[Bloat] ESR's comment popped up on slashdot
David Collier-Brown
davec-b at rogers.com
Thu Oct 8 11:18:57 EDT 2015
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
davecb at spamcop.net | -- Mark Twain
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