Selection and precautions of optical fiber and cable

The selection of optical cable in addition to the number of optical fiber core and optical fiber type, but also according to the use of optical cable environment to choose the structure of optical cable and outer sheath.

1, outdoor optical cable directly buried, it is appropriate to choose a loose set of armored optical cable. When overhead, you can choose the black loose sleeve optical cable with two or more reinforced PE outer sheath.

2, the optical cable used in the building in the selection should be selected with tight cable cable and pay attention to its flame retardant, toxic and smoke characteristics. Generally, the flame-retardant type (Plenum) or combustible non-toxic type (LSZH) can be selected in the pipeline or forced ventilation place, and the flame-retardant, non-toxic and smoke-free type (Riser) should be selected in the exposed environment.

3, the vertical or horizontal cable in the building, can choose the general tight cable cable, distribution optical cable or branch optical cable in the building.

4, according to the network application and optical cable application parameters to choose single mode and multiple mode optical cable, usually indoor and short distance applications mainly multi-mode optical cable, outdoor and long distance applications mainly single mode optical cable.

What should optical fiber pay attention to in the project design?

Optical fiber is getting closer and closer to the user terminal. What factors are the meaning of "optical fiber to the desktop" and what factors do we need to pay attention to in the system design?

"Fiber to desktop" in the application of horizontal subsystems, the relationship with copper cable is indispensable. Optical fiber has its unique advantages, such as long transmission distance, stable transmission, not affected by electromagnetic interference, high support bandwidth, will not produce electromagnetic leakage. These characteristics make optical fiber play an irreplaceable role of copper cable in some specific environments:

1. If the transmission distance of the information point is greater than 100m, if you choose to use the copper cable. You must add repeaters or add network equipment and weak currents, thereby increasing costs and potential failure problems, which can be easily solved by using optical fibers.

2. In the specific working environment (such as factories, hospitals, air conditioning rooms, power room, etc.), there are a large number of electromagnetic interference sources, optical fiber can be free from electromagnetic interference, stable operation in these environments.

3. There is no electromagnetic leakage of the optical fiber, so it is very difficult to detect the signal transmitted in the optical fiber. It is a good choice in places where the confidentiality levels are high (such as military, research and development, auditing, government, etc.).

4. In the environment with high bandwidth demand, reaching above 1G, optical fiber is a good choice.