Disadvantages of outdoor ADSS optical fiber cable

While outdoor ADSS (All-Dielectric Self-Supporting) optical fiber cable offers many advantages, there are also some disadvantages to consider. In this article, we will discuss some of the key drawbacks of outdoor ADSS optical fiber cable.

Higher Cost

One of the main disadvantages of outdoor ADSS optical fiber cable is that it is more expensive than other types of outdoor optical fiber cable. The all-dielectric design of the cable requires the use of expensive materials, such as aramid fibers and high-strength plastics, to provide the necessary mechanical strength and support.

The cost of ADSS optical fiber cable may also be higher due to the specialized installation and maintenance techniques required. The cable must be installed and maintained by trained technicians, and specialized tools and equipment may be needed.

Limited Span Length

Another disadvantage of outdoor ADSS optical fiber cable is its limited span length. The cable is designed to be self-supporting, which means that it must be able to withstand its own weight and the weight of the attached fibers over long distances. However, the maximum span length of ADSS optical fiber cable is limited compared to other types of outdoor optical fiber cable, such as OPGW (Optical Ground Wire) or OPGW hybrid cable.

The maximum span length of ADSS optical fiber cable is typically around 500 meters, which is significantly shorter than the maximum span length of OPGW or OPWG hybrid cable, which can be up to several kilometers. This can limit the use of ADSS optical fiber cable in long-distance applications, where longer span lengths may be required.

Vulnerable to Wind-Induced Vibration

Another disadvantage of outdoor ADSS optical fiber cable is that it is vulnerable to wind-induced vibration. The cable is designed to be self-supporting, which means that it relies on the tension of the attached fibers to maintain its shape and position. However, wind-induced vibration can cause the cable to oscillate, which can increase stress on the cable and cause damage to the fibers.

To mitigate this risk, ADSS optical fiber cable must be designed and installed with adequate clearance from surrounding structures, such as power lines or buildings, to minimize the impact of wind-induced vibration. Additional measures, such as the use of vibration dampers or clamps, may also be necessary to reduce the risk of damage.

Limited Mechanical Protection

Another disadvantage of outdoor ADSS optical fiber cable is its limited mechanical protection. The cable is designed to be lightweight and flexible, which means that it may not provide the same level of mechanical protection as other types of outdoor optical fiber cable, such as loose-tube or tight-buffered cable.

The lack of mechanical protection can make ADSS optical fiber cable more vulnerable to damage from external factors, such as impact, abrasion, or crushing. This can be a particular concern in areas with high levels of wildlife activity, such as forests or remote areas, where animals may chew on the cable or cause other types of damage.

Limited Compatibility with Existing Infrastructure

Another disadvantage of outdoor ADSS optical fiber cable is its limited compatibility with existing infrastructure. The all-dielectric design of the cable means that it cannot be used as a power conductor, which limits its compatibility with existing power line infrastructure.

This can be a particular concern in areas where space is limited or where there are restrictions on the installation of new infrastructure, as it may not be possible to install additional poles or structures to support the cable. This can limit the use of ADSS optical fiber cable in certain applications, such as in densely populated urban areas or in areas with limited access.