Typical application of CTI
◆ Phone voice card
Yellow to week
Phone voice card, exact One of the communication products. In just a few years, its application is from the initial "securities entrustment", gradually expanded to local and telecommunications, information services, office automation, financial, public security, medical care, business, entertainment, transportation, industrial production and social life. And will continue to develop at a faster speed. According to industry insiders, after 2 to 3 years of market penetration, China's telephone voice product application will usher in an unprecedented peak period - China's voice market, a very attractive and tempting vast world. The excavation of telephone voice technology is based on the development of communication and computer technology. The hardware design and support software of the second-generation telephone voice card contains many aspects of program-controlled switching technology, voice processing technology, digital signal processing and data storage technology, computer user interface technology, but the research process of telephone voice card at home and abroad is not That is the same. The development of foreign telephone voice cards is mainly focused on speech processing, but the telephone interface and program-controlled exchange function are slightly lacking. The development of domestic telephone speech cards, in technology (except for PC interface technology) mainly uses time division exchange technology, it can be said to evolve from the way of transformer switches, and thus exhibit a large advantage in telephone interface and switching. However, some manufacturers have done significantly in speech processing. At present, temporal exchange, speech compression, dedicated or general DSP technology and PC interfaces are very mature, and the corresponding chip and products at all levels are also suitable. Domestic powerful manufacturers have applied these technologies to the development and development of telephone voice products, forming third-generation telephone voice card products, allowing phone speech cards to be able to use themselves in various applications in China, while in technology International advanced or leading level. Market prospects are vast attractive, but competition is also very intense. Only those that have expanded, adapt to user needs, and constantly improve innovative manufacturers can seek space for survival and development. Foreign manufacturers are easy to make users look, and the signal standards of some products are in-time, and it is difficult to guarantee in time, and it is difficult to maintain, after-sales, after-sales technical support, it is difficult to maintain long-lasting in the Chinese market. vitality. Only manufacturers with early quality, still maintain a good potential. Due to the low cost, domestic manufacturers have a certain advantage in the price, but some manufacturers must gradually disappear because they cannot inspect market changes, or they are unreliable, and others are aiming at market demand, adjusting product structure in time, and improve performance. Quality, continuous improvement of soft, hardware technical support, so far it is still active in various applications. The product functions of such manufacturers have been quite perfect, and the use face is also quite extensive. It has been found in the domestic market, and has shown a stronger development momentum with its unique advantages. There are many companies that produce speech cards, and the products are also rich, such as Beijing Taixing Company's Turboway series phone voice card, Shenzhen Dongjin Company's TC-08A telephone voice card, Dialogic's various second-line, four-wire voice fax card, US NMS AG series speech card, etc. The stability of the product is one of the important basis for the user selection board. Due to the factors of design, device procurement, processing, etc., the performance of early partial speech card products is not stable, affecting the image of domestic speech card in the user. Thus, the domestically produced speech card is urgent to ensure the high performance and high quality of the product.
