[aclug-L] Re: Off-Topic: Home security and cellular phones.

["Cavgalar, Alexandros (Alex)" <cavgalar@xxxxxxxxxx>]

Actually you can do this on your own. Before go any further please read the
following statement I put together.

This experiment was created by me to understand the theory of signal
transmissions and it had no purpose of hacking, cracking, and/or any other
illegal activities. However, it is considered to be so by FCC, FBI, and
local law enforcement authorities. That is why under any circumstances I
will not accept any liability to the illegal usage of the below experiment.

Now, here's how:
 
The Ultra High Frequency (UHF) signal transmission lines used by cell phones
range is between 823 MHz and 1692 MHz. However the bandwidths between 898
MHz and 920 MHz is blocked due to allocation for cordless phones,
communication base processors such as walkie talkies, cbs, even toys, and
some electronic equipments such as washers, dryers, hair dryers. What you
need to do is to first go to sears or best buy and buy a small portable TV.
Then set this TVs dial to range of 80 to 85 MHz where clear digital signal
plans for cellular systems are used. You will start listening to cellular
phone conversations of Sprint, Verizon, Cingular, etc. When you see a dead
band (a static noise) and no conversations heard, write the frequency range
down. Then, get a cell phone from ebay that will have a connection to your
PC. There are web sites that will adjust the firmware on the flash of the
cell phone. For example Sprint's cell vendor code (just like the vendor code
of part of the MAC addresses on the NICs) is 777468(it will spell sprint),
you will override this by putting the code 111111. This means, your phone
will create a cell packet very close to 911 calls but it will not create a
trace code like 911 calls do. Then whatever the device you are trying to
control with cell phone (such as your security system at home or turning the
microwave on, etc.) can be controlled or the signal can be sent to your cell
phone. 

There are sites to stuff I explained to you above. However, US Laws strictly
prohibits hacking, cracking, and especially over riding copyrighted and/or
patented materials. Not to mention breaking and entering electronically to
"Non-Public" sites. These can be (I am not saying it is but....) snooped by
law enforcement agencies and can be used against you. 
To avoid this type of headache, you can use an analog signal that uses
signal ranges open to public and easily create a software enabled encryption
system load in to your cell phone and your security system to get your
messages in these bands. Encryption will protect you and your signal
transmission. The only drawback of this method is to find a cell phone that
is either analog or with dual band.

Regards,

Alexandros Cavgalar



-----Original Message-----
From: David Carmichael [mailto:dec2955@xxxxxxxxxx]
Sent: Friday, August 09, 2002 4:17 AM
To: discussion@xxxxxxxxx
Subject: [aclug-L] Off-Topic: Home security and cellular phones.


Topic: Home security and cellular phones.

With many people in this group working for telephone service providers;

Does anybody in this newsgroup know of a device that will allow a home
security system connect to a cellular phone?

What I would really like to be able to do is to drop the monthly
service fee by using a pre-paid cellular service.
I am paying for a second phone line just to have our security system
connected to! In part due to the fact that I have DSL service and have
read that having a security system connected to the same phone line
can cause a drop in speed along with not having our main phone line
blocked by the security system when it makes its out bound phone
call... Along with the point locally many homes have been broken into
that have security systems.. but the intruders cut the phone lines
before entering the home.


--David
dec2955@xxxxxxxxxx




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