Ribbon Cable
2009
Optical Fiber and Cable: FTTH optical cable: the details of decision quality - optical fiber, optical cable, optical network - Communications Industry
Yangtze Optical Fibre Cable Co., Ltd. Zhu Xianfeng
As part of passive FTTH network, FTTH optical cable although no active part by the attention, but ODN architecture design and selection is still on the FTTH optical network engineering and quality greatly. In FTTH networks, fiber optic cable product selection, first of all depend on the ODN network architecture planning. That is, the OLT from the central office to the client the ONU, which should be divided into several paragraphs. In determining the starting position of each paragraph, the paragraph under the laying of fiber optic cable products in the environment, construction efficiency and wiring facilities, such as specific requirements in order to make more appropriate choices. Optical distribution network planning is key
ODN network architecture for the planning, depends on three basic elements, namely setting OLT, ONU distribution program set up and light settings. Among them, the light distribution program set up for the greatest impact on the entire network structure, as distribution points of light can be set up multi-way splitting the network anywhere in the ODN. In the United States and Japan are two commonly used way of splitting it with the residential characteristics of the two countries, labor costs, network construction mode and other factors are closely related. In China Communicate Construction of the 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 the greatest impact. If the reference to foreign or multi-level with two UV spectrophotometric means, without opening the user is bound to the central office OLT and the optical splitter device produces invalid occupation, making the burden of heavy upfront investment. This will also enable 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 FTTH network construction program, building the network for ODN has identified the following guidance: within a certain range, OLT Set in the end as far as possible the existing Bureau of the engine room, centralized management; ONU should be set in user home, using the local power supply; maximize the use of a spectrophotometric method, centrally located, and as close to the user. Greatest feature of this program is opened according to the user's actual rate, reasonable control device and in the PON splitter the investment. And, because the network structure is simple, the network reliability can be improved, but also greatly improved the construction, management and maintenance efficiency. Cable Product Selection 1. Feeder cable Feeder cable is actually part of MAN, in normal circumstances, the duct and ribbon fiber optic cable is more than the type of application. But with the rapid growth of metro-scale construction, pipeline shortage of resources is increasingly becoming a more difficult problem. In such circumstances, rainwater pipes cables, micro-blowing buried cable and cable and slot in domestic applications are more and more common. In the city, as long as the place is inhabited, it must be easily accessible by water pipes. Rainwater pipes to lay optical cable in 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 Dutch cable company NKF cable first, because the pores of the use of greatly improved efficiency in the international market have more and more applications. In cell transformation project, some areas may require fiber optic cable through the square or street. The overhead will not be promoted, if the laying of pipeline road excavation, construction traffic will be relatively large. Shallow slotted cable installation is very simple manner, just use the cutting machine on the road to construct a light tank, the width of about 2 cm, depth of about 10 centimeters, after the implementation of the filling into the cable, you can quickly complete the routing of the connection work. 2. Wiring cable Wiring cable wiring in the focus point of splitting, the core number is relatively large, use of fiber optic cable assembly, high-density and relatively small diameter of the ribbon cable is a more appropriate choice. At the same time, because of cable laying along the corridor or a floor under more fiber point differences, and therefore the efficiency of fiber optic cable connecting the differences and will have certain requirements. In these respects, skeleton-type ribbon cable's advantage is obvious. First of all, because the cable type used to dry water blocking structure, removed in the process of cleaning fibers connecting cream, ointment of this step greatly reduced the workload of the construction can improve the efficiency. Furthermore, unlike the cable, when the skeleton-style ribbon cable in high-rise buildings in the corridor of the vertical laying, you can effectively avoid the ointment caused a trickle of security risks. Meanwhile, the skeleton style fiber ribbon cable under the differences, the no plate left, played a cut expenditure.
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