nowrap width="193">
<p class="MsoNormal" style="text-align:center" align="center"><span style="font-size:11pt;font-family:Calibri,sans-serif">5.8
GHz UNII Upper</span></p>
</td>
<td style="width:129.8pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15.75pt" valign="bottom" nowrap width="173">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">5725.0MHz</span></p>
</td>
<td style="width:130.1pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15.75pt" valign="bottom" nowrap width="173">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">5875.5MHz</span></p>
</td>
<td style="width:202pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15.75pt" valign="bottom" nowrap width="269">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">Part 15.247
(b)(3) , (b)(4)</span></p>
</td>
<td style="width:136.6pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15.75pt" valign="bottom" nowrap width="182">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">36dBm</span></p>
</td>
<td style="width:191.35pt;border-style:none solid solid none;border-bottom:1pt solid rgb(149,179,215);border-right:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15.75pt" valign="bottom" nowrap width="255"><br></td>
<td style="width:0.3pt;padding:0in;height:15.75pt" width="0"><br></td>
</tr>
<tr style="height:15pt">
<td style="width:144.95pt;border-style:none none solid solid;border-left:1pt solid rgb(149,179,215);border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" nowrap width="193"><br></td>
<td style="width:129.8pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="173"><br></td>
<td style="width:130.1pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="173"><br></td>
<td style="width:202pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="269">
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">Part 15.407
(a)(3)</span></p>
</td>
<td style="width:136.6pt;border-style:none none solid;border-bottom:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="182"><br></td>
<td style="width:191.35pt;border-style:none solid solid none;border-bottom:1pt solid rgb(149,179,215);border-right:1pt solid rgb(149,179,215);padding:0in 5.4pt;height:15pt;background:none repeat scroll 0% 0% rgb(220,230,241)" valign="bottom" nowrap width="255"><br></td>
<td style="width:0.3pt;padding:0in;height:15pt" width="0"><br></td>
</tr>
</tbody></table>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"> </span></p><br></div><div><div><div><div><br>-- <br><div class="gmail_signature">Ben West<div><a href="http://gowasabi.net" target="_blank">http://gowasabi.net</a><br><a href="mailto:ben@gowasabi.net" target="_blank">ben@gowasabi.net</a><br>314-246-9434<br></div></div>
</div></div></div></div></div>