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Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
MBTS GSM
Field Maintenance
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
References
BTS3900 Hardware Description
BTS3900 GSM Site Maintenance Terminal User Guide
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Objectives
Upon completion of this course, you will be able to:
Grasp the hardware structure of MBTS
Get a good grasp of the BTS maintenance
Maintain site on local terminal
Execute the tasks of field maintenance
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Contents
1. Checking hardware
1. LEDs
2. Cable connections
2. Site local maintenance
3. Replacing boards
4. Routine maintenance list
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
BTS3900(A) System Overview
Page5
BTS3900 BTS3900A
Indoor macro
cabinet
Indoor BTS
BTS 3900
Outdoor BTS
BTS 3900A
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page6
DBS3900 System Overview
DBS3900 components:
BBU3900
RRU3908, RRU3804, RRU3008
MBSC
Power cable
Power cable Trunk cable
CPRI cable
RRU3908
BBU3900
Grounding cable
Antenna
TMA
Feeder
RF jumper
Grounding cable
RF jumper
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page7
Boards and Modules in BBU
BSBC: The universal BBU Subrack Backplane type C
GTMU: The GSM Transmission, Timing and Management Unit
UBFA: The Universal BBU Fan unit type A
UPEU: The Universal Power and Environment interface Unit
UELP: The Universal E1/T1 Lightning Protection unit
UEIU: The Universal Environment Interface Unit
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page8 Page8
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.
Figure 1 GTMU panel
Figure 2 GTMUb panel
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page9 Page9
GTMU (Cont.)
Port Connecto
r Type Description
CPRI0 to
CPRI5 SFP
Ports for the communication between the BBU and the RF module;
support input and output of the optical and electrical signal.
EXT
(GTMUb) SFP Obligate
ETH RJ45 Port for local maintenance and commissioning.
FE0 RJ45
Connects the BBU to a routing device in the equipment room through
the
Ethernet cable to transmit network information.
FE1 DLC
Connects the BBU to a routing device in the equipment room through
the
optical cable to transmit network information.
USB USB Enables the automatic software upgrade from a USB disk.
TST USB Provides a reference clock for the tester.
E1/T1 DB26
female
Provides four E1/T1 inputs and outputs between the GTMU and the
UELP or BSC
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page10
UBFA The universal BBU fan unit type A (2U) (UBFA) works with the air inlet
box of the cabinet to form a ventilation circuit, thus cooling the entire
cabinet
The UBFA module communicates with the GTMU to regulate the
temperature, adjust the fan speed, and report alarms. The UBFA module
is hot swappable
Label Color Status Description
STATE Red
/Green
0.125s ON,
0.125s OFF
(Green)
The module is not registered, and
no alarm is reported.
1s ON, 1s
OFF (Green) The module is running properly.
1s ON, 1s
OFF (Red) The module is reporting alarms.
OFF The module is powered off or the
program is not loaded.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page11
UPEU
The universal power and environment interface unit (UPEU) supports
the -48V /-24V DC power input, supplies power to the boards, modules,
and fan in the BBU, and provides access to multiple environment
monitoring signals
Port Type Description
MON
0 RJ45
Transmitting two RS485
environment monitoring
signals
MON
1 RJ45
Transmitting two RS485
environment monitoring
signals
EXT-
ALM0 RJ45
Transmitting four dry contact
alarms
EXT-
ALM1 RJ45
Transmitting four dry contact
alarms
PWR 3V3 +24 V/-48 V DC power input
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page12
UEIU
UEIU is the environment interface board of BBU, it can support
multi-route monitoring signal input
UEIU is optional and is only used when more ports are needed
Label Connector
Type Description
MON0 RJ45 One RS485 signal
MON1 RJ45 One RS485 signal
EXT-
ALM0 RJ45
Four dry contact
signals
EXT-
ALM1 RJ45
Four dry contact
signals
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page13
Features and Functions of Fan Box
The FAN unit, also called the fan box module, dissipates the
heat in the cabinet. One FAN unit has four independent fans.
Detects the temperature
Communicates with BBU unit to report alarms and the
adjusted rotation speed of the fans to BBU
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page14
Monitoring System for the BTS3900
Cabinet (-48 V DC)
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page15
Monitoring System for the BTS3900
Cabinet (+24 V DC)
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page16
Monitoring System for the BTS3900
Cabinet (AC)
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page17
Main Functions of PMU(AC/DC) The Power and Environment Monitoring Unit (PMU)
provides a comprehensive function of power supply
management, power distribution check, and alarm
reporting.
Communicates with the GTMU through the RS232/RS422 serial
port
Manages the power system and the battery charging and
discharging
Detects and reports monitoring signals 1. LEDs
2. Power supply test ports
3. RS232/RS422 ports
4. Battery control switch
5. COM port
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page18
Main Functions of PSU(AC/DC)
Converting 220 V AC power to -48 V DC power and supplying -48 V
DC power to the DCDU
Monitoring alarms related to module faults (such as output
overvoltage, no output, and fan faults), alarms related to module
protection (such as over temperature protection and input
overvoltage/undervoltage protection), and module out-of-position
alarm
1 Power running
LED
2 Protection LED
3 Fault LED
1
2
3
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page19
Main Functions of DCDU
Receiving -48 V DC power input
Distributing the -48 V DC power of 10 outputs for boards and
modules in the cabinet
Providing surge protection of 10 kA in differential mode and 15
kA in common mode and providing dry contact for surge
protection failure
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page20 Page20
Ports on the GRFU Port Label Function
RF
ANT_RXB RF RX port, connecting to the antenna
system.
ANT_TX/RX
A
RF TX/RX port, connecting to the antenna
system.
CPRI
CPRI0 Connecting the BBU or the upper-level
cascaded GRFU.
CPRI1 Connecting the BBU or the lower-level
cascaded GRFU.
Inter-GRFU
RF signal
RX_INB Input port for diversity receive.
RX_OUTA Output port for main receive.
Power
supply PWR
Introducing power input.
Monitoring MON Monitoring and maintaining port.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page22
MRFU Ports Port Type Label
Connector
Type Description
Port for
transceiving
RF signals
ANT_RXB DIN
connector
Connecting to the antenna
subsystem. ANT_TX/RXA
CPRI
CPRI0
SFP female
connector
Connecting to the BBU, or
the upper-level RFU during
the cascading.
CPRI1
Connecting to the lower-
level RFU during the
cascading.
Interconnec
tion port
for RF
Receive
signals
RX_INB QMA
female
connector
Input port of diversity
signals in the
antenna channel.
RX_OUTA
Output port of diversity
signals in the
antenna channel.
Power
supply port PWR
3V3 power
connector Feeding power.
Monitoring
port MON
RJ45
connector
RS485 Monitoring、
debugging port.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page23
MRFU LED
Label Status Description
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 1s and OFF for
1s The module is running properly.
ON for 0.125s and OFF
for 0.125s
The module is loading software or is not
started.
ALM ON The module is in the alarm status.
OFF No alarm is generated.
ACT
ON The module is functional and is
connected to the BBU.
OFF The module is not connected to the BBU.
ON for 1s and OFF for
1s The module is in the local test status.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page24
MRFU LED
VSWR OFF (red) No VSWR alarm is generated.
ON (red) A VSWR alarm is generated.
CPRI0
ON (green) The CPRI link is normal.
ON (red) The interface module fails to receive
signals.
ON for 1s and OFF for
1s (red) The CPRI link is out of lock.
CPRI1
ON (green) The CPRI link is normal.
ON (red) The interface module fails to receive
signals.
ON for 1s and OFF for
1s (red) The CPRI link is out of lock.
Label Status Description
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page25
RRU Module
The RRU module has a
bottom panel, a cabling
cavity panel, and an area
attached with LEDs.
Provides - 48VDC power
supply.
1 Bottom panel
2 Cabling cavity panel
3 LEDs
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page26
RRU Ports Item Label Description
Bottom panel
RX_IN/OUT Interconnection ports for RF signals
RET RET antenna port
ANT_TX/RXA RF TX/RX port A
ANT_TX/RXB RF TX/RX port B
Cabling cavity
panel
RTN+ Power wire post
NEG-
TX RX CPRI_E Eastern optical port
TX RX
CPRI_W Western optical port
EXT_ALM Alarm Port
RST Hardware reset button
TST VSWR Test button for VSWR alarms
TST CPRI Test button for the CPRI port
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page27
RRU LEDs LED Color Status Description
RUN Green
ON The RRU is faulty.
OFF No power input is available.
1s ON,1s OFF The RRU runs properly.
ON for 0.25s
OFF for 0.25s The software is being loaded.
ALM Red
ON or Blinking
(1s ON, 1s OFF) The RRU is faulty and reporting alarms.
OFF No alarm is generated.
ACT Green ON The RRU runs properly.
OFF The connection to the BBU is not established.
VSWR
TX_ACT Red
OFF No VSWR alarm is generated.
1s ON
1s OFF A VSWR alarm is generated on the ANT_TX/RXB port.
ON A VSWR alarm is generated on the ANT_TX/RXA port.
0.125s ON
0.125s OFF
A VSWR alarm is generated on the ANT_TX/RXA and
ANT_TX/RXB ports.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page28
RRU LEDs
CPRI_W
(westward
CPRI LED)
Red or
green
Green The CPRI link is functional.
Red
The reception of the optical module
is abnormal and an alarm is
generated.
Blinking red
0.25s ON, 0.25s
OFF
The CPRI link has a loss-of-lock error.
OFF The SFP module is not in position or
the optical module is powered off.
CPRI_E
(eastward
CPRI LED)
Red or
green
Green The CPRI link is functional.
Red
The reception of the optical module
is abnormal and an alarm is
generated.
Blinking red
0.25s ON, 0.25s
OFF
The CPRI link has a loss-of-lock error.
OFF The SFP module is not in position or
the optical module is powered off.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Transmission E1/T1 Cable Connection
If... Then...
The co-
transmission
mode is used
Link the DB26 male connector of the E1/T1 cable to
the port labeled E1/T1 on the GTMU, and then
tighten the screws, as shown in Figure 1.
The separate
transmission
mode is used
Link the DB26 male connectors of two E1/T1 cables
to the ports labeled E1/T1 on the GTMU and on the
WMPT respectively, as shown in Figure 2.
Figure 1 Figure 2
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Transmission FE/GE Cable Connection
If... Then...
The separate
transmission mode
is used
Connect one FE/GE cable to the port labeled FE0 on
the WMPT/LMPT and another FE/GE cable to the
port labeled FE0 on the GTMU.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
If... Then...
The co-transmission mode
over the electrical port is used
Connect the FE/GE cable to the port
labeled FE0 on the WMPT/LMPT.
Connect the two ends of the
interconnection cable between the FE
optical ports to the ports labeled FE1 on
the GTMU and on the WMPT/LMPT
respectively.
Transmission FE/GE Cable Connection
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
If... Then...
The co-
transmission
mode over the
optical port is
used
Connect the FE/GE optical cable to the port labeled FE1 on
the WMPT/LMPT.
Connect the two ends of the interconnection cable between
the FE electrical ports to the ports labeled FE0 on the GTMU
and on the WMPT/LMPT respectively
NOTE:
The FE/GE optical cable should be wrapped a winding pipe,
Transmission FE/GE Cable Connection
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
CPRI Cable Connections
Star topology Chain topology
GSM only
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
CPRI Cable Connections
GSM + LTE
Dual-star topology over
CPRI ports CPRI cable connections
in co-cabinet mode
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
CPRI Cable Connections
CPRI cable connections in a co-cabinet
base station with WRFUs and DRFUs/GRFUs Dual-star topology
over CPRI ports
GSM + UMTS
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
CPRI Cable Connections
GSM + UMTS + LTE
CPRI cable connections for a base station configured with
six GSM+UMTS RFUs, three UMTS only RFUs, and three LTE only RFUs
Example: GU + LO
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
RF Cable Connections
Single Cabinet
Stacked cabinet
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Power Cable Connection
-48 V DC power
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Contents
1. Checking hardware
2. Site local maintenance
3. Replacing boards
4. Routine maintenance list
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Local Maintenance
Connect the maintenance terminal computer with the ETH port
on TMU by crossed cable.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Start the Local Terminal System
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Login Site Maintenance Terminal
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Site Maintenance Terminal
Navigation Pane
View Pane
Status Pane
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Obtain the Site Management right
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Managing Sites
Testing Transport Performance: This function
is performed to check whether the
transmission link is normal through an E1
loopback test and a timeslot loopback test.
Querying Alarm Delay Time: This function is
performed to query the alarm delay time of
boards.
Testing the RF Specifications: This describes
how to test the RF specifications. The
specifications of the receiver involve the
receiver sensitivity, GSM static L1 (first level)
function, and the block test. The
specifications of the transmitter involve
modulation spectrum, handover spectrum,
modulation accuracy, and spurious emission.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Load Software
load software to the main control board.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Activate Software
Validate the board software loaded onto the main control
board.
The board software consists of the main control board
software and other board software.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Manage Sites
Querying the Ring Topology Parameters: This
function is performed to query the ring
topology parameters, including the working
direction of a site in the ring topology (Port 0
is forward link and port 1 is reverse link) and
the indication of auto rotate in the ring
topology. If automatic rotation is permitted,
the result also involves the waiting time
before rotation and the scheduled time for
attempts before rotation.
Managing the Site Board Parameters: This
function is performed to view the parameters
associated with the boards configured in a
site.
Testing the E1 BER: You can get the
information about the link transmission
quality of the E1 port in real time by
monitoring the E1 BER.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Manage Cells
The cell management involves
managing cell attributes and cell
extended attributes, testing all
the BTs and RCs of a cell so that
they can be locked or unlocked,
and checking whether the BTs
and RCs are functional.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Change the Cell Management
State Lock or Unlock the BTs and RCs of a cell.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Manage BTs
The BT management involves
locking or unlocking a BT, resetting
a BT, performing the RC self-test,
view the status of the channels on a
specified BT, and enabling a
specified RC to transmit signals at a
predefined power level.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Change the BT Management State
Lock or Unlock a BT.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
View the Channel Status
Query the status of all the channels on a BT.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Managing Channels
The channel management
involves viewing and setting
channel attributes, locking or
unlocking a channel, and
checking the quality of a channel
by testing the parameters such as
the bit error ratio (BER) and
transmit power.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Managing RCs
The RC management involves
setting the attributes and
extended attributes of an RC,
locking or unlocking an RC,
resetting an RC, and adjusting
power of an RC automatically.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Board
Management
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Querying Board Information
query the board running state, software version, board
alarm count, current clock state, board in-position
information, and clock master/backup state.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Reset a board
initialize the parameters associated with a board
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Test a Board
check whether the hardware of the board is damaged
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Query Port Attributes
query the availability status, management status,
active/standby status, and physical property of ports.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Release Management Right
At last, release management right
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Contents
1. Checking hardware
2. Site local maintenance
3. Replacing boards
1. Hardware
2. Software
4. Routine maintenance list
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved. Page63
1)
2)
Disconnecting cables
Removing the GTMU
Procedure of Replacing the GTMU
- Hardware operation
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Procedure of Replacing the GTMU
Step by step On the BSC, run the SET GCELLADMSTAT command to block all
the cells of the base station.
If a static IP-based base station is used, run the LST BTSIPRT
command to query the IP address and route information on the
BSC.
Record all the cable connections on the panel of the module to
the replaced.
Disconnect the transmission cable and CPRI cable from the
GTMU and pull out the GTMU.
Set the DIP switches on the new board according to the
settings of the DIP switches on the faulty board.
Page64
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Procedure of Replacing the GTMU
Step by step (Cont.) Check the status of the LEDs to determine whether the
new board works properly.
If a static IP-based base station is used, configure the
static IP data.
Query the software version of the board.
Run the SET GCELLADMSTAT command to unblock all
the cells of the base station
Page65
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Replacing the UPEU
Hardware Operation
1)
2)
Disconnecting
the cable
Removing the UPEU
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Replacing the UPEU Step by step
M2000 blocks the cells remotely
Power off the board
Disconnect power, monitoring and alarm cable
Remove UPEU
Install new board
Power on the BBU
Check the LED status of the new bioard
M2000 unblocks cells
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Replacing the UEIU
Hardware Operation
1)
2)
Disconnecting
the cable
Removing the UEIU
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Replacing the UEIU
Hardware Operation
Disconnect monitoring and alarm cable
Remove UEIU
Install new board
M2000: check that no alarms related to the new board
are generated
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Replacing the Fan Box
Hardware Operation
Raising the adjustable cable trough
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Replacing the Fan Box
Hardware Operatiom (Cont.)
Removing the fan box
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Replacing the Fan Box Step by step
Set the DC power switch labeled FAN on the DCDU-01 to OFF.
Label the cables on the panel of the fan box and then remove the cables.
Loosen the captive screws on both sides of the adjustable cable trough. Then, raise
the cable trough and fix it at the upper mounting hole, as shown in the figure.
Remove the four screws from the fan box. Pull out the fan box by one-third of its
length with one hand by using the handle key, hold the fan box with the other hand,
and then pull the entire fan box out of the cabinet.
Install the new fan box.
Place the adjustable cable trough to its original position, and then tighten the
captive screws on both sides of the adjustable cable trough.
Install the cables to the panel of the fan box based on the labels.
Set the switch on the DCDU-01 for the fan box to ON.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Replacing a DCDU-01
Hardware Operation
1)
2)
Removing the protection cover
Removing the screws from the two mounting ears of the DCDU-01
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Replacing a DCDU-01
Step by step Power off the BTS3900.
Label the cables connected to the output ports on the DCDU-01, and
then disconnect them.
Use the screwdriver to remove the protection cover from the external
power input wiring terminal block of the DCDU-01. Label the external
input power cable for the DCDU-01, and then disconnect the cable.
Remove the four M6x12 screws from the two mounting ears of the
DCDU-01 and remove the DCDU-01.
Install the new DCDU-01 into the position where the original one was
located, and then use the four screws to secure the DCDU-01 to the
subrack.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Replacing a DCDU-01
Step by step (Cont.) Install the new DCDU-01 into the position where the original one was located, and
then use the four screws to secure the DCDU-01 to the subrack.
Insert the OT terminal of the power cable into the corresponding cable hole in the
wiring terminal block. Connect the OT terminal of the -48 V power cable (blue) to
the terminal labeled NEG(-), and then connect the OT terminal of the GND cable
(black) to the terminal labeled RTN(+).
Place the protection cover on the DCDU-01, and then tighten the screws.
Remove the rubber covers from the DCDU-01 power sockets on the new DCDU-01
panel.
Connect the removed cables to the power output ports on the DCDU-01 panel
according to the marks.
Power on the BTS3900.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Replacing the PMU/PSU
Hardware Operation
Removing the PMU/PSU
Setting the DIP switch on new PMU
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Replacing the PMU/PSU
Step by step This module is hot-swappable.
Replacing the PMU does not affect the services.
Replacing the PSU (AC/DC) causes power-off of the cabinet and thus disrupts all services
carried by the base station.
Procedure for replacing PMU
Label the cables on the panel of the PMU, and then disconnect the cables from the PMU.
Loosen the screws on the handle of the PMU panel by using a screwdriver.
Pull the handle gently to disconnect the PMU from the subrack, and then remove the PMU
from the slot.
Set the DIP switch on the new PMU.
Loosen the screws on the handle of the PMU. Then, pull the handle outwards.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Replacing the PMU/PSU
Step by step Slide the PMU along the guide rails into the slot, and then push
the handle back.
Tighten the screws on the handle.
Connect the cables, which have been disconnected from the
PMU, according to the labels.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Replacing an RFU - Hardware Operation
Label
Removing the RFU
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Replacing an RFU
General Remarks Replacing an RFU interrupts the services carried on the RFU.
The electronic labels of boards or modules to be replaced are
determined offline on the M2000 or online on the LMT to determine
the model of the boards or modules.
It takes about 6 to 10 minutes to replace an RFU, which involves
disconnecting the cables, removing screws, removing the faulty RFU,
inserting a new RFU, tightening the screws, connecting the cables to
the new RFU, and loading the software.
The GRFU V1 can be replaced by the GRFU V2, but the GFRU V2
cannot be replaced by the GRFU V1. The two types of GRFUs are
labeled for identification.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Replacing an RFU
Step by step Before replacement of the RFU module the M2000 administrator must perform the
following operations:
Transfer the services carried on the module if necessary.
Locate the faulty RFU, and then run the associated MML command on the LMT to block the faulty RFU.
Confirm that the TX channel of the RFU is disabled. In this case, the ACT LED on the panel
of the RFU blinks (on for 1s and off for 1s).
Set the corresponding DC output power switch on the panel of the DCDU to OFF to power
off the RFU.
Label the power cable, RF jumper and CPRI cable on the panel of the faulty RFU, and then
disconnect the cables.
Loosen the screws at the four corners of the RFU using a screwdriver, and then pull the
RFU outwards by 50 mm to 100 mm using the handle. Hold the RFU with one hand and
remove the RFU from the cabinet with the other hand.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Replacing an RFU
Step by step (Cont.) Place the new RFU on the corresponding guide rails, and then slide it along the rails until
it is in position, then tighten the captive screws at the four corners to secure the RFU on
the subrack.
Insert the CPRI cable, fix the RF jumper (fasten with tightening torque of 25 N·m to 35
N·m) and reinstall the power cable on the panel of the new RFU according to the labels.
Set the corresponding DC output power switch on the panel of the DCDU to ON to power
on the RFU.
Check the status of the LEDs to determine whether the new RFU works properly. For
details about the status of the LEDs, see the hardware description about the RFU.
Then the M2000 administrator should perform the following operations:
Load and activate the RFU software version.
Run the associated MML command to unblock the RFU.
Check that alarms related to the module are not generated.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Replacing an RRU
Hardware Operation
Loosening captive screws
on the main mounting bracket
Tightening screws on
the attachment plate
Supporting the RRU bottom
1) 2) 3)
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Replacing an RRU
General Remarks
Replacing an RRU interrupts the services carried on the
RRU.
The electronic labels of boards or modules to be replaced
are determined offline on the M2000 or online on the
LMT to determine the model of the boards or modules.
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Replacing an RRU
Step by step Power off the RRU.
Wear an ESD wrist strap or ESD gloves.
Loosen the protection screw on the cover plate of the RRU cabling cavity
and then push the handle outwards to open the cover plate.
Record all the cable connections on the panel of the module to be
replaced.
Disconnect cables from the ports in the cabling cavity and on the bottom
panel.
Loosen the captive screws on the two hoist clamps on the main mounting
bracket using an M4 screwdriver.
Tighten the screws on the attachment plate of the RRU using an M6
screwdriver. Use the screw only for removing the RRU, loosen the
connection between the attachment plate and the main mounting bracket,
and then lift the RRU bottom to remove it.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Replacing an RRU
Step by step (Cont.) Tighten the captive screws on the two hoist clamps on the main
mounting bracket to 1.4 N·m (12.39 lbf.in.). Install a new RRU and
then waterproof the RRU.
Reconnect all the cables to be connected to the RRU, and verify that
vacant cable troughs in the cabling cavity are blocked by waterproof
blocks.
Tighten the protection screw on the cover plate to 1.4 N·m (12.39
lbf.in.) and then close the cover plate.
Power on the RRU.
Check the operating status of the new RRU by observing the status of
RRU LEDs.
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
Contents
1. Checking hardware
2. Site local maintenance
3. Replacing boards
1. Hardware
2. Software
4. Routine maintenance list
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Upgrading Software through SMT
In the left pane of the Site
Maintenance Terminal
System window, select Board.
In the right pane of the
window, double-click Board
Management
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Checking the MRFU Software
Version Right-click
MRFU0, and then
click Board
Information. The
query is
successful. The
Board
Information
dialog box is
displayed
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Checking the GTMU Software
Version Right-click GTMU,
and choose Board
Information from
the shortcut
menu. The Board
Information
dialog box is
displayed
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Upgrading the MBTS Software
Select the
program file
Use the maximum value to
have faster download speed Input the
program version
Select the
program type
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Forcibly Loading Software
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Forcibly Loading Software
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Activating Software
Input the
version number
Input the board
number to be
activated
Select the
program type
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Upgrading Software Through the USB
1. Create a pre-configuration script.
Create a .txt, and name it as Precfg.ini. Then, add the
following contents to this file:
[PRECONFIG]
ALL=GTMU|MRFU
2. Save the pre-configuration file in ASCII mode.
3. Copy the file Precfg.ini to BTS3900 GSM directory in the
USB storage device.
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4. Save the GBTS software package and configuration
script under the specified path in the USB device
Upgrading Software Through the USB
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Upgrading Software Through the USB
1. Insert the USB disk into the USB port on the GTMU, as
shown in figure below.
2. Wait till the GBTS to download the software and configuration
file. When the LED on the USB disk blinks, the GBTS starts to
load the target software and parse the configuration file.
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Upgrading Software Through the USB
3. Confirm that the upgrade and data configuration are
completed. The whole process takes about 15 minutes. If
either of the following conditions persists for longer than
one minute, you can infer that the GBTS upgrade and
data configuration are completed.
4. Pull out the USB disk from the GBTS
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Contents
1. Checking hardware
2. Site local maintenance
3. Replacing boards
4. Routine maintenance list
Copyright © 2010 Huawei Technologies Co., Ltd. All rights reserved.
BTS Equipment Room Maintenance
Items
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BTS Equipment Room Maintenance
Items
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BTS Power Supply and Grounding
System Maintenance Items
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Cabinet Maintenance Items
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Summary
This course describes the local maintenance of the BTS,
including tools, checking the hardware and the replacing
of hardware and software. A routine maintenance list is
included as well.
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