1. When the outdoor optical cable is directly buried, loose armored optical cable should be used. For overhead use, a loose-sheathed fiber optic cable with black PE outer sheath with two or more reinforcing ribs can be used.
2. When selecting the optical cable used in the building, the tight sleeve optical cable should be chose and attention should be paid to its flame retardant, toxic and smoke characteristics. Generally, the flame-retardant but smoke-free type (Plenum) or the flammable and non-toxic type (LSZH) can be used in the pipeline or forced ventilation, and the flame-retardant, non-toxic and smoke-free type (Riser) should be used in the exposed environment.
3. When cabling vertically or horizontally in the building, you can choose the tight-sleeve optical cable, distribution optical cable or branch optical cable that is common in the building.
4. Select single-mode and multi-mode optical cables according to network application and optical cable application parameters. Usually indoor and short-distance applications are dominated by multi-mode optical cables, and outdoor and long-distance applications are dominated by single-mode optical cables.
In the connection of optical fiber, how to choose different applications of fixed connection and active connection? The active connection of optical fibers is realized through optical fiber connectors. An active connection point in an optical link is a clear dividing interface. In the choice of active and fixed connections, the advantages of fixed connections are lower cost, less optical loss, but less flexibility, while active connections are the opposite.
During network design, it is necessary to flexibly select the use of active and fixed connections according to the conditions of the entire link, to ensure both flexibility and stability, so as to give full play to their respective advantages. The active connection interface is an important interface for testing, maintenance and changes. Compared with the fixed connection, the active connection is relatively easier to find the fault point in the link, which increases the convenience for the replacement of the faulty device, thereby improving the system maintainability and reducing the maintenance cost.
