The drop cable is also called the dish-shaped drop cable (for indoor wiring), which is to place the optical communication unit (optical fiber) in the center, and place two parallel non-metallic reinforcement members (FRP) or metal reinforcement members on both sides. Finally, extruded black or white , gray polyvinyl chloride (PVC) or low-smoke halogen-free material (LSZH, low smoke, halogen-free, flame retardant) sheathed. The outdoor drop cable has a self-supporting hanging wire in a figure-8 shape.
The drop cable is generally divided into 1 core, 2 cores and 4 cores single-mode fiber optic cable. Generally, a single core is used for household data transmission, and 2 cores are used for radio, television, cable TV and broadband.
drop cable optical fibers generally include G657A2 optical fibers, G657A1 optical fibers, and G652D optical fibers. There are two types of central reinforcements, metal reinforcements and non-metallic FRP reinforcements. Metal reinforcements include ① phosphating steel wire ② copper plated steel wire ③ galvanized steel wire ④ glued steel wire (including phosphated steel wire and galvanized steel wire with glue). Non-metallic reinforcements include ①GFRP②KFRP③QFRP.
The sheath of the drop cable is generally white, black, and gray. White is generally used indoors, and black is used outdoors, which is UV-resistant and rain-resistant. The sheath material includes PVC polyvinyl chloride and LSZH low-smoke halogen-free flame retardant sheath material. Generally, manufacturers divide LSZH low-smoke halogen-free flame retardant standards into three types: non-flame retardant, single vertical combustion flame retardant, and bundle flame retardant.
Outdoor optical cable suspension lines can generally be self-supporting 30-50 meters. Phosphating steel wire adopts 0.8-1.0MM, galvanized steel wire, glued steel wire.
Features of drop cable: special bending-resistant optical fiber, providing larger bandwidth and enhancing network transmission performance; two parallel FRP or metal reinforcements make the optical cable have good compressive performance and protect the optical fiber; the optical cable has a simple structure, light weight, and practicality Strong; unique groove design, easy to peel, convenient connection, simplified installation and maintenance; low smoke halogen free flame retardant polyethylene sheath or flame retardant PVC sheath, environmental protection. Can be matched with a variety of field connectors and can be field terminated.
Because of its softness and lightness, the drop cable is widely used in the access network; the scientific name of the drop cable: butterfly-shaped lead-in cable for access network; because of its butterfly shape, it is also called butterfly cable, Figure 8 cable. The product is used in: used for indoor wiring, direct cable used by end users; used to introduce optical cables in buildings; used for indoor wiring of users in FTTH.
