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General| Brand | Huawei |
|---|---|
| Model | BBU3900 |
| Category | Control Unit |
| Language | English |
Explains document symbols like DANGER, WARNING, CAUTION, TIP, and NOTE for risk communication.
Details formatting rules for text, file names, book titles, and terminal display.
Describes formatting for command lines, keywords, arguments, and optional parameters.
Defines formatting for GUI elements like buttons, menus, and parameters for clarity.
Explains how to use keyboard keys for operations, including single keys and combinations.
Details mouse actions such as click, double-click, and drag for user interaction.
Provides general safety precautions and explains DANGER, CAUTION, and NOTE symbols for accident prevention.
Covers safety precautions related to high voltage, thunderstorms, and electrical leakage.
Warns against operating devices in environments with flammable or explosive air or fog.
Details safety measures for handling, short-circuit prevention, and disposal of storage and lithium batteries.
Addresses hazards of high power radio-frequency signals and laser radiation from optical fibers.
Describes the BBU3900 equipment, including its appearance and internal boards/modules.
Lists and details various cables used with the BBU3900, including power, E1, and monitoring cables.
Introduces auxiliary equipment such as APM30 and DCDU-03B used with the BBU3900.
Outlines the key maintenance items associated with the BBU3900.
Provides instructions for powering on and powering off the BBU.
Details procedures for replacing various parts of the BBU, such as UBFU, UPEU, UEIU, GTMU, UELP, and optical modules.
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