At present, the use of CDMA technology, ?Great Wall of China mobile communication network,? in Beijing, Shanghai, Guangzhou, Xi?an and other places open. CDMA is the latest development of digital network technology, and the United States is the birthplace of the most widely used. CDMA mobile voice clarity, close to the wired telephone, signal coverage, and not dropped calls. CDMA mobile cell phonewith advanced switching technology: soft switching technology, (ie well after the switch is to continue interrupted), making CDMA phones and fixed telecell phonecalls can be comparable; use the CDMA network operator?s investment decreased. Sometimes, different china cell phone jammer are suitable to different locations.
This reduction in tariffs for CDMA mobile cell phonereserved 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; based broadband technology of CDMA mobile communication video applications makes it possible to make cell phonecalls and send text from the only information service to the narrow bandwidth multimedia applications. GSM1X: the so-called GSM1X refers to the network supports two standard dual-mode handsets, mainly GSM / PHS and GSM / CDMA dual-mode cell phonetwo kinds. The flaw ofchina cell phone jammeris repairable.
GSM / GPRS greatly improves the speed of the Internet, including GSM / PHS cell phoneis the only Sanyo?s PDG-G1000 (that is, sales of Taiwan?s public telecommunications J100 and UT?s UT818), GSM / CDMA dual-mode handsets are mainly the domestic market, Samsung , LG and Motorola, three models. GSM1x as a technology solution to keep the existing China Unicom?s GSM SIM card service layer and user characteristics, based on the existing GSM users allowed to enjoy the enhanced benefits of CDMA 1X service. GSM1x focused on CDMA 1X and GSM-MAP?s advantage is the use of any frequency can be used for GSM operators to provide CDMA1X business solutions. Thechina cell phone jammercompany will conquer any difficulties.
GSM1x operators can maximize the use of the existing GSM-MAP network investment and keep the system can provide all major functions and operations. GSM1x can improve the operator?s voice and data capacity, while supporting a GSM network overlay CDMA 1X network, using SIM-based GSM / CDMA dual-mode handsets, and the promotion of cross-dual GSM and CDMA global roaming network. 3G: 3G is the third generation mobile communication technology, the next generation mobile communication system known. Standards are GSM / GPRS / WCDMA / EDGE / TD-SCDMA. 3G systems to provide users with a better voice, text and data services. The lead time ofchina cell phone jammerwill not exceed a week.
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. 3G technology standards: the International Telecommunication Union (ITU) as early as May 2000 that identified the W-CDMA, CDMA2000 and TD-SCDMA three mainstream 3G standards. WCDMA: WCDMA full name is (Wideband Code Division Multiple Access), the Chinese translation for ?broadband code division multiple access?, WCDMA from Europe and Japan, the integration of several technologies. It uses MCFDD duplex mode, and the GSM network has good compatibility and interoperability. The factory should describe the lead time of cell phone jammer in a clearer way.
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