SJSA-WTC™ adopts a single-layer jacket structure.
By revising the conventional two-layer jacket structure (double jacket single armor), the newly developed SJSA-WTC™ has a single jacket structure (see Figure 2) in which fibers are covered with a tube, instead of WTC™, then the tension members are in the outer jacket. This structure further reduces diameter and weight.
Furthermore, we have achieved high density without compromising the required mechanical strength (tensile strength, bending strength, and so on) by design optimization.
As a result, SJSA-WTC™ can be used in environments that require mechanical strength, such as along railway tracks, direct burial in soil, and rural or underground areas where there is a risk of wildlife damage by rodents. Additionally, the accessibility to optical fibers from cables by removing jacket is greatly improved compared to existing products.

As the data traffic continues to increase, urban areas are reaching saturation in terms of available space for cable installation.
SJSA-WTC™ enables to build telecommunication networks more efficiently in underground areas of urban regions and utilize the railway networks connecting cities and achieve the expansion and improvement of communication services in rural areas.
We will continue to develop high-quality and innovative products using advanced technologies to contribute to the construction of high-density communication networks in various environments while reducing environmental impact.

*2 Wrapping Tube Cable™ (WTC™)
The name of our proprietary technology for a slim and high-density optical fiber cable that incorporates SWR™. It is a simply structured fiber optic cable that covers the optical fiber ribbons with a wrapping tape. It has a slim and high-density structure compared to conventional fiber optic cables, such as slotted structures commonly used domestically in Japan and loose tube structures commonly used in many regions, allowing the use of existing conduits and significant reduction in installation time.