The current digital mobile communication network through multiple access methods is FDMA, TDMA systems (GSM, DAMPS). Spectrum efficiency in the simulation system is about three times the capacity is limited; in voice quality 13kbit / s coding is also difficult to achieve the level of cable telephony, FTDMA comprehensive system of higher business, data and voice can be integrated, but the terminal access speed is limited (up to 9.6kbit / s TDMA system without soft switching, thus easy to dropped calls, affecting the quality of service z; TDMA system of international roaming agreement is subject to further refinement and development. which is not modern TDMA cellular mobile communications best wireless access, and CDMA code division multiple access technology perfectly suited to modern mobile communication networks require high-capacity, high-quality, integrated services, soft switching, international roaming and so on. A new unit ofcell phone jammerhas been developed for the commercial 3G cell phone jammer.
3G (3rd Generation) refers to third generation mobile communication technology, compared with the previous two generations of systems, third generation mobile communication system is characterized by providing a variety of mobile multimedia services, the transmission rate in high-speed mobile environment supports 144kb / s walk slow to support mobile environments 384kb / s, the stationary state support 2Mb / s. The design goal is to provide greater than the second-generation system system capacity, better communication quality, but also in global seamless roaming and better for the users, including voice, data and multimedia, etc. a variety of business, taking into account also the second-generation system with the existing good compatibility. This new type ofcell phone jammer only shields 3G signal.
If cell phone jammer adopts the wall hanging installation, ensure that there shouldn’t be heavy current wire around antenna of 3g cell phone jammer.
Line focus controller is relatively independent of the hardware box itself in addition to boxes in vitro, there is power input and a network cable, which, direct access to the power line input (ie, conventional power outlet, the power leads), direct connect cable host computer’s network card or LAN access unit. The figure above can be seen only by the controller in fact, the original series on the shielding and sockets (between power supply), place it in practical applications, making the construction very simple and clear, the original shielding device (regardless of any manufacturers of mobile phone shielding devices) without the need for hardware changes.
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