Datasheet BTS3900 GSM huawei

BTS3900 GSM
V300R008
Hardware Description
Issue 03
Date 2008-07-15
Part Number
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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Contents
About This Document 1
1 System Architecture of the BTS3900 1-1
2 BTS3900 Cabinet 2-1
2.1 Appearance of the BTS3900 Cabinet 2-2
2.2 Structure of the BTS3900 Cabinet 2-2
2.2.1 Structure of the BTS3900 -48 V Cabinet 2-3
2.2.2 Structure of the BTS3900 +24 V Cabinet 2-5
2.2.3 Structure of the BTS3900 220 V Cabinet 2-7
3 Cable Connections of the BTS3900 3-1
3.1 Power Cable Connections of the BTS3900 3-2
3.1.1 Power Cable Connections of the BTS3900 -48 V Cabinet 3-2
3.1.2 Power Cable Connections of the BTS3900 +24 V Cabinet 3-5
3.1.3 Power Cable Connections of the BTS3900 220 V Cabinet 3-8
3.2 Signal Cable Connections of the BTS3900 3-12
3.2.1 Signal Cable Connections of a Single BTS3900 Cabinet 3-12
3.2.2 Signal Cable Connections of Stacked BTS3900 Cabinets 3-18
3.3 Transmission Cable Connections of the BTS3900 3-31
3.4 RF Cable Connections of the BTS3900 3-35
4 BTS3900 Components 4-1
4.1 List of BTS3900 Components 4-3
4.2 BBU3900 Equipment 4-3

4.2.1 Appearance of the BBU3900 4-4
4.2.2 Engineering Specifications of the BBU 4-4
4.2.3 Boards and Modules of the BBU3900 4-5
4.3 DRFU 4-15
4.4 DCDU-01 4-19
4.5 GATM 4-21
4.6 FAN Unit 4-23
4.7 EMU 4-25
4.8 Power Subrack (AC/DC) 4-25
4.8.1 PMU 4-25
4.8.2 PSU (AC/DC) 4-30
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4.8.3 Wiring Unit of the Power Subrack (220 V) 4-31
4.9 Power Subrack (DC/DC) 4-32
4.9.1 PSU (DC/DC) 4-32
4.9.2 Wiring Unit of the Power Subrack (+24 V) 4-34
5 BTS3900 Cables 5-1
5.1 List of the BTS3900 Cables 5-2
5.2 BTS3900 Power Cables and PGND Cables 5-5
5.2.1 BTS3900 PGND Cable 5-6
5.2.2 BTS3900 Equipotential Cable 5-7
5.2.3 BTS3900 -48 V Input Power Cable 5-8
5.2.4 BTS3900 +24 V Input Power Cable 5-9
5.2.5 BTS3900 220 V Input Power Cable 5-10
5.2.6 Power Cable Between the PSU (AC/DC) and the DCDU 5-11
5.2.7 Power Cable Between the PSU (DC/DC) and the DCDU 5-12

5.2.8 Power Cable Between the DCDU and the DRFU 5-13
5.2.9 Power Cable Between the DCDU and the GATM 5-15
5.2.10 Power Cable Between the DCDU and the FAN Unit 5-16
5.2.11 Power Cable Between the DCDU and the BBU 5-17
5.3 BTS3900 Transmission Cables 5-18
5.3.1 E1 Cable 5-19
5.3.2 E1 Surge Protection Transfer Cable 5-21
5.3.3 CPRI Cable 5-22
5.3.4 Signal Cable Between the Cascaded DRFUs 5-22
5.4 BTS3900 Signal Cables 5-23
5.4.1 Monitoring Signal Cables for the DCDU-01 5-24
5.4.2 In-Position Signal Cable for the PSU (DC/DC) 5-25
5.4.3 Monitoring Signal Cable for the PMU 5-26
5.4.4 Monitoring Signal Cable for the EMU 5-27
5.4.5 Monitoring Signal Cable for the GATM 5-28
5.4.6 BBU Alarm Cable 5-29
5.4.7 RET Control Signal Cable 5-29
5.4.8 Monitoring Signal Cable for the FAN Unit 5-30
5.4.9 Signal Cable Between the Cascaded FAN Units 5-31
5.5 BTS3900 RF Cables 5-31
5.5.1 RF Jumper 5-32
5.5.2 Inter-DRFU RF Signal Cable 5-32
Contents
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Figures
Figure 1-1 BTS3900 system 1-1

Figure 2-1 Appearance of the BTS3900 cabinet 2-2
Figure 2-2 Typical configurations of the BTS3900 -48 V cabinet 2-4
Figure 2-3 Typical configurations of the BTS3900 +24 V cabinet 2-6
Figure 2-4 Typical configurations of the BTS3900 220 V cabinet 2-8
Figure 3-1 Power cable connections of a single -48 V cabinet 3-2
Figure 3-2 Power cable connections of two stacked cabinets 3-4
Figure 3-3 Power cable connections of a single +24 V cabinet 3-5
Figure 3-4 Power cable connections of two stacked cabinets 3-7
Figure 3-5 Power cable connections of a single 220 V cabinet 3-9
Figure 3-6 Power cable connections of two stacked cabinets 3-11
Figure 3-7 Signal Cable Connections in a -48 V Cabinet (1) 3-13
Figure 3-8 Signal cable connections in a -48 V cabinet (2) 3-14
Figure 3-9 Signal cable connections in a +24 V cabinet (1) 3-15
Figure 3-10 Signal cable connections in a +24 V cabinet (2) 3-16
Figure 3-11 Signal cable connections in a 220 V cabinet (1) 3-17
Figure 3-12 Signal cable connections in a 220 V cabinet (2) 3-18
Figure 3-13 Signal cable connections of stacked cabinets (1) 3-20
Figure 3-14 Signal cable connections of stacked cabinets (2) 3-22
Figure 3-15 Signal cable connections of stacked cabinets (3) 3-24
Figure 3-16 Signal cable connections of stacked cabinets (4) 3-26
Figure 3-17 Signal cable connections of stacked cabinets (5) 3-28
Figure 3-18 Signal cable connections of stacked cabinets (6) 3-30
Figure 3-19 Transmission cable connections of a single cabinet (1) 3-32
Figure 3-20 Transmission cable connections of a single cabinet (2) 3-33
Figure 3-21 Transmission cable Connections of two stacked cabinets 3-34
Figure 3-22 RF cable connections of a single cabinet 3-36
Figure 3-23 RF cable connections of two stacked cabinets 3-37
Figure 4-1 BBU3900 4-4
Figure 4-2 Panel of the UEIU 4-6
Figure 4-3 GTMU panel 4-7

Figure 4-4 Panel of the UELP 4-11
Figure 4-5 DIP switch on the UELP 4-12
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Hardware Description Figures
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Figure 4-6 Panel of the UBFA 4-13
Figure 4-7 Panel of the UPEA 4-14
Figure 4-8 Panel of the UPEB 4-14
Figure 4-9 DRFU panel 4-16
Figure 4-10 Functional structure of the DRFU 4-17
Figure 4-11 Appearance of the DCDU-01 4-20
Figure 4-12 Working principles of the DCDU-01 4-21
Figure 4-13 GATM panel 4-22
Figure 4-14 Panel of the FAN unit 4-23
Figure 4-15 Ports on the front panel of the PMU 4-26
Figure 4-16 Ports on the rear panel of the PMU 4-26
Figure 4-17 DIP switch on the PMU 4-29
Figure 4-18 Panel 4-30
Figure 4-19 Power subrack (AC/DC) 4-32
Figure 4-20 Panel 4-33
Figure 4-21 Power subrack (DC/DC) 4-34
Figure 5-1 PGND cable 5-7
Figure 5-2 Equipotential cable 5-8
Figure 5-3 -48 V input power cable 5-8
Figure 5-4 +24 V Input power cable 5-9
Figure 5-5 220 V Input power cable 5-10
Figure 5-6 Power cable between the PSU (AC/DC) and the DCDU 5-11
Figure 5-7 Power cable between the PSU (DC/DC) and the DCDU 5-12

Figure 5-8 Power cable between the DCDU and the DRFU 5-14
Figure 5-9 Power cable between the DCDU and the GATM 5-15
Figure 5-10 Power cable between the DCDU and the FAN unit 5-16
Figure 5-11 Power cable between the DCDU and the BBU 5-18
Figure 5-12 E1 cable 5-19
Figure 5-13 E1 surge protection transfer cable 5-21
Figure 5-14 CPRI cable 5-22
Figure 5-15 Signal cable between cascaded DRFUs 5-23
Figure 5-16 Monitoring signal cable 1 for the DCDU-01 5-24
Figure 5-17 Monitoring signal cable 2 for the DCDU-01 5-24
Figure 5-18 In-position signal cable for the PSU (DC/DC) 5-25
Figure 5-19 Monitoring signal cable for the PMU 5-26
Figure 5-20 Monitoring signal cable for the EMU 5-27
Figure 5-21 Monitoring signal cable for the GATM 5-28
Figure 5-22 BBU alarm cable 5-29
Figure 5-23 RET control signal cable 5-30
Figure 5-24 Monitoring signal cable for the FAN unit 5-30
Figure 5-25 Signal cable between the cascaded FAN units 5-31
Figure 5-26 RF jumper 5-32
Figures
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Figure 5-27 Inter-DRFU RF signal cable 5-33
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v

Tables
Table 3-1 Power cable connections of a single -48 V cabinet 3-3
Table 3-2 Power cable connections of two stacked cabinets 3-5
Table 3-3 Power cable connections of a single +24 V cabinet 3-6
Table 3-4 Power cable connections of two stacked cabinets 3-8
Table 3-5 Power cable connections of a single 220 V cabinet 3-9
Table 3-6 Power cable connections of two stacked cabinets 3-12
Table 3-7 Signal cable connections in a -48 V cabinet (1) 3-13
Table 3-8 Signal cable connections in a -48 V cabinet (2) 3-14
Table 3-9 Signal cable connections in a +24 V cabinet (1) 3-15
Table 3-10 Signal cable connections in a +24 V cabinet (2) 3-16
Table 3-11 Signal cable connections in a 220 V cabinet (1) 3-17
Table 3-12 Signal cable connections in a 220 V cabinet (2) 3-18
Table 3-13 Signal cable connections of stacked cabinets (1) 3-21
Table 3-14 Signal cable connections of stacked cabinets (2) 3-23
Table 3-15 Signal cable connections of stacked cabinets (3) 3-25
Table 3-16 Signal cable connections of stacked cabinets (4) 3-27
Table 3-17 Signal cable connections of stacked cabinets (5) 3-29
Table 3-18 Signal cable connections of stacked cabinets (6) 3-31
Table 3-19 Transmission cable connections of a single cabinet (1) 3-32
Table 3-20 Transmission cable connections of a single cabinet (2) 3-33
Table 3-21 Transmission cable Connections of two stacked cabinets 3-35
Table 3-22 RF cable connections of a single cabinet 3-36
Table 3-23 RF cable connections of two stacked cabinets 3-38
Table 4-1 Component List 4-3
Table 4-2 Mechanical dimensions of the BBU 4-4
Table 4-3 Weight of the BBU 4-5
Table 4-4 Power input of the BBU 4-5

Table 4-5 Ports on the UEIU 4-6
Table 4-6 LEDs on the GTMU 4-7
Table 4-7 Ports on the GTMU panel 4-8
Table 4-8 Settings of S1 4-10
Table 4-9 Settings of S2 4-10
Table 4-10 Settings of S4 4-10
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Table 4-11 Settings of S5 4-11
Table 4-12 Ports on the UELP 4-12
Table 4-13 DIP switch on the UELP 4-12
Table 4-14 LED on the UBFA 4-14
Table 4-15 LED on the UPEU 4-15
Table 4-16 Ports on the UPEU 4-15
Table 4-17 LEDs on the DRFU panel 4-18
Table 4-18 Ports on the DRFU panel 4-19
Table 4-19 Ports on the DCDU-01 panel 4-21
Table 4-20 LEDs on the GATM panel 4-22
Table 4-21 Ports on the GATM 4-23
Table 4-22 LEDs on the panel of the FAN unit 4-24
Table 4-23 Ports on the panel of the FAN unit 4-24
Table 4-24 Ports on the PMU 4-27
Table 4-25 LEDs on the PMU 4-27
Table 4-26 Settings of the DIP switch 4-29
Table 4-27 Meaning 4-31
Table 4-28 LEDs 4-33
Table 5-1 Cable list 5-2

Table 5-2 Installation positions of the cabinet PGND cable 5-7
Table 5-3 Installation positions of the internal PGND cables 5-7
Table 5-4 Installation positions of the equipotential cable 5-8
Table 5-5 Installation positions of the -48 V input power cable 5-9
Table 5-6 Installation positions of the +24 V input power cable 5-9
Table 5-7 Specifications of the 220 V input power cable 5-10
Table 5-8 Installation positions of the 220 V input power cable 5-10
Table 5-9 Installation positions of the power cable between the PSU (AC/DC) and the DCDU in the 220 V cabinet
5-12
Table 5-10 Installation positions of the power cable between the PSU (AC/DC) and the DCDU in the -48 V cabinet
5-12
Table 5-11 Installation positions of the power cable between the PSU (DC/DC) and the DCDU in the +24 V cabinet
5-13
Table 5-12 Installation positions of the power cable between the PSU (DC/DC) and the DCDU in the -48 V cabinet
5-13
Table 5-13 Pin assignment of the power cable between the DCDU and the DRFU 5-14
Table 5-14 Installation positions of the power cable between the DCDU and the DRFU 5-14
Table 5-15 Pin assignment of the power cable between the DCDU and the GATM 5-16
Table 5-16 Installation positions of the power cable between the DCDU and the GATM 5-16
Table 5-17 Pin assignment of the power cable between the DCDU and the FAN unit 5-17
Table 5-18 Installation positions of the power cable between the DCDU and the FAN unit 5-17
Table 5-19 Pin assignment of the power cable between the DCDU and the BBU 5-18
Table 5-20 Installation positions of the power cable between the DCDU and the BBU 5-18
Table 5-21 Pin assignment for the wires of the 75-ohm E1 coaxial cable 5-19
Tables
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Table 5-22 Pin assignment for the wires of the 120-ohm E1 twisted pairs 5-20
Table 5-23 Pin assignment for wires of the E1 surge protection transfer cable 5-21
Table 5-24 Pin assignment of the monitoring signal cable 1 for the DCDU-01 5-24
Table 5-25 Pin assignment of the in-position signal cable for the PSU (DC/DC) 5-25
Table 5-26 Pin assignment of the monitoring signal cable for the PMU 5-26
Table 5-27 Pin assignment of the monitoring signal cable for the EMU 5-27
Table 5-28 Pin assignment of the monitoring signal cable for the GATM 5-28
Table 5-29 Pin assignment for the wires of the BBU alarm cable 5-29
Table 5-30 Pin assignment of the monitoring signal cable for the FAN unit 5-30
Table 5-31 Pin assignment of the signal cable between the cascaded FAN units 5-31
BTS3900 GSM
Hardware Description Tables
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ix

About This Document
Purpose
This document provides an overview of the BTS3900 GSM hardware for the planning and
deployment of the BTS3900 GSM. It describes the configurations, functions, and specifications
of the components in the BTS3900 GSM cabinet. This document also describes the classification,
connector specification, and installation positions of the cables.
Product Version
The following table lists the product version related to this document.
Product Name
Product Version
BTS3900 GSM (hereinafter referred to as
BTS3900)
V300R008

Intended Audience
This document is intended for:
l BTS installers
l Site maintainers
Change History
For changes in the document, refer to Changes in BTS3900 GSM Hardware Description.
Organization
1 System Architecture of the BTS3900
The BTS3900 consists of the BBU3900, the DRFUs, and the indoor macro cabinet. The
BBU3900 and the DRFUs are installed in the indoor macro cabinet.
2 BTS3900 Cabinet
The BTS3900 cabinet is designed in compliance with the IEC297 standard and features a
modular structure. It processes the baseband signals and the RF signals.
3 Cable Connections of the BTS3900
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1
The cable connections of the BTS3900 involve the connections of the power cables, signal
cables, transmission cables, and RF cables.
4 BTS3900 Components
The BTS3900 components are the BBU, DRFU, DCDU-01, GATM, PMU, PSU, and FAN unit.
5 BTS3900 Cables
The BTS3900 cables consist of the power cables, signal cables, transmission cables, and RF
cables.
Conventions
1. Symbol Conventions
The following symbols may be found in this document. They are defined as follows
Symbol Description

DANGER
Indicates a hazard with a high level of risk that, if not avoided,
will result in death or serious injury.
WARNING
Indicates a hazard with a medium or low level of risk which, if
not avoided, could result in minor or moderate injury.
CAUTION
Indicates a potentially hazardous situation that, if not avoided,
could cause equipment damage, data loss, and performance
degradation, or unexpected results.
TIP
Indicates a tip that may help you solve a problem or save your
time.
NOTE
Provides additional information to emphasize or supplement
important points of the main text.
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
About This Document
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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.
{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

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.
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Action Description
Drag Press and hold the primary mouse button and move the pointer
to a certain position.
About This Document
BTS3900 GSM
Hardware Description
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1 System Architecture of the BTS3900
The BTS3900 consists of the BBU3900, the DRFUs, and the indoor macro cabinet. The
BBU3900 and the DRFUs are installed in the indoor macro cabinet.
Figure 1-1 shows the BTS3900 system.
Figure 1-1 BTS3900 system
DRFU
Indoor cabinet
BBU
The BTS3900 mainly consists of the following components:
l The BBU3900 is used for baseband processing and enables interaction between the BTS

and the BSC.
l The DRFU is a double radio filter unit that processes two carriers. The DRFU performs
modulation and demodulation between baseband signals and RF signals, processes data,
and combines and divides signals.
l The indoor macro cabinet houses the BBU3900 and DRFUs. In addition, the indoor macro
cabinet provides the functions such as power distribution, heat dissipation, and surge
protection.
BTS3900 GSM
Hardware Description 1 System Architecture of the BTS3900
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1-1

2 BTS3900 Cabinet
About This Chapter
The BTS3900 cabinet is designed in compliance with the IEC297 standard and features a
modular structure. It processes the baseband signals and the RF signals.
Based on the types of external power input, the BTS3900 cabinets can be classified as follows:
l The BTS3900 -48 V cabinet: contains the DRFU, BBU, GATM, DCDU-01, and FAN unit.
l The BTS3900 +24 V cabinet: contains the DRFU, BBU, DCDU-01, FAN unit, and power
subrack (DC/DC).
l The BTS3900 220 V cabinet: contains the DRFU, BBU, DCDU-01, FAN unit, and power
subrack (AC/DC).
2.1 Appearance of the BTS3900 Cabinet
The BTS3900 cabinet is designed in compliance with the IEC297 standard. It is purple gray in
color and vertical in appearance.
2.2 Structure of the BTS3900 Cabinet
The BTS3900 cabinet supports three types of power input: -48 V DC, +24 V DC, and 220 V
AC. The cabinets that support different types of input power are different in structure, mainly
in power distribution unit.

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2-1
2.1 Appearance of the BTS3900 Cabinet
The BTS3900 cabinet is designed in compliance with the IEC297 standard. It is purple gray in
color and vertical in appearance.
Figure 2-1 shows the BTS3900 cabinet.
Figure 2-1 Appearance of the BTS3900 cabinet
2.2
Structure of the BTS3900 Cabinet
The BTS3900 cabinet supports three types of power input: -48 V DC, +24 V DC, and 220 V
AC. The cabinets that support different types of input power are different in structure, mainly
in power distribution unit.
2.2.1 Structure of the BTS3900 -48 V Cabinet
The external power input to the BTS3900 -48 V cabinet is -48 V DC. The DC power is directly
led into the DCDU-01 and the DCDU-01 distributes the DC power to each component in the
cabinet. The BTS3900 -48 V cabinet can be installed alone or stacked on top of another BTS3900
-48 V cabinet.
2.2.2 Structure of the BTS3900 +24 V Cabinet
The external power input to the BTS3900 +24 V cabinet is +24 V DC. After the PSU (DC/DC)
transforms +24 V DC into -48 V DC, the DCDU-01 distributes the -48 V DC power to each
component in the cabinet. The BTS3900 +24 V cabinet can be installed alone or stacked with a
BTS3900 -48 V cabinet.
2.2.3 Structure of the BTS3900 220 V Cabinet
The external power input to the BTS3900 220 V cabinet is 220 V AC. After the PSU (AC/DC)
transforms 220 V AC into -48 V DC, the DCDU-01 distributes the -48 V DC power to each
2 BTS3900 Cabinet
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component in the cabinet. The BTS3900 220 V cabinet can be installed alone or stacked with a
BTS3900 -48 V cabinet.
2.2.1 Structure of the BTS3900 -48 V Cabinet
The external power input to the BTS3900 -48 V cabinet is -48 V DC. The DC power is directly
led into the DCDU-01 and the DCDU-01 distributes the DC power to each component in the
cabinet. The BTS3900 -48 V cabinet can be installed alone or stacked on top of another BTS3900
-48 V cabinet.
The BTS3900 -48 V cabinet contains the following components: the DRFU, BBU, GATM,
DCDU-01, and FAN unit, among which the GATM is optional. Figure 2-2 shows the typical
configurations when the cabinet is installed alone and when one cabinet is stacked on another.
BTS3900 GSM
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2-3
Figure 2-2 Typical configurations of the BTS3900 -48 V cabinet
One cabinet Two cabinets in stack mode
(1) DRFU (2) FAN unit
(3) GATM (4) BBU
(5) DCDU-01 -
NOTE
When two BTS3900 -48 V cabinets are installed in stack mode, the BBU is installed only in the lower
cabinet and serves as the baseband control unit for the two cabinets.
2 BTS3900 Cabinet
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Hardware Description

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2.2.2 Structure of the BTS3900 +24 V Cabinet
The external power input to the BTS3900 +24 V cabinet is +24 V DC. After the PSU (DC/DC)
transforms +24 V DC into -48 V DC, the DCDU-01 distributes the -48 V DC power to each
component in the cabinet. The BTS3900 +24 V cabinet can be installed alone or stacked with a
BTS3900 -48 V cabinet.
The BTS3900 +24 V cabinet contains the following components: the DRFU, BBU, DCDU-01,
PSU (DC/DC), and FAN unit. Figure 2-3 shows the typical configurations when the cabinet is
installed alone and when one cabinet is stacked on another.
BTS3900 GSM
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Figure 2-3 Typical configurations of the BTS3900 +24 V cabinet
One cabinet Two cabinets in stack mode
(1) DRFU (2) FAN unit (3) BBU
(4) DCDU-01 (5) Wiring unit (6) PSU (DC/DC)
2 BTS3900 Cabinet
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NOTE
l When the two cabinets are stacked, the BTS3900 -48 V cabinet should be stacked on top of the +24 V
cabinet.
l When the -48 V cabinet is stacked on the +24 V cabinet, a maximum of nine DRFUs can be configured.

l When two cabinets are stacked, the BBU is installed only in the lower cabinet and serves as the baseband
control unit for the two cabinets.
2.2.3 Structure of the BTS3900 220 V Cabinet
The external power input to the BTS3900 220 V cabinet is 220 V AC. After the PSU (AC/DC)
transforms 220 V AC into -48 V DC, the DCDU-01 distributes the -48 V DC power to each
component in the cabinet. The BTS3900 220 V cabinet can be installed alone or stacked with a
BTS3900 -48 V cabinet.
The BTS3900 220 V cabinet contains the following components: the DRFU, BBU, DCDU-01,
PMU, PSU (AC/DC), and FAN unit. Figure 2-4 shows the typical configurations when the
cabinet is installed alone and when one cabinet is stacked on another.
BTS3900 GSM
Hardware Description 2 BTS3900 Cabinet
Issue 03 (2008-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd
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