NOTE
l The procedure for installing an RRU is not described in this document. For details about how to install
an RRU, see the associated RRU installation guide according to the RRU model.
l The Outdoor Cable Conversion Box (OCB) is an optional component, which is used to connect cables
with different cross-sectional areas. For details about an OCB, see the OCB User Guide.
9.2 Installing an OMB
An OMB can be installed on a pole or wall depending on site requirements.
9.2.1 Installing an OMB on a Metal Pole
This section describes the procedure and precautions to be taken for installing an OMB on a
metal pole. An OMB can be installed on a metal pole outdoors.
Context
NOTE
l The cabinet cannot be installed at a height of more than 10,000 mm.
l The diameter of a metal pole for installing an OMB ranges from 60 mm to 140 mm.
Procedure
Step 1 Install upper brackets, as shown in Figure 9-2.
1. Install upper brackets on a metal pole, lead each M10x110 bolt through a spring washer,
flat washer, and brackets in sequence, and then use an inner hexagon wrench to secure them
until the tightening torque reaches 28 N·m.
2. Use a level to check whether the brackets are on a horizontal plane.
Figure 9-2 Installing upper brackets
(1) Flat washer
(2) Spring washer (3) M10x10 bolt
DBS3900 (Ver.B)
Installation Guide
9 Outdoor Scenario with DC Power Supply (BBU Installed
in an OMB)
Issue 06 (2011-09-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
291
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