Discussion:
Featured Image,FCC formalizes massive fines for selling, using cell-phone jammers
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Roy
2016-05-26 04:26:11 UTC
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http://www.networkworld.com/article/3075024/mobile-wireless/fcc-formalizes-massive-fines-for-selling-using-cell-phone-jammers.html
Peter Lawrence
2016-05-27 23:25:22 UTC
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Post by Roy
http://www.networkworld.com/article/3075024/mobile-wireless/fcc-formalizes-massive-fines-for-selling-using-cell-phone-jammers.html
It it legal to block cellular waves inside buildings by building Faraday
cages within the walls of the building?


- Peter
n***@sbcglobal.net
2016-05-28 19:17:51 UTC
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Post by Peter Lawrence
Post by Roy
http://www.networkworld.com/article/3075024/mobile-wireless/fcc-formalizes-massive-fines-for-selling-using-cell-phone-jammers.html
It it legal to block cellular waves inside buildings by building Faraday
cages within the walls of the building?
- Peter
I think one of the reasons some of us can't get good cellular reception inside our houses but okay outside is due to foil lined insulation. We are already living in Faraday cages. :-D
Peter Lawrence
2016-05-28 22:23:36 UTC
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Post by n***@sbcglobal.net
Post by Peter Lawrence
Post by Roy
http://www.networkworld.com/article/3075024/mobile-wireless/fcc-formalizes-massive-fines-for-selling-using-cell-phone-jammers.html
It it legal to block cellular waves inside buildings by building Faraday
cages within the walls of the building?
- Peter
I think one of the reasons some of us can't get good cellular reception inside our houses but okay outside is due to foil lined insulation. We are already living in Faraday cages. :-D
It's worse in some older homes and apartments that used chicken-wire
combined plaster of Paris for their interior walls.

:)


- Peter
Jeff Liebermann
2016-05-29 01:19:27 UTC
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Post by Peter Lawrence
Post by n***@sbcglobal.net
Post by Peter Lawrence
Post by Roy
http://www.networkworld.com/article/3075024/mobile-wireless/fcc-formalizes-massive-fines-for-selling-using-cell-phone-jammers.html
Think of this as revenue enhancement.
Post by Peter Lawrence
Post by n***@sbcglobal.net
Post by Peter Lawrence
It it legal to block cellular waves inside buildings by building Faraday
cages within the walls of the building?
- Peter
I think one of the reasons some of us can't get good cellular reception inside
our houses but okay outside is due to foil lined insulation.
We are already living in Faraday cages. :-D
It's worse in some older homes and apartments that used chicken-wire
combined plaster of Paris for their interior walls.
:)
- Peter
Sorta. Most lath and plaster walls use wood strips with gaps to hole
the plaster in place. The plaster has some water in it, so it will
attenuate some RF. However, ceilings need more support so they used
expanded metal lath and plaster construction:
<http://inspectapedia.com/interiors/Plaster_on_Expanded_Metal_Lath.php>
That blocks RF quite nicely. There's also stucco and chicken wire on
exterior walls. Inside, we have aluminum foil backed insulation in
the walls, floors, and ceilings. Some decorative wallpaper has an
aluminum foil backing.

I have to deal with one customers house that was custom designed and
built buy a former fire chief. The house is divided into 3 sections
upstairs plus one more downstairs. No RF gets between any of the
three sections. I have 4 wireless access points installed, one for
each section. Even the doors have metal inside (to prevent the spread
of fire).

Anything built after about 1995 in California has a Low-E (low
emissive) coating on all the glass windows, doors, skylights, etc. The
idea is to reflect UV and IR and still pass visible light.
<http://www.efficientwindows.org/lowe.php>
The problem is that most coating also block RF frequencies. Some
details on TiNi coating:
<http://802.11junk.com/jeffl/crud/Low-E-titanium-nitide-glass.pdf>

A few years ago, UCSC built 3 new buildings on the campus. To deal
with earthquakes, the fascia on new buildings needed reinforcement.
That's usually done with a welded wire mesh in the concrete fake brick
as backing or something similar. Yet another block to RF. UCSC
fortunately has a DAS (distributed antenna system) which was
configured to leak some RF inside the building so cellular would work.
--
Jeff Liebermann ***@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
David Kaye
2016-05-29 06:46:56 UTC
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Post by n***@sbcglobal.net
I think one of the reasons some of us can't get good cellular reception
inside our houses but okay outside
is due to foil lined insulation. We are already living in Faraday cages.
:-D
Indeed. That's the biggest problem I have in trying to set up wi-fi access
points in remodeled homes. I had one home where I had to set up 4 access
points, and it was a 2-story home in SF's Noe Valley.

Personally, I have no problem whatsoever with blocking signals in areas
controlled by a property owner or lessee. I'd like to see wi-fi and cell
service blocked in places like movie theaters and live theater venues where
people do disturbing things while the rest of us are trying to watch the
performance.
sms
2016-05-31 15:28:39 UTC
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Post by n***@sbcglobal.net
Post by Peter Lawrence
Post by Roy
http://www.networkworld.com/article/3075024/mobile-wireless/fcc-formalizes-massive-fines-for-selling-using-cell-phone-jammers.html
It it legal to block cellular waves inside buildings by building Faraday
cages within the walls of the building?
- Peter
I think one of the reasons some of us can't get good cellular reception inside our houses but okay outside is due to foil lined insulation. We are already living in Faraday cages. :-D
Blocking cell signals without active jamming is not illegal.

<http://www.lessemf.com/paint.html>. Only in black, but you can paint
over it. Probably intended for places like theaters and concert halls.

Someone on their web site says he uses it in the guitars he builds.
David Kaye
2016-05-31 18:49:48 UTC
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Post by sms
Someone on their web site says he uses it in the guitars he builds.
Yeah, with a lot of the guitar playing I've heard I wouldn't want it to get
out, either.

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