April 2nd, 2010 | Author: admin
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Optical Fiber and Cable: FTTH optical cable: the details of decision quality - optical fiber, optical fiber cable, optical networks - Industry Communications
Yangtze Optical Fiber Cable Co., Ltd. Zhu Xianfeng As part of the passive FTTH network, FTTH optical fiber cable, although not directly involved in the attention, but the architecture design and selection ODN is still in the FTTH optical network engineering and quality greatly. In FTTH networks, fiber optical cable product selection in the first place depends on network architecture planning ODN. That is, the central office OLT the client of the UN, which should be divided in several paragraphs. In determining the initial position of each paragraph, the paragraph in the product placement of fiber optic cable in the environment, efficiency facilities construction and wiring, such as the specific requirements in order to make better decisions. network planning ODN optical distribution network architecture is key to planning, depends on three basic elements, namely the establishment of OLT, the UN program distribution set and light settings. Among them, the program of distribution of light to create the greatest impact on the entire network structure, as distribution points of light can establish multi-way division of the network anywhere in the ODN. In the United States and Japan are two commonly used way to split with the characteristics residential of the two countries, labor costs, the method of construction of the network and other factors are closely related. In China Construction Communicate operator's network, usually in the form of coverage for the community. Therefore, the actual user community opening rate of return on investment of the project with greater impact. If the reference to foreign or more levels with two means of UV spectrophotometry, without opening the user is bound to the central office OLT and the splitter device Optical occupation produces invalid, so the burden of heavy initial investment. This will also allow the more complex network structure, increased construction, management, maintenance difficulties and costs. After years of practice and exploration, China's telecommunications operators have, basically established a relatively consistent with the situation of China's program to build FTTH network, the creation of the network for ODN has identified following guidelines: within a certain range, OLT located at the end as far as possible the current Bureau of the engine room, centralized management, UN should established in the home user, using local power, maximizing use of a spectrophotometric method, located in the center and as close as possible user. Major feature of this program is opened according to the actual user rate, reasonable control device and PON splitter investment. And, because the network structure is simple, the network reliability can be improved, but also greatly improved the construction, management and maintenance efficiency. Selection 1 cable products. Power cable feeder cable is actually part of MAN, under normal circumstances, the conduit and fiber optic cable on the tape is the type of application. But with the rapid growth of metro-scale construction, lack of channel resources is becoming a problem more difficult. In such circumstances, rainwater pipes cables, micro-blowing buried cable and cable and slot in domestic applications are increasingly common. In the city, provided that the place is inhabited, should be easily accessible by water pipes. rainwater pipes to install optical cables the foreign application has an earlier start, but the cost of similar products is very high, and the construction process is more complex. Micro-blowing the first company Dutch cable NKF first wire, because the pores of the use of greatly improved efficiency in the international market have more and more applications. The transformation project cell, some areas may require fiber optic cable through the square or street. Indirect costs will not be promoted, if the imposition of the excavation pipeline road construction traffic will be relatively large. Shallow grooves cable installation is very simple manner, just use the cutting machine on the way to build a light tank, the width of about 2 cm, depth of 10 centimeters, after the implementation of the filler on cable You can quickly complete the route of the connection work. 2. Wiring wiring wiring in the focus of the division, the core number is relatively large, harness the use of fiber optic cables, high density and relatively small diameter of the ribbon cable is a more appropriate choice. At the same time, Because of wiring along the corridor or a floor over fiber point differences, and therefore the efficiency of fiber optic cable that connects the differences and will certain requirements. In this regard, the advantage of the ribbon cable type skeleton is evident. First, because the type of cable used to dry water blocking structure, eliminating in the process of cleaning fibers connecting cream, ointment of this step greatly reduced the workload of construction can improve efficiency. Moreover, unlike cord when the ribbon cable skeleton style high-rise buildings in the corridor of the vertical laying, you can effectively avoid the ointment caused a leakage security risks. Meanwhile, the skeleton style fiber tape underneath the differences, the plaque is not left, had a spending cut. About the Author
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