The cable used in FTTH projects for fiber-to-home cabling inside (and outside) the building is called drop cable.

Application of DROP cable

This cable is used for installation inside and outside the building.Being LSZH or LSOH, the drop cable means the ability to resist ultraviolet rays and will not produce smoke or halogen due to burning.

The diameter of the drop cable is 2 or 3 mm.

Drop cable can be armored to prevent gnawing or stretching.

Stripping the drop cable is easy and its wires will be ready for fusion and OCDF in the FAT or ATB cassette box.

Types of drop cables:

1- Indoor
2- Outdoor

Indoor drop cable:

Indoor drop cable is used to communicate between the entry point of the building and inside the building units. This model is also called Building Drop Cable. Because this cable is not exposed to harsh conditions such as humidity, sunlight, heat, and cold, it has less strength than the Outdoor cable and is easier to install and operate. Indoor drop cable is divided into different categories of riser, microduct and connectorized cables.

Riser Drop Cable:

Cable drop riser provides the possibility of cable distribution throughout the building. This cable is used to connect the main fiber entry point on the ground floor to the upper floors. The structure of the optical fiber classification in this cable makes it easier to remove a core from it. The number of core fibers in this cable can be changed from 8 to 144, and it is usually placed in groups of 4, 6, or 12 with the G657A2 standard inside an outer cover.

Outdoor drop cable:

Outdoor drop cable is installed in aerial, channel and buried way.

According to the conditions of the external environment, this drop model can withstand a pressure of over 1000 newtons.

Outdoor drop cable has different types in terms of shape and internal structure.

The three outdoor drop cable models are as follows:

Flat Type drop cable:

Drop-felt cable has a relatively flat appearance and is usually made of a polyethylene sheath. There are two metal wires at the top and bottom of this cover that are responsible for strengthening the cable. This cable usually includes one or two fiber optic cores, but this number goes up to 12 cores.

Cable drop Figure-8:

Figure-8 drop cable is mostly used for aerial installation. Due to the presence of a solid steel wire, it is less flexible than flat cable. The similarity of the appearance of its cross-section with the number 8 has made this cable known as the Figure-8 drop cable.

Usually, the number of optical fibers in this type of cable is 2 to 48.

The pressure tolerance of this cable is about 6000 newtons.

Round Drop Cables:

This cable usually consists of a single fiber strand with bend-insensitive capability, which is surrounded by an inner cover for strength and an outer cover for pressure protection.