Hello, everyone!
Today, I want to continue to explain a new topic – ODN engineering and maintenance. Now, I will start to explain ODN engineering. Today, the topic is traditional aerial cable routing.
Aerial installation is the most common way of implementing ODN networks in rural areas. It is also widely used in underdeveloped countries. The reason is the price - this is the cheapest way to implement the ODN network and in addition the fastest way to implement. Installation is realized on poles using special elements for fixing the cable. The installation of the optical cable can be manual or mechanical. In the manual installation, technicians loosen the pulley and fix the cable to the poles using special elements for this purpose. In the mechanical installation, the optical cable reel is located on a moving vehicle, and the optical cable is unwound, technicians fix the cable to the poles. This is a quick way but requires that the optical route has no obstacles. Otherwise, manual installation is used. During installation, attention should be paid to the minimum required height of the optical cable to prevent damage. Then, you should pay attention to the traction force, so as not to exceed it during installation.
Loose tube cables are used for aerial installation, most often ADSS and fig8. ADSS is the most popular, it is used mainly for the feeder and distribution segment. There are no metal elements, so it does not require grounding. Special elements are used to fix the cable to the poles. Fig8 is mainly used for drop optical cables. It has a metal messenger wire, which is also used to fix the optical cable to the poles. However, this fiber optic cable requires grounding.
Always leave a spare length of optical cable for splicing, which is about 20 m. In addition, about 40 m of spare fiber optic cable length is always left in case of an accident.
In the next two figures, we see the way of mounting fig8 and ADSS, with important facts. The first figure below shows Fig8. The last image shows the ADSS.
This is the end of this article. I will continue to explain this topic in the next article >> ODN Engineering and Maintenance (17).
Thank you!
