Parameter modification of cell phone jammer should be done in a short time

Currently, the mobile phone standard including GSM, CDMA, 3G three, since the advent of mobile phones has gone through a first-generation analogue phones (1G), second-generation GSM, TDMA digital mobile phones, etc. (2G), 2.5G mobile communication technology CDMA and third generation mobile communication technology 3G. GSM digital mobile communication system is a major European telecom operators and manufacturers designed the composition of the Committee for Standardization, which is based on the cellular system evolved. Including GSM900MHz, GSM1800MHz and GSM1900MHz and several other bands. The security is measuring the installation of cell phone jammer  down the hall.
GSM system has several important features: ability to copy good security, network capacity, number of resource-rich, call clarity, stability, strength less susceptible to interference, the information is sensitive, less dead phone, mobile and low power consumption. Is the abbreviation of Code Division Multiple Access CDMA (Code Division Multiple Access), which is a branch of the digital technology - spread spectrum communication technology to develop a new and sophisticated wireless communications technology. It can meet the demand for mobile communication capacity and quality of high demand, with high spectrum efficiency, voice quality, confidentiality, call drop rate is low, electromagnetic radiation is small, large capacity, wide coverage, etc., can significantly reduce investment and reduce operating costs.  cell phone jammer system can be controlled through the main computer of cell phone jammers .
3G is the third generation mobile communication technology, the next generation mobile communication system known. 3G systems to provide users with a better voice, text and data services. Compared with existing technologies in terms of, 3G technology, the main advantage is to greatly increase system capacity and improve communication quality and data transfer rate. Also take advantage of seamless roaming between different network technology, wireless communication systems and Internet connection up to the end user can provide more advanced mobile services. Compared to CDMA phones and GSM phones, CDMA mobile phone has the following advantages: CDMA mobile phone with advanced switching technology. The main computer is very important for cell phone jammer system.
Soft-switching technology (ie, well after the switch is to continue interrupted), making the CDMA mobile phone and fixed phone calls can be comparable; use the CDMA network operator's investment is relatively reduced, which lowered tariffs for CDMA mobile reserve a space; frequency due to adopt the extension of a communication-based modulation and multiple access communications, capacity 10 times higher than analog technology, about 4 times more than the GSM network; made based on the CDMA mobile broadband technology in video communication applications possible, so that phone calls and send text from the only information service in the narrow to broadband multimedia applications. Position selection of mobile phone jammer is very important.
GPRS --- General Packet Radio Service, General Packet Radio Service, is a system based on GSM wireless packet switching technology to provide end to end, wide-area wireless IP connection. More simply, GPRS is a high-speed data processing techniques, methods based on "group" in the form of sending data to the user's hand. Although the GPRS network as the existing GSM evolution to third generation mobile communication technology transition, but in many ways it has significant advantages. More installation position of cell phone jammer should be added.