BBU3900 GSM V300R008
User Guide
Issue
04
Date
2008-09-05
Part Number
Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd
Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and service. For any assistance, please contact our local office or company headquarters.
Huawei Technologies Co., Ltd. Address:
Huawei Industrial Base Bantian, Longgang Shenzhen 518129 People's Republic of China
Website:
http://www.huawei.com
Email:
[email protected]
Copyright © Huawei Technologies Co., Ltd. 2008. All rights reserved. No part of this document may be reproduced or transmitted in any form or by any means without prior written consent of Huawei Technologies Co., Ltd.
Trademarks and Permissions and other Huawei trademarks are the property of Huawei Technologies Co., Ltd. All other trademarks and trade names mentioned in this document are the property of their respective holders.
Notice The information in this document is subject to change without notice. Every effort has been made in the preparation of this document to ensure accuracy of the contents, but the statements, information, and recommendations in this document do not constitute a warranty of any kind, express or implied.
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BBU3900 GSM User Guide
Contents
Contents About This Document.....................................................................................................................1 1 Safety Information.....................................................................................................................1-1 1.1 Safety Precautions...........................................................................................................................................1-1 1.2 Electricity Safety.............................................................................................................................................1-3 1.3 Inflammable Environment...............................................................................................................................1-5 1.4 Battery.............................................................................................................................................................1-5 1.5 Radiation.........................................................................................................................................................1-7 1.6 Working at Heights.........................................................................................................................................1-9 1.7 Mechanical Safety.........................................................................................................................................1-11 1.8 Others............................................................................................................................................................1-12
2 BBU3900 Hardware....................................................................................................................2-1 2.1 BBU3900 Equipment......................................................................................................................................2-2 2.1.1 Appearance of the BBU3900.................................................................................................................2-2 2.1.2 Boards and Module of the BBU3900.....................................................................................................2-2 2.2 BBU3900 Cables...........................................................................................................................................2-14 2.2.1 BBU3900 Cable List............................................................................................................................2-15 2.2.2 PGND Cable.........................................................................................................................................2-16 2.2.3 Power Cable.........................................................................................................................................2-16 2.2.4 E1 Cable...............................................................................................................................................2-17 2.2.5 E1 Surge Protection Transfer Cable.....................................................................................................2-19 2.2.6 Monitoring Signal Cable Between the APMI and the BBU................................................................2-21 2.2.7 CPRI Optical Cable..............................................................................................................................2-21 2.2.8 Alarm Cable.........................................................................................................................................2-22 2.3 BBU3900 Auxiliary Equipment....................................................................................................................2-23 2.3.1 APM30.................................................................................................................................................2-23 2.3.2 DCDU-03B...........................................................................................................................................2-24
3 Maintaining BBU3900 Hardware............................................................................................3-1 3.1 Maintenance Items of the BBU.......................................................................................................................3-2 3.2 Powering On and Powering Off the BBU.......................................................................................................3-2 3.2.1 Powering On the BBU............................................................................................................................3-2 3.2.2 Powering Off the BBU...........................................................................................................................3-3 3.3 Replacing the BBU Parts.................................................................................................................................3-4 Issue 04 (2008-09-05)
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Contents
3.3.1 Replacing the UBFU..............................................................................................................................3-5 3.3.2 Replacing a UPEU.................................................................................................................................3-7 3.3.3 Replacing the UEIU.............................................................................................................................3-10 3.3.4 Replacing the GTMU...........................................................................................................................3-11 3.3.5 Replacing the UELP.............................................................................................................................3-15 3.3.6 Replacing the Optical Module..............................................................................................................3-16
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Figures
Figures Figure 1-1 Wearing an ESD wrist strap...............................................................................................................1-5 Figure 1-2 Lifting a weight................................................................................................................................1-10 Figure 1-3 Slant angle........................................................................................................................................1-11 Figure 1-4 One meter higher than the eave........................................................................................................1-11 Figure 2-1 BBU3900............................................................................................................................................2-2 Figure 2-2 Typical configuration of the BBU3900..............................................................................................2-4 Figure 2-3 Panel of the UEIU...............................................................................................................................2-5 Figure 2-4 Panel of the GTMU............................................................................................................................2-6 Figure 2-5 Panel of the UELP ...........................................................................................................................2-10 Figure 2-6 DIP switch on the UELP .................................................................................................................2-11 Figure 2-7 Panel of the UBFA...........................................................................................................................2-12 Figure 2-8 Panel of the UPEA............................................................................................................................2-13 Figure 2-9 Panel of the UPEB............................................................................................................................2-13 Figure 2-10 PGND cable....................................................................................................................................2-16 Figure 2-11 Power cable.....................................................................................................................................2-17 Figure 2-12 E1 cable..........................................................................................................................................2-18 Figure 2-13 E1 surge protection transfer cable..................................................................................................2-20 Figure 2-14 Monitoring signal cable between the APMI and the BBU.............................................................2-21 Figure 2-15 CPRI optical cable..........................................................................................................................2-22 Figure 2-16 Alarm cable.....................................................................................................................................2-22 Figure 2-17 DCDU-03B.....................................................................................................................................2-24 Figure 2-18 Ports on the DCDU-03B panel.......................................................................................................2-25 Figure 3-1 Loosening the screws..........................................................................................................................3-5 Figure 3-2 Checking whether the UBFU runs normally......................................................................................3-6 Figure 3-3 Querying UBFU alarms......................................................................................................................3-7 Figure 3-4 Loosening the screws..........................................................................................................................3-8 Figure 3-5 Checking whether the UPEU runs properly.......................................................................................3-9 Figure 3-6 Querying the alarm information of the UPEU..................................................................................3-10 Figure 3-7 Loosening the screws........................................................................................................................3-11 Figure 3-8 Loosening the screws........................................................................................................................3-12 Figure 3-9 Checking whether the GTMU runs properly....................................................................................3-13 Figure 3-10 Querying the software version of the GTMU.................................................................................3-14 Figure 3-11 Querying GTMU alarms.................................................................................................................3-15 Issue 04 (2008-09-05)
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Figures
Figure 3-12 Loosening the screws......................................................................................................................3-16 Figure 3-13 Checking whether the CPRI signal transmission is resumed.........................................................3-18
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Tables
Tables Table 2-1 Board configuration principles of the BBU3900.................................................................................2-3 Table 2-2 Ports on the UEIU................................................................................................................................2-5 Table 2-3 LEDs on the GTMU.............................................................................................................................2-6 Table 2-4 Ports on the GTMU panel....................................................................................................................2-7 Table 2-5 Settings of S1.......................................................................................................................................2-8 Table 2-6 Settings of S2.......................................................................................................................................2-9 Table 2-7 Settings of S4.......................................................................................................................................2-9 Table 2-8 Settings of S5.......................................................................................................................................2-9 Table 2-9 Ports on the panel of the UELP..........................................................................................................2-10 Table 2-10 DIP switch on the UELP .................................................................................................................2-11 Table 2-11 LED on the UBFA...........................................................................................................................2-12 Table 2-12 LED on the UPEU............................................................................................................................2-14 Table 2-13 Ports on the UPEU...........................................................................................................................2-14 Table 2-14 Cable list...........................................................................................................................................2-15 Table 2-15 Pin assignment for wires of the -48 V power cable.........................................................................2-17 Table 2-16 Pin assignment for wires of the +24 V power cable........................................................................2-17 Table 2-17 Pin assignment for the wires of the 75-ohm E1 coaxial cable.........................................................2-18 Table 2-18 Pin assignment for the wires of the 120-ohm E1 twisted pair cable................................................2-19 Table 2-19 Pin assignment for the wires of the E1 surge protection transfer cable...........................................2-20 Table 2-20 Pin assignment for the wires of the monitoring signal cable between the APMI and the BBU......2-21 Table 2-21 Pin assignment for the fiber tails of the CPRI optical cable............................................................2-22 Table 2-22 Pin assignment for the wires of the alarm cable...............................................................................2-23 Table 2-23 Parameters for the ports on the DCDU-03B panel...........................................................................2-25 Table 3-1 Maintenance items associated with the BBU.......................................................................................3-2
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BBU3900 GSM User Guide
About This Document
About This Document
Purpose This document provides an overview of the BBU3900 GSM hardware for the planning and deployment of the BBU3900 GSM. It describes the BBU3900 GSM boards and modules, ports and related functions, categories of cables, and specifications and installation positions of the connectors. This document also presents various installation modes and maintenance information of the BBU3900 GSM.
Product Version The following table lists the product version related to this document. Product Name
Product Version
BBU3900 GSM(referred to as BBU3900 in this manual)
V300R008
Intended Audience This document is intended for: l
BBU3900 installers
l
Maintenance engineers
l
Technical support engineers
Change History For changes in the document, refer to Changes in BBU3900 GSM User Guide.
Organization 1 Safety Information 2 BBU3900 Hardware This describes the boards, modules, cables, and auxiliary equipment of the BBU3900 to provide reference for planning the deployment of the DBS3900. Issue 04 (2008-09-05)
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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
Description
DANGER
WARNING
CAUTION
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.
TIP
Provides additional information to emphasize or supplement important points of the main text.
NOTE
2. General Conventions Convention
Description
Times New Roman
Normal paragraphs are in Times New Roman.
Boldface
Names of files,directories,folders,and users are in boldface. For example,log in as user root .
Italic
Book titles are in italics.
Courier New
Terminal display is in Courier New.
3. Command Conventions
2
Convention
Description
Boldface
The keywords of a command line are in boldface.
Italic
Command arguments are in italic.
[]
Items (keywords or arguments) in square brackets [ ] are optional. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd
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About This Document
Convention
Description
{x | y | ...}
Alternative items are grouped in braces and separated by vertical bars.One is selected.
[ x | y | ... ]
Optional alternative items are grouped in square brackets and separated by vertical bars.One or none is selected.
{ x | y | ... } *
Alternative items are grouped in braces and separated by vertical bars.A minimum of one or a maximum of all can be selected.
[ x | y | ... ] *
Alternative items are grouped in braces and separated by vertical bars.A minimum of zero or a maximum of all can be selected.
4. GUI Conventions Convention
Description
Boldface
Buttons,menus,parameters,tabs,window,and dialog titles are in boldface. For example,click OK.
>
Multi-level menus are in boldface and separated by the ">" signs. For example,choose File > Create > Folder .
5. Keyboard Operation Convention
Description
Key
Press the key.For example,press Enter and press Tab.
Key1+Key2
Press the keys concurrently.For example,pressing Ctrl+Alt+A means the three keys should be pressed concurrently.
Key1,Key2
Press the keys in turn.For example,pressing Alt,A means the two keys should be pressed in turn.
6. Mouse Operation
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Action
Description
Click
Select and release the primary mouse button without moving the pointer.
Double-click
Press the primary mouse button twice continuously and quickly without moving the pointer.
Drag
Press and hold the primary mouse button and move the pointer to a certain position.
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1 Safety Information
1
Safety Information
1.1 Safety Precautions This section describes certain safety precautions and helps to choose the measurement device and testing device. Read and follow these safety precautions before installing, operating, and maintaining Huawei devices.
Following All Safety Precautions Before any operation, read the instructions and precautions in this document carefully to minimize the possibility of accidents. The Danger, Caution, and Note items in the package of documents do not cover all the safety precautions that must be followed. They only provide the generic safety precautions for operations.
Symbols
DANGER This symbol indicates that casualty or serious accident may occur if you ignore the safety instruction.
CAUTION This symbol indicates that serious or major injury may occur if you ignore the safety instruction. NOTE
This symbol indicates that the operation may be easier if you pay attention to the safety instruction.
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1 Safety Information
Complying with the Local Safety Regulations When operating the device, comply with the local safety regulations. The safety precautions provided in the documents are supplementary. You must comply with the local safety regulations.
General Installation Requirements The personnel in charge of installation and maintenance must be trained and master the correct operating methods and safety precautions before beginning work. The rules for installing and maintaining the device are as follows: l
Only the trained and qualified personnel can install, operate and maintain the device.
l
Only the qualified specialists are allowed to remove the safety facilities, and repair the device.
l
Any replacement of the device or part of the device (including the software) or any change made to the device must be performed by qualified or authorized personnel of Huawei.
l
Any fault or error that might cause safety problems must be reported immediately to the personnel in charge.
Grounding Requirements The following requirements are applicable to the device to be grounded: l
Ground the device before installation and remove the ground cable after uninstallation.
l
Do not operate the device in the absence of a ground conductor. Do not damage the ground conductor.
l
The unit (or system) must be permanently connected to the protection ground before operation. Check the electrical connection of the device before operation and ensure that the device is reliably grounded.
Safety of Personnel Ensure the following: l
When lightning strikes, do not operate the device and cables.
l
When lightning strikes, unplug the AC power connector. Do not use the fixed terminal or touch the terminal or antenna connector. NOTE
The previous two requirements are suitable for the wireless fixed terminal.
1-2
l
To prevent electric shock, do not connect safety extra-low voltage (SELV) circuits to telecommunication network voltage (TNV) circuits.
l
To prevent laser radiation from injuring your eyes, never look into the optical fiber outlet with unaided eyes.
l
To prevent electric shock and burns, wear the electrostatic discharge (ESD) clothing, gloves and wrist strap, and remove conductors such as jewelry and watch before operation.
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Device Safety l
Before operation, the device must be secured on the floor or other fixed objects, such as the walls and the mounting racks.
l
Do not block ventilation openings while the system is running.
l
When installing the panel, tighten the screw with the tool.
1.2 Electricity Safety High Voltage
DANGER l
The high voltage power supply provides power for running the system. Direct contact with the high voltage power supply or contact through damp objects may result in fatal danger.
l
Non-standard and improper high voltage operations may result in fire and electric shock.
l
The personnel who install the AC facility must be qualified to perform operations on high voltage and AC power supply facilities.
l
When installing the AC power supply facility, follow the local safety regulations.
l
When operating the AC power supply facility, follow the local safety regulations.
l
When operating the high voltage and AC power supply facilities, use the specific tools instead of common tools.
l
When the operation is performed in a damp environment, ensure that water is kept off the device. If the cabinet is damp or wet, shut down the power supply immediately.
Thunderstorm The following requirements are suitable only for the wireless base station or the device with an antenna or GPS antenna.
DANGER In a thunderstorm, do not perform operations on high voltage and AC power supply facilities or on a steel tower and mast.
High Electrical Leakage
CAUTION Ground the device before powering on the device. Otherwise, the personnel and device are in danger.
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1 Safety Information
If the "high electrical leakage" flag is stuck to the power terminal of the device, you must ground the device before powering it on.
Power Cable
CAUTION Do not install and remove the power cable with a live line. Transient contact between the core of the power cable and the conductor may generate electric arc or spark, which may cause fire or eye injury. l
Before installing or removing the power cable, turn off the power switch.
l
Before connecting the power cable, ensure that the power cable and label comply with the requirements of the actual installation.
Fuse
CAUTION To ensure that the system runs safely, when a fuse blows, replace it with a fuse of the same type and specifications.
Electrostatic Discharge
CAUTION The static electricity generated by the human body may damage the electrostatic sensitive components on the circuit board, such as the large-scale integrated circuit (LIC). In the following situations, the human body generates a static electromagnetic field: l
Movement of body parts
l
Clothes friction
l
Friction between shoes and the ground
l
Holding plastic in hand
The static electromagnetic field will remain within the human body for a long time. Before contacting the device, plug boards, circuit boards, and application specific integrated circuits (ASICs), wear a grounded ESD wrist strap. It can prevent the sensitive components from being damaged by the static electricity in the human body. Figure 1-1shows how to wear an ESD wrist strap. 1-4
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1 Safety Information
Figure 1-1 Wearing an ESD wrist strap
1.3 Inflammable Environment DANGER Do not place the device in the environment that has inflammable and explosive air or fog. Do not perform any operation in this environment. Any operation of the electrical device in the inflammable environment causes danger.
1.4 Battery Storage Battery
DANGER Before handling the storage battery, read the safety precautions for the handling and connection of the storage battery. Incorrect operation of storage batteries may cause danger. During operation, ensure the following: l
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Prevent any short-circuit. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd
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Prevent the electrolyte from overflowing and leakage.
Electrolyte overflow may damage the device. It will corrode the metal parts and the circuit boards, and ultimately damage the device and cause short-circuit of the circuit boards.
General Operations Before installing and maintaining the storage battery, ensure the following: l
Use special insulation tools.
l
Use eye protection devices and operate with care.
l
Wear rubber gloves and an apron in case of an electrolyte overflow.
l
Always keep the battery upright when moving. Do not place the battery upside down or tilt it.
Short-Circuit
DANGER Short-circuit of the battery may cause injury. Although the voltage of a battery is low, high transient current generated by short-circuit will release a surge of power. Keep metal objects away from the battery to prevent short circuit. If they have to be used, disconnect the battery in use before performing any other operation.
Harmful Gas
CAUTION l
Do not use unsealed lead-acid storage batteries, because the gas emitted from it may result in fire or device corrosion.
l
Lay the storage battery horizontally and fix it properly.
The lead-acid storage battery in use will emit flammable gas. Therefore, store it in a place with good ventilation and take precautions against fire.
High Temperature
CAUTION High temperature may result in distortion, damage, and electrolyte overflow of the battery. When the temperature of the battery exceeds 60oC, check whether there is acid overflow. If acid overflow occurs, handle the acid immediately. 1-6
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Acid
CAUTION If the acid overflows, it should be absorbed and neutralized immediately. When handling a leaky battery, protect against the possible damage caused by the acid. Use the following materials to absorb and neutralize acid spills: l
Sodium bicarbonate (baking soda): NaHCO3
l
Sodium carbonate (soda): Na2CO3
Antacids must be used according to the instructions provided by the battery manufacturer.
Lithium Battery
CAUTION There is danger of explosion if the battery is incorrectly replaced. l
Replace the lithium battery with the same or equivalent type recommended by the manufacturer.
l
Dispose of the used battery according to the instructions provided by the manufacturer.
l
Do not dispose of the lithium battery in fire.
1.5 Radiation Electromagnetic Field Exposure
CAUTION High power radio-frequency signals are harmful to human body. Before installing or maintaining an antenna on a steel tower or mast with a large number of transmitter antennas, the operator should coordinate with all parties to ensure that the transmitter antennas are shut down. The base transceiver station (BTS) has RF radiation (radiation hazard). Suggestions for the installation and operation of BTSs are given in the following section. Operators are also required to comply with the related local regulations on erecting BTSs. l
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The antenna should be located in an area that is inaccessible to the public where the RF radiation exceeds the stipulated value. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd
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1 Safety Information l
If the areas where RF radiation exceeds the stipulated value are accessible to workers, ensure that workers know where these areas are. They can shut down the transmitters before entering these areas. Such areas may not exist; but if they exist, the areas must be within a range of less than 10 m around the antennas.
l
Each forbidden zone should be indicated by a physical barrier and striking sign to warn the public or workers.
Laser
CAUTION When handling optical fibers, do not stand close to, or look into the optical fiber outlet with unaided eyes. Laser transceivers or transmitters are used in the optical transmission system and associated test tools. Because the laser that is transmitted through the optical fiber produces a small beam of light, it has a very high power density and is invisible to human eyes. If a beam of light enters the eye, the retina may be damaged. Normally, staring into the end of an unterminated optical fiber or broken optical fiber with the unaided eyes from a distance of more than 150 mm [5.91 in.] will not cause eye injury. Eyes may, however, be damaged if an optical tool such as a microscope, magnifying glass or eye loupe is used to stare into the bare optical fiber end. Read the following guidelines to prevent laser radiation: l
Only the trained and authorized personnel can perform the operation.
l
Wear a pair of eye-protective glasses when you are handling lasers or optical fibers.
l
Ensure that the optical source is switched off before disconnecting optical fiber connectors.
l
Never look into the end of an exposed optical fiber or an open connector if you cannot ensure that the optical source is switched off.
l
To ensure that the optical source is switched off, use an optical power meter.
l
Before opening the front door of an optical transmission system, ensure that you are not exposed to laser radiation.
l
Never use an optical tool such as a microscope, a magnifying glass, or an eye loupe to look into the optical fiber connector or end.
Read the following instructions before handling optical fibers:
1-8
l
Only the trained personnel can cut and splice optical fibers.
l
Before cutting or splicing an optical fiber, ensure that the optical fiber is disconnected from the optical source. After disconnecting the optical fiber, use protecting caps to protect all the optical connectors.
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1 Safety Information
1.6 Working at Heights CAUTION When working at heights, ensure that the objects do not fall. When working at heights, ensure that the following requirements must be met: l
The personnel who work at heights must be trained.
l
The operating machines and tools should be carried and handled safely to prevent them from falling.
l
Safety measures, such as wearing a helmet and a safety belt, should be taken.
l
In cold regions, warm clothes should be worn before working at heights.
l
Ensure that the lifting appliances are well prepared for working at heights.
Lifting Weights
CAUTION Do not access the areas under the arm of the crane and the goods in suspension when lifting weights. l
Ensure that the operators have been trained and qualified.
l
Check the weight lifting tools and ensure that they are intact.
l
Lift the weight only when the weight lifting tools are firmly mounted onto the weightbearing object or the wall.
l
Use a concise instruction to prevent incorrect operation.
l
The angle between the two cables should be less than or equal to 90o in the lifting of weights (See Figure 1-2).
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Figure 1-2 Lifting a weight
Safety Guide on Ladder Use Checking the Ladder l
Check the ladder before using it. Check the maximum weight that the ladder can support.
l
Never overload the ladder.
Placing the Ladder l
The slant angle is preferred to be 75o. The slant can be measured with the angle square or with arms, as shown in Figure 1-3. When using a ladder, place the wider end of the ladder on the ground and take protective measures on the base of the ladder against slippage. Place the ladder on a stable ground.
When climbing the ladder, ensure the following: l
The gravity of the body does not shift from the edge of the ladder.
l
Keep balance on the ladder before performing any operation.
l
Do not climb higher than the fourth highest step of the ladder.
If you tend to climb to the roof, the length of the ladder should be at least one meter higher than the eave, as shown in Figure 1-4.
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Figure 1-3 Slant angle
Figure 1-4 One meter higher than the eave
1.7 Mechanical Safety Drilling
CAUTION Do not drill on the cabinet without permission. Inappropriate drilling on the cabinet may damage the electromagnetic shielding and internal cables. Metal shavings from the drilling may result in a short-circuit of the circuit board if they get into the cabinet. l
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Before drilling a hole on the cabinet, remove the cables from the cabinet. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd
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During the drilling, wear blinkers to protect your eyes.
l
During the drilling, wear the protective gloves.
l
Prevent the metal shavings from getting into the cabinet. After drilling, clean the metal shavings in time.
Handling Sharp Objects
CAUTION When carrying the device by hand, wear the protective gloves to prevent injury by sharp objects.
Handling Fans l
When replacing a component, place the component, screw, and tool at a safe place to prevent them from falling into the running fan.
l
When replacing the ambient equipment around the fan, do not place the finger or board into the running fan until the fan is switched off and stops running.
Moving Heavy Objects Wear the protective gloves when moving heavy objects.
CAUTION l
Be careful when moving heavy objects.
l
When moving the chassis outwards, be aware about the unfixed or heavy objects on the chassis to prevent injury.
l
Two persons should be available to move a chassis; one person must not move a heavy chassis. When moving a chassis, keep your back straight and move stably to prevent a sprain.
l
When moving or lifting a chassis, hold the handle or bottom of the chassis. Do not hold the handle of the installed modules in the chassis, such as the power module, fan module, or board.
1.8 Others Inserting and Removing a Board
CAUTION When inserting a board, wear the ESD wrist strap or gloves. Insert the board gently to prevent any bent pins on the backplane.
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Insert the board along the guide rail.
l
Avoid contact of one board with another to prevent short-circuit or damage.
l
Do not remove the active board before powering off.
l
When holding a board in hand, do not touch the board circuit, components, connectors, or connection slots.
Bundling Signal Cables
CAUTION Bundle the signal cables separately from the strong current cables or high voltage cables.
Cabling Requirements At a very low temperature, movement of the cable may damage the plastic skin of the cable. To ensure the construction safety, comply with the following requirements: l
When installing cables, ensure that the environment temperature is above 0oC.
l
If cables are stored in the place below 0oC, move the cables into a place at a room temperature and store the cables for more than 24 hours before installation.
l
Move the cables with care, especially at a low temperature. Do not drop the cables directly from the vehicle.
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2 BBU3900 Hardware
2
BBU3900 Hardware
About This Chapter This describes the boards, modules, cables, and auxiliary equipment of the BBU3900 to provide reference for planning the deployment of the DBS3900. 2.1 BBU3900 Equipment The BBU3900 is used for baseband processing and enables interaction between the BTS and the BSC. 2.2 BBU3900 Cables The BBU3900 cables are classified into the PGND cable, power cable, E1 cable, E1 surge protection transfer cable, monitoring signal cable between the APMI and the BBU, CPRI optical cable, and BBU alarm cable. 2.3 BBU3900 Auxiliary Equipment The BBU3900 auxiliary equipment consists of the APM30 and the DCDU-03B. You can choose one or more types of auxiliary equipment when installing the BBU3900.
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2.1 BBU3900 Equipment The BBU3900 is used for baseband processing and enables interaction between the BTS and the BSC. The primary functions of the BBU3900 are as follows: l
Providing physical ports for the communication between the BTS and the BSC
l
Providing CPRI ports for the communication with the RF modules
l
Providing USB ports for downloading the BTS software
l
Providing the OM channel for connection with the LMT or the M2000
l
Processing uplink and downlink data
l
Providing centralized management on the entire DBS system, such as OM and signaling processing
l
Providing the reference clock for the system
2.1.1 Appearance of the BBU3900 The BBU3900 is a small box with all the external ports on the front panel. 2.1.2 Boards and Module of the BBU3900 The BBU3900 boards consist of the UEIU, GTMU, UELP and UPEU; and its module is the UBFA.
2.1.1 Appearance of the BBU3900 The BBU3900 is a small box with all the external ports on the front panel. Figure 2-1 shows the BBU3900. Figure 2-1 BBU3900
2.1.2 Boards and Module of the BBU3900 The BBU3900 boards consist of the UEIU, GTMU, UELP and UPEU; and its module is the UBFA. 2.1.2.1 Board Configuration of the BBU3900 This describes the board configuration of the BBU3900. 2-2
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2.1.2.2 UEIU Board This describes the Universal Environment Interface Unit (UEIU) board of the BBU3900. The UEIU transmits monitoring signals and alarm signals from external devices to the main control board. 2.1.2.3 GTMU The GSM Transmission, Timing, and Management Unit for BBU (GTMU) controls and manages the entire BTS. It provides interfaces related to the reference clock, power supply, OM, and external alarm collection. 2.1.2.4 UELP Board The Universal E1/T1 Lightning Protection (UELP) is a universal E1/T1 surge protection unit. The UELP is optionally installed in the SLPU or BBU. Each UELP provides surge protection for four E1s/T1s. 2.1.2.5 UBFA Module This describes the Universal BBU Fan Unit Type A (UBFA) module of the BBU3900. The UBFA controls the fan speed and detects the temperature of the fan board. 2.1.2.6 UPEU Board This describes the Universal Power and Environment Interface Unit (UPEU) board. It is a mandatory board of the BBU3900 that converts -48 V or +24 V DC to +12 V DC.
Board Configuration of the BBU3900 This describes the board configuration of the BBU3900. Table 2-1 describes the board configuration principles of the BBU3900. Table 2-1 Board configuration principles of the BBU3900
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Board/ Modul e
Optional/ Mandatory
Maximum Configurati on
Slot
Configuration Limitations
GTMU
Mandatory
1
Slot 5 and slot 6
Only configured at slot 5 and slot 6
UBFA
Mandatory
1
FAN
Only configured at the fan slot
UPEU
Mandatory
2
PWR1 and PWR2
Preferentially configured at PWR2 in the case of a single UPEU
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Board/ Modul e
Optional/ Mandatory
Maximum Configurati on
Slot
Configuration Limitations
UELP
Optional
2
Slot 0 and slot 4
In the case of less than or equal to four E1 signals, one UELP is required and installed in slot 4. In the case of more than four and less than or equal to eight E1 signals, two UELPs are required and installed in slot 0 and slot 4. In the case of more than eight E1 signals, the SLPU is required and the UELPs are installed in the SLPU.
UEIU
Optional
1
PWR1 and PWR2
Preferentially configured at PWR1
Figure 2-2 shows the typical configuration of the BBU3900. Figure 2-2 Typical configuration of the BBU3900
GTMU TX0
CPRI0
RX0
TX1
1
RX1 TX2
2
CPRI2
RX2
TX3
3
RX3TX4
4
CPRI4
RX4
TX5
5
RX5LIU0 LIU2 LIU1 LIU3
CPRI1
ETH
UBFA
TX
FE0
FE1
RX
CPRI3
CPRI5 RUN ALM AC T
USB TST
GTMU
E1/T1
RST
UPEU
UEIU Board This describes the Universal Environment Interface Unit (UEIU) board of the BBU3900. The UEIU transmits monitoring signals and alarm signals from external devices to the main control board.
Panel Figure 2-3 shows the panel of the UEIU.
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Figure 2-3 Panel of the UEIU
Function The UEIU has the following functions: l
Providing two ports with each transmitting one RS485 signal
l
Providing two ports with each transmitting four dry contact signals
Port Table 2-2 describes the ports on the UEIU panel. Table 2-2 Ports on the UEIU Label
Connector Type
Description
MON0
RJ45
One RS485 signal
MON1
RJ45
One RS485 signal
EXT-ALM0
RJ45
Four dry contact signals
EXT-ALM1
RJ45
Four dry contact signals
GTMU The GSM Transmission, Timing, and Management Unit for BBU (GTMU) controls and manages the entire BTS. It provides interfaces related to the reference clock, power supply, OM, and external alarm collection.
Panel Figure 2-4 shows the GTMU panel.
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Figure 2-4 Panel of the GTMU GTMU
CPRI0
TX0
RX0
TX1
1
RX1 TX2
2
CPRI2
RX2
TX3
3
RX3 TX4
4
CPRI4
RX4
TX5
5
RX5 LIU0 LIU2 LIU1 LIU3
CPRI1
ETH
TX
FE0
RX
CPRI3
FE1
CPRI5 RUN ALM ACT
E1/T1
USB TST
RST
Functions The GTMU performs the following functions: l
Controlling, maintaining, and operating the BTS
l
Providing fault management, configuration management, performance management, and security management
l
Monitoring the fan module and the power supply module
l
Distributing and managing BTS clock signals
l
Providing clock input for testing
l
Providing the Ethernet port for local maintenance
l
Providing four E1 inputs
l
Providing CPRI ports for the communication with the RF modules
LED Table 2-3 describes the LEDs on the GTMU panel. Table 2-3 LEDs on the GTMU LED
Color
State
Description
RUN
Green
ON
The board is faulty.
OFF
No power supply is available or the board is faulty.
1s ON and 1s OFF
The board is operational.
2s ON and 2s OFF
The OML link is abnormal.
0.125s ON and 0.125s OFF
The board is loading software.
ON
A fault occurs in the running board.
OFF
No alarm is generated.
ON
The board is operational.
ALM
ACT 2-6
Red
Green
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LED
LIU0-LIU3
CPRI0CPRI5
Color
State
Description
OFF
Board Fault
ON
Local E1/T1 alarms are reported.
0.125s ON and 0.125s OFF
A remote E1/T1 alarm is generated.
OFF
This link is not used or the alarm is cleared.
Green
ON
The CPRI link is normal.
Red
ON
The reception of the optical module is abnormal and an alarm is generated.
Green
Port Table 2-4 describes the ports on the GTMU panel. Table 2-4 Ports on the GTMU panel Label
Connector Type
Description
CPRI0-CPRI5
SFP connector
Ports for the communication between the BBU and the RF module; support input and output of the optical and electrical signal .
ETH
RJ45 connector
Performs local maintenance and commissioning
FE0
RJ45 connector
A reserved port that performs the following function: Connects the BBU to a routing device in the equipment room through the Ethernet cable to transmit network information.
FE1
DLC connector
A reserved port that performs the following function: Connects the BBU to a routing device in the equipment room through the optical cable to transmit network information.
USB
USB connector
A reserved port that performs the following function: Used in software upgrade from a USB disk
TST
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USB connector
Tests the output clock signals using a tester
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Label
Connector Type
Description
E1/T1
DB26 female connector
Provides the input and output of the four E1/T1 signals between the GTMU and the UELP or between the GTMU and the BSC.
The RESET button on the GTMU is used to reset the GTMU.
DIP Switch The GTMU has five DIP switches. Each DIP switch has four DIP bits. The DIP switches S1 and S2 should be set in pairs. l
If the 75-ohm E1 cable is used, the S1 and S2 should be set as follows: The E1 impedance is set to 75 ohms and the E1/T1 is grounded.
l
If the 120-ohm E1 cable is used, the S1 and S2 should be set as follows: The E1 impedance is set to 120 ohms and the E1/T1 is not grounded.
l
If the 100-ohm T1 cable is used, the S1 and S2 should be set as follows: The T1 impedance is set to 100 ohms and the E1/T1 is not grounded. NOTE
All the E1/T1 cables are used in balanced mode.
The functions of the DIP switches are as follows: l
S1 is used to set E1 impedance. Table 2-5 describes the settings of the DIP switch.
l
S2 is used to set the grounding of E1/T1 transmission. Table 2-6 describes the settings of the DIP switch.
l
S3 is reserved.
l
S4 is used for the selection of E1 bypass. Table 2-7 describes the settings of the DIP switch.
l
S5 is used to set the timeslots when the E1 link is bypassed. Table 2-8 describes the settings of the DIP switch.
Table 2-5 Settings of S1 DIP Switch
S1
DIP Status
Description
1
2
ON
ON
The E1 impedance is set to 75 ohms.
OFF
ON
The E1 impedance is set to 120 ohms.
ON
OFF
The T1 impedance is set to 100 ohms.
NOTE
The DIP bits 3 and 4 of S1 should retain the default settings. The default settings are OFF. If they are ON, you should change them to OFF.
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Table 2-6 Settings of S2 DIP Switch
DIP Status
Description
1
2
3
4
S2
ON
ON
ON
ON
E1/T1 grounded (unbalanced mode)
OFF
OFF
OFF
OFF
E1/T1 not grounded (balanced mode)
Other settings of the DIP bits
Disabled
NOTE
All the DIP bits of S2 are set to OFF (balanced mode) by default in 75-ohm E1 mode. When four E1 links are faulty, all the DIP bits of S2 should be set to ON (unbalanced mode) so that the faults are rectified. All the DIP bits of S2 should retain OFF in 120-ohm E1 mode or 100-ohm T1 mode.
Table 2-7 Settings of S4 DIP Switch
DIP Status
Description
1
2
3
4
S4
ON
ON
ON
ON
The E1 link can be bypassed.
OFF
OFF
OFF
OFF
The E1 link cannot be bypassed.
Other settings of the DIP bits
Disabled
Table 2-8 Settings of S5
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DIP Switch
DIP Status 1
2
3
4
S5
ON
ON
ON
ON
The E1 link cannot be bypassed.
OFF
ON
ON
OFF
The E1 link of the Level 1 cascaded BTS can be bypassed.
ON
OFF
ON
OFF
The E1 link of the Level 2 cascaded BTS can be bypassed.
Description
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DIP Switch
DIP Status
Description
1
2
3
4
OFF
OFF
ON
OFF
The E1 link of the Level 3 cascaded BTS can be bypassed.
ON
ON
OFF
OFF
The E1 link of the Level 4 cascaded BTS can be bypassed.
OFF
ON
OFF
OFF
The E1 link of the Level 5 cascaded BTS can be bypassed.
UELP Board The Universal E1/T1 Lightning Protection (UELP) is a universal E1/T1 surge protection unit. The UELP is optionally installed in the SLPU or BBU. Each UELP provides surge protection for four E1s/T1s.
Panel Figure 2-5 shows the panel of the UELP. Figure 2-5 Panel of the UELP
Port Table 2-9 describes the ports on the panel of the UELP. Table 2-9 Ports on the panel of the UELP Label
Connector Type
Description
INSIDE
DB25
E1 transfer transmission port
OUTSIDE
DB26
E1 transmission port
DIP Switch The UELP has one DIP switch, which is used to select whether the receive terminal is grounded. The DIP switch has four bits. Figure 2-6 shows the DIP switch on the UELP. 2-10
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Figure 2-6 DIP switch on the UELP
Table 2-10 describes the DIP switch on the UELP. Table 2-10 DIP switch on the UELP DIP Switch
DIP Status 1
2
3
4
S1
ON
ON
ON
ON
Used for the 75-ohm unbalanced mode
OFF
OFF
OFF
OFF
Used for other modes except the 75-ohm unbalanced mode
Description
UBFA Module This describes the Universal BBU Fan Unit Type A (UBFA) module of the BBU3900. The UBFA controls the fan speed and detects the temperature of the fan board.
Panel Figure 2-7 shows the panel of the UBFA.
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Figure 2-7 Panel of the UBFA
Function The UBFA has the following functions: l
Controlling the fan speed
l
Reporting the fan status to the main control board.
l
Detecting the temperature of the air inlets
LED The UBFA has only one LED, indicating the running status of the module. Table 2-11 describes the LED and its status. Table 2-11 LED on the UBFA Label
Color
Status
Description
STATE
Green
0.125s ON, 0.125s OFF
The module is not registered, and no alarm is reported.
1s ON, 1s OFF
The module is running properly.
OFF
No alarm is reported.
Red 2-12
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Label
Color
Status
Description
1s ON, 1s OFF
The module is reporting alarms.
UPEU Board This describes the Universal Power and Environment Interface Unit (UPEU) board. It is a mandatory board of the BBU3900 that converts -48 V or +24 V DC to +12 V DC.
Panel The UPEU is classified into the Universal Power and Environment Interface Unit Type A (UPEA) and the Universal Power and Environment Interface Unit Type B (UPEB). The UPEA converts -48 V DC to +12 V DC and the UPEB converts 24 V DC to 12 V DC. Figure 2-8 shows the UPEA panel and Figure 2-9 shows the UPEB panel. Figure 2-8 Panel of the UPEA
Figure 2-9 Panel of the UPEB
Functions The UPEU has the following functions: l
Converting -48 V or +24 V DC to +12 V DC that is applicable to the boards
l
Providing two ports with each transmitting one RS485 signal and another two ports with each transmitting four dry contact signals
l
Providing reverse connection protection for power cable connectors.
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LED The UPEU has only one LED, indicating the running status of the board. Table 2-12 describes the LED and its status. Table 2-12 LED on the UPEU Label
Color
Status
Meaning
RUN
Green
ON
The UPEU is operational.
OFF
Power input is unavailable or the board is faulty.
Port Table 2-13 describes the ports on the UPEU. Table 2-13 Ports on the UPEU Label
Connector Type
Description
PWR
3V3
+24 V/-48 V DC power input
EXT-ALM1
RJ45
Transmitting four dry contact alarms
EXT-ALM0
RJ45
Transmitting four dry contact alarms
MON1
RJ45
Transmitting one RS485 environment monitoring signal
MON0
RJ45
Transmitting one RS485 environment monitoring signal
2.2 BBU3900 Cables The BBU3900 cables are classified into the PGND cable, power cable, E1 cable, E1 surge protection transfer cable, monitoring signal cable between the APMI and the BBU, CPRI optical cable, and BBU alarm cable. 2.2.1 BBU3900 Cable List The BBU3900 cables consist of BBU power cable, BBU PGND cable, E1 cable, E1 surge protection transfer cable, monitoring signal cable between the APMI and the BBU, CPRI optical cable, and BBU alarm cable. 2.2.2 PGND Cable 2-14
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This describes the PGND cable. The PGND cable ensures the grounding of the BBU. 2.2.3 Power Cable This describes the power cable. Either -48 V power cable or +24 V power cable can be used, depending on the power input. 2.2.4 E1 Cable This describes the E1 cable. It connects the BBU3900 to the RNC and transmits baseband signals. 2.2.5 E1 Surge Protection Transfer Cable This describes the E1 surge protection transfer cable. It connects the UELP to the main control board. 2.2.6 Monitoring Signal Cable Between the APMI and the BBU This describes the monitoring signal cable between the APMI and the BBU. It transmits the environment monitoring signals of the power cabinet to the BBU. 2.2.7 CPRI Optical Cable This describes the CPRI optical cable. It connects the BBU to the RRU and transmits CPRI signals between them. 2.2.8 Alarm Cable This describes the alarm cable. It transmits alarm signals from external devices to the BBU.
2.2.1 BBU3900 Cable List The BBU3900 cables consist of BBU power cable, BBU PGND cable, E1 cable, E1 surge protection transfer cable, monitoring signal cable between the APMI and the BBU, CPRI optical cable, and BBU alarm cable. Table 2-14 lists the BBU3900 cables. Table 2-14 Cable list Cable Type
Factory Settings
Installation Positions
BBU PGND cable
Both ends of the cable should be connected on site.
One end is connected to the grounding bolt of the BBU. The other end is connected to the wiring terminal of the PGND bar.
BBU power cable
Both ends of the cable should be connected on site.
One end is connected to the PWR port on the UPEU. The other end is connected to the external power device (5 A).
E1 cable
Both ends of the cable should be connected on site.
One end is connected to the OUTSIDE port on the UELP or the E1/T1 port on the GTMU. The other end is connected to the corresponding auxiliary equipment.
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Cable Type
Factory Settings
Installation Positions
E1 surge protection transfer cable
Both ends of the cable should be connected on site.
One end is connected to the INSIDE port on the UELP. The other end is connected to the E1/T1 port on the GTMU.
Monitoring signal cable between the APMI and the BBU
CPRI optical cable
Before delivery, the cable is routed and one end is connected to the APMI. The other end needs to be installed on site.
One end is connected to the MON port on the UEIU or the UPEU.
Both ends of the cable should be connected on site.
One end is connected to the CPRI port on the BBU.
The other end is connected to the corresponding external device.
The other end is connected to the CPRI port on the RRU. BBU alarm cable
Both ends of the cable should be connected on site.
One end is connected to the EXT-ALM port on the UEIU or the UPEU. The other end is connected to the corresponding external device.
2.2.2 PGND Cable This describes the PGND cable. The PGND cable ensures the grounding of the BBU.
Appearance The green and yellow PGND cable is a single cable with a cross-sectional area of 6 mm2. Both ends of the cable are OT terminals. If you prepare the cable by yourself, it is recommended that you use a copper-based cable with a minimum cross-sectional area of 6 mm2. Figure 2-10 shows the PGND cable. Figure 2-10 PGND cable
2.2.3 Power Cable This describes the power cable. Either -48 V power cable or +24 V power cable can be used, depending on the power input. 2-16
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Appearance The power cable has a 3V3 connector at one end and bare wires at the other end. Based on the connector of the power distribution device, appropriate terminals are added to the bare end on site. Figure 2-11 shows the power cable by taking OT terminals at the bare end as an example. Figure 2-11 Power cable
(1) 3V3 connector
(2) OT terminal
NOTE
There are two –48 V power cables with one in blue and the other in black. The +24 V power cables have the same appearance to the –48 V power cables, but they differ in color. The +24 V power cable are in red and black.
Pin Assignment The power cable is a 2-wire cable. Table 2-15 and Table 2-16 describe the pin assignment for the wires of the power cable. Table 2-15 Pin assignment for wires of the -48 V power cable Pin on the 3V3 Connector
Color
Description
A1
Blue
-48 V
A2
-
-
A3
Black
GND
Table 2-16 Pin assignment for wires of the +24 V power cable Pin on the 3V3 Connector
Color
Description
A1
Red
+24 V
A2
-
-
A3
Black
GND
2.2.4 E1 Cable This describes the E1 cable. It connects the BBU3900 to the RNC and transmits baseband signals. Issue 04 (2008-09-05)
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Structure The E1 cables are of two types: 75-ohm E1 coaxial cable and 120-ohm E1 twisted pair cable. One end of the E1 cable is a DB26 male connector. The connector at the other end of the cable should be made on site according to site requirements. Figure 2-12 shows an E1 cable. Figure 2-12 E1 cable
Pin Assignment Table 2-17 and Table 2-18 describe the pin assignment for the wires of the E1 cable. NOTE
In Table 2-17, "Tip" refers to a wire in the E1 coaxial cable, and "Ring" refers to an external conductor of the cable.
Table 2-17 Pin assignment for the wires of the 75-ohm E1 coaxial cable
2-18
Pins of the DB26 Male Connector
Wire Type
Coaxial Series No.
Cable Label
X1.1
Tip
1
RX1+
X1.2
Ring
X1.3
Tip
X1.4
Ring
X1.5
Tip
X1.6
Ring
X1.7
Tip
X1.8
Ring
X1.19
Tip
X1.20
Ring
X1.21
Tip
X1.22
Ring
X1.23
Tip
X1.24
Ring
RX13
RX2+ RX2-
5
RX3+ RX3-
7
RX4+ RX4-
2
TX1+ TX1-
4
TX2+ TX2-
6
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Pins of the DB26 Male Connector
Wire Type
Coaxial Series No.
Cable Label
X1.25
Tip
8
TX4+
X1.26
Ring
TX4-
Table 2-18 Pin assignment for the wires of the 120-ohm E1 twisted pair cable Pins of the DB26 Male Connector
Wire Color
Wire Type
Cable Labels
X.1
Blue
Twisted pair cable
RX1+
X.2
White
X.3
Orange
X.4
White
X.5
Green
X.6
White
X.7
Brown
X.8
White
X.19
Gray
X.20
White
X.21
Blue
X.22
Red
X.23
Orange
X.24
Red
X.25
Green
X.26
Red
RX1Twisted pair cable
RX2+ RX2-
Twisted pair cable
RX3+ RX3-
Twisted pair cable
RX4+ RX4-
Twisted pair cable
TX1+ TX1-
Twisted pair cable
TX2+ TX2-
Twisted pair cable
TX3+ TX3-
Twisted pair cable
TX4+ TX4-
2.2.5 E1 Surge Protection Transfer Cable This describes the E1 surge protection transfer cable. It connects the UELP to the main control board.
Appearance The E1 surge protection transfer cable has a DB26 male connector at one end and a DB25 male connector at the other end, as shown in Figure 2-13. Issue 04 (2008-09-05)
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Figure 2-13 E1 surge protection transfer cable
(1) DB25 male
(2) DB26 male
Pin Assignment Table 2-19 describes the pin assignment for the wires of the E1 surge protection transfer cable. Table 2-19 Pin assignment for the wires of the E1 surge protection transfer cable Pin on the DB26 Male Connector
Wire Type
Pin on the DB25 Male Connector
X1.20
Twisted pair
X2.2
X1.19 X1.4
X2.3 Twisted pair
X1.3 X1.22
X2.5 Twisted pair
X1.21 X1.6
Twisted pair
Twisted pair
Twisted pair
Twisted pair
X2.14 X2.15
Twisted pair
X1.26
2-20
X2.12 X2.13
X1.2 X1.25
X2.10 X2.11
X1.7 X1.1
X2.8 X2.9
X1.23 X1.8
X2.6 X2.7
X1.5 X1.24
X2.4
X2.24 X2.25
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2.2.6 Monitoring Signal Cable Between the APMI and the BBU This describes the monitoring signal cable between the APMI and the BBU. It transmits the environment monitoring signals of the power cabinet to the BBU.
Appearance The monitoring signal cable between the APMI and the BBU has an RJ45 connector at one end and four bare wires at the other end. Figure 2-14 shows the monitoring signal cable between the APMI and the BBU. Figure 2-14 Monitoring signal cable between the APMI and the BBU
(1) RJ45 connector
Pin Assignment Table 2-20 describes the pin assignment for the wires of the monitoring signal cable between the APMI and the BBU. Table 2-20 Pin assignment for the wires of the monitoring signal cable between the APMI and the BBU Pin on the RJ45 Connector
Color
X2 to X5 Ends
Description
Terminal on the APMI
X1.1
White
X2
Twisted pair
TX+
X1.2
Orange
X3
X1.4
Blue
X4
X1.5
White
X5
TXTwisted pair
RX+ RX-
2.2.7 CPRI Optical Cable This describes the CPRI optical cable. It connects the BBU to the RRU and transmits CPRI signals between them.
Appearance The CPRI optical cable is a multi-mode 2-wire cable with DLC connectors at both ends. Figure 2-15 shows the CPRI optical cable. Issue 04 (2008-09-05)
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Figure 2-15 CPRI optical cable
(1) DLC connector
(2) Label on the fiber tail
(3) Fiber tail
Pin Assignment Table 2-21 describes the pin assignment for the fiber tails of the CPRI optical cable. Table 2-21 Pin assignment for the fiber tails of the CPRI optical cable Label
Color
Connect to...
1A
Orange
RX port on the RRU
1B
Gray
TX port on the RRU
2A
Orange
TX port on the BBU
2B
Gray
RX port on the BBU
2.2.8 Alarm Cable This describes the alarm cable. It transmits alarm signals from external devices to the BBU.
Appearance The alarm cable of the BBU has an RJ45 connector at each end, as shown in Figure 2-16. One RJ45 connector at one end, however, may be removed and an appropriate terminal may be added according to the field requirements. Figure 2-16 Alarm cable
(1) RJ45 connector
Pin Assignment Table 2-22 describes the pin assignment for the wires of the alarm cable. 2-22
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Table 2-22 Pin assignment for the wires of the alarm cable Pin on the RJ45 Connector
Pin on the RJ45 Connector
Wire Color
Wire Type
X1.1
X2.1
White and orange
Twisted pair
X1.2
X2.2
Orange
X1.3
X2.3
White and green
X1.6
X2.6
Green
X1.5
X2.5
White and blue
X1.4
X2.4
Blue
X1.7
X2.7
White and brown
X1.8
X2.8
Brown
Twisted pair
Twisted pair
Twisted pair
2.3 BBU3900 Auxiliary Equipment The BBU3900 auxiliary equipment consists of the APM30 and the DCDU-03B. You can choose one or more types of auxiliary equipment when installing the BBU3900. 2.3.1 APM30 The advanced power module 30 (APM30) is an integrated backup power system, which can be installed outdoors. The APM30 consists of the power cabinet, battery cabinet, and transmission cabinet. The power cabinet provides the DBS with power distribution, surge protection, and backup power for a short period. It also provides space for installing the transmission equipment. The battery cabinet supplies backup power to the DBS for a long period. The transmission cabinet provides 11 U space for installing the transmission equipment. 2.3.2 DCDU-03B As an auxiliary device of the distributed BTS, the DCDU-03B provides the DC power solution to meet the requirement of rapid network deployment.
2.3.1 APM30 The advanced power module 30 (APM30) is an integrated backup power system, which can be installed outdoors. The APM30 consists of the power cabinet, battery cabinet, and transmission cabinet. The power cabinet provides the DBS with power distribution, surge protection, and backup power for a short period. It also provides space for installing the transmission equipment. The battery cabinet supplies backup power to the DBS for a long period. The transmission cabinet provides 11 U space for installing the transmission equipment.
Power Cabinet The power cabinet provides the DBS and mini BTSs with –48 V DC power and backup power for a short period, and provides space for installing the transmission equipment. It also performs functions such as battery management and monitoring, and surge protection. Issue 04 (2008-09-05)
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Maximum DC power output: –48 V/90 A
l
Backup power for a short period: batteries of –48 V (24 Ah)
l
Space for user equipment: 5 U
Battery Cabinet The battery cabinet is optional. It supplies backup power to the equipment for a long time in certain situations. The battery cabinet supports -48 V (50 Ah) or -48 V (92 Ah) built-in battery groups. A maximum volume of -48 V (184 Ah) can be realized through parallel connection.
Transmission Cabinet The transmission cabinet, which is optional, provides 11 U space for installing the user equipment. If a heater is installed in the 1 U space at the transmission cabinet, the transmission cabinet provides 10 U space for installing the user equipment. For detailed structure and functions of the APM30, refer to the APM 30 User Guide.
2.3.2 DCDU-03B As an auxiliary device of the distributed BTS, the DCDU-03B provides the DC power solution to meet the requirement of rapid network deployment.
Appearance Figure 2-17 shows the DCDU-03B. Figure 2-17 DCDU-03B
Ports Figure 2-18 shows the ports on the DCDU-03B panel.
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SW0
SW1
SW2
SW3
SW4
SW5
SW6
SW7
SW8
ON
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
NEG(-) INPUT RTN(+)
PGND RTN(+)NEG(-)
Figure 2-18 Ports on the DCDU-03B panel
LOAD0 LOAD1 LOAD2 LOAD3 LOAD4 LOAD5 LOAD6 LOAD7 LOAD8 ALM
Table 2-23 describes the ports on the DCDU-03B panel. Table 2-23 Parameters for the ports on the DCDU-03B panel Parameter
Specification
Standar d CrossSectiona l Area (mm2)
Remarks
DC input terminal
Supports M6 2-hole OT terminal.
16
Supports input power cables ranging from 6 mm2 to 25 mm2.
DC output terminal
LOADO-LOAD8 (from left to right) LOAD0-LOAD5 provide 20 A DC output and LOAD6-LOAD8 provide 12 A DC output.
2.5
l
Three rows of wiring terminals for output: NEG(-), RTN(+), and PGND, where, the last three wiring terminals of the PGND support the grounding of M4 2hole OT terminal.
l
Supports a maximum of 6 mm2 output power cable.
Supports 2-PIN cord end terminal.
-
Surge protection alarm wiring terminal
2-PIN cord end terminal regardless of polarity.
Function The DCDU-03B is applied for indoor DC power distribution. It can be installed in the 19-inch space or on the wall. All the cables are routed from the front panel. The primary functions are as follows: Issue 04 (2008-09-05)
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2-26
l
Supporting the –48 V DC power input (voltage ranging from –38.4 V DC to –57 V DC)
l
Providing nine -48 V DC power outputs for boards and modules in the cabinet
l
Providing surge protection of 10 kA in differential mode and 15 kA in common mode, and providing dry contact for surge protection failure
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Maintaining BBU3900 Hardware
About This Chapter After the site is put into use, routine maintenance on the BBU is required to ensure that it runs properly in the long term. 3.1 Maintenance Items of the BBU The maintenance items consist of the checking of fans, equipment surface, equipment cleanness, and LEDs. 3.2 Powering On and Powering Off the BBU This describes how to power on and power off the BBU. When powering on the BBU, you should check the status of the LEDs on the BBU. When powering off the BBU, you can perform normal power-off or emergency power-off operation based on the actual situations. 3.3 Replacing the BBU Parts This describes how to replace the faulty UBFU, UPEU, UEIU, GTMU, UELP, and optical module.
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3.1 Maintenance Items of the BBU The maintenance items consist of the checking of fans, equipment surface, equipment cleanness, and LEDs.
Maintenance Items of the Equipment Table 3-1 lists the maintenance items associated with the BBU. Table 3-1 Maintenance items associated with the BBU Item
Interval
Operation Instructions
Reference Standard
Checking the fans
Weekly, monthly, or quarterly
Check the fans.
Alarms related to the fans are not present.
Checking the equipment surface
Monthly or quarterly
Check whether there are dents, cracks, holes, or corrosion on the surface of the equipment and whether the cabinet label is legible.
None.
Checking the equipment cleanness
Monthly or quarterly
Check whether the equipment is clean.
The surface of the equipment is clean and no dust is accumulated inside the cabinet.
Checking the LEDs
Monthly or quarterly
Check whether the equipment operates normally by observing the LEDs on the equipment.
For details about the status of the LEDs, refer to 2.1.2 Boards and Module of the BBU3900.
3.2 Powering On and Powering Off the BBU This describes how to power on and power off the BBU. When powering on the BBU, you should check the status of the LEDs on the BBU. When powering off the BBU, you can perform normal power-off or emergency power-off operation based on the actual situations. 3.2.1 Powering On the BBU Before powering on the BBU, set the power switch on the BBU to ON and determine the operation status of the BBU based on the status of the LEDs. 3.2.2 Powering Off the BBU The BBU power-off is classified into normal power-off and emergency power-off.
3.2.1 Powering On the BBU Before powering on the BBU, set the power switch on the BBU to ON and determine the operation status of the BBU based on the status of the LEDs. 3-2
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Prerequisite l
The hardware and cables of the BBU are installed.
l
The voltage of the external input power ranges from –38.4 V DC to –57 V DC.
Procedure Step 1 Power on the BBU by setting its power switch to ON. Step 2 Check the status of the three LEDs on the BBU panel, namely RUN, ALM, and ACT, and then proceed with the subsequent operations based on the status of the LEDs. If...
Then...
l
The RUN LED is on,
l
The ALM LED is on for 1s.
l
The ACT LED is on for 1s.
l
The RUN LED is on,
l
The ALM LED is on,
l
The ACT LED is on,
The board operates normally. Go to Step 3.
The board does not work properly. Rectify the faults in the following manner: l
Verify that the power cable is securely connected.
l
Reset the board.
l
Remove the board and check whether there are damaged pins. If there are damaged pins, replace the board. If there are no damaged pins, reinstall the board.
Check the LEDs. If the states of the LEDs are normal, go to Step 3. If the states of the LEDs are not normal, contact Huawei Technical Support.
Step 3 View the status of the other LEDs on the BBU panel. Step 4 Take corresponding actions based on the LED status. If...
Then...
The BBU runs normally,
The power-on operation is complete.
The BBU is faulty,
Rectify the fault, and then go to Step 1.
----End
3.2.2 Powering Off the BBU The BBU power-off is classified into normal power-off and emergency power-off.
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Procedure Step 1 Choose normal power-off or emergency power-off based on the actual situation. If...
Then...
The BBU is powered off in the case of an equipment swap or a foreseeable regional blackout,
Go to Step 2 to perform the normal poweroff.
The BBU incurs electric spark, smog, water immersion, and so on,
Go to Step 3 to perform the emergency power-off.
Step 2 To perform the normal power-off, do as follows: 1.
Set the power switch of the BBU to OFF.
2.
Set the MCB on the PDU that corresponds to the BBU to OFF.
3.
Set the MCB on the external power device that corresponds to the BBU to OFF.
Step 3 Set the MCB on the external power device that corresponds to the BBU to OFF. If time allows, set the power switch of the BBU to OFF , and then set the MCB on the PDU that corresponds to the BBU to OFF. ----End
3.3 Replacing the BBU Parts This describes how to replace the faulty UBFU, UPEU, UEIU, GTMU, UELP, and optical module. 3.3.1 Replacing the UBFU The UBFU is the fan module in the BBU. It works with the air inlet box in the cabinet to form a ventilation path. During the replacement of the UBFU, the heat generated by the BBU might not be properly ventilated and, with the increase of the temperature, an overtemperature alarm might be triggered. The services, however, are not affected. 3.3.2 Replacing a UPEU The UPEU is the power module of the BBU and provides power for the boards in the BBU. The UPEU supports the –48 V DC input. During the replacement of the UPEU, the BBU is powered off and the ongoing-services are disrupted. 3.3.3 Replacing the UEIU The Universal Environment Interface Unit (UEIU) is used to transmit the monitoring signals of the service boards in the BBU. During the replacement of the UEIU, the external devices cannot be monitored. 3.3.4 Replacing the GTMU As the basic transmission and control entity of the BBU, the GTMU controls and manages the entire BTS. It provides the interfaces associated with reference clock, power supply, OM, and external alarm collection. During the replacement of the GTMU, the services carried by the BTS are disrupted. 3.3.5 Replacing the UELP 3-4
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The UELP is used for E1/T1 surge protection of the BBU. Each UELP provides surge protection for four E1/T1 signals. The UELP replacement interrupts the E1/T1 links. Thus, the ongoing BTS services are disrupted. 3.3.6 Replacing the Optical Module The optical module provides the electrical-optical interface for the optical transmission between the BBU and other devices. During the replacement of the optical module, the optical cable is removed. Thus, the CPRI signal transmission is disrupted.
3.3.1 Replacing the UBFU The UBFU is the fan module in the BBU. It works with the air inlet box in the cabinet to form a ventilation path. During the replacement of the UBFU, the heat generated by the BBU might not be properly ventilated and, with the increase of the temperature, an overtemperature alarm might be triggered. The services, however, are not affected.
Prerequisite l
The number and types of faulty UBFUs are determined, and new UBFUs are available.
l
The installation positions of the faulty UBFUs are recorded.
Context It takes about three minutes to replace a UBFU. The duration of the replacement involves the removal of the faulty UBFU, the installation of the new UBFU, and the time required for the operation of the UBFU.
Procedure Step 1 Loosen the screws on the panel of the UBFU, as shown in Figure 3-1. Figure 3-1 Loosening the screws
Step 2 Remove the faulty UBFU from the slot. Issue 04 (2008-09-05)
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Step 3 Slide the new UBFU into the slot of the faulty UBFU. Step 4 Fasten the screws on the panel of the new UBFU. Step 5 Check the STATE LED on the panel of the module and take actions accordingly. If...
Then...
The green STATE LED blinks slowly (on for 1 second and off for 1 second).
On the Board Management window of the Site Maintenance Terminal System, check whether the UBFU runs normally, as shown in Figure 3-2.
The green STATE LED does not blink slowly (on for 1 second and off for 1 second).
Power off the BBU, and then remove the board. Check whether there is a damaged pin. If there is no damaged pin, reinstall the board, and then check whether the board runs normally. If there is a damaged pin, replace the board.
Figure 3-2 Checking whether the UBFU runs normally
If...
Then...
The UBFU icon is displayed white,
The board runs properly. Then, go to the next step.
The UBFU icon is displayed in other color,
The board runs improperly. Reinstall the board.
Step 6 On the Board Management window of the Site Maintenance Terminal System, right-click the board to be queried, and choose Board Warning from the shortcut menu, as shown in Figure 3-3. 3-6
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Figure 3-3 Querying UBFU alarms
If...
Then...
Alarms are not present,
The replacement is successful.
Alarms are present,
Rectify the fault as recommended.
NOTE
The alarms associated with the fans are the overtemperature alarm, undertemperature alarm, block alarm, and communication alarm.
----End
Postrequisite Contact the local Huawei office to handle the faulty UBFU.
3.3.2 Replacing a UPEU The UPEU is the power module of the BBU and provides power for the boards in the BBU. The UPEU supports the –48 V DC input. During the replacement of the UPEU, the BBU is powered off and the ongoing-services are disrupted.
Prerequisite l
The number and types of faulty UPEUs are obtained, and new UPEUs are available.
l
The installation positions of the faulty UPEUs and the interconnection relations of the cables on the UPEU panels are recorded.
l
The required tools and materials such as an ESD wrist strap/ESD gloves and an ESD box/ ESD bag are kept ready.
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Context It takes about 10 minutes to replace the board. The duration of the replacement involves the removal of the cables and the faulty UPEU, the installation of the new UPEU and the cables, and the time elapsed for the operation of the UPEU.
CAUTION Take correct ESD prevention measures, such as wearing an ESD wrist strap or ESD gloves, to avoid static damage to boards, modules, and electronic components.
Procedure Step 1 Power off the BBU by referring to 3.2.2 Powering Off the BBU. Step 2 Remove the cables from the panel of the faulty UPEU. Step 3 Loosen the screws on the panel of the UPEU, as shown in Figure 3-4. Figure 3-4 Loosening the screws UPEU EXT-ALM1 EXT-ALM0 MON1
MON0
PWR
RUN
Step 4 Remove the faulty UPEU from the slot. Step 5 Put the faulty UPEU into the ESD bag. Step 6 Slide the new UPEU into the slot of the faulty UPEU. Step 7 Fasten the screws on the panel of the new UPEU. Step 8 Install the cables on the panel of the new board according to the recorded installation positions. Step 9 Power on the BBU by referring to 3.2.1 Powering On the BBU. Step 10 Check the RUN LED on the panel of the new UPEU and take action accordingly.
3-8
If...
Then...
The RUN LED is on
On the Board Management window of the Site Maintenance Terminal System, check whether the UPEU runs normally, as shown in Figure 3-5.
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If...
Then...
The RUN LED is off
Take the following measures to rectify the fault: l
Verify that the power switch is set to ON.
l
Power off the BBU and check whether the power cable is securely connected.
l
Power OFFthe BBU, and then remove the board. Check whether there are damaged pins. If there are no damaged pins, reinstall the board. If there is a damaged pin, replace the board.
Power on the BBU and check whether the LEDs blink normally.
Figure 3-5 Checking whether the UPEU runs properly
If...
Then...
The UPEU icon is displayed white
The board runs properly. Go to the next step.
The UPEU icon is displayed in other color,
The board runs improperly. Reinstall the board.
Step 11 On the Board Management window of the Site Maintenance Terminal System, right-click the board to be queried, and choose Board Warning from the shortcut menu, as shown in Figure 3-6.
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Figure 3-6 Querying the alarm information of the UPEU
If...
Then...
Alarms are not present
The replacement is successful.
Alarms are present
Rectify the fault as recommended.
----End
Postrequisite Contact the local Huawei office to handle the faulty UPEU.
3.3.3 Replacing the UEIU The Universal Environment Interface Unit (UEIU) is used to transmit the monitoring signals of the service boards in the BBU. During the replacement of the UEIU, the external devices cannot be monitored.
Prerequisite l
The number and types of faulty UEIUs are determined, and new UEIUs are available.
l
The installation positions of the faulty UEIUs and the interconnection relations of the cables on the UEIU panels are recorded.
l
The required tools and materials such as ESD wrist strap/ESD gloves and ESD box/ESD bag are kept ready.
Context This board is hot swappable. 3-10
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It takes about 5 minutes to replace the board. The duration of the replacement involves the removal of the cables and the faulty UEIU, the installation of the new UEIU and the cables, and the time elapsed for the operation of the UEIU.
CAUTION Take correct ESD prevention measures, such as wearing an ESD wrist strap or ESD gloves, to avoid static damage to boards, modules, and electronic components.
Procedure Step 1 Remove the cables from the panel of the faulty UEIU. Step 2 Loosen the screws on the panel of the UEIU, as shown in Figure 3-7. Figure 3-7 Loosening the screws
UEIU
EXT-ALM1 EXT-ALMO
MON1
MONO
Step 3 Remove the faulty UEIU from the slot. Step 4 Put the faulty UEIU into an ESD bag. Step 5 Slide the new UEIU into the slot of the faulty UEIU. Step 6 Fasten the screws on the panel of the new board. Step 7 Install the cables on the panel of the new board according to the recorded installation positions. ----End
Postrequisite Contact the local Huawei office to handle the faulty UEIU.
3.3.4 Replacing the GTMU As the basic transmission and control entity of the BBU, the GTMU controls and manages the entire BTS. It provides the interfaces associated with reference clock, power supply, OM, and external alarm collection. During the replacement of the GTMU, the services carried by the BTS are disrupted. Issue 04 (2008-09-05)
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Prerequisite l
The number and types of faulty GTMUs are determined, and new GTMUs are available.
l
The installation positions of the faulty GTMUs and the interconnection relations for the cables on the GTMU panels are recorded.
l
The required tools and materials such as ESD wrist strap/ESD gloves and ESD box/ESD bag are available.
Context This board is hot swappable. It takes about 15 minutes to replace the board. The duration of the replacement involves the removal of the cables and the faulty board, the installation of the new board and the cables, and the time required for the operation of the board.
CAUTION Take correct ESD prevention measures, such as wearing an ESD wrist strap or ESD gloves, to avoid static damage to boards, modules, and electronic components.
Procedure Step 1 Remove the cables from the panel of the faulty GTMU. Step 2 Loosen the screws on the panel of the GTMU, as shown in Figure 3-8. Figure 3-8 Loosening the screws GTMU
CPRI0
TX0
RX0
TX1
1
RX1 TX2
CPRI2
2
RX2
TX3
3
RX3 TX4
4
CPRI4
RX4
TX5
5
RX5 LIU0 LIU2 LIU1 LIU3
CPRI1
ETH
TX
FE0
RX
FE1
CPRI3
CPRI5 RUN ALM ACT
USB TST
E1/T1
RST
Step 3 Remove the faulty GTMU from the slot. Step 4 Put the faulty GTMU into an ESD bag. Step 5 Slide the new GTMU into the slot of the faulty GTMU. Step 6 Fasten the screws on the panel of the new GTMU. Step 7 Install the cables on the panel of the new GTMU according to the recorded installation positions. Step 8 Check the LEDs on the panel of the new board. 3-12
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If...
Then...
The RUN LED is on, and the ALM and On the Board Management window of the Site ACT LEDs are off, Maintenance Terminal System, check whether the GTMU runs normally, as shown in Figure 3-9. The RUN, ALM, or ACT LED is in other state,
Power off the BBU, and then remove the GTMU. Check whether there is a damaged pin. If there is no damaged pin, reinstall the board, and then check whether the board runs normally. If there is a damaged pin, replace the board.
Figure 3-9 Checking whether the GTMU runs properly
If...
Then...
The GTMU icon is displayed green,
The board runs properly. Then, go to the next step.
The GTMU icon is displayed in other color,
The board runs improperly. Reinstall the board.
Step 9 On the Board Management window of the Site Maintenance Terminal System, right-click the GTMU to be queried, and choose Board Information from the shortcut menu. Check whether the software version of the GTMU matches the software version of the BTS, as shown in Figure 3-10.
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Figure 3-10 Querying the software version of the GTMU
If...
Then...
The software version of the GTMU matches the current BTS software version,
Go to the next step.
The software version of the GTMU does not match the current BTS software version,
Load and activate the software.
Step 10 On the Board Management window of the Site Maintenance Terminal System, right-click the board to be queried, and choose Board Warning from the shortcut menu, as shown in Figure 3-11.
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Figure 3-11 Querying GTMU alarms
If...
Then...
Alarms are not present,
The replacement is successful.
Alarms are present,
Rectify the fault as recommended.
Step 11 Check whether the board can process the services. Perform dialing tests after the board replacement. If the board before the replacement supports PS services, check whether the board after the replacement can process the PS services, such as web browsing, to ensure that the board can provide services properly. ----End
Postrequisite Contact the local Huawei office to handle the faulty GTMU.
3.3.5 Replacing the UELP The UELP is used for E1/T1 surge protection of the BBU. Each UELP provides surge protection for four E1/T1 signals. The UELP replacement interrupts the E1/T1 links. Thus, the ongoing BTS services are disrupted.
Prerequisite l
The number and types of faulty UELPs are determined, and new UELPs are kept ready.
l
The installation positions of the UELP and the interconnection relations of the cables on the UELP panel are recorded.
l
The required tools and materials such as ESD wrist strap/ESD gloves and ESD box/ESD bag are kept ready.
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Context It takes about two minutes to replace the board. The duration of the replacement involves the removal of the cables and the faulty board, the installation of the new board and the cables, and the time required for the operation of the board.
CAUTION Take correct ESD prevention measures, such as wearing an ESD wrist strap or ESD gloves, to avoid static damage to boards, modules, and electronic components.
Procedure Step 1 Remove the cables from the panel of the faulty UELP. Step 2 Loosen the screws on the panel of the UELP, as shown in Figure 3-12. Figure 3-12 Loosening the screws UELP INSIDE
OUTSIDE
Step 3 Remove the faulty UELP from the slot. Step 4 Slide the new UELP into the slot of the faulty UELP. Step 5 Fasten the screws on the panel of the new UELP. Step 6 Install the cables on the panel of the new UELP according to the recorded installation positions. Step 7 Perform the dialing test to verify that the services are resumed. ----End
Postrequisite Contact the local Huawei office to handle the faulty UELP.
3.3.6 Replacing the Optical Module The optical module provides the electrical-optical interface for the optical transmission between the BBU and other devices. During the replacement of the optical module, the optical cable is removed. Thus, the CPRI signal transmission is disrupted.
Prerequisite
3-16
l
The number and types of faulty optical modules are determined, and new optical modules are available.
l
The installation positions of the faulty optical modules and optical cables are recorded. The interconnection relations for the optical cables are also recorded. Huawei Proprietary and Confidential Copyright © Huawei Technologies Co., Ltd
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3 Maintaining BBU3900 Hardware l
The required tools and materials such as ESD wrist strap/ESD gloves and ESD box/ESD bag are kept ready.
Context The optical module can be installed in the CPRI0-CPRI5 ports on the GTMU. The optical module is hot swappable. It takes about five minutes to replace the optical module of the BBU. The duration of the replacement involves the removal of the optical cable and the faulty optical module, the installation of the new optical module, the connection of the optical cable to the optical module, and the time elapsed for the restoration of the CPRI links.
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You must take proper ESD prevention measures, for example, wear an ESD wrist strap or a pair of ESD gloves to prevent the boards, modules, or electrical components from being damaged by static electricity generated by your body.
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Do not look into the optical module after removing the optical cable from the optical module.
Procedure Step 1 Press the bulge on the optical cable connector, and then remove the connector from the faulty optical module. Step 2 Turn the puller on the faulty optical module outwards, and then pull out the optical module from the slot and so from the BBU. Step 3 Install the new optical module into the BBU. Step 4 Remove the dustproof caps from the optical connector and from the optical module, and then insert the connector into the new module. Step 5 On the Board Management window of the Site Maintenance Terminal System, double-click the GTMU. On the displayed Topology Management window, check whether the transmission of CPRI signals is resumed by viewing the status of the RRU to which the replaced optical cable is connected, as shown in Figure 3-13.
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3 Maintaining BBU3900 Hardware
Figure 3-13 Checking whether the CPRI signal transmission is resumed
If...
Then...
The RRU module icon is displayed green,
The CPRI signal transmission is resumed. The replacement of the optical cable is successful.
The RRU module icon is not displayed green,
The CPRI signal transmission is abnormal. Check whether the connection of the optical cable is secured.
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Postrequisite Contact the local Huawei office to handle the faulty optical module.
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