Hello, everyone!
Today, I will continue to explain aerial optical cable installation. This is the last article about this theme. As I said in the three articles, today I will explain the process of aerial optical cable installation.
Installation of aerial optical cables (usually loose tube cables) can be done using existing old CATV or telephone cables, using messenger wire or using special installation elements. If we want to use messenger wire, we first need to design the type and dimensions - cross section and length of the wire. Messenger wire must provide the cable in all weather conditions - wind, ice in winter, etc.
Installation of aerial cables can be manual or mechanical traction, as we can see in the next figure.
Figure 1. Manual and mechanical traction
(HCIA-Access training material)
Cable installation can be done in two ways. In the first method, the cable reel moves and the cable is unwound and technicians mount the cable on the poles, using certain elements (figure 1.). When we have obstacles on the planned optical route (e. g. trees, etc.), we use another method. The cable reel does not move, the cable is unwound and the technicians pull the cable and install it on the poles.
During installation, a sufficient amount of optical cable should be left to create the optical closure. It is usually about 10-20 m. In addition, during the installation of the optical cable, a service loop is left at certain distances (e. g. 500 m). The project should anticipate all this. Also, a place where technicians will splicing should be provided.
Installed cables must be of the correct height. This is especially important for street crossings or major intersections or roads. In places where there is no traffic, a lower height is allowed. In general, no fiber optic cable should be accessible to ordinary people, which could damage it.
Figure-8 cables have messenger wire, and for this type of optical cable, we can not use special elements for installation. In the next figure, we can see the process of figure-8 cable installation.
Figure 2. Figure-8 optical cable
(HCIA-Access training material)
ADSS optical cables are loose tube cables, and today, they are very popular for aerial cables, because there are not any metal elements. Then, we can use this type in many applications. For ADSS installation, we have to use special elements. We can see it in the next figure.
Figure 3. ADSS optical cable
(HCIA-Access training material)
This is the end of this theme.
Thank you!
