Internal
WCDMA BTS3900 Hardware Structure
BTS3900V200R010 WRAN Training Team
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As an important part of UTRAN,
NodeB mainly processes the signals of physical layer of Uu interface BTS3900 is a new generation indoor
marco NodeB which is produced by Huawei Co. Ltd.
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Upon completion of this course, you will be able to: Master the hardware structure of BTS3900
Master the working principle of different subsystems and boards of BTS3900 Master the cables connection rules of BTS3900
Know typical configurations of BTS3900
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《BTS3900 Product Description》 《BTS3900 Hardware Description》
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Chapter 1 NodeB Overview Chapter 2 BTS3900 Hardware Structure Chapter 3 BTS3900 Typical Configuration
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Abbreviations WMPT
WCDMA Main Processing and Transmission Unit
WBBPa
WCDMA Baseband Process unit Type A
WRFU
WCDMA Radio Filter Unit
UBFA
Universal BBU Fan Unit Type A
UEIU
Universal Environment Interface unit
UELP
Universal E1/T1 Lighting Protection unit
UFLP
Universal FE/GE Lighting Protection unit
UPEU
Universal Power and Environment Interface Unit
UAEU
Universal ATM over E1/T1 Interface and Processing Unit
UIEU
Universal IP Packet over E1/T1 Interface and Processing Unit
UTRP
Universal Transmission Processing Unit
DCDU-01
Direct Current Distribution Unit-01
CPRI
Common Protocol Radio Interface
PSU
The power supply unit
PMU
The power and environment monitoring unit
APM
Advanced Power Module
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NodeB Position in UMTS Network UTRAN
UE Uu
CN Iu Iu-CS
RNC Iub Iu-BC
CS
NodeB Iu-PS
Iur PS
NodeB
Iu-BC
Iub
NodeB
RNC CBC
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NodeB System Architecture Clock synchronization source Uu
UE
Antenna & feeder subsystem
GPS antenna & feeder system
Internal Clock RNC
Iub
BTS3900 cabinet DDF
power supply system
Transmission device
Environment Monitoring device O&M terminal
BTS3900 System
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Chapter 1 NodeB Overview Chapter 2 BTS3900 Hardware Structure Chapter 3 BTS3900 Typical Configuration
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Chapter 2 BTS3900 Hardware Structure Section 1 BTS3900 Introduction Section 2 BBU Modules Structure
Section 3 RF Modules Structure Section 4 Power Modules Structure Section 5 BTS3900 Cables
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BTS3900 Appearance
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Type
Parameters
Dimensions
600(W)*900(H)*450(D)
Empty cabinet
≤ 70kg
Weight under full configuration
≤ 160Kg
3*1 and 3*2 Weight
≤ 120Kg
- 48V : Input range of voltage
-38.4V DC to -57V DC
+24V: Input range of voltage
+21.6 V DC to +29 V DC
200 V AC to 240 V AC
200 V AC to 240 V AC 176 V AC to 290 V AC, single-phase
200 V AC/346 V AC to 240 V AC/415V AC
176 V AC/304 V AC to 290 V AC/500 V AC, three-phase
Working Temperature
-20℃~+50℃
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BTS3900 Single Cabinet Full Configuration Structure 1U
9U
19U 2U 1U
1U 2U 1U 2U
- 48VDC Single Cabinet HUAWEI TECHNOLOGIES CO., LTD.
220V AC Single Cabinet
+ 24VDC Single Cabinet All rights reserved
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BTS3900 Stacked Cabinets Full Configuration Structure
3U
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BTS3900 Capacity and Characteristics System capacity specifications:
BTS3900 can support up to: uplink 1536 CEs and downlink 1536 CEs
BTS3900 can support up to: 3*8 cells or 6*4 cells Characteristics
Transmission Type: E1/T1, FE (electrical port ), FE (optical port ),
Networking mode: star, chain, tree, ring and hybrid Synchronization clock sources: Iub interface clock, GPS, and internal clock Handover types: softer handover, soft handover and hard handover Services: CS services, PS services , mixed services and position services Enhanced functions:RET , HSDPA , HSUPA phase II
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BTS3900 Logical Structure -48V
+24V/220V
Power Module
PSU
DCDU
WRFU Iub
BBU
RNC
WRFU
Baseband Transmission Control module
Signal
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RF Module
Current
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Antenna
Chapter 2 BTS3900 Hardware Structure Section 1 BTS3900 Introduction Section 2 BBU Modules Structure
Section 3 RF Modules Structure Section 4 Power Modules Structure Section 5 BTS3900 Cables
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Logical Structure of the BBU3900 Module OMC
External Subsystem
Control Subsystem
Clock mode
Operation& Maintenance
Signaling Processing
Decoding Transmission Adaptation Protocol Processing
FP Processing
RNC
E1/T1 FE Transport Interface
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Demodulation Power Control information
Codling
Transport Subsystem
Power mode
Modulation
Baseband Subsystem
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Interface CPRI TO WRFU Module
BBU3900 Module Introduction Full configuration
Typical configuration
Mandatory boards and modules:WMPT, WBBP, UBFA, and UPEU
The optional boards are the UELP, UFLP, UTRP, and UEIU.
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BBU3900 Module Introduction Slot
SLOT0
SLOT4
16
SLOT1
SLOT5
SLOT2
SLOT6
SLOT3
SLOT7
Slot 18
Slot 19
B
WBBP
UTRP
PEU/
F
WBBP
UTRP
EIU
A
WBBP
WMPT
PEU/
WBBP
WMPT
EIU
Active and standby slot definition only for UTRP board
Board
Slot 0
Slot 1
Slot 2
Slot boards definition
Slot 3
Slot 4
Slot 5
WMPT UTRP
available
available
available
available
available
available
WBBP
available
available
available
available
available
available
UELP
available
available
UFLP
available
available
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Slot 6
Slot 7
available
available
BBU Module --- WMPT Board IP transmission on Electrical Port :RJ45
Loading
Testing:USB
GPS antenna: SMA
LEDs Commissioning:RJ45
Board number:
IP transmission Optical signals: SFP
4E1:DB26
Main Functions:
maximum is 2 for one BBU
Providing OM functions
mandatory board
Controlling other boards in the system and
working in active and standby
providing the reference clock Providing USB ports for automatic NodeB upgraded Providing transmission port for Iub interface
Providing OM channels HUAWEI TECHNOLOGIES CO., LTD.
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BBU Module --- WMPT Board LEDs of running status of WMPT:
Label
Color
Status
Description
RUN
Green
ON
The board has power input, yet the board is faulty.
OFF
The board has no power input.
1s ON, 1s OFF
The board is running as configured.
0.125s ON, 0.125s OFF
The software is being loaded to the board, or the board is not in use.
ON
The board is reporting hardware alarms.
OFF
The board is running properly.
ON
The board is in active mode.
OFF
The board is in standby mode.
ALM
ACT
Red
Green
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BBU Module --- WMPT Board
LED
Color
Status
Description
LEDs beside the FE1 and FE0 optical port
Green
ON
The connections are functional.
OFF
The connections are faulty.
Blinking
There is ongoing data transmission.
OFF
There is no data transmission.
ON
The connections are functional.
OFF
The connections are faulty.
Blinking
There is ongoing data transmission.
OFF
There is no data transmission.
Yellow
LEDs beside the ETH port
Green Yellow
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BBU Module --- WMPT Board Two DIP Switches :
SW1 for setting the E1/T1 working mode SW2 for setting the protection ground for the E1. Settings of SW1 Bit
T1 Mode
120-ohm E1 Balanced Mode
75-ohm E1 Unbalanced Mode
1
ON
OFF
ON
2
ON
OFF
ON
3
OFF
ON
ON
4
OFF
ON
ON
Settings of SW2 Bit
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120-ohm E1 Balanced Mode
75-ohm E1 Unbalance d Mode
1
OFF
ON
2
OFF
ON
3
OFF
ON
4
OFF
ON
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Description
The RRING is for connected to the protection ground
BBU Module --- WBBPa Board CPRI 0~2 (1.25G-2.5G): SFP
LEDs
Board number: mandatory board, maximum is 6 Main Functions:
Providing the CPRI interface for communication between the BBU and the WRRU or WRFU Processing uplink and downlink baseband signals and support HSUPA and HSDPA function
Supporting 1+1 backup of the CPRI interface According to the board chip processing capability, WBBP module include seven specifications. Current WBBP is the A version, called WBBPa. HUAWEI TECHNOLOGIES CO., LTD.
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BBU Module --- WBBPa Board LED of running status of board : Label
Color
Status
Description
RUN
Green
ON
The board has power input, yet the board is faulty.
OFF
The board has no power input or is faulty.
1s ON, 1s OFF
The board is running properly.
0.125s ON/OFF
Software is being loaded to the board.
ON
The board is running properly.
OFF
The board is not in use.
OFF
The board is running properly.
ON
The board has alarms on hardware and it should be replaced with a new one.
OFF
normal
ON
The CPRI links over the optical cable are faulty.
Blinking at 2 Hz
The RRU on the CPRI link is faulty in hardware.
Blinking at 0.5 Hz
The RRU on the CPRI link is faulty in the antenna system connection.
ACT
ALM
CPRI0 CPRI1 CPRI2
Green
Red
Red Green
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BBU Module --- WBBP Board There are 2 kinds of Baseband card, WBBPa and WBBPb. The WBBPa support HSDPA (2 ms TTI) and support for HSUPA phase I (10 ms TTI). The WBBPb support HSDPA (2 ms TTI), and support for HSUPA phase II (2 ms TTI).
Board
Uplink R99
Downlink
HSDPA
HSUPA
Type
Cell
/HSUPA CE
R99 CE
HSDPA Capacity
throughput
throughput
WBBPa
3 cells
128
256
45 HS-PDSCH codes
15Mbps
6Mbps
WBBPb1
3 cells
64
64
45 HS-PDSCH codes
15Mbps
6Mbps
WBBPb2
3 cells
128
128
45 HS-PDSCH codes
15Mbps
6Mbps
WBBPb3
6 cells
256
256
90 HS-PDSCH codes
30Mbps
12Mbps
WBBPb4
6 cells
384
384
90 HS-PDSCH codes
30Mbps
12Mbps
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BBU Module --- UBFA Board
Board number: mandatory board, maximum is 1 Main Functions:
Controlling the fan speed Reporting the fan status to the WMPT
Detecting the temperature of the fan board Label
Color
Status
Description
STATE
Green
0.125s ON,
The module is not registered, and no
0.125s OFF
alarm is reported.
1s ON, 1s OFF
The board is running properly.
ON
The module is reporting alarms.
Red
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BBU Module --- UPEU Board Panel of the UPEA
Panel of the UPEB
+24V to +12V
-48V to +12V
Board number: mandatory, maximum is 2, 1+1 backup Main Functions:
Converting -48 V or +24 V DC power input to +12 V DC power that is supported by boards Reporting alarms related to input and output under voltage
Providing transmission ports for RS485 signals and 8 dry contact alarm signals HUAWEI TECHNOLOGIES CO., LTD.
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BBU Module --- UPEU Board LED: The UPEU has one LED, indicating the running status of the board.
Label
Color
Status
Description
RUN
Green
ON
The board is running properly.
OFF
The board has no power input, or the board is faulty.
Socket and Port: The UPEU has one socket and four ports.
Label
Quantity
Connector Type
Function
PWR
1
3V3
DC power input
EXT-ALM1
1
RJ45
Transmitting dry contact alarm signals
EXT-ALM0
1
RJ45
MON1
1
RJ45
MON0
1
RJ45
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Transmitting RS485 environment monitoring signals
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BBU Module --- UTRP Board
The UTRP provides ports for eight E1s/T1s and implements transport such as IP and ATM between the BBU3900 and the RNC. 4 E1:DB26
Label
Color
Status
Description
RUN
Green
ON
The board has power input, yet the board is faulty.
OFF
The board has no power input or is faulty.
1s ON, 1s OFF
The board is running properly.
0.125s ON, 0.125s OFF
Software is being loaded to the board.
2s ON, 2s OFF
The board is under test.
ON
The board is in active mode.
OFF
The board is in standby mode.
OFF
The board is running properly.
ON
The board is reporting alarms and is faulty.
ACT
ALM
Green
Red
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BBU Module --- UTRP Board Type WCDMA UTRP extend transmission board
UTRP board should add sub board to provide the different interface type. WD22UTRP is the main board name. The UTRP has three sub-boards in current version − UAEU: Eight ATM over E1s/T1s − UIEU: Eight IP over E1s/T1s − UUAS: One unchannelized ATM over SDH/SONET(STM-1/OC-3) interface The board in gray table is not be delivered currently. Transmission Sub board Interface type Board name name
Interface specification
WD22UEEU
WD22UEEC
FE/GE electrical board
2*FE/GE (10/100/1000M adaptive)
WD22UEOU
WD22UEOC
FE/GE optical board
2*FE/GE (10/100/1000M configurated)
WD22UAEU
WD22UAEC
E1/T1 ATM interface sub board
8* E1/T1
WD22UIEU
WD22UPEC
E1/T1 IP interface sub board
8*E1/T1
WD22UCPU
WD22UCPS
Channelization IP optical sub board
1*STM-1
WD22UUPU
WD22UUPS
Unchanneliazation IP optical sub board
1*STM-1
WD22UCAU
WD22UCAS
Channelization ATM optical sub board
1*STM-1
WD22UUAU
WD22UUAS
Unchanneliazation ATM optical sub board
1*STM-1
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BBU Module --- UEIU Board Board number: maximum is 1 The UEIU Functions:
Connecting to an external monitoring device and transmitting RS485 signals to the WMPT
Connecting to an external alarm device and transmitting dry contact alarm signals to the WMPT Port : The UEIU has four ports.
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Label
Connector Type
MON0
RJ45
MON1
RJ45
EXT-ALM0
RJ45
EXT-ALM1
RJ45
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BBU Module --- SLPU Board UFLP The auxiliary devices of the
UELP
BBU3900. The devices are
the SLPU, UELP, and UFLP SLPU: The signal lightning
protection unit is an optional module of the BTS3900 cabinet (-48 V) or the power distribution cabinet. The UFLP and the UELP
are optional units that are installed in the SLPU.
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BBU Module --- UELP Board UELP: The universal E1/T1 lightning protection (UELP) unit is a universal E1/T1
The UELP can be optionally installed in the SLPU or the BBU. Each UELP supports the surge protection of 4-way E1/T1 signals.
DB26
DB25
E1 Connection: E1 E1
Indoor DDF
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BBU Module --- UELP Board DIP Switch: The UELP has one DIP switch, which is used to select whether the
receive terminal is grounded. The DIP switch has four bits.
DIP Switch S1
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DIP Status
Description
1
2
3
4
ON
ON
ON
ON
Used for the 75 Ω unbalanced mode
OFF
OFF
OFF
OFF
Used for other modes except the 75 Ω unbalanced mode
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BBU Module --- UFLP Board UFLP: The universal FE lightning protection (UFLP) board is optionally installed in the
SLPU or BBU. Each UFLP supports 2-way FE surge protection.
IP Cable Connection. Transmission Equipment LAN switch or Router
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Chapter 2 BTS3900 Hardware Structure Section 1 BTS3900 Introduction Section 2 BBU Modules Structure
Section 3 RF Modules Structure Section 4 Power Modules Structure Section 5 BTS3900 Cables
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RF Module --- WRFU Board
The WRFU consists of the high-speed interface unit, signal processing unit, power amplifier, and duplex unit
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RF Module --- WRFU Board Type
Label
Connector Type
Description
Port for transceiving RF signals
ANT-RXB
DID connector
Connecting the antenna subsystem
ANT-TX/RXA
DID connector
CPRI
CPRI0
SFP female connector
Connecting the BBU, or the upper-level WRFU during the cascading
CPRI1
SFP female connector
Connecting the lowerlevel WRFU during the cascading
RX-INB
QMA female connector
Input port of diversity signals in the antenna channel
RX-OUTA
QMA female connector
Output port of diversity signals in the antenna channel
Power port
PWR
3V3 power connector
Introducing power
Commissioning port
MON
RJ45 connector
Used for commissioning
Interconnection port for RF receive signals
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RF Module --- WRFU Board Identifier
Status
Meaning
RUN
On
The power input is normal, but the module is faulty.
Off
There is no power input, or the module is faulty.
On for 1 second and off for 1 second
The module is functional.
On for 0.125 second and off for 0.125 second
The module is loading software or is not started.
On
The module is in the alarm status.
Off
No alarm is generated.
On
The module is functional and is connected to the BBU.
Off
The module is not connected to the BBU.
On for 1 second and off for 1 second
The module is in the local test status.
Off (red)
No VSWR alarm is generated.
On (red)
A VSWR alarm is generated.
On (green)
The CPRI link is normal.
On (red)
The interface module fails to receive signals.
Red LED on for 1 second and off for 1 second
The CPRI link is out of lock.
ALM
ACT
VSWR
CPRI0 CPRI1
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RF Module --- WRFU Board RF specifications:
One WRFU supports four carriers Each carrier’s maximum output power of WRFU is 80W The receive sensitivity of single antenna is better than -125.8dBm The receive sensitivity of two antennas is better than -128.6dBm
The maximum searching ability is 200km The maximum access search radius is configurable with the step size of 300 m Configuration Type (No Transmit Diversity)
Transmit Diversity Power (W)/Carrier
Typical Power Consumption (W)
Maximum Power Consumption (W)
3*1
20
520
630
3*2
20
610
830
3*3
20
810
1070
3*4
20
1020
1330
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Chapter 2 BTS3900 Hardware Structure Section 1 BTS3900 Introduction Section 2 BBU Modules Structure
Section 3 RF Modules Structure Section 4 Power Modules Structure Section 5 BTS3900 Cables
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Power Distribution Modes of the BTS3900
- 48 V DC Distribution
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Power Distribution Modes of the BTS3900 +24 V DC Distribution
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Power Distribution Modes of the BTS3900 220 V AC Distribution
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- 48V Cabinet Power Module --- DCDU-01 Board Function
The DCDU-01 supports one -48 V DC power input and ten -48 V DC power outputs The DCDU-01 supplies power to the BBU, WRFU, FAN, and user devices inside cabinets The DCDU-01 has the built-in surge protector, which supports the surge protection capability of the differential mode of 10 kA and the common mode of 15 kA - 48V DC Single Cabinet HUAWEI TECHNOLOGIES CO., LTD.
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- 48V Cabinet Power Module --- DCDU-01 Board Name
Label
Description
Power input
NEG(-)
-48 V NEG input wiring terminal
RTN(+)
-48 V RTN input wiring terminal
SPARE2, SPARE1,
RFU0 to RFU5 supplying power to six WRFUs
BBU, FAN, and RFU5-
BBU supplying power to the BBU
RFU0
FAN supplying power to the FAN
wiring terminal Power output port
SPARE1 and SPARE2 reserved Power switch
SPARE2, SPARE1, BBU, FAN, and RFU5RFU0
RFU0 to RFU5 controlling the ON/OFF of the current of six WRFUs BBU controlling the ON/OFF of the current of the BBU FAN controlling the ON/OFF of the current of the FAN SPARE1 and SPARE2 controlling the ON/OF of the current on the SPARE1 and SPARE2 power output ports
Alarm output port
SPD ALM
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DUDU-01 dry contact alarm output port All rights reserved
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+24V Power Subrack --- PSU (DC/DC) Board Function
Converting +24 V DC power to -48 V DC power and leading the -48 V DC power to the DCDU Monitoring alarms related to module faults ,alarms related to module protection and power out-of-position alarm
(1) Power running LED (2) Protection LED (3) Fault LED
+ 24V DC Single Cabinet HUAWEI TECHNOLOGIES CO., LTD.
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220V AC Power Subrack --- PSU(AC/DC) Board Function
The power subrack consists of the PMU, PSU (AC/DC) and the wiring unit of the power subrack (220 V). The power subrack (AC/DC) converts the 220 V AC power to the -48 V DC power.
(1) Power running LED
(2) Protection LED (3) Fault LED 220V AC Single Cabinet HUAWEI TECHNOLOGIES CO., LTD.
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220V AC Power Subrack --- PSU(AC/DC) Board LED
Color
Status
Meaning
Power running LED
Green
On
Normal
Off
There are faults (such as no AC input, or overvoltage and undervoltage of AC input) on the mains, or the PSU has no output.
Protection LED
Yellow
Off
Normal
On
Temperature pre-alarm or fan pre-alarm
Off
Normal, or the PSU has no output because of faults (such as no AC input, or overvoltage and undervoltage of AC input) on the mains.
On
There is no output because of output overvoltage shutdown, fan fault, overtemperature shutdown, remote shutdown, or internal problems of the PSU.
Fault LED
Red
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220V AC Power Subrack --- PMU Board The power and environment monitoring unit (PMU) is the unit for monitoring the power and the environment. The PMU provides perfect power system management, power distribution detection, and alarm report functions.
(1) LEDs
(2) Power supply test ports
(3) RS232/RS422 port
(4) Battery control switches
(1) Backplane port
(2) DIP switch
(5) COM port HUAWEI TECHNOLOGIES CO., LTD.
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220V AC Power Subrack --- PMU Board Identifier
Color
Status
Meaning
RUN
Green
On for 1 second and
The module is functional, and the communication with the
off for 1 second
main control unit is normal.
On for 0.125 second
The module runs normally but the communication with the
and off for 0.125
main control unit fails.
second
If the PMU does not communicate with the main control unit for one minute, the communication fails. In this situation, the RUN LED blinks four times every second.
ALM
Red
On/Off
The PMU is faulty (not in the power-on self-check state).
On
The following alarms are reported: Mains overvoltage or undervoltage alarm Busbar overvoltage or undervoltage alarm Power module alarm Load shutdown alarm
Off
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No alarm is generated.
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220V AC Power Subrack --- PMU Board Port
Purpose
RS232/RS422 port
Communicating with the main control unit
Battery control
The battery control switch has two control ports ON and OFF, which are
switch
used for powering on and off the battery. Press and hold the port ON for 5s to 10s until the battery is powered on. Press and hold the port OFF for 5s to 10s until the battery is powered off. CAUTION: You need to insert a small round bar into the hole when you operate the battery control switch. When you hear a crack, the battery is powered on or off. To operate the battery control switch on the front panel of the PMU, insert a small round pole into the hole.
Power supply test
Two power supply test holes -48 V and 0 V are available for measuring
port
power voltages through an ordinary multimeter.
COM port
Connecting the external signal transfer board
Backplane port
Connecting the backplane
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220V AC Power Subrack --- PMU Board
DIP Switch: The DIP switch is located on the rear panel of the PMU. The DIP switch has eight bits, which are set to OFF before delivery.
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Bit 3
Bit 2
Bit 1
Bit 0
0
0
0
0
0000
0
0
0
1
0001
0
0
1
0
0010
0
0
1
1
0011
0
1
0
0
0100
0
1
0
1
0101
0
1
1
0
0110
0
1
1
1
0111
1
0
0
0
1000
1
0
0
1
1001
1
0
1
0
1010
1
0
1
1
1011
1
1
0
0
1100
1
1
0
1
1101
1
1
1
0
1110
1
1
1
1
1111
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FAN Unit The FAN unit refers to the fan box. The FAN unit provides the functions of ventilation
and heat dissipation for cabinets. One FAN unit has four independent fans.
Type
Label
Connector Type
Description
Power port
-48 V
3V3 power connector
Introducing the -48 V DC power
Temperature sensor port
SENSOR
RJ45 connector
Connecting the external temperature sensor
Communication port
COM OUT
RJ45 connector
Cascading the lowerlevel FAN module
COM IN
RJ45 connector
Connecting the main control unit
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Chapter 2 BTS3900 Hardware Structure Section 1 BTS3900 Introduction Section 2 BBU Modules Structure
Section 3 RF Modules Structure Section 4 Power Modules Structure Section 5 BTS3900 Cables
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BBU3900 Cable Connection
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Cables --- PGND Cable PGND Cable
OT terminal
Name
Color
Cross-Sectional Area
PGND cable of the BTS3900 WCDMA cabinet
Green and yellow
The cross-sectional area of a wire is 25 mm2.
PGND cable of the DCDU
Green and yellow
The cross-sectional area of a wire is 6 mm2.
PGND cable for the SLPU
Green and yellow
The cross-sectional area of a wire is 6 mm2.
Front door PGND cable
Green and yellow
The cross-sectional area of a wire is 6 mm2.
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Cables --- Power Cable Power Cable Between the DCDU,BBU,FAN and WRFU
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Cables --- Transmission Cable
E1 Cable
FE Cable
E1 Surge Protection Transfer Cable
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FE Surge Protection Transfer Cable
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Cables --- CPRI Cable This describes the CPRI electrical cable. It helps to implement high speed
communication between the BBU3900 and the WRFU. Appearance : The CPRI electrical cable is an SFP high speed transmission
cable that has a SFP200 male connector at each end.
One End
The Other End
CPRI port on the WBBP
CPR10 port on the WRFU
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Chapter 1 NodeB Overview Chapter 2 BTS3900 Hardware Structure Chapter 3 BTS3900 Typical Configuration
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Configuration Types of the BTS3900 The BTS3900 supports omni-directional, 2-sector, 3-sector, and 6-sector
configurations. It also supports smooth capacity expansion from 1x1 to 3x8. This part illustrates the configuration type of the BTS3900 by taking the WBBPa
supporting three cells and the WRFU supporting the 80W/4 carrier as an example.
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