With the rapid development of information based economy in twenty-first Century, the FTTB+LAN has made considerable progress in the process of the information superhighway. When the IP technology matures, national each major and medium city began to build IP metropolitan area network, Shanghai Telecom launched in the construction of advanced technology, covering the city's broadband network quickly, one of the important technical basis is FTTX+LAN. Simply put, is the fiber to the building after the shop, the LAN technology will be twisted cloth five classes in each user's home, the user is concerned, no increase in what equipment is just a "information wall socket"; but is this little information to socket, each user can enjoy 10/100M the bandwidth of broadband connections, making thousands of households to become a reality, the Internet through a network cable, phone, VOD can easily achieve.
Features: high bandwidth utilization, low cost of investment. Network upgrade is convenient, can maximize the protection of the existing network investment. Bandwidth is shared, and the actual bandwidth of the households is limited by the number of concurrent users. A small number of broadband services can not be supported. Home line to more.
Suitable for the object: because of the use of fiber and 5 types of wire wiring, it has been built residential line reconstruction project is large, suitable for the new district.
FTTB (Fiber To The Building): fiber to the building, is a kind of broadband access way optimization of high speed optical fiber LAN based on the technology of fiber to the building, to achieve the network users of broadband access users, we call the FTTB+LAN broadband access network (FTTB), which is a kind of broadband access method the most reasonable and practical, the most economical and effective. FTTB broadband access to the community, is to achieve fast Gigabit LAN building high-speed network using single-mode fiber, ten trillion to the user. As FTTB is completely as a local area network, so the use of FTTB does not need to dial, and FTTB dedicated access to the Internet, as long as the user can access the boot INTERNET. FTTB access ISP certainly not like ordinary dial-up Internet so busy, the only difference between the FTTB fast or slow, will not have access to the busy situation, and because the Internet through FTTB and not through the telephone exchange network broadband access INTERNET, only take the cyber source, using FTTB to browse the Internet, no telephone charges.
FTTB, the requirements of the hardware and the common LAN requirements: the computer and the 10M Ethernet card, so the user is very little hardware investment. FTTB high-speed Internet users can not only enjoy the Internet of all business, query information through the Internet, to seek help, mail communication, e-commerce, stock operation, but also can enjoy the ISP also provided many broadband value-added services, remote education, remote medical treatment, interactive video (VOD, NVOD), interactive games, broadcast video and so on. Compared with HFC and FTTB can fully guarantee the bandwidth for each user, because each user end is exclusive 10M bandwidth.
FTTB as a high speed Internet advantage is obviously, we should also see the shortcomings, ISP must invest a lot of money to build a high-speed network to each user, thus greatly limits the popularization and application of FTTB, to really let the majority of Internet users can afford to need to do a lot of work.
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