First, the network introduced
   
Advantages of CDMA network
 
FDMA and TDMA, compared with, CDMA has many unique advantages, one of which is inherent in spread spectrum communication system, and the other part is from the soft-switching and power control technologies. CDMA mobile communications network is a spread spectrum, multiple access, cellular network, and frequency reuse, such as a combination of several technologies, which contains the frequency domain, time domain and code domain three-dimensional signal processing of a collaboration, it has anti - interference, and anti-multipath fading, security safe, the same frequency can be repeated in a number of residential use, capacity and quality trade-offs between the attributes such as can be. These attributes than the other systems so that CDMA has a very important advantage.

     1, the system capacity. Theoretically use the same frequency resources, CDMA mobile network capacity than the analog network 20 times, the actual use of simulation Netbig than 10 times larger than 4-5 times GSM.

     2, system capacity and flexible configuration. In the CDMA system, the increase in the number of users equal to the increase in background noise, resulting in a decline in voice quality. However, no restrictions on the number of users, the operator may be the capacity and trade-off between voice quality. In addition, between the multi-residential traffic and interference can be automatically balanced.

     This feature of the mechanism and CDMA. CDMA is a self-interference system, all mobile users occupy the same bandwidth and frequency, an analogy, think of the bandwidth of a large house, all of them will be the only big house. If they use a completely different language, they can clearly hear the voices of his companions were only talking to some interference from others. Here, the house air can be think of broadband carrier, and different languages were used as encoding, we can continue to increase until the entire background noise users restrict us. If we can control the user's signal strength, while maintaining high-quality calls at the same time, we can accommodate more users.

     3, better call quality. CDMA vocoder system can dynamically adjust the data transfer rate, and in accordance with the appropriate threshold level choose a different class to launch. At the same time, according to background noise threshold of change varies, so that background noise, even in the case of larger, you can get a better call quality. In addition, CDMA system, "dropped calls" significantly reduced the phenomenon, CDMA systems use soft-switching technology, "first and then disconnect the connection" so hard to switch completely to overcome the shortcomings of dropped calls easily.

     4, frequency planning simple. User to distinguish between different code sequences, it is not the same CDMA carrier in the adjacent residential use, flexible network planning, expansion simple.

     5, to extend mobile phone battery life and power control using variable rate vocoder, the extension of mobile phone battery life.

     6, lower the cost of network building. CDMA network coverage, and high system capacity, fewer base stations required to reduce the cost of network building.
 
G basic characteristics of network and system functions:
 
      GSM basic characteristics:
      With a variety of public communications network interconnection, in particular compatibility with the ISDN, can provide more services, a variety of interface specification clear, digital network for the future development.
      GSM network structure to facilitate flexible, able to make more effective use of radio frequency interference is strong, communications quality, can provide very good voice quality.
      Use of authentication, voice encryption technology enables users of information security is assured.
      GSM system using the framework of all countries to provide automatic roaming across functional boundaries.
      User terminals, a smaller, lighter, more powerful.

      GSM system functions:
      GSM is a kind of voice, data, wide range of services, such as the replenishment of the operational system.
      GSM system voice business is the provision of basic services, allowing users anywhere in the world with fixed telephone users, mobile phone users as well as the private network links users to a two-way call. Derived from the telephone business is another voice mail, voice information storage, for debit extraction, in the call can not be connected, users can sound information into the GSM voice-mail; or direct access to voice mail.
      Provides a fixed data users and ISDN users can enjoy the most of their business, including text, images, fax, computer files, Internet access and other services.
     Supplementary services such as caller ID, call tracing, such as Short Message Service
 
 
Second, the company development process
    
        1. In August 1998 the company set up to determine the area to enter the wireless data transmission, full product development, production and sales,
In line with the CDMA / GSM Network in China's development status.
 
        2.2000 early in order to meet the company's development needs, combined with the development of China's telecommunications company into a comprehensive ISO9001: 2000 international quality certification system, in practical work in strict accordance with the provisions and achieve a stable product quality, technologically advanced, the price fair.
 
       3.2002 Companies 3C certification through the National Ministry of Information Industry.
       4.2007 Companies to develop a new development plan, within the next five years will be committed to build CDMA card products, at the same time to enter the field of 3G.
 
 
Three major enterprises
 
      1.2000 Companies with the best quality of service, product performance and stability, the company the credibility of the conditions for excellent stand out in the bid, made in Zhengzhou City, China Unicom and the long-term cooperative relations.
 
      2.2000 Zhengzhou Companies and co-operation relations between China Unicom, with the advantage of cost-effective products, one after another Unicom Shaanxi, Zhejiang Unicom established a cooperative relationship.
 
      3.2002 focus of the company will sell products from the CDMA to GSM product development, sales staff will work closely together, with the advantage of products and quality service, and Hebei Mobile has established long-term relations of cooperation.
 
      4.2007-year research and development company with extensive capabilities and professional communications technology, has won a number of leaders in Anhui Province to Mobile to visit your factory. Anhui Mobile finally designated procurement units.
 
      ~ 5.2008 in 2009, the entire sales team remains committed to the development of the domestic market and expand our wide range of telecommunications has Yunnan, Anhui Telecom, China Unicom, Telecom, Xinjiang and other provinces and cities in establishing a long-term friendly business cooperative relations with this At the same time, we open up overseas markets have also made successful progress, met with South Africa, India, Nepal, a number of companies have signed a cooperation agreement and a long-term partnership.