水平子系統的光纖敷設與雙絞線非常類似，但光纖抗拉性能比雙絞線差，因此牽引時需更小心，曲率半徑也要更大。
垂直主幹子系統光纖用於連接設備間之各個樓層配線間，一般裝在電纜豎井或上升房中。
垂直主幹子系統光纖敷設時需注意：
◆ 為防止光纖下垂或滑落，每個樓層的槽道上中下地方，都必須將光纖牢牢固定;
◇ 用油麻封堵材料將光纖穿過的所有槽洞、管控的空隙部分堵塞密封，並採取加堵防火材料等防火措施，以達到防潮和防火效果。
◆ 敷設光纜時需預留5-10m的長度，如有特殊要求可適當延長。
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Indoor fiber wiring knowledge
Indoor optical fiber is mainly used for laying of horizontal subsystem and vertical backbone subsystem.
The optical fiber laying of the horizontal subsystem is very similar to the twisted pair, but the tensile performance of the optical fiber is worse than that of the twisted pair, so you need to be more careful when pulling, and the radius of curvature is also larger.
The vertical backbone subsystem optical fiber is used to connect each floor wiring room of the equipment, and is generally installed in the cable shaft or the rising room.
Pay attention to the installation of the optical fiber of the vertical backbone subsystem:
◆ In order to prevent the optical fiber from sagging or sliding, the optical fiber must be firmly fixed on the upper and lower places of the channel on each floor;
◇ Seal all the slots and controlled voids that the optical fiber passes through with oil and hemp plugging materials, and adopt fireproofing measures such as adding fireproofing materials to achieve moisture and fire prevention effects.
◆ The length of 5-10m should be reserved when laying the optical cable, and it can be extended if there are special requirements.
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