Installation programmes of mobile phone jammers to prisons
Principle of mobile phone jammer
A. Brief introduction of handset:
Working principle of handset: In certain frequency band, handset connetc the base station with radiowave, and transfer data and sound by
certain band rate and modulation.
B.Brief introduction of mobile phones jammers:
The jammer scans the forward channel with the certain speed, from low frequency to high.This scanning will create the noise in the TX
signal, result that the handset can not receive the signal fromthe BTS, and disconnect with the BTS.From the handset, you will see
Searching\No signal\No service....
c. Main functions:
1. Can blockCDMA, GSM, PHS, 3G etceffectively.
2. Only block mobile phone signal, have no influence to any other electronic device.
3. Delay startup design, after connect the power supply, can work stably for a long time.
2. Summary
In information times, telecom technology grows rapiedly, mobile phones have become an necessary tool of people’s life and work.At the
same time, there are also some problems which can not be ingored, like:
1.1 become a new message leak way, to consititute the information safety.
With the development of technology, to position, track and detect the mobile phones have become the most important way to detect and
get information. Therefore, if you take a mobile phone in any secret locations, whether you use the mobile phones or not,it is possible to
to leak out secret. Do harm to individuals, units, political parties and countries.
1.2 become noise sorces, interfered normal work work.
Mobile phones are used every where, the envirnment of meeting rooms, court, libraries, schools are become worse, mobile phone noises
disturbed people’s normal life.
1.3 become a now unsafe factor, bring hidden defect to unit satety. If use mobile phones in gas stations, oil refinery, oil depot etc,it will
lead to fire disater or explosion, the consequence is very bad.
1.4 become a new way to crime, do harm to society stability. There is usually such a problem annoied the prisons and Detention House.
Prisoners use every means to get a mobile phone to communicate with the outside. To threat the witness and change the statement.Or to
communicate with the outside to go on perpetrating crimes. And some people use mobile phones to do exam cheatings and some
terrorists and hostile people use mobile phones to explode the bomb ete. Mobile phones have become tools to perpetrate crimes,do harm
to society stablity.Mobile phone jammers can solve the above problems effectively. As a new safety product, mobile phone jammer
transmit special electromagnetic signals to make a fence at the places where you want to block mobile phone signals. So the handset can
not comminicate with the base station, can not send or receive messages. To remove the bad effect of mobile phones.
2. Functions and Characters:
2.1 Functions:
Mobile phone jammers only block mobile phone signals, have no influence on any other electronic devices, no harm to human body, can
be used in many places.
2.1.1 All kinds of meeting rooms, halls, courts, libraries, examination rooms, schools, movie theatres, hospitals.
2.1.2 Gas stations, oil refinery, oil depot.
2.1.3 Government facilities, military, finance, negotiable securities, police, control center and any other places where mobile phones are
forbidden to use.
2.2 Charactres:
1. Our cell phone jammer use the most efficient RF chip on the market. The normal chip’s efficiency is only 30-40percent, our chip’s
efficiency reaches above 70percent, transform electric energy to most effective power, reduce calories.
2.Our jammer calculated at minimum efficiency, the effective power is 19W×70%=13.3W, the power of calories transformation is
19W×30%=5.7W. In the same way, the normal jammers’ average effective power is 14W, and the average calories transformation as
high as 26W. So our jammer is the most energy-efficient jammer, and have high efficiency, not hot, can live 3 times than our competitors,
have only 1/20 of mobile phone radiation, at the same time our jammers can block 3G mobile phone signals.
The manufacturing process obeys the ISO9001. The jammers work stablely. It is a safe, ideal, reliable product to ensure safe
manufacturing,to protect envirnment and to enhance information security.
3. Main functions and technical paraments
3.1 Main functions:
3. Main performance of mobile phone jammer:
3.1 Main performance:
1. Working frequency: 869MHZ-894MHZ, 925MHZ-960MHZ, 1805MHZ-1880MHZ, 1900MHZ-1925MHZ,2110MHZ-2170MHZ, can block mobile
phone signals, PHS, CDMA, GSM, 3G ect.
2 .Jamming coverage: 0M-70M ( jamming coverage is influenced by the distance from the cellular station to the jammer.
It is better to fix the jammer to the place whichi is father than 200 meters fromthe cellular station. )
3. The jammers do not block the uplink frequency of the base station,have no influence to the basestation.
4. Take use of our customized IC, which consume litter power, the temperation of the main body is10℃ lower than
jammers from other company. And can live 2 times longer than other jammers.
5. Radiation of the jammers is much less than the mobile phone, the jammers are really envir onmental protection product .Take lead
of our colleages.
3.2 Main technical paraments:
1. Five frequency bandcan block CDMA, GSM, DCS, PHS, 3G etc effectively.
2. Only block mobile phone signal, have no influence to any other electronic device.
3. It is advised to use mobile phone jammers more than 200 meters away from the base station.
Delay startup design, 4. After connect the power supply, can work stably for a long time.
3.1.5 Delay start up can prevent spark by mechanical switch..
3.1.6 Take lead of our competitiors to take use of voltage-stabilizing technology to increase voltage and reduce voltage take the lead to
settle the matter that mobile phone jammer signals decay with time,
3.2 Main technical paraments:
3.2.1 Effective jamming diameter: 0-70 meters. ( depending on the mobile phon signal strength, the stronger, the worse jamming effect.)
3.2.3 Frequency jamming Band:
CDMA: 869-894MHzGSM: 925-960 MHZ
DCS:1805-1880MHZ 1900-1990MHZ 3G:2110-2170MHZ
3.2.3 Work time: Work stablely for a long time.
3.2.4 Envirnment temerature: -40℃ to +50℃
3.2.5 Relative humidity: 30%-95%
3.2.6 Power adapter: Input AC 160V–240Voutput DC 5V
4. Installation programme:
1. tridimensional installation programme: Install one jammer on the outside eastern, western, northern, southern wall every 15-25
meters. The quantity depending on the longth and width of the building. If the building is higher than 3 floors, the installing way is the
same.Since that the jammers are installed outside the rooms, the jammers are required to be waterproof and anti-damage.
2. Installed in room programme: Install a mobile phone jammer in each jail room, it is easy to install, but need more
jammers, and cost more, the jamming effect is not quite good.
3. Install in corridor: Install one jammer every 10-15 meters on each corridor, the quantity depending on the length of the corridor.
If use this way, need to increase the quantity to get good effects, and may not quite convinent to install.You should take care when install
the jammers: 1. Take the directions of the antennasl to the open filed. ( It is advised that the directions of the antennas should to the
ceiling or other obstacles, and the antennas are 90° bend. 2. The power supply( equiped with the host) should be far from the host.
3. It is advised that there is no antennals go through the AC wire. 4. If does not install jammer on the first floor, but install the jammers
on the second floor, the antennas should be down to the open air.
Shenzhen GSH Technology Co.,Ltd.
TEL: 86-755-21843198
