| The development of radio technology in 30 years, | | | | encryption empty, empty Authentication) for |
| the simulation technology has become so mature, ?? | | | | specialized departments to effectively prevent |
| devices have been very reliable, can satisfy the | | | | outside attacks and hackers of unlawful interference; |
| Xianyoukehu the basic needs of consumers Qunti, Ke | | | | accurate gps global positioning technology to use for |
| Yi Shuo's development in multiple vertical industries | | | | the user's personal safety and timely response critical |
| made great contributions. However, with the | | | | juncture provides effective protection; unified |
| socio-economic and technological development, many | | | | dispatching operations to distance away to death, to |
| government departments, police, public safety, | | | | restore the terminal's work. |
| utilities, medical, fire and special departments of the | | | | With the cluster network in the world and rapid |
| mobile terminal has been made more professional, | | | | growth, digital terminal will be in the future |
| secure, stable, healthy, convenient requirements . | | | | development of large-scale use. According to |
| 20 years ago, some people abroad will be the | | | | European and American market research: in 2003, |
| introduction of digital technology, radio industry, | | | | digital radio and analog radio ratio is 2:8, the ratio |
| currently the most widely used worldwide, most of | | | | became 5:5 in 2004, forecast to 2007 the ratio will be |
| the digital trunking system users as the standard in | | | | 8:2. Authority of the State Department, according to |
| Europe and the United States iden tetra standard. | | | | forecasts, China's digital trunking system, the |
| End of 2000, Ministry of Information Industry has | | | | potential market demand of about 800-900 million |
| approved the two standard reference for our | | | | units in the mobile station, channel 14-15 million, up 50 |
| clusters on the standard, and announced China's | | | | billion yuan output value. Digital trunking network in |
| "digital trunking mobile communication system" | | | | which shared 10 years up to 4 million users. In terms |
| standard, allowing manufacturers to use and develop | | | | of international common estimation methods, ie the |
| our country such cluster systems and terminal | | | | professional mobile user mobile users one-tenth of |
| equipment. | | | | the public estimation, by 2010, China's public will be |
| 1, digital trunked radio and analog (conventional) radio | | | | more than 230 million mobile users, when the |
| comparisonDigital trunking radio and analog radio than | | | | professional mobile users will increase to 2000 - 30 |
| the voice clear and steady to receive call signals, | | | | million. In recent years, tetra trunking system has |
| digital radio for analog radio can not only basic | | | | been widely used in China's public security, |
| operations: a single call, group call and other functions, | | | | transportation, manufacturing, energy, water, social |
| also has a dispatcher verification calls, regional | | | | services, education, military, etc., the current projects |
| options, access priority, priority call, after the late | | | | under construction and build a total of 49, totaling |
| entry, pre takes precedence call, listening, dynamic | | | | about 700 million yuan RMB mainly in public safety and |
| restructuring, monitoring and other supplementary | | | | transportation industries. Some large and medium |
| service. In other words, the digital trunking radio can | | | | cities in China such as Beijing, Shanghai, Guangzhou, |
| provide richer types of business, better service | | | | Shenzhen, Nanjing, Chengdu and other cities have |
| quality, better privacy features, better connectivity | | | | already installed the cluster communication network, |
| and higher spectral efficiency. | | | | and experience the advantages of digital services to |
| Second, digital trunked mobile radio and civilian | | | | mobile terminals. This shows that digital trunked radio |
| comparisonAlthough the civilian world, the basic | | | | is the future direction of development of the wireless |
| business and to add mobile phone business has | | | | communications market in the world with the |
| diversified, the fastest transfer rate can reach 9.6kbit | | | | majority of potential users. |
| ? s to 2mbit ? s; but the user only for the general | | | | As the foreign in the cluster system of digital |
| users of mobile communication services, and by | | | | trunking terminal began earlier, after a long period of |
| market sales, manufacturing costs, can not satisfy | | | | accumulation of product development has been more |
| the other part of the special professional users of | | | | mature. Our manufacturer only learn the advanced |
| mobile terminals, high privacy, unified control | | | | experience of foreign countries, combined with its |
| capabilities.tetra digital trunking terminals can not only | | | | own characteristics in order to rapidly develop its |
| make the public network with telephone, data | | | | own digital radio products. Although the digital |
| transmission (short message, the state news report), | | | | trunking radio is good, but expensive development |
| caller ID and other services, but also radio calls, | | | | and testing environment, to other parts of the |
| listening, pre-accounting priority cell selection and | | | | country or the world (excluding Europe and the |
| other functions. Have tmo and dmo two modes of | | | | United States outside) to open up the market to |
| operation. In addition, the digital trunking radio's | | | | replace the simulator there are many way to |
| screen resolution, color, interface design can be | | | | go.Therefore, domestic demand in the current |
| personalized with the most popular mobile phone rival, | | | | circumstances, to determine the phase-out analog |
| a more perfect combination of the advantages of | | | | radio, digital machines to replace some other issues |
| mobile phones, but we can not simply say that digital | | | | still too early. Analog radio costs less mature and |
| trunking radio analog walkie-talkie and cell phone | | | | stable technology, you can basically meet the |
| combination. | | | | tourism, hotel, railway and construction industry |
| Such as tetra digital trunking terminal unique | | | | communications requirements in the domestic market |
| encryption technology (end to end encryption, | | | | still has a radio, most of our customers. |