Huawei DBS3900 Installation Manual page 49

RRU3260
Installation Guide
Figure 7-6 Hoisting fiber optic cables onto the tower
(1) Lifting sling
Before hoisting fiber optic cables onto the tower, connect the fiber optic cables to the RU or
BBU based on the labels on both ends of the cables and determine the hoisting direction.
1.
2.
Issue 05 (2014-06-30)
After climbing up to the tower, installation engineer A secures the fixed pulley to the
tower platform support and leads the lifting sling through the fixed pulley.
Installation engineer B places the fiber coiler for coiling fiber optic cables on the fiber
spools, and installation engineer D lead the lifting sling through the stretch sling of the
fiber optic cables and use the other sling as a traction sling to secure the cables 4 m
(13.12 ft) away from the lifting sling, as shown in
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7 Hoisting an RU and Related Cables onto a Tower
(2) Fixed pulley
Figure
(3) Traction sling
7-7.
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