Smart Phone device portable shield

1. Brief Description In those forbidden areas, the conventional method for shielding the mobile telephone communication is to emit intense radiant noise in all directions continuously with a high-power barrage jammer. The LL-103 system has adopted a new operation manner to overcome the disadvantages of this traditional technique.The LL-103 system can simultaneously monitor communication signals of mobile telephones belonging to the GSM cellular networks of China Mobile, China Unicom and the CDMA cellular networks of China Telecom. According to the demand of the user and the definite area, the jammers of the system can be distributed and assembled flexibly to assure the coverage. Once opened, the jammer will be closed automatically in a pre-set time. The LL-103 system is characteristic of quick capturing, real-time alarming and precise positioning. It has intelligent processing ability and can be easily assigned to a given region scope. The LL-103 is especially suitable to be disposed to control focusing regions, and the systems in different regions can be linked to build a network. 2. Application and FunctionThe application of the system is monitoring illegal mobile telephone signals and takes action if necessary. The main function of the system isl Monitoring and holding mobile telephone signals belonging to GSM and CDMA cellular network in real time;l Capture the communication signals(including short message services) of mobile telephone in time; l Quickly positioning the mobile telephone on talking; l Jamming the mobile telephone on talking or sending short message in real time;l Displaying in the monitoring center the frequency spectrum of the captured communication channel;l Sending alarm to the monitoring center;Storing monitor-records to the database in the monitoring center for looking-up in future or printing as backup.