Principles and planning for the use of optical splitters
The split ratios of commonly used splitters are 1:2, 1:4, 1:8, 1:16, 1:32, 1:64. If necessary, you can also choose 2:N optical splitter or non-uniform splitting. Splitter. When configuring the optical splitter, the maximum utilization rate of each PON port and optical splitter of the equipment must be considered. According to the user distribution density and distribution form, the optimal optical splitter combination mode and suitable installation position must be selected. There are two principles for the use of optical splitters: one is to use first-level splitting as much as possible, and the other is that the number of splitting levels does not exceed two. There are three reasons for the use of first-level splitting: first, it can maximize the utilization of PON; second, it is convenient to diagnose faults; and third, the system has high reliability. So how to place the splitter?
(1) The first-level splitting method is adopted. When the optical splitter is in the resident network, the splitter can be installed indoors or outdoors. The indoor installation locations include the central computer room of the community, the weak current well in the building, and the floor line box. The upper connecting optical cables of the optical splitter can come from three ways, namely, the first-level optical junction box, the second-level optical junction box, or the optical fiber splitter box. This method is mainly suitable for the situation of large scale and high user density, such as high-rise residential buildings.
(2) If the secondary optical splitting method is adopted, the optical splitter can be installed on the backbone layer or the user distribution cable layer. When on the backbone layer, the splitter can be installed on the primary optical junction box, secondary optical junction box or Inside the optical fiber distribution box. This method is suitable for situations where users are relatively scattered and for newly-built user optical cable networks.
