Huawei DBS3900 Installation Manual page 181

DBS3900 (Ver.B)
Installation Guide
Figure 7-29 Installing a trapezoidal rack
(1) M12x60 bolt
Step 4 Remove the two plastic screws that are near the back of the cabinet from the top of the cabinet,
as shown in
Figure 7-30 Removing plastic screws
(1) Plastic screw
Step 5 Install a fastening bar on the top of the cabinet, and then use a socket wrench to tighten the two
bolts, as shown in
Issue 06 (2011-09-15)
(2) Spring washer
Figure 7-30.
Figure 7-31.
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7 Outdoor Scenario with DC Power Supply (BBU Installed
(3) Flat washer
in a TMC11H)
(4) Waterproof gasket.
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