Nowadays, there is a growing demand for a faster and more effective network system, as internet becomes more and more important in our daily lives, and becomes an indispensable mechanism in the global networks infrastructure system. The emerging of Fiber To the Home (FTTH) network technology supply this demands, by providing more bandwidth and more flexibility between the transmission lines and the subscribers. Fiber drop cables are an essential element in the Fiber to the home (FTTH) networks. Selecting the appropriate FTTH drop cable interconnection solution directly influences the reliability and operational flexibility of the network. In the article, we will provide a comprehensive explanation about fiber drop cable and introduce some considerations when selecting fiber drop cables.
What is Fiber Drop Cable?
The fiber drop cables are design to make the connection between the distribution network points to the subscribers end. Normally, fiber optical drop cable is cable with a black and white out coating look, with a relatively small diameter, low fiber counts cables, and good flexibility. It contains no more than 12 core optical fiber placed along its butterfly-shaped cable, but that number varies according to the type of the drop cable. Fiber Drop cable can be installed underground, buried or be installed aerially. According to the industry standard this type of cables should have at least a 1335 Newtons pull strength, as it it mostly used in outdoor installation.
Why do we need fiber drop cable
Fiber Drop cable provides good physical performance in the FTTH network. Therefore, it is presented as a solution to supply the increasing demands for higher bandwidth and broadband of the fiber network. When we use the FTTH drop cable to make the distribution point to the subscribers, the optical signals are transmitted with minimum loss. The drop cable also provides a great installation and construction in various environments and weather. However, choosing the right type of drop fiber cable and the appropriate termination method during the FTTH network installation is crucial to build a good FTTH structure.
How to choose fiber drop cable?
There are several things that you should take into consideration when selecting a fiber drop cable, but the most important is the type of drop cable you should choose. There are different types of fiber optical drop cable to choose from and the three mostly used are: the flat type drop cable, figure-8 aerial drop cable and round drop cable.
- Flat type drop cable
Flat type drop cable, also called flat drop cable, are design with a flat out-looking, polyethylene jacket, numerous fibers and two dielectric strength members to provide a better and higher crush resistance. Unlike, the other types of fiber optical drop cable with one or two fibers, flat type drop cable contains no less than 12 fiber counts.
- Figure-8 aerial drop cable
Figure-8 aerial drop cable is a self-supporting fiber cable, designed for aerial installation, with the cable settled to a steel wire, it provides an easy and cheaper aerial installation in outdoor applications. Generally, Figure-8 fiber drop cable contains 2 to 48 fiber counts, and a tensile load of 6000 Newtons.
- Round drop cable
Round drop cable is designed with a single bed-insensitive fiber and buffered with dielectric strength members. It usually contains outer jackets, which give a better reliability and higher durability of the drop segment network.
Application methods and Termination methods
As already mentioned, fiber drop cable are an essential element in FTTH network. During the installation and construction of fiber optical drop cable system in FTTH network it is important to decide the more efficient and flexible application and termination methods to be used.
Fiber Drop cable can be installed underground, buried or aerial.
There are two termination methods to choose during the FTTH drop fiber cable installation: splice and connector. The splice method completely reduces any change of interconnection point in getting damaged or dirty with the permanent joint. The connector method is able to give an access point for the network testing. The splice method usually presents a better optical performance then the connector method. But the connector method has a higher operational flexibility then the splice method.
The splice method is recommended for the FTTH drop cables when the installation and the constitution of the network system doesn’t require adjustment. The connector method is recommended for applications where the cable may need to be rearranged and adjusted.
How to install fiber drop cable
One of the first steps in fiber drop cable installation process is to locate the best fiber path for the drop cable and settle the appropriate application method of the fiber drop cable. The aerial installation is preferable, for a better and efficiency and lowest cost installation. But in some area it is requires the underground installation.
After the that, we start working on the installation of the cable plant construction, where the fiber drop cable length runs from local network distributor to the slice point and then to the building (subscriber). A network interface device (NID) is placed on side of the building, following the drop cable application methods, and that will help to isolated the fiber drop cable.
The installation feeder and distribution cables usually obey the standard Outside Plan (OSP) installation. The distribution structure elements may follow the poles, trenches and conduit.
Post time: 2022-04-03