【正文】
l treatment, etc development direction of future optical fiber access Broadband is changed and prehensivized Broadband access is market development trends, fiber inhome will be broadband access inevitable. XDSL, dual bus integrated access as the transition plete fibre optic access technology, will play in the next few years broadband market protagonist. Future access to achieve a single platform with various business width of prehensive access, achieve business and network of separation, . to further to be changed to the broadband and integrated direction. Meanwhile fiber access network also must be able to support and other access flexible joint networking. To next generation network (NGN) of evolution Judging from the technical development, the traditional telephone network, data munications network and the technology of industry of cable television network three is gradually disappear, technology difference of fusion will further trigger network fusing, business fusion and industrial integration. Next generation network (NGN) are available including voice, data and multimedia and other business integrated, open network. The trend of its development can be summarized as: network equipment of ponents, network munication gateway change, access technology diversification, network management integration, terminal intelligent, business exchange control functions of separation and core network group. In the future of municationsnet NGN dominant, optical fiber access network will also after fusion to next generation network with them. Optical fiber access should be a continuous development, continuously innovative open system, access network equipment can through the corresponding signaling gateway and relay gateway will narrowband service access to NGN network, through the broadband data gateway will broadband access to NGN network. With the telemunications industry monopoly market disappear and telemunications business market opening, tele business functions, access technology unceasing enhancement, access is also associated with development, mainly displays in the following: The plexity of the access is increasing. Different access technology with prehensive petition between use, and require the support of large quantities of tele business such as the plexity of that access network increases. Access to expand in the scope of the services. Along with the development of munication technology and munications network, a local exchange capacity is expanding constantly, exchange, in decreasing number of small local in capacity, convert hubs and multiplex etc, it makes access network service scope expands unceasingly. The standardization level access is increasing day by day. In a local exchange gradually V5. Based on the open after X standard interface, tele operators more freely choose to access network technology and equipment. Access network should support a higherlevel business. The development of market economy, prompting mercial and corporate clients demand for greater capacity for the access lines, especially LAN interconnection data applications, demand reliability, short time limit of connection. Along with the optical fiber technology to users of the outspread, CATV network development to the user loop development brings opportunities. Support technology more diverse. Access Although currently in access the content of the optical transmission in growing, but how to make better use of the existing twistedpair cable will be taken into account, but to demand rapid construction of large capacity access lines, it can choose wireless link. Optical fiber technology will more applied to access. As fiberoptic coverage expansion, optical fiber technology will also increasingly used to access network, from development to the perspective, SDH, ATM, IP/DWDM currently only applies to trunk cable segment and digital transmitter interface, with the bureau of business development, fiber interface will further expand to the roadside, and finally into the home, truly realize broadband fiber access, realize unified broadband network structure, therefore, light will really bee the telemunications network information superhighway solid network foundation. 光纖接入網(wǎng)技術(shù) 整個電信網(wǎng)按網(wǎng)絡(luò)功能分為三個部分:傳輸網(wǎng)、交換網(wǎng)和接入網(wǎng)。蘭州交通大學(xué)畢業(yè)設(shè)計(英文參考翻譯)Optical fiber access network technologyThe entire telemunication network according to network function is divided into three sec