Problems related to laying and connection of optical

How to lay and connect optical cables? Many friends want to understand the problems in this area. Let's introduce them in two aspects. Cable laying 1. The laid optical cables must use qualified optical cables. 2. The optical cable hook uses a 25mm plastic bracket hook with a distance of 50cm. 3. Overhead optical cables are reserved for every 10 poles, the reserved amount is 10 meters each, and the coil diameter is 60cm. Each end of the incoming and outgoing office is reserved for 20 meters, and the optical cable connector is reserved for each of the rods at the front and rear of the connector box. 'U' telescopic bends are reserved for every 3 poles. The contact point of the optical cable is protected by a 20cm long corrugated tube. 50 ～ 80cm on both sides of the poles are tied with a single leather wire. The lowest point of the telescopic bend is 25- 30cm. Special sections (such as crossing rivers, bridges, etc.) are reserved according to actual conditions. 4. The upper part is protected by steel pipes. The ground part is not less than 2.5m, the underground part is not less than 0.5m, and the sub-pipes extend at least 1m from the hanging line and do drip bend treatment. The tube is bound every 50cm. 5. The crossing of overhead optical cables and power lines and other communication poles shall be protected by a special protective sleeve. The protective sleeve shall extend at least 1m from the edge of the power line and be used as a grounding device. 6. Warning issues: roadside poles should be painted with red and white paint, roadside cables should be installed with reflective tubes, roadside suspension wires should be installed with reflective plates (at least 4m) and publicity boards in the middle position, and other publicity boards are located at: Crossings, obstacles, joints, densely populated places, river crossing poles, joint poles, fiber optic cable reserved poles, distribution poles, and other areas are provided with a warning sign every 5 electric poles, and the optical cable warning sign has the word The side should face the road. 7. Identification issues: Hang signboards (entry station, ODF stand); Pigtail identification, the panel shows the fiber sequence comparison table (fiber number, chromatogram, peer station, peer fiber number). Fiber Optic Connection ??Optical cable connection is a key link in the construction of communication line projects. The quality of connection and installation will directly reflect the performance of communication transmission and affect the final quality of the entire project. 1. Fiber optic cable connection and test personnel can only work after they have received specialized technical training. 2. Before the connection, check whether the specifications, types, terminals, and core distribution of the optical cable meet the design document requirements. The optical cable connection must be monitored synchronously with OTDR, and problems should be handled in time. 3. The packaging of the junction box must be carried out in strict accordance with the process requirements provided by the supplier. 4. Insert the connection responsibility card into the joint device. 5. The bare loose tube at the end requires the optical fiber heat shrinkable tube for protection, and the length is moderate. 6. Fiber connector loss (two-way average) ≤ 0.08dB / each. 7. In this project, there are many paragraphs leading from the fiber optic cable junction box. Therefore, when the fiber optic cable core is continued to be constructed, the original fiber core resources need to be carefully verified and correctly connected to ensure communication security.