Solandri wrote, at
http://tech.slashdot.org/comments.pl?sid=8141531&cid=50686089
So based on a few vague comments, I managed to track down what the
issue is since neither this nor the previous/. article nor the sites
opposed to it (who seem to want to portray it as a Big Evil Government
conspiracy to take away your freedom) delve into it.
Several airports useTerminal Doppler Weather Radar
<https://en.wikipedia.org/wiki/Terminal_Doppler_Weather_Radar>[wikipedia.org]
for high-resolution maps of storms, rainfall, and most importantly
(for airports)microbursts
<https://en.wikipedia.org/wiki/Microburst>[wikipedia.org]. TDWR
operates at frequencies from 5.60 - 5.64 GHz. That's smack dab in the
middle of the5 GHz band used by 802.11a, n, and ac
<https://en.wikipedia.org/wiki/List_of_WLAN_channels#5.C2.A0GHz_.28802.11a.2Fh.2Fj.2Fn.2Fac.29.5B16.5D>[wikipedia.org].
You'll notice use of those specific frequencies (channels 120, 124,
128) are prohibited in the U.S. and Canada for this reason.
Based on that, it sounds like the issue is that you can buy a 5 GHz
device off the shelf, then hack the firmware to re-enable those
frequencies. And the FCC is proposing this action because people have
been doing exactly that and the FCC has received reports from the
airports of such interference on those frequencies.
If this is correct, it argues for various of our proposals and opens up
some new questions...
- is it a vendor that's scewed it up?
- was there a bad DD-WRT athe solution is enforcement... anyone
t any time?
--dave
--
David Collier-Brown, | Always do right. This will gratify
System Programmer and Author | some people and astonish the rest
[email protected] | -- Mark Twain
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