Optical cable connection only pays attention to methods, procedures, etc. And never talk about connection features. However, the optical cable junction box has its own characteristics, which can be divided into straight-through type and bifurcated type according to the optical cable connection mode. According to whether the adapter can be assembled or not, it can be divided into assemblable adapter type and unassemblable adapter type. According to the classification of shell materials, it can be divided into plastic shell and metal shell. The optical cable junction box is classified as 1, and the material is durable and can resist various harsh environments. 2. Suitable for overhead, pipeline and directly buried optical cable projects. 3. It can be used for optical cable splicing projects with 12 cores, 24 cores, 48 cores, 72 cores, 120 cores and 144 cores or more. 4. Radius of curvature of optical fiber: 50mm. 5. Ambient temperature: -40℃? +60℃。 6. Atmospheric pressure: 70? 106 kpa.7. tensile strength > >1000 n n.8. Withstand voltage > 2000N/ 10 cm2 continuous 1 min. 9. 15KV(DC)/ 1min compressive strength does not break down and there is no arc discharge. Product characteristics of 10 and insulation resistance > 2×104mΩ optical cable junction box. Optical cable junction boxes are usually suitable for indoor or outdoor use, but not for outdoor use. If you want to use it, you should take protective measures. Working temperature: indoor type:-5℃ ~+40℃; Outdoor type: -20℃-+60℃. Product features: 1, low optical fiber transmission loss and low dispersion; 2. The reasonable design and accurate control of the excess length of optical fiber in loose tube make the optical cable have excellent mechanical properties and environmental properties; 3. Light weight and convenient laying; 4. Optical cable products have excellent flexibility and bending resistance, and are widely used in China Telecom, China Mobile, China Unicom, electric power, radio and television, transportation, education, aerospace, chemical industry, petroleum and other industries. Common sense of outdoor single-mode 4-core optical cable product selection, the selection of outdoor single-mode 4-core optical cable should be based not only on the number of optical fiber cores and optical fiber types, but also on the use environment of optical cable. The application of optical fiber network is very common. We should choose the optical cable with reasonable structure according to the specific construction requirements. For example, if the optical cable needs to be buried directly in the ground without crossing the pipe, overhead and directly buried, it is necessary to choose optical cables with different structures. Generally, there are GYXTW central bundle armored optical cable or GYTA loose stranded armored optical cable and GYTS stranded armored optical cable. Commonly used for overhead and through-tube armored optical cables, the directly buried metal heavily armored optical cables are generally of a stranded structure, such as GYTA53 loose-sheathed stranded reinforced core armored optical cable, GYTY53 single-set double-set directly buried optical cable, and nonmetallic optical cables in the field of power and industrial control, such as ADS power optical cable. According to the requirements of different optical fiber service lengths and required network bandwidth, the following multimode optical fibers 62 can be selected for the loosely stranded nonmetallic reinforced core optical cable of DCHTY. The gigabit length on the 5/ 125 core diameter shall not exceed 275m, 50. The gigabit length on the 5/ 125 core diameter shall not exceed 550m, and the gigabit length on the single-mode 9/ 125 core diameter is not limited. .......