Huawei BBU3900 User Manual page 10

About This Document
3 Maintaining BBU3900 Hardware
After the site is put into use, routine maintenance on the BBU is required to ensure that it runs
properly in the long term.
Conventions
1. Symbol Conventions
The following symbols may be found in this document. They are defined as follows
Symbol
2. General Conventions
Convention
Times New Roman
Boldface
Italic
Courier New
3. Command Conventions
Convention
Boldface
Italic
[ ]
2
DANGER
WARNING
CAUTION
TIP
NOTE
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Copyright © Huawei Technologies Co., Ltd
Description
Indicates a hazard with a high level of risk that, if not avoided,
will result in death or serious injury.
Indicates a hazard with a medium or low level of risk which, if
not avoided, could result in minor or moderate injury.
Indicates a potentially hazardous situation that, if not avoided,
could cause equipment damage, data loss, and performance
degradation, or unexpected results.
Indicates a tip that may help you solve a problem or save your
time.
Provides additional information to emphasize or supplement
important points of the main text.
Description
Normal paragraphs are in Times New Roman.
Names of files,directories,folders,and users are in boldface. For
example,log in as user root .
Book titles are in italics.
Terminal display is in Courier New.
Description
The keywords of a command line are in boldface.
Command arguments are in italic.
Items (keywords or arguments) in square brackets [ ] are optional.
BBU3900 GSM
User Guide
Issue 04 (2008-09-05)