[115379] in North American Network Operators' Group
Re: Wireless bridge
daemon@ATHENA.MIT.EDU (Charles Wyble)
Thu Jun 18 13:21:57 2009
Date: Thu, 18 Jun 2009 10:16:20 -0700
From: Charles Wyble <charles@thewybles.com>
To: Lyndon Nerenberg <lyndon@orthanc.ca>
In-Reply-To: <1245341463.1310.22.camel@legolas.orthanc.ca>
Cc: nanog@nanog.org, Peter Boone <NANOG@Aquillar.com>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
>
> 2.4 and 5GHz license-free Wifi is license free because the frequencies
> are shared with the ISM (Industrial/Scientific/Medical) services. In an
> industrial area, competing WiFi is the least of your worries. These
> frequencies are also used by industrial grade heating units. Got anyone
> in the neighbourhood running a large plastic shrink wrap machine, for
> example?
Good point.
>
> You can't directly detect these other users with a Wifi transceiver.
> Depending on the nature of the interference you *might* be able to hear
> it directly on a scanner (if you can find one that covers those
> frequencies), but you really need a good spectrum analyzer to tell
> what's going on.
Check out http://www.ubnt.com/airview/ for a decent one. There is also
wispy.
