re: cheap "femtocell"

[Dave Farber <dave () farber net>]

Begin forwarded message:

> From: David Josephson <dlj () josephson com>
> Date: January 8, 2010 8:01:59 PM EST
> To: dave () farber net
> Subject: Re: [IP] re:  cheap "femtocell"

> Dave,
>
> It is entirely possible that the Magic Jack femtocell could be  
> approved under Part 15 rules, which permit intentional radiators to  
> deliver 500 microvolts per meter at 3 meters (47 CFR 15.209), for  
> frequencies above 960 MHz. I would guess that they intend to use  
> only the 1800/1900 MHz GSM bands, which are not proscribed by the  
> restricted bands in 15.205, and measurements above 1 GHz need only  
> report average power rather than quasi-peak. That amount of power  
> isn't going to capture the signal from any nearby base station, but  
> it could certainly cover a small house as described.
>
> --
> David Josephson



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