bts3900 gsm hardware description-(v300r008&009_03)
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BTS3900 GSM
V300R008&009
Hardware Description
Issue 03
Date 2009-12-30
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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Contents
About This Document.....................................................................................................................1
1 Changes in the BTS3900 GSM Hardware Description.......................................................1-1
2 BTS3900 System..........................................................................................................................2-1
3 BTS3900 Cabinet.........................................................................................................................3-1
3.1 Structure of the BTS3900 Cabinet..................................................................................................................3-2
3.2 Hardware Str ucture of the BTS3900...............................................................................................................3-2
3.2.1 Structure of the BTS3900 -48 V Cabinet...............................................................................................3-3
3.2.2 Structure of the BTS3900 +24 V Cabinet..............................................................................................3-6
3.2.3 Structure of the BTS3900 220 V Cabinet..............................................................................................3-7
4 BTS3900 Components................................................................................................................4-1
4.1 BBU3900 Equipment......................................................................................................................................4-2
4.1.1 Structure of the BBU3900......................................................................................................................4-2
4.1.2 Boar ds and Module of the BBU3900.....................................................................................................4-3
4.2 DCDU-01......................................................................................................................................................4-19
4.3 Fan Box.........................................................................................................................................................4-20
4.4 DRFU............................................................................................................................................................4-21
4.5 GR FU............................................................................................................................................................4-26
4.6 GATM...........................................................................................................................................................4-31
4.7 ELU...............................................................................................................................................................4-32
4.8 SLPU.............................................................................................................................................................4-33
4.8.1 Structur e of SLPU................................................................................................................................4-33
4.8.2 Board Configuration of the SLPU........................................................................................................4-344.8.3 UELP....................................................................................................................................................4-35
4.8.4 UFLP....................................................................................................................................................4-37
4.8.5 USLP2..................................................................................................................................................4-37
4.9 DC/DC Power System...................................................................................................................................4-39
4.9.1 Components of the DC/DC Power System..........................................................................................4-39
4.9.2 PSU (DC/DC).......................................................................................................................................4-40
4.9.3 Power Subrack (DC/DC)......................................................................................................................4-41
4.10 AC/DC Power System.................................................................................................................................4-42
4.10.1 Components of the AC/DC Power System........................................................................................4-43
4.10.2 PMU...................................................................................................................................................4-44
BTS3900 GSM
Hardware Description Contents
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4.10.3 PSU (AC/DC).....................................................................................................................................4-47
4.10.4 Power Subrack (AC/DC)....................................................................................................................4-49
5 BTS3900 Cables...........................................................................................................................5-1
5.1 List of BTS3900 Cables..................................................................................................................................5-35.2 PGND Cables..................................................................................................................................................5-8
5.3 Equipotential Cable.........................................................................................................................................5-9
5.4 BTS3900 Power Cable....................................................................................................................................5-9
5.4.1 Power Cable Connections of the BTS3900..........................................................................................5-10
5.4.2 Power Input Cable of the Cabinet........................................................................................................5-17
5.4.3 DCDU-01 Power Cable........................................................................................................................5-19
5.4.4 BBU Power Cable................................................................................................................................5-20
5.4.5 Fan Power Cable..................................................................................................................................5-21
5.4.6 RFU Power Cable.................................................................................................................................5-21
5.4.7 Power Cable for the GATM.................................................................................................................5-22
5.5 BTS3900 Transmission Cable.......................................................................................................................5-23
5.5.1 Transmission Cable Connections.........................................................................................................5-23
5.5.2 E1/T1 Cable..........................................................................................................................................5-25
5.5.3 FE/GE Cable........................................................................................................................................5-27
5.6 BTS3900 Signal Cable..................................................................................................................................5-28
5.6.1 Signal Cable Connections of the BTS3900..........................................................................................5-29
5.6.2 Monitoring Signal Cable for the PMU.................................................................................................5-44
5.6.3 Monitoring Signal Cable for the PSU (DC/DC)..................................................................................5-44
5.6.4 In-Position Signal Cable for the PSU (DC/DC)...................................................................................5-45
5.6.5 Monitoring signal cable for the FAN unit............................................................................................5-46
5.6.6 Fan Cascade Signal Cable....................................................................................................................5-46
5.6.7 Monitoring Signal Cable for the EMU.................................................................................................5-47
5.6.8 Monitoring Signal Cable for the GATM..............................................................................................5-48
5.6.9 BBU Alarm Cable................................................................................................................................5-49
5.6.10 GPS Clock Signal Cable....................................................................................................................5-51
5.6.11 Signal Cable for the ELU...................................................................................................................5-51
5.7 BTS3900 RF Cable.......................................................................................................................................5-52
5.7.1 RF Cable Connections of the BTS3900...............................................................................................5-525.7.2 RF Jumper............................................................................................................................................5-57
5.7.3 Inter-RFU RF Signal Cable..................................................................................................................5-57
5.8 BTS3900 CPRI Electrical Cable...................................................................................................................5-57
5.8.1 CPRI Electrical Cable Connections of the BTS3900...........................................................................5-58
5.8.2 CPRI Electrical Cable..........................................................................................................................5-61
6 BTS3900 Auxiliary Equipment................................................................................................6-1
6.1 PS4890 Cabinet...............................................................................................................................................6-2
6.1.1 Cable Connections Between the BTS3900 and the PS4890..................................................................6-2
6.2 EMU................................................................................................................................................................6-3
Contents
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Figures
Figure 2-1 BTS3900 system.................................................................................................................................2-1
Figure 3-1 BTS3900 cabinet................................................................................................................................3-2
Figure 3-2 Ty pical configuration of the BTS3900 -48 V cabinet in single cabinet installation............. .............3-3
Figure 3-3 Ty pical configuration of two BTS3900 -48 V cabinets in side-by-side installation..........................3-4
Figure 3-4 Ty pical configuration of two BTS3900 -48 V cabinets in stack installation......................... ............3-5
Figure 3-5 Ty pical configuration of the Structure of the vehicle-mounted cabinet......................................... ....3-6
Figure 3-6 Ty pical configuration of the BTS3900 +24 V cabinet in single cabinet installation............ ........... ..3-6
Figure 3-7 Ty pical configuration of the BTS3900 +24 V cabinet in double cabinet installation........................3-7
Figure 3-8 Ty pical configuration of the BTS3900 220 V cabinets in single cabinet installation................... .....3-8
Figure 3-9 Ty pical configuration of the BTS3900 220 V cabinets in double cabinet installation.......................3-8
Figure 4-1 BBU3900............................................................................................................................................4-2
Figure 4-2 Slots of the BBU3900 ........................................................................................................................4-3
Figure 4-3 Ty pical configuration of the BBU3900..............................................................................................4-4
Figure 4-4 GTMU panel.......................................................................................................................................4-4Figure 4-5 GTMUb panel.....................................................................................................................................4-5
Figure 4-6 Panel of the UPEUA...........................................................................................................................4-9
Figure 4-7 Panel of the UPEUB.........................................................................................................................4-10
Figure 4-8 Slots in the BBU...............................................................................................................................4-10
Figure 4-9 Panel of the UEIU.............................................................................................................................4-11
Figure 4-10 Panel of the FAN............................................................................................................................4-13
Figure 4-11 Panels of the USCU (0.5 U)...........................................................................................................4-14
Figure 4-12 Panels of the USCU (1 U)..............................................................................................................4-14
Figure 4-13 Panel of the UTRP..........................................................................................................................4-16
Figure 4-14 DIP switches on the UTRP.............................................................................................................4-18
Figure 4-15 Panel of the DCDU-01...................................................................................................................4-19
Figure 4-16 Panel of the Fan box.......................................................................................................................4-20
Figure 4-17 DRFU panel....................................................................................................................................4-22
Figure 4-18 Functional structure of the DRFU..................................................................................................4-23
Figure 4-19 GRFU panel....................................................................................................................................4-27
Figure 4-20 Logical structure of the GRFU.......................................................................................................4-28
Figure 4-21 GATM panel...................................................................................................................................4-31
Figure 4-22 Structure of an ELU........................................................................................................................4-33
Figure 4-23 Structure of SLPU..........................................................................................................................4-34
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Figure 4-24 Slots of the SLPU...........................................................................................................................4-34
Figure 4-25 Panel of the UELP .........................................................................................................................4-35
Figure 4-26 DIP switch on the UELP ...............................................................................................................4-36
Figure 4-27 Panel of the UFLP..........................................................................................................................4-37
Figure 4-28 Panel of the USLP2........................................................................................................................4-38
Figure 4-29 DIP switches on the USLP2...........................................................................................................4-38
Figure 4-30 DC/DC power system.....................................................................................................................4-39
Figure 4-31 Panel of the PSU (DC/DC).............................................................................................................4-40
Figure 4-32 Power Subrack (DC/DC)................................................................................................................4-42
Figure 4-33 AC/DC power system.....................................................................................................................4-43
Figure 4-34 PMU................................................................................................................................................4-44
Figure 4-35 Front panel of the PMU..................................................................................................................4-45
Figure 4-36 R ight panel of the PMU..................................................................................................................4-47
Figure 4-37 Panel of the PSU (AC/DC).............................................................................................................4-47
Figure 4-38 Panel of the power subrack (AC/DC).............................................................................................4-49
Figure 5-1 PG ND cable for the cabinet................................................................................................................5-8
Figure 5-2 PG ND cable for the modules..............................................................................................................5-8
Figure 5-3 Equipotential cable.............................................................................................................................5-9
Figure 5-4 Power cables connections of a single cabinet...................................................................................5-10
Figure 5-5 Power cable connections of two cabinets in side-by-side installation..............................................5-11
Figure 5-6 Power cable connections of two cabinets in stack installation.........................................................5-12
Figure 5-7 Power cable connections of a single cabinet....................................................................................5-13
Figure 5-8 Power cable connections of two cabinets in side-by-side installation..............................................5-14Figure 5-9 Power cable connections of a single cabinet....................................................................................5-15
Figure 5-10 Power cable connections of two cabinets in side-by-side installation............................................5-16
Figure 5-11 Structure of the -48 V power cable.................................................................................................5-17
Figure 5-12 Structure of the +24 V power cable................................................................................................5-18
Figure 5-13 Structure of an AC power cable (220 V AC, single phase)............................................................5-18
Figure 5-14 Structure of the power cable...........................................................................................................5-19
Figure 5-15 Structure of the BBU power cable..................................................................................................5-20
Figure 5-16 Structure of the FAN power cable..................................................................................................5-21
Figure 5-17 Structure of the RFU power cable..................................................................................................5-22
Figure 5-18 Power cable for the GATM............................................................................................................5-23
Figure 5-19 E1/T1 transmission cable connections (1)......................................................................................5-24
Figure 5-20 E1/T1 transmission cable connections (2)......................................................................................5-24
Figure 5-21 FE/GE transmission cable connections..........................................................................................5-25
Figure 5-22 E1/T1 cable.....................................................................................................................................5-25
Figure 5-23 FE/GE cable....................................................................................................................................5-27
Figure 5-24 Signal cable connections in a -48 V cabinet (1).............................................................................5-30
Figure 5-25 Signal cable connections in a -48 V cabinet (2).............................................................................5-31
Figure 5-26 Signal cable connections in a +24 V cabinet (1) ...........................................................................5-32
Figure 5-27 Signal cable connections in a +24 V cabinet (2)............................................................................5-33
Figures
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Figure 5-28 Signal cable connections in a 220 V cabinet (1).............................................................................5-34
Figure 5-29 Signal cable connections in a 220 V cabinet (2).............................................................................5-35
Figure 5-30 GPS signal cable.............................................................................................................................5-36
Figure 5-31 Signal cable connections in two -48 V cabinets (1).......................................................................5-37
Figure 5-32 Signal cable connections in two -48 V cabinets (2).......................................................................5-38
Figure 5-33 Signal cable connections in two -48 V cabinets (3).......................................................................5-39
Figure 5-34 Signal cable connections in two -48 V cabinets (4).......................................................................5-40
Figure 5-35 Signal cable connections in two +24 V cabinets............................................................................5-41
Figure 5-36 Signal cable connections in two 220 V cabinets............................................................................5-43
Figure 5-37 Monitoring signal cable for the PMU.............................................................................................5-44
Figure 5-38 Monitoring signal cable for the PSU (DC/DC)..............................................................................5-45
Figure 5-39 In-position signal cable for the PSU (DC/DC)...............................................................................5-45
Figure 5-40 Monitoring signal cable for the FAN unit......................................................................................5-46
Figure 5-41 Fan Cascade Signal Cable..............................................................................................................5-47
Figure 5-42 Monitoring signal cable for the EMU.............................................................................................5-48
Figure 5-43 Monitoring signal cable for the GATM..........................................................................................5-48
Figure 5-44 BBU alarm cable............................................................................................................................5-49
Figure 5-45 GPS clock signal cable...................................................................................................................5-51
Figure 5-46 Signal cable for the ELU................................................................................................................5-51
Figure 5-47 R F cable connections of a single cabinet........................................................................................5-53
Figure 5-48 R F cable connections of a single cabinet........................................................................................5-53
Figure 5-49 R F cable connections of two cabinets in side-by-side installation.................................................5-54
Figure 5-50 R F cable connections of two cabinets in side-by-side installation.................................................5-55Figure 5-51 R F cable connections of stacked cabinets......................................................................................5-56
Figure 5-52 R F jumper.......................................................................................................................................5-57
Figure 5-53 Inter-RFU RF signal cable..............................................................................................................5-57
Figure 5-54 CPRI electrical cable connections (1).............................................................................................5-58
Figure 5-55 CPRI electrical cable connections (2).............................................................................................5-59
Figure 5-56 CPRI electrical cable connections (3).............................................................................................5-60
Figure 5-57 CPRI electrical cable......................................................................................................................5-61
Figure 6-1 Ca ble connections between the BTS3900 and the PS4890....................... ......................... ................6-2
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Tables
Table 2-1 Component List....................................................................................................................................2-2
Table 4-1 Board configuration principles of the BBU3900.................................................................................4-3
Table 4-2 LEDs on the GTMU.............................................................................................................................4-5
Table 4-3 Por ts on the GTMU..............................................................................................................................4-6
Table 4-4 Details of the DIP Switch S1...............................................................................................................4-7
Table 4-5 Details of the DIP Switch S2...............................................................................................................4-8
Table 4-6 Details of the DIP Switch S4...............................................................................................................4-8
Table 4-7 Details of the DIP Switch S5...............................................................................................................4-8
Table 4-8 LEDs on the UPEU and its status......................................................................................................4-10
Table 4-9 Description on the ports on the panel of the UPEU...........................................................................4-11
Table 4-10 Ports on the panel of the UEIU........................................................................................................4-12
Table 4-11 LED on the FAN and its status........................................................................................................4-13
Table 4-12 LEDs on the USCU..........................................................................................................................4-14
Table 4-13 LEDs on the TOD port.....................................................................................................................4-15Table 4-14 Ports on the USCU...........................................................................................................................4-16
Table 4-15 LEDs on the panel of the UTRP......................................................................................................4-17
Table 4-16 Ports on the panel of the UTRP........................................................................................................4-17
Table 4-17 Settings of SW1 on the UTRP.........................................................................................................4-18
Table 4-18 Settings of SW2 on the UTRP.........................................................................................................4-18
Table 4-19 Settings of SW3 on the UTRP.........................................................................................................4-19
Table 4-20 Items on the panel of the DCDU-01................................................................................................4-20
Table 4-21 LEDs on the panel of the fan box.....................................................................................................4-21
Table 4-22 Ports on the panel of the fan box......................................................................................................4-21
Table 4-23 LEDs on the DRFU..........................................................................................................................4-24
Table 4-24 Ports and socket on the DRFU.........................................................................................................4-25
Table 4-25 LEDs on the GRFU..........................................................................................................................4-29
Table 4-26 Ports on the panel of the GRFU.......................................................................................................4-30
Table 4-27 LEDs on the GATM.........................................................................................................................4-31
Table 4-28 Ports and socket on the GATM........................................................................................................4-32
Table 4-29 Board configuration of the SLPU....................................................................................................4-34
Table 4-30 Ports on the panel of the UELP........................................................................................................4-36
Table 4-31 DIP switch on the UELP .................................................................................................................4-37
Table 4-32 Ports on the panel of the UFLP........................................................................................................4-37
BTS3900 GSM
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Table 4-33 Ports on the panels of the USLP2....................................................................................................4-38
Table 4-34 DIP switches on the USLP2.............................................................................................................4-39
Table 4-35 Components of the DC/DC power system.......................................................................................4-40
Table 4-36 LEDs on the panel of the PSU (DC/DC).........................................................................................4-41
Table 4-37 Ports and terminals on the power subrack (DC/DC)........................................................................4-42
Table 4-38 Components of the AC/DC power system.......................................................................................4-43
Table 4-39 Ports and switch on the PMU...........................................................................................................4-45
Table 4-40 LEDs on the panel of the PMU........................................................................................................4-46
Table 4-41 LEDs on the panel of the PSU (AC/DC).........................................................................................4-48
Table 4-42 Terminals and switch on the power subrack (AC/DC)....................................................................4-49
Table 5-1 PG ND Cables and Power Cables.........................................................................................................5-3
Table 5-2 Transmission Cables............................................................................................................................5-5
Table 5-3 CPRI Cables.........................................................................................................................................5-6
Table 5-4 Signal Cables........................................................................................................................................5-6
Table 5-5 RF Cables.............................................................................................................................................5-8
Table 5-6 Power cables of a single cabinet........................................................................................................5-10
Table 5-7 Power cables of two cabinets in side-by-side installation..................................................................5-11
Table 5-8 Power cables of two cabinets in stack installation.............................................................................5-13
Table 5-9 Power cables of a single cabinet........................................................................................................5-14
Table 5-10 Power cables of two cabinets in side-by-side installation................................................................5-15
Table 5-11 Power cables of a single cabinet......................................................................................................5-16
Table 5-12 Power cables of two cabinets in side-by-side installation................................................................5-16
Table 5-13 Description on the -48 V power cable..............................................................................................5-17Table 5-14 Description on the +24 V power cable.............................................................................................5-18
Table 5-15 Description on the 220 V power cable.............................................................................................5-19
Table 5-16 DCDU-01 power cable.....................................................................................................................5-20
Table 5-17 Pin assignment of the power cable between the DCDU and the BBU............................................5-20
Table 5-18 Pin assignment of the power cable between the DCDU and the FAN unit.....................................5-21
Table 5-19 Pin assignment of the power cable between the DCDU and the RFU.............................................5-22
Table 5-20 Pin assignment for the wires of the power cable for the GATM.....................................................5-23
Table 5-21 E1/T1 transmission cable connections (1).......................................................................................5-24
Table 5-22 E1/T1 transmission cable connections (2).......................................................................................5-24
Table 5-23 FE/GE transmission cable connections............................................................................................5-25
Table 5-24 Connector of the 75-ohm E1 coaxial cable......................................................................................5-25
Table 5-25 Pin assignment for the wires of the 75-ohm E1 coaxial cable.........................................................5-26
Table 5-26 Pin assignment for the wires of the 120-ohm E1 twisted pair cable................................................5-26
Table 5-27 Pin assignment for the wires of the FE/GE cable............................................................................5-28
Table 5-28 Signal cables in a -48 V cabinet (1).................................................................................................5-30
Table 5-29 Signal cables in a -48 V cabinet (2).................................................................................................5-31
Table 5-30 Signal cables in a +24 V cabinet (1)................................................................................................5-32
Table 5-31 Signal cables in a +24 V cabinet (2)................................................................................................5-33
Table 5-32 Signal cables in a 220 V cabinet (1).................................................................................................5-34
Tables
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Table 5-33 Signal cables in a 220 V cabinet (2).................................................................................................5-35
Table 5-34 GPS signal cable..............................................................................................................................5-36
Table 5-35 Signal cables in two -48 V cabinets (1)...........................................................................................5-37
Table 5-36 Signal cables in two -48 V cabinets (2)...........................................................................................5-38
Table 5-37 Signal cables in two -48 V cabinets (3)...........................................................................................5-39
Table 5-38 Signal cables in two -48 V cabinets (4)...........................................................................................5-41
Table 5-39 Signal cables in two +24 V cabinets (1)...........................................................................................5-42
Table 5-40 Signal cables in two 220 V cabinets (1)...........................................................................................5-43
Table 5-41 Pin assignment of the monitoring signal cable of the PMU.............................................................5-44
Table 5-42 Pin assignment of the in-position signal cable for the PSU (DC/DC).............................................5-45
Table 5-43 Pin assignment of the monitoring signal cable for the FAN unit.....................................................5-46
Table 5-44 Pin assignment of the fan cascade signal cable................................................................................5-47
Table 5-45 Pin assignment of the monitoring signal cable for the EMU...........................................................5-48
Table 5-46 Pin assignment for the wires of the monitoring signal cable for the GATM...................................5-49
Table 5-47 Wire sequence of the BBU alarm cable...........................................................................................5-50
Table 5-48 Pin assignment of the signal cable for the ELU...............................................................................5-52
Table 5-49 RF cables of a single cabinet............................................................................................................5-53
Table 5-50 RF cables of a single cabinet............................................................................................................5-54
Table 5-51 RF cables of two cabinets in side-by-side installations...................................................................5-54
Table 5-52 RF cables of two cabinets in side-by-side installation.....................................................................5-55
Table 5-53 RF cables of stacked cabinets..........................................................................................................5-56
Table 5-54 CPRI electrical cables (1).................................................................................................................5-58
Table 5-55 CPRI electrical cables (2).................................................................................................................5-59Table 5-56 CPRI electrical cables (3).................................................................................................................5-60
Table 6-1 Ca bles connected between the BTS3900 and the PS4890............................................................. ......6-2
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About This Document
Purposes
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 (referred to as BTS3900 in
this manual)
V300R008&R009
Intended Audience
This document is intended for:
l BTS installers
l Site maintainers
Organization
1 Changes in the BTS3900 GSM Hardware Description
This provides the changes in the BTS3900 GSM Hardware Description.
2 BTS3900 System
The BTS3900 is mainly composed of the BBU3900, RFUs, and indoor macro cabinet. The BBU
and RFUs are installed in the indoor macro cabinet. When the backup power or installation space
is required for customer equipment, the PS4890 can be used together with the BTS3900.
3 BTS3900 Cabinet
BTS3900 GSM
Hardware Description About This Document
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The BTS3900 cabinet has a modular design and houses the BBU, RFUs, DCDU-01, and FAN
unit. The power system is also included in the +24 V cabinet or the 220 V cabinet.
4 BTS3900 Components
This describes the BTS3900 components, which are the BBU, SLPU, DCDU-01, FAN, RFU,GATM, EMU, ELU, power system, and PS4890 components.
5 BTS3900 Cables
This describes the BTS3900 cables. The BTS3900 cables consist of the PGND cable, power
cable, transmission cable, CPRI cable, signal cable, and RF cable.
6 BTS3900 Auxiliary Equipment
This describes the auxiliary equipment of the BTS3900.
ConventionsSymbol Conventions
The symbols that may be found in this document are defined as follows.
Symbol Description
Indicates a hazard with a high level of risk, which 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, which if not
avoided,could result in equipment damage, data loss,
performance degradation, or unexpected results.
Indicates a tip that may help you solve a problem or save
time.
Provides additional information to emphasize or supplement
important points of the main text.
General Conventions
The general conventions that may be found in this document are defined as follows.
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.
Organization
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Convention Description
Courier New Examples of information displayed on the screen are in
Courier New.
Command Conventions
The command conventions that may be found in this document are defined as follows.
Convention Description
Boldface The keywords of a command line are in boldface.
Italic Command arguments are in italics.
[ ] Items (keywords or arguments) in brackets [ ] are optional.
{ x | y | ... } Optional items are grouped in braces and separated by
vertical bars. One item is selected.
[ x | y | ... ] Optional items are grouped in brackets and separated by
vertical bars. One item is selected or no item is selected.
{ x | y | ... }* Optional items are grouped in braces and separated by
vertical bars. A minimum of one item or a maximum of all
items can be selected.
[ x | y | ... ]* Optional items are grouped in brackets and separated by
vertical bars. Several items or no item can be selected.
GUI Conventions
The GUI conventions that may be found in this document are defined as follows.
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.
Keyboard Operations
The keyboard operations that may be found in this document are defined as follows.
Format Description
Key Press the key. For example, press Enter and press Tab.
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Format Description
Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt
+A means the three keys should be pressed concurrently.
Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A meansthe two keys should be pressed in turn.
Mouse Operations
The mouse operations that may be found in this document are defined as follows.
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.
Organization
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1 Changes in the BTS3900 GSM HardwareDescription
This provides the changes in the BTS3900 GSM Hardware Description.
03 (2009-12-30)
This is the second commercial release.
Compared with issue 02 (2009-09-30), the changed parts in this release are as follows:
l The description of vehicle-mounted cabinet is added, refer to 3.2.1 Structure of the
BTS3900 -48 V Cabinet.
l The UTRP is added, refer to UTRP.
02 (2009-09-30)
This is the first commercial release.
Compared with issue 01(2009-07-15), the changed parts in this release are as follows:
l The description of GTMU is changed, refer to GTMU.
l The description of USCU is changed, refer to USCU.
01 (2009-07-15)
This is the draft release.
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2 BTS3900 SystemThe BTS3900 is mainly composed of the BBU3900, RFUs, and indoor macro cabinet. The BBU
and RFUs are installed in the indoor macro cabinet. When the backup power or installation space
is required for customer equipment, the PS4890 can be used together with the BTS3900.
BTS3900
Figure 2-1 shows the BTS3900 system.
Figure 2-1 BTS3900 system
1
2
3
4
5
(1) RFU (2) Indoor macro cabinet (3) FAN unit
(4) BBU (5) DCDU-01 -
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The basic components of the BTS3900 are described as follows:
l The BBU, a baseband processing unit, enables interaction between the base station and the
BSC.l The RFU, a Radio Frequency (RF) filtering unit, performs the functions such as modulation
and demodulation between baseband signals and RF signals, data processing, and
combining and division of signals.
l The indoor macro cabinet houses the BBU and RFUs. In addition, the cabinet performs the
functions such as power distribution, heat dissipation, and surge protection.
NOTE
This takes the BTS3900 -48 V cabinet as an example.
BTS3900 Hardware
Figure 2-1 lists the BTS3900 components.
Table 2-1 Component List
Module or Board Optional or Mandatory Maximum Quantity
BBU3900 Mandatory 1
DRFU Optional 6
GRFU Optional 6
DCDU-01 Mandatory 1
FAN unit Mandatory 1
Electronic label unit
(ELU)
Mandatory 1
GATM Optional 1
PSU(DC/DC) Optional 3
Power subrack (+24 V) Optional 1
PMU Optional 1
PSU (AC/DC) Optional 3
Power subrack (220 V) Optional 1
NOTE
l For details on the configuration of the BBU3900, see Board Configuration of the BBU3900.
l The RF module inside a cabinet that is carried by a car is configured with only the GRFU.
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3 BTS3900 CabinetAbout This Chapter
The BTS3900 cabinet has a modular design and houses the BBU, RFUs, DCDU-01, and FAN
unit. The power system is also included in the +24 V cabinet or the 220 V cabinet.
3.1 Structure of the BTS3900 Cabinet
The BTS3900 cabinet is designed in compliance with the IEC297 standard. It is a vertical cabinet.
3.2 Hardware Structure of the BTS3900
According to different input power supplies, the BTS3900 cabinets can be classified into -48 V
cabinet, +24 V cabinet, and +220 V cabinet. The hardware structure of the cabinet varies with
power distribution.
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3.1 Structure of the BTS3900 Cabinet
The BTS3900 cabinet is designed in compliance with the IEC297 standard. It is a vertical cabinet.
Figure 3-1 shows the BTS3900 cabinet.
Figure 3-1 BTS3900 cabinet
3.2 Hardware Structure of the BTS3900
According to different input power supplies, the BTS3900 cabinets can be classified into -48 V
cabinet, +24 V cabinet, and +220 V cabinet. The hardware structure of the cabinet varies with
power distribution.
3.2.1 Structure of the BTS3900 -48 V Cabinet
The BTS3900 -48 V cabinet uses the external -48 V DC input. 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, stacked on another BTS3900 -48 V cabinet,
or installed side by side with another BTS3900 -48 V cabinet.
3.2.2 Structure of the BTS3900 +24 V Cabinet
The BTS3900 cabinet (+24 V) uses the external +24 V DC input. The PSUs (DC/DC) convert
the external input power into -48 V DC power and supply the -48 V DC power to the DCDU-01.
Then, 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 side-by-side with another BTS3900 +24 V
cabinet.
3.2.3 Structure of the BTS3900 220 V Cabinet
The BTS3900 cabinet (220 V) uses the external 220 V AC input. The PSUs (AC/DC) convert
the external input power into -48 V DC power and supply the -48 V DC power to the DCDU-01.
Then, 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 side-by-side with another BTS3900 cabinet(220 V).
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3.2.1 Structure of the BTS3900 -48 V Cabinet
The BTS3900 -48 V cabinet uses the external -48 V DC input. 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, stacked on another BTS3900 -48 V cabinet,or installed side by side with another BTS3900 -48 V cabinet.
The BTS3900 cabinet -48 V consists of the following components: the RFU, BBU, GATM,
DCDU-01, and FAN unit, among which the GATM is optional.
Single Cabinet Installation
Figure 3-2 shows the typical configuration of the cabinet in single cabinet installation.
Figure 3-2 Typical configuration of the BTS3900 -48 V cabinet in single cabinet installation
Double Cabinet Installation
Figure 3-3 shows the typical configurations of the cabinets in double cabinet installation.
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Figure 3-3 Typical configuration of two BTS3900 -48 V cabinets in side-by-side installation
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Figure 3-4 Typical configuration of two BTS3900 -48 V cabinets in stack installation
NOTE
l When two BTS3900 -48 V cabinets are stacked, the BBU is installed only in the lower cabinet and
serves as the baseband control unit for the two cabinets.
l The subordinate circuit breaker of the -48 V DC input should be of 80 A.
Structure of the Vehicle-mounted Cabinet
A vehicle-mounted cabinet supports only an input of -48 V DC. There is a redundant space of
3U. Figure 3-5 shows the typical configuration of the Structure of the vehicle-mounted cabinet.
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Figure 3-5 Typical configuration of the Structure of the vehicle-mounted cabinet
3.2.2 Structure of the BTS3900 +24 V Cabinet
The BTS3900 cabinet (+24 V) uses the external +24 V DC input. The PSUs (DC/DC) convert
the external input power into -48 V DC power and supply the -48 V DC power to the DCDU-01.
Then, 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 side-by-side with another BTS3900 +24 V
cabinet.
The BTS3900 +24 V cabinet consists of the following components: the RFUs, BBU, DCDU-01,
PSUs (DC/DC), and FAN unit.
Typical Configuration of the Cabinet in Single Cabinet Installation
Figure 3-6 shows the typical configuration of the cabinet in single cabinet installation.
Figure 3-6 Typical configuration of the BTS3900 +24 V cabinet in single cabinet installation
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Typical Configuration of the Cabinets in Double Cabinet Installation
Figure 3-7 shows the typical configuration of two cabinets in side-by-side installation.
Figure 3-7 Typical configuration of the BTS3900 +24 V cabinet in double cabinet installation
3.2.3 Structure of the BTS3900 220 V CabinetThe BTS3900 cabinet (220 V) uses the external 220 V AC input. The PSUs (AC/DC) convert
the external input power into -48 V DC power and supply the -48 V DC power to the DCDU-01.
Then, 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 side-by-side with another BTS3900 cabinet
(220 V).
The BTS3900 220 V cabinet consists of the following components: the RFUs, BBU, DCDU-01,
PMU, PSUs (AC/DC), and FAN unit.
Typical Configuration of the Cabinet in Single Cabinet Installation
Figure 3-8 shows the typical configuration of the cabinet in single cabinet installation.
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Figure 3-8 Typical configuration of the BTS3900 220 V cabinets in single cabinet installation
R
F
U
R
F
U
R
F
U
R
F
U
R
F
U
R
F
U
Typical Configuration of the Cabinets in Double Cabinet Installation
Figure 3-9 shows the typical configuration of two cabinets in side-by-side installation.
Figure 3-9 Typical configuration of the BTS3900 220 V cabinets in double cabinet installation
R
F
U
R
F
U
R
F
U
R
F
U
R
F
U
R
F
U
R
F
U
R
F
U
R
F
U
R
F
U
R
F
U
R
F
U
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4 BTS3900 ComponentsAbout This Chapter
This describes the BTS3900 components, which are the BBU, SLPU, DCDU-01, FAN, RFU,
GATM, EMU, ELU, power system, and PS4890 components.
4.1 BBU3900 Equipment
The BBU3900 is used f or baseband processing and enables interaction between the BTS and
the BSC.
4.2 DCDU-01
The Direct Current Distribution Unit-01 (DCDU-01) supplies DC power to each component in
the cabinet. The height of the DCDU-01 is 1 U.
4.3 Fan Box
One fan box has four fans, and dissipates the heat in the cabinet.
4.4 DRFU
One Double Radio Frequency Unit (DRFU) handles two carriers.
4.5 GRFU
This describes the GSM Radio Frequency Unit (GRFU). The GRFU is designed on the basis of
multi-transceiver technology.
4.6 GATM
The GSM Antenna and TMA control Module (GATM) controls the antenna and TMA.
4.7 ELU
The Electronic Label Unit (ELU) reports the cabinet type information to the FAN unit.
4.8 SLPU
The signal lightning protection unit (SLPU), which can be optionally configured with the UFLP,
UELP, or USLP2, provides the signal surge protection.
4.9 DC/DC Power System
The DC/DC power system converts +24 V DC power into -48 V DC power.
4.10 AC/DC Power System
The AC/DC power system converts 220 V AC power into -48 V DC power.
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4.1 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 Provides physical ports for the communication between the BTS and the BSC
l Provides CPRI ports for the communication with the RF modules
l Provides USB ports for downloading the BTS software
l Provides the OM channel for connection with the webLMT or the M2000
l Processes uplink and downlink data
l Provides centralized management system on the entire DBS system, such as OM and signal
processing
l Provides the reference clock for the system
4.1.1 Structure of the BBU3900
The BBU3900, which features a case structure, is 19 inches wide and 2 U high.
4.1.2 Boards and Module of the BBU3900
This describes the boards and module of the BBU3900 in terms of their functions, ports, LEDs,
and DIP switches.
4.1.1 Structure of the BBU3900
The BBU3900, which features a case structure, is 19 inches wide and 2 U high.
The dimensions of the BBU3900 are 442 mm (width) x 310 mm (depth) x 86 mm (height).
Figure 4-1 shows the BBU3900.
Figure 4-1 BBU3900
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4.1.2 Boards and Module of the BBU3900
This describes the boards and module of the BBU3900 in terms of their functions, ports, LEDs,
and DIP switches.
Board Configuration of the BBU3900
This describes the board configuration principles of the BBU3900.
Slots of the BBU3900
Figure 4-2 shows the slots of the BBU3900.
Figure 4-2 Slots of the BBU3900
Board Configuration of the BBU3900
Table 4-1 describes the board configuration principles of the BBU3900.
Table 4-1 Board configuration principles of the BBU3900
Board Optional/ Mandatory
MaximumNumber
Slot Restriction
GTMU Mandatory 1 slot 5 or slot 6 Can be installed
only in the slot 6
(inhabited in
Slot5 and
Slot6).
FAN Mandatory 1 FAN Can be installed
only in the FAN
slot.
UPEU Mandatory 2 PWR1 and
PWR2
When a single
UPEU is
configured, it is
preferentially
installed in the
PWR2 slot.
UEIU Optional 1 PWR1 -
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Board Optional/ Mandatory
MaximumNumber
Slot Restriction
UTRP Optional 1 slot 0 or slot 4 Preferentially
installed in the
slot 4.
USCU Optional 1 slot 1 -
Figure 4-3 shows the typical configuration of the BBU3900.
Figure 4-3 Typical configuration of the BBU3900
GTMU UPEUFAN
GTMU
ETH FE0 FE1
CPRI0 CPRI2 CPRI4
CPRI3CPRI1 CPRI5TX RX
TX0 RX0 TX1 RX1 TX2 RX2 TX3 RX3TX4 RX4 TX5 RX5LIU0LIU2
LIU1LIU3
USBTST E1/T1 RST
RUN
ALM
ACT
1 2 3 4 5
GTMU
The GSM Transmission & Timing & Management Unit for BBU (GTMU) is the basic
transmission and control function entity of the BBU. It provides the reference clock, maintenance
port, and external alarm collection port, monitors the power supply, and controls and manages
the entire base station.
Panel
The GTMU is classified into two types: GTMU and GTMUb. Figure 4-4 and Figure 4-5 show
the panels of the GTMU and GTMUb.
Figure 4-4 GTMU panel
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Figure 4-5 GTMUb panel
NOTE
The GTMU hereinafter mentioned in this document is the first type.
Functions
The GTMU has the following functions:
l The GTMU controls and manages the base station.
l The GTMU supports fault management system, configuration management system,
performance management system, and security management system.
l The GTMU monitors the fans and power modules.
l The GTMU provides and manages the clock source of the base station in centralized mode.
l The GTMU provides the clock output for test.
l The GTMU provides the FE port for maintenance on the OM system.
l The GTMU supports transmission through four E1s and two FEs.
l The GTMU provides CPRI ports for communication between the BBU and the RFUs.
l The GTMUb supports interconnected BBUs.
l Four IDX2 ports on the backplane of the GTMUb can achieve the function of baseband
resource pool backup.
LEDs
Table 4-2 describes the LEDs on the GTMU.
Table 4-2 LEDs on the GTMU
LED Color Status Description
RUN Green ON The board is faulty.
OFF There is no power supply, or the
board is faulty.
ON for 1s and OFF
for 1s
The board is running properly.
ON for 2s and OFF
for 2s
The board is being tested.
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LED Color Status Description
ON for 0.125s and
OFF for 0.125s
Software is being loaded to the
board.
ALM Red ON An alarm is generated,indicating a running fault.
OFF The board is running properly.
ACT Green ON The board is in the active state.
OFF The board is in the standby state.
LIU0 to LIU3 Green ON The link is in the idle state.
ON for 0.125s and
OFF for 0.125s
An E1/T1 remote alarm is
generated.
OFF The link is functional.
CPRI0 to
CPRI5
Green ON The CPRI link is functional.
Red ON The optical module fails to
receive signals.
ETH Green (LINK
LED on the left)
ON The connection is set up
successfully.
OFF No connection is set up.
Orange (Activity
LED on the right)
Blinking Data is being transmitted.
OFF No data is being transmitted.
M_S
(GTMUb)
- - This is the LED of the reserved
port.
EXT
(GTMUb)
- - This is the LED of the reserved
port.
Ports
Table 4-3 describes the ports on the GTMU.
Table 4-3 Ports on the GTMU
Label Connector Description
CPRI0 to CPRI5 SFP connector Data transmission port interconnected to the RFU.
It supports the input and output of optical and
electrical transmission signals.
EXT (GTMUb) SFP connector Group combined port. It supports the input and
output of optical and electrical transmission
signals.
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Label Connector Description
ETH RJ-45 connector Local maintenance and debugging port
FE0 RJ-45 connector Connected to the routers in the equipment room
through FE cables to transmit network information
FE1 DLC connector Connected to the routers in the equipment room
through optical cables to transmit network
information
USB USB connector Used for automatic software upgrade through the
USB disk
TST USB connector Provides a reference clock for the tester
E1/T1 DB26 female
connector
Used for four E1/T1 inputs and outputs between
the GTMU and the UELP or between BSCs
The RST button on the panel of the GTMU is used for resetting the board.
DIP Switches
On the GTMU, there are five DIP switches, each of which has four bits. DIP switches S1 and
S2 need to be set jointly. The functions of the five DIP switches are as follows:
l S1 is used to select the E1 resistance. Table 4-4 provides details on the DIP switch.
l S2 is used to select the grounding mode of E1/T1 cables. Table 4-5 provides details on the
DIP switch.
l S3 is reserved.
l S4 is used to select the E1 bypass. Table 4-6 provides details on the DIP switch.
l S5 is used for timeslot settings when the E1 bypass is selected. Table 4-7 provides details
on the DIP switch.
Table 4-4 Details of the DIP Switch S1
DIP
Switch
Bit Status Description
1 2 3 4
S1 ON ON OFF OFF The E1 resistance is set to
75 ohm.
OFF ON OFF OFF The E1 resistance is set to
120 ohm.
ON OFF OFF OFF The T1 resistance is set to
100 ohm.
Others Unavailable
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NOTE
Bits 3 and 4 of S1 should be kept the out-of-factory state, without any manual setting on site. The out-of-
factory state should be OFF. If the bits are ON, set them to OFF.
Table 4-5 Details of the DIP Switch S2
DIPSwitch
Bit Status Description
1 2 3 4
S2 OFF OFF OFF OFF By default, all the DIP
bits of S2 are set to OFF
in all the modes .
ON ON ON ON When the four E1 RX
links in 75 ohm have
errors, all the bits of S2
must be set to ON to
rectify the faults on the
E1 links.
Others Unavailable
Table 4-6 Details of the DIP Switch S4
DIPSwitch
Bit Status Description
1 2 3 4
S4 ON ON ON ON Supporting E1 bypass
OFF OFF OFF OFF Not supporting E1
bypass
Others Unavailable
Table 4-7 Details of the DIP Switch S5
DIPSwitch
Bit Status Description
1 2 3 4
S5 ON ON ON ON Not supporting E1
bypass
OFF ON ON OFF Supporting E1 bypass
of level-1 cascaded
base stations
ON OFF ON OFF Supporting E1 bypass
of level-2 cascaded
base stations
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DIPSwitch
Bit Status Description
1 2 3 4
OFF OFF ON OFF Supporting E1 bypass
of level-3 cascaded base stations
ON ON OFF OFF Supporting E1 bypass
of level-4 cascaded
base stations
OFF ON OFF OFF Supporting E1 bypass
of level-5 cascaded
base stations
NOTE
The E1 bypass function is not supported in this version. All the bits of S4 should be set to OFF, and all the
bits of S5 should be set to ON.
UPEU
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
(UPEUA) and the Universal Power and Environment Interface Unit Type B (UPEUB). The
UPEUA converts -48 V DC to +12 V DC and the UPEUB converts +24 V DC to +12 V DC.
Figure 4-6 shows the UPEUA panel and Figure 4-7 shows the UPEUB panel.
Figure 4-6 Panel of the UPEUA
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Figure 4-7 Panel of the UPEUB
Functions
The UPEU has the following functions:
l Convert -48 V or +24 V DC to +12 V DC that is applicable to the boards
l Provides four ports with two ports transmitting two RS485 inputs and the other two ports
transmitting eight boolean signals
l Provides reverse connection protection for power cable connectors
LED
The UPEU has one LED, indicating the running status of the board. Table 4-8 describes the
LED and its status.
Table 4-8 LEDs on the UPEU and its status
Label Color Status Description
RUN Green ON The UPEU is
operational.
OFF Input power is
unavailable or the
board is faulty.
Ports
The UPEU has four ports with two ports transmitting two RS485 inputs and the other two ports
transmitting eight boolean signals. When configured in different slots, the ports on the UPEU
have different functions. Figure 4-8 shows the slots in the BBU.
Figure 4-8 Slots in the BBU
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Table 4-9 describes the ports on the panel of the UPEU.
Table 4-9 Description on the ports on the panel of the UPEU
Slot Label Connector
Quantity Description
PWR2 PWR 3V3 1 Introducing +24 V DC or -48 V DC
power
EXT-
ALM0
RJ-45 1 No.8 to 11 Boolean signal input ports
EXT-
ALM1
RJ-45 1 No.12 to 15 Boolean signal input ports
MON0 RJ-45 1 No.0 RS485 signal input port
MON1 RJ-45 1 No.1 RS485 signal input port
PWR1 PWR 3V3 1 Introducing +24 V DC or -48 V DC
power
EXT-
ALM0
RJ-45 1 No.0 to 3 Boolean signal input ports
EXT-
ALM1
RJ-45 1 No.4 to 7 Boolean signal input ports
MON0 RJ-45 1 No.0 RS485 signal input port
MON1 RJ-45 1 No.1 RS485 signal input port
UEIU
This describes the Universal Environment Interface Unit (UEIU) of the BBU3900. The UEIU
transmits monitoring and alarm signals from the external devices to the main control and
transmission unit.
PanelFigure 4-9 shows the panel of the UEIU.
Figure 4-9 Panel of the UEIU
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Functions
The UEIU has the following functions:
l Provides two ports with each transmitting one RS485 signal.
l Provides two ports with each transmitting four boolean signals.
l Transmits monitoring signals and alarm signals from external devices to the main control
and transmission unit.
Ports
The UEIU is configured in slot PWR1. It provides four ports with two ports transmitting two
RS485 inputs and the other two ports transmitting eight boolean signals.
Table 4-10 describes the ports on the panel of the UEIU.
Table 4-10 Ports on the panel of the UEIU
Slot Label Connector
Quantity
Description
PWR1 EXT-
ALM0
RJ-45 1 No.0 to 3 Boolean signal input ports
EXT-
ALM1
RJ-45 1 No.4 to 7 Boolean signal input ports
MON0 RJ-45 1 No.0 RS485 signal input port
MON1 RJ-45 1 No.1 RS485 signal input port
FAN
The FAN is the fan unit of the BBU3900. The FAN controls the fan speed, detects the temperature
of the fan board, and dissipates the heat in the BBU.
Panel
Figure 4-10 shows the panel of the FAN.
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Figure 4-10 Panel of the FAN
Functions
The FAN has the following functions:
l Controls the fan speed.
l
Reports the fan status to the main control board.l Detects the temperature of the air inlets.
l Dissipates the heat.
LED
The FAN has one LED, indicating the running status of the module. Table 4-11 describes the
LED and its status.
Table 4-11 LED on the FAN and its status
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.
Red OFF No alarm is reported.
1s ON, 1s OFF The module is
reporting alarms.
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USCU
This describes the Universal Satellite card and Clock Unit (USCU).
PanelThe USCU has two types of panels, that is, the 0.5 U and 1 U panels, as shown in Figure 4-11
and Figure 4-12 respectively.
Figure 4-11 Panels of the USCU (0.5 U)
Figure 4-12 Panels of the USCU (1 U)
(1) GPS port (2) RGPS port (3) TOD port (4) M-1PPS port (5) BITS port
Functions
The USCU has the following functions:
l Provides the synchronization clock information of the base station for the main control
board
l Provides synchronization time information for the lower-level BBU to achieve the BBU
clock cascading
LEDs
Table 4-12 and Table 4-13 describe the LEDs on the USCU.
Table 4-12 LEDs on the USCU
LED Color Status Description
RUN Green ON There is power supply, but the
board is faulty.
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LED Color Status Description
OFF There is no power supply, or the
board is faulty.
Blinking (ON for 1sand OFF for 1s)
The board is running properly.
ON for 0.125s and
OFF for 0.125s
Software is being loaded to the
board, or the board is not
configured.
ALM Red OFF The board is running properly,
and no alarm is generated.
ON An alarm is generated, and the
board needs to be replaced.
Blinking (ON for 1sand OFF for 1s)
An alarm is generated. Thealarm may be caused by the
faults of the related boards or
ports. Therefore, whether the
board needs to be replaced
cannot be decided.
ACT Green ON The serial port for
communication between the
USCU and the main control
board is enabled.
OFF The serial port for communication between the
USCU and the main control
board is disabled.
Table 4-13 LEDs on the TOD port
Color Description Default
Green ON: The TOD port is
configured as the input port.
The green LED of the TOD0 port is OFF,
and the