12.1 Installation Clearance Requirements for a BBU
This section describes the installation clearance requirements for a BBU when it is installed in
a 19-inch rack in an indoor scenario with DC power supply.
Figure 12-1 shows the installation clearance requirements for a BBU installed in a 19-inch rack.
Figure 12-1 Installation clearance requirements for a BBU installed in a 19-inch rack
NOTE
l 25 mm on the left of the BBU is reserved for ventilation.
l 25 mm on the right of the BBU is reserved for ventilation.
l 70 mm in front of the BBU is reserved for cabling, and 800 mm in front of the BBU is reserved for
maintenance.
12.2 Installation Process
In an indoor 19-inch-rack-mounted scenario, you must install components and related cables in
a 19-inch rack.
Figure 12-2 shows the installation process.
DBS3900 (Ver.B)
Installation Guide
12 Indoor Scenario with DC Power Supply (BBU Installed in
a 19-Inch Rack)
Issue 06 (2011-09-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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