Huawei DBS3900 Installation Manual page 139

DBS3900 LampSite
Installation Guide
(1) M4 threaded hole

For details about the clearance requirements, see 8.1.3 Space Requirements.
Issue 08 (2016-05-30)
Figure 8-21 Locking the protection screw
Installation on an overall suspended ceiling
This installation mode applies when the suspended ceiling (for example, made of plaster
board) cannot be removed.
a. Determine the position for installing the pRRU based on the construction blueprint
and the clearance requirements.
b. Use a crown saw to drill a hole with a diameter of 60 mm to 65 mm at the
installation position for the pRRU, as shown in Figure 8-22.
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(2) Hole for self-tapping screws
8 Installing a pRRU3902 or pRRU3911 or
pRRU3911+WIFI
(3) Quincunx screw
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