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jrw14493
PostPosted: Sun Sep 20, 2009 2:50 pm 
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Interesting article regarding Multiple Frequency Disruptors (jammers) on scenes where a bomb may be detonated by a cell phone or a hostage with a possible cell phone they can't get rid of...

http://www.enforcementtech.com/flair/Ca ... 072109.pdf

article wrote:
And MFDs are designed not to interfere with the 434 MHz Public Safety Communications Frequency Band.


That's great if you are transmitting in that band...

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w1wso
PostPosted: Sun Sep 20, 2009 4:35 pm 
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And when responders try to use their wireless phones or workstations that use the same networks...

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commstar
PostPosted: Sun Sep 20, 2009 5:34 pm 
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Not if you flip the 'criminal traffic only' switch.

I read somewhere that some warden of a prison unwittingly shut down his own radio system trying to curb the use of illicit cell phones within the institution. Seems like it was in Canada.
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KE7JFF
PostPosted: Sun Sep 20, 2009 5:58 pm 
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commstar wrote:
Not if you flip the 'criminal traffic only' switch.

I read somewhere that some warden of a prison unwittingly shut down his own radio system trying to curb the use of illicit cell phones within the institution. Seems like it was in Canada.


Well, 434 MHz is used in Canada in LMR...

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TechnoWeenie
PostPosted: Mon Sep 21, 2009 1:49 am 
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Those systems are stupid...


All someone has to do is set up a bomb, and when the call DROPS , have it detonate the phone....

Call the police, tell them it's a cellphone activated bomb... The police themselves trigger the bomb using the device that's supposed to render it inoperative..

Evil, no?

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Wilrobnson
PostPosted: Mon Sep 21, 2009 5:13 am 
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...Unless the attached phone is T-Mobile, then you'd probably blow yourself up within the first 2 minutes...

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