In general, cable ties or steel buckles can be used for reasonable and effective fixation. Oil hemp plugging materials are also used to block and seal all the grooves and the gaps of the pipe holes that the optical cables cross on each floor in the project building, and fire safety measures such as adding fireproof materials should be adopted to achieve the effect of waterproof and fireproof safety. 

The outdoor optical cable is cleaned and tested. Before laying the optical cable, the pipe holes should be cleaned and tested section by section. When cleaning, use the authoritarian special cleaning tool, and use the test stick for test pass inspection after cleaning. The nominal diameter of the plastic sub-tube should be 1.5 times the diameter of the optical cable.

When wearing more than two plastic sub-pipes, if the pipes are of different colors, the ends may not be marked. If the pipe has the same color or no color, it should be marked on its end.

Outdoor cable traction. When the distance is exceeded, the method of pulling by section or lifting auxiliary pulling in the middle part should be used to reduce the supporting force of the optical cable and improve the working efficiency. In order to protect the surface of the optical cable from being damaged during the whole pulling process, when the optical cable passes through the pipe hole, the pipeline turns or crosses with other obstacles, protective measures such as guiding equipment or bell mouth maintenance pipes should be used.