Application of ADSL networks drives ADSL-related technologies

DSL is not a new technology, but it has become a new technology in recent times. It has not only been widely used in the international market, but also attracted the attention of domestic operators, start large-scale network construction and commercialization. China Telecom, China Unicom, and China tietong all invest money to build the ADSL Network to varying degrees. At the same time, the related DSL technologies, including VDSL and HDSL, are becoming increasingly active and start to enter the market. In China's wave of man construction, Ethernet technology and DSL technology have been applied. However, experts believe that for the unbalanced market in China, DSL technology will play a greater role in breaking the bandwidth bottleneck of the fixed network. Practical broadband technology

ADSL is a practical broadband wireless access technology. The reason why it is "pragmatism" is that it is based on the full use of existing fixed network copper wire resources, achieve breakthroughs in bandwidth bottlenecks. This idea is very important for maintaining the original investment of the Telecom Network, which makes full use of this network.

The ADSL technology can become the mainstream technology for broadband fixed access for the following reasons. First of all, in recent years, the construction of the backbone network of China Telecom, especially the construction of optical fiber networks, has brought a high bandwidth to the transmission network, and the access end of China Telecom has become a bottleneck to limit the data rate, as a bandwidth extension of broadband telecommunication networks, DSL technology is necessary for commercial use. If the backbone network bandwidth is insufficient, even if the access part has a high bandwidth, it is difficult to meet people's high-speed requirements. Second, after several years of training, the Internet application market already has a large user base. However, in China, most users only have dial-up access, and the access speed is limited to within kbps. Users have become a real demand for high-speed Internet access. At the same time, some value-added broadband services have also been recognized by operators. Third, the rapid decline in profits in the traditional telecom operation market makes operators urgently need a value-added profit margin beyond ordinary narrowband telephone services, and broadband is regarded as the next wave of growth. It is undoubtedly tempting for carriers with traditional telecom networks to use DSL technologies promoted by the original network resources.

In the last round of man construction boom, China's broadband access technology mainly includes Ethernet technology and ADSL technology. Ethernet technology was once considered to be a technology with low investment, mature technology, and compliant with the network data trend. Therefore, this technology is used in some residential buildings. However, it turns out that Ethernet technology is more suitable for group users. When there are few connected users in the buildings covered by it, the average cost is much higher than expected. At the same time, due to the development restrictions of the IP technology itself, this technology still lacks support for traditional voice technology, and its security and manageability cannot meet the needs of operators. The DSL technology has matured over the past few years. Thanks to its support of fixed telephone networks, it is particularly suitable for large-scale commercial promotion, especially for individual users, this ensures the stability of the expected investment and the efficiency of investment recovery. In addition, the cost reduction of DSL products also plays an important role in promoting the commercialization of this technology. Targeted DSL Development

In China, the broadband market is just the beginning. It should be said that users have not yet formed the habit of using broadband. How to position the market, how to attract users to access broadband, and what services to do on the broadband network must be considered when building a DSL network.

At present, China's communication operators focus on developing ADSL technology and are also actively promoting the application of VDSL technology. Regarding market positioning, experts believe that different DSL technologies have different optimal user groups. Because of its asymmetric upstream and downstream transmission characteristics, ADSL technology is more suitable for high-speed Internet access. Therefore, it has a great advantage in the development of the public user market. For high-speed Internet access requirements of small business users, ADSL technology can also exert good potential. For VDSL technology, it can work in both asymmetric and symmetric ways. During VDSL asymmetric operation, the uplink speed is 1.6 to 2.3 Mbps, And the downlink speed can be up to 52 Mbps. During symmetric operation, the uplink and downlink speed can be up to 26 Mbps. VDSL is designed for users with high bandwidth requirements. Its end users include users in commercial parks, users in multi-unit residential buildings, college students, and hotel guests.

Some insiders believe that the price sensitivity of users is very high at the early stage of the market, however, they do not have the personal experience of the technology, which will bring some difficulties to the market. In response to this situation, we should adopt a low-threshold market breakthrough strategy. For example, we should adopt a low-cost or even free-of-charge strategy within a period of time so that the scale of broadband users can grow at a rapid speed. The formation of Broadband User scale will play a key role in the development and promotion of various value-added services and applications. In addition, providing better services is the source of market breakthroughs and sustained growth. This kind of business should have the characteristics of practicality and closeness. In Japan, where ADSL is well developed, carriers adopt a sales model that binds services and access services, which has been proven to have achieved good results.

During the construction of ADSL Broadband Access networks, we should consider the development of the entire broadband access network towards fiber-optic, digital, and integrated development, and solve the development of the integration of ADSL Access and fiber-optic access network FTTC, this is related to whether the investment can be effectively rewarded and protected. To build an ADSL Broadband Access Network, you must consider the future product upgrade capabilities and compatibility, and pay attention to the interconnectivity of different manufacturers' products. The product can be easily upgraded to the G. Lite standard. VDSL and other technologies can be considered in areas requiring high-speed communication without fiber access.