FTTH (Fiber To The Home)

FTTH (Fiber To The Home) refers To The optical network units (ONU) installed in residential user or enterprise users place, optical access series FTTD (except The optical Fiber To desktop) outside closest To The user's light access network application type. The remarkable technical characteristics is FTTH not only offer more bandwidth, and enhance the network for data format, rate, the wavelength and agreement of transparency, eased restrictions on environmental conditions and electricity supply requirements, simplified the maintenance and installation.

Detailed introduction

Say to FTTH, it is first must be addressed fiber-optic access. Fiber-optic access refers to the bureau end and between users completely with fiber as transmission media. Fiber-optic access can be divided into active optical access and passive optical access. The main technical fiber user nets transmission technology is light. At present the reuse of the optical fiber transmission technology development are quite quick, most are already in practional utilization. According to the extent of the optical fiber deeply users, can be divided into FTTC, FTTZ, FTTF, FTTH FTTO, etc.

advantages

The advantage of FTTH is mainly five points: first, it is passive network, from among the bureau to users, basically can do passive, Second, it is relatively wide FTTH bandwidth

, long distance exactly the way; using the large-scale operators Third, because it is in fiber on business, so the load bearing and no questions, Fourth, because of its bandwidth compares broad, support agreement is more agile, Fifth, with the development of technology, including point-to-point, 1.25 G and FTTH way have formulated comparatively perfect function.

In optical access family, and FTTB (Fiber To The Building) Fiber To The Building, FTTC (Fiber To The dollar) Fiber To The Curb, FTTSA (Fiber To The Service Area) Fiber To The Service Area, etc.

The fiber directly connected to the user home, its bandwidth, wavelength and transmission technology species are no restrictions, suitable for introducing various new business, is the ideal business transparent network, is the ultimate way. Access network development

Although now mobile communication development at breakneck speed, but because of its bandwidth limited, terminal volume impossible too big, the display screen restricted factors, people still pursue performance relative dominant fixed terminal, is also the hope to achieve FTTH. The charm of FTTH is that it is of great bandwidth, it is to solve the information from the Internet backbone to user desktops "last kilometer" bottlenecks the optimal scheme.

Along with the technical renewal and FTTH cost reduced greatly, will soon be to and DSL and HFC network quite, this makes FTTH in practical application become possible. According to reports, as early as in 1997 Japan NTT company started to develop FTTH, after 2000 due to cost reduction and user large Numbers, The United States in 2002 after 12 months is the installation quantity of FTTH has increased 200 percent or more.

On the market FTTH, companies but far: the United States A T & T company did not look good in FTTH in OFC2004, this company think bandwidth isn't everything, development and application and content is the key, so at A time, the market is probably small FTTH, While American operators is more active Sprint Verizon, and, in OFC2004 introduced on their development plans and FTTH technical plan. In our country, FTTH is imperative, FTTH experiment nets has been in wuhan, chengdu and other cities in 2012, is expected to carry out before and after, in our country from coast to the mainland, from the east side to the west will rise FTTH an upsurge in building. Can say FTTH is a window of optical fiber communication, along with corresponding technology mature and practical, cost further reduced to family can afford level, FTTH big trend is unstoppable.

In addition, FTTH is used to solve the information superhighway in the "last mile" problem. FTTH + Ethernet than ADSL (ADSL dial-up again when will establish the highest theoretical 8Mbps download bandwidth, the bandwidth are never change. But actually because of ADSL noise testing mechanism if the situation is bad so initially established connection obviously cannot reach a theoretical, may eventually 5Mbps, the bandwidth is also not change.) And ISDN (European popularization telephone network forms) transmission much faster.