The common leather fiber optic cable is a standard 8-shaped structure; there are two parallel reinforced cores with optical fiber in the middle; the self-supporting leather fiber optic cable adds a thick steel wire hanging wire on the structure of the common leather fiber optic cable; generally speaking, the self-supporting leather fiber optic cable is just one more steel wire, and the others are unchanged;
The structure of this kind of optical cable is different from each manufacturer. But they are not metal reinforced cores in general. Take butterfly cable as an example. The shape of the cross section is like a butterfly, so it is called. The two sides are leather wires, the inner part is reinforcement, and the middle part is optical fiber.
1. Butterfly optical cable is divided into indoor and indoor (indoor) and outdoor. The price difference between them is large. The price of outdoor type is about twice that of indoor type. The price factor should be considered when making specific design scheme. In general, ordinary optical cable (gyta-g652d) is still used outdoors, while indoor Butterfly optical cable is used indoors. They are transited through fiber distribution box or junction box.
2. Butterfly optical cable has the advantages of small curvature radius, light weight, relatively good bending resistance, easy fixation and termination in 86 terminal box.
3. There are two types of butterfly optical cable: non-metal reinforced component and metal reinforced component. Considering the factors of lightning protection and strong current interference, butterfly optical cable with non-metal reinforced component should be used indoors.
4. Indoor butterfly optical cable has 1-core, 2-core, 3-core and 4-core specifications. Single core cable is suitable for residential users to access butterfly optical cable; 2-4-core cable is suitable for commercial users to access butterfly optical cable.
There are cold connection and fusion connection.
Cold connection is to install the connector by preparing the end face of optical fiber and connect it with flange.
It is used for indoor wiring, and the end user uses cable directly;
It is used to introduce optical cable into buildings;
FTTH is used for indoor wiring.
YD / t1997-2009 optical cable for access network.