The bending insensitive fiber unit is positioned in the center. Two parallel steel wires as strength members are placed at both sides, then a black or colored LSZH jacket is extruded
 

Fibers are positioned in a loose tube that is made of high-modulus plastic and filled with tube filling compound. The water blocking tape is applied around the central tube. Then the tubes are armored with a corrugated steel tape (CST) logitudinally. Two parallel steel wires are embeded in LSZH jacket.
 

The fibers are positioned in loose tubes that are made of high-modulus plastic and filled with tube gel. The tubes (and fillers) are stranded around a metallic central strength member to form a cable core, which filled with water blocking compound. Then the core is armored with corrugated steel tape( CST) . Finally, a LSZH outer jacket is extruded
 

Fibres are housed in a loose tube that is made of high-modulus plastic and filled with tube gel. The tubes are armored with a corrugated steel tape (CST) logitudinally. Between the steel tape and the loose tube water-blocking material is applied to keep the cable compact and water-tight. Two parallel steel wires are embeded in the LSZH jacket.
 

The fibers are positioned in a loose tube made of high modulus plastic and filled with gel. Tubes (and fillers) are stranded around the metallic strength member to form the cable core filled with water blocking compound. Then the steel tape (CST) is longitudinally armored over the cable core and covered with a thin PE inner jacket. After the steel tape is armored over the inner jacket, the cable is completed with a LSZH outer jacket.
 

The fibers are positioned in loose tubes that are made of high-modulus plastic and filled with tube gel. The tubes (and fillers) are stranded around a metallic central strength member to form a cable core. The core is filled with water-blocking compound and then armored with laminated aluminum tape(APL). Finally, a LSZH outer jacket is extruded
 

The fibers are positioned in loose tubes that are made of high-modulus plastic and filled with tube gel. The tubes (and fillers) are stranded around a non-metallic central strength member(FRP) to form a cable core, filled with water blocking compound. Then a LSZH outer jacket is extruded.

The fibers are positioned in a loose tube made of high modulus plastic and filled with gel. Tubes (and fillers) are stranded around the metallic strength member to form the cable core filled with water blocking compound. Then the steel tape (CST) is longitudinally armored over the cable core and a PE inner jacket is extruded. Finally the cable is completed with a blue flame-retardant PVC jacket.
 

Self-supporting drop optical cable includes central optical fiber(s) with 2 parallel FRPs as the strength members placed on both sides,and an additional strength member(steel wire). Finally a LSZH jacket is extruded outside.