Traning Modul Huawei MBTS 3900 and 3900A

GSM PrinciplesTraning Modul Huawei MBTS 3900 and 3900A

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Page* ObjectivesUpon completion of this course, you will be able to:Grasp basic idea of GSM system such as frequency spectrum, frequency reuse etc.Grasp the structure of the GSM system and the protocol used.

Page* ContentsGSM System OverviewGSM Network Structure

Page*GSM DevelopmentStandard Protocol for GSM take effectSystem was named as Global System for Mobile Communication GSM system began to provide service in Europe(2G)Provide services for the whole worldMicro Cell Technique is used in GSM system19891991199219941996

Page*GSM 900Duplex Separation: 45MHzChannel Bandwidth: 200KHzThe Frequency Spectrum

Page*Duplex Separation: 95MHzChannel Bandwidth: 200KHzDCS 1800The Frequency Spectrum

Page*Cell TypesOmni-directional Cell120 Degree Cell

Page*ContentsGSM System OverviewGSM Network Structure

Page*GSM-GPRS Network ComponentGSM /GPRS BSSBTSBSCBTSBSCPCUSS7SMS systemPSTNISDNInternet,IntranetMSC/VLRGMSCHLR/AUCSGSNCGBGGGSNOther PLMNMSMSOMC

MBTS GSMField Maintenance Page *

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ReferencesBTS3900 Hardware DescriptionBTS3900 GSM Site Maintenance Terminal User Guide

ObjectivesUpon completion of this course, you will be able to:Grasp the hardware structure of MBTSGet a good grasp of the BTS maintenanceMaintain site on local terminalExecute the tasks of field maintenance

ContentsChecking hardwareLEDsCable connectionsSite local maintenanceReplacing boardsRoutine maintenance list

BTS3900(A) System OverviewPage*BTS3900BTS3900AIndoor macro cabinetIndoor BTSBTS 3900Outdoor BTSBTS 3900A

Page*DBS3900 System OverviewDBS3900 components:BBU3900RRU3908, RRU3804, RRU3008

Page*Boards and Modules in BBUBSBC: The universal BBU Subrack Backplane type C GTMU: The GSM Transmission, Timing and Management UnitUBFA: 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

Page*Page*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

Page*Page*GTMU (Cont.)

PortConnector TypeDescriptionCPRI0 to CPRI5SFPPorts for the communication between the BBU and the RF module; support input and output of the optical and electrical signal.EXT (GTMUb)SFPObligateETHRJ45Port for local maintenance and commissioning.FE0RJ45Connects the BBU to a routing device in the equipment room through the Ethernet cable to transmit network information.FE1DLCConnects the BBU to a routing device in the equipment room through the optical cable to transmit network information.USBUSBEnables the automatic software upgrade from a USB disk.TSTUSBProvides a reference clock for the tester.E1/T1DB26 femaleProvides four E1/T1 inputs and outputs between the GTMU and the UELP or BSC

Page*UBFAThe 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 cabinetThe UBFA module communicates with the GTMU to regulate the temperature, adjust the fan speed, and report alarms. The UBFA module is hot swappable

LabelColorStatusDescriptionSTATERed/Green0.125s 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.OFFThe module is powered off or the program is not loaded.

Page*UPEUThe 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

PortTypeDescriptionMON0RJ45Transmitting two RS485 environment monitoring signalsMON1RJ45Transmitting two RS485 environment monitoring signalsEXT-ALM0RJ45Transmitting four dry contact alarmsEXT-ALM1RJ45Transmitting four dry contact alarmsPWR3V3+24 V/-48 V DC power input

Page*UEIUUEIU is the environment interface board of BBU, it can support multi-route monitoring signal inputUEIU is optional and is only used when more ports are needed

LabelConnector TypeDescriptionMON0RJ45One RS485 signalMON1RJ45One RS485 signalEXT-ALM0RJ45Four dry contact signalsEXT-ALM1RJ45Four dry contact signals

Page*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

Page*Monitoring System for the BTS3900 Cabinet (-48 V DC)

Page*Monitoring System for the BTS3900Cabinet (+24 V DC)

Page*Monitoring System for the BTS3900 Cabinet (AC)

Page*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 LEDsPower supply test ports RS232/RS422 ports Battery control switch COM port

Page*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 123

Page*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

Page*Page*Ports on the GRFU

PortLabelFunctionRFANT_RXBRF RX port, connecting to the antenna system.ANT_TX/RXARF TX/RX port, connecting to the antenna system.CPRICPRI0Connecting the BBU or the upper-level cascaded GRFU.CPRI1Connecting the BBU or the lower-level cascaded GRFU.Inter-GRFURF signalRX_INBInput port for diversity receive.RX_OUTAOutput port for main receive.Power supplyPWRIntroducing power input.MonitoringMONMonitoring and maintaining port.

Page*MRFU Ports

Port TypeLabelConnector TypeDescriptionPort fortransceivingRF signalsANT_RXBDIN connectorConnecting to the antenna subsystem.ANT_TX/RXACPRICPRI0SFP female connectorConnecting to the BBU, or the upper-level RFU during the cascading.CPRI1Connecting to the lower-level RFU during the cascading.Interconnection port for RFReceive signalsRX_INBQMA femaleconnectorInput port of diversity signals in theantenna channel.RX_OUTAOutput port of diversity signals in theantenna channel.Power supply portPWR3V3 power connectorFeeding power.Monitoring portMONRJ45 connectorRS485 Monitoringdebugging port.

Page*MRFU LED

LabelStatusDescriptionRUNONThe power input is normal, but the module is faulty.OFFThere is no power input, or the module is faulty.ON for 1s and OFF for 1sThe module is running properly.ON for 0.125s and OFF for 0.125sThe module is loading software or is not started.ALMONThe module is in the alarm status.OFFNo alarm is generated.ACTONThe module is functional and is connected to the BBU.OFFThe module is not connected to the BBU.ON for 1s and OFF for 1sThe module is in the local test status.

Page*MRFU LED

VSWROFF (red)No VSWR alarm is generated.ON (red)A VSWR alarm is generated.CPRI0ON (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.CPRI1ON (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.

LabelStatusDescription

Page*RRU ModuleThe RRU module has a bottom panel, a cabling cavity panel, and an area attached with LEDs. Provides - 48VDC power supply.

1Bottom panel 2Cabling cavity panel 3LEDs

Page*RRU Ports

ItemLabelDescriptionBottom panel RX_IN/OUTInterconnection ports for RF signalsRETRET antenna portANT_TX/RXARF TX/RX port AANT_TX/RXBRF TX/RX port BCabling cavity panel RTN+Power wire postNEG-TX RX CPRI_EEastern optical portTX RX CPRI_WWestern optical portEXT_ALMAlarm PortRSTHardware reset buttonTST VSWRTest button for VSWR alarmsTST CPRITest button for the CPRI port

Page*RRU LEDs

LEDColorStatusDescriptionRUNGreenONThe RRU is faulty.OFFNo power input is available.1s ON,1s OFFThe RRU runs properly.ON for 0.25sOFF for 0.25sThe software is being loaded.ALMRedON or Blinking (1s ON, 1s OFF)The RRU is faulty and reporting alarms.OFFNo alarm is generated.ACTGreenONThe RRU runs properly.OFFThe connection to the BBU is not established.VSWR TX_ACTRedOFFNo VSWR alarm is generated.1s ON1s OFFA VSWR alarm is generated on the ANT_TX/RXB port.ONA VSWR alarm is generated on the ANT_TX/RXA port.0.125s ON0.125s OFFA VSWR alarm is generated on the ANT_TX/RXA and ANT_TX/RXB ports.

Page*RRU LEDs

CPRI_W (westward CPRI LED)Red or greenGreenThe CPRI link is functional.RedThe reception of the optical module is abnormal and an alarm is generated.Blinking red 0.25s ON, 0.25s OFFThe CPRI link has a loss-of-lock error.OFFThe SFP module is not in position or the optical module is powered off.CPRI_E (eastward CPRI LED)Red or greenGreenThe CPRI link is functional.RedThe reception of the optical module is abnormal and an alarm is generated.Blinking red 0.25s ON, 0.25s OFFThe CPRI link has a loss-of-lock error.OFFThe SFP module is not in position or the optical module is powered off.

Transmission E1/T1 Cable ConnectionFigure 1Figure 2

If...Then...The co-transmission mode is usedLink 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 usedLink 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.

Transmission FE/GE Cable Connection

If...Then...The separate transmission mode is usedConnect 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.


If...Then...The co-transmission mode over the electrical port is usedConnect 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.


If...Then...The co-transmission mode over the optical port is usedConnect 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 respectivelyNOTE: The FE/GE optical cable should be wrapped a winding pipe,

CPRI Cable ConnectionsStar topologyChain topologyGSM only

CPRI Cable ConnectionsGSM + LTEDual-star topology over CPRI ports CPRI cable connections in co-cabinet mode

CPRI Cable ConnectionsCPRI cable connections in a co-cabinet base station with WRFUs and DRFUs/GRFUs Dual-star topology over CPRI ports GSM + UMTS

CPRI Cable ConnectionsGSM + UMTS + LTECPRI cable connections for a base station configured with six GSM+UMTS RFUs, three UMTS only RFUs, and three LTE only RFUs Example: GU + LO

RF Cable ConnectionsSingle Cabinet Stacked cabinet

Power Cable Connection-48 V DC power

ContentsChecking hardwareSite local maintenanceReplacing boardsRoutine maintenance list

Local MaintenanceConnect the maintenance terminal computer with the ETH port on TMU by crossed cable.

Start the Local Terminal System

Login Site Maintenance Terminal

Site Maintenance TerminalNavigation PaneView PaneStatus Pane

Obtain the Site Management right

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.

Load Softwareload software to the main control board.

Activate SoftwareValidate the board software loaded onto the main control board. The board software consists of the main control board software and other board software.

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.

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.

Change the Cell Management StateLock or Unlock the BTs and RCs of a cell.

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.

Change the BT Management StateLock or Unlock a BT.

View the Channel StatusQuery the status of all the channels on a BT.

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.

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.

Board Management

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.

Reset a boardinitialize the parameters associated with a board

Test a Board check whether the hardware of the board is damaged

Query Port Attributesquery the availability status, management status, active/standby status, and physical property of ports.

Release Management RightAt last, release management right

ContentsChecking hardwareSite local maintenanceReplacing boardsHardwareSoftwareRoutine maintenance list

Page*1)2)Disconnecting cables Removing the GTMU Procedure of Replacing the GTMU - Hardware operation

Procedure of Replacing the GTMUStep 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.Page*

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 stationPage*

Replacing the UPEUHardware Operation1)2)Disconnecting the cable Removing the UPEU

Replacing the UPEU Step by stepM2000 blocks the cells remotelyPower off the boardDisconnect power, monitoring and alarm cableRemove UPEUInstall new boardPower on the BBUCheck the LED status of the new bioardM2000 unblocks cells

Replacing the UEIUHardware Operation1)2)Disconnecting the cable Removing the UEIU

Replacing the UEIUHardware OperationDisconnect monitoring and alarm cableRemove UEIUInstall new boardM2000: check that no alarms related to the new board are generated

Replacing the Fan Box Hardware OperationRaising the adjustable cable trough

Replacing the Fan BoxHardware Operatiom (Cont.)Removing the fan box

Replacing the Fan Box Step by stepSet 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.

Replacing a DCDU-01Hardware Operation1)2)Removing the protection cover Removing the screws from the two mounting ears of the DCDU-01

Replacing a DCDU-01Step by stepPower 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.

Replacing a DCDU-01Step 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.

Replacing the PMU/PSUHardware OperationRemoving the PMU/PSUSetting the DIP switch on new PMU

Replacing the PMU/PSUStep by stepThis 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 PMULabel 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.

Replacing the PMU/PSUStep by stepSlide 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.

Replacing an RFU - Hardware OperationLabelRemoving the RFU

Replacing an RFUGeneral RemarksReplacing 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.

Replacing an RFUStep by stepBefore 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.

Replacing an RFUStep 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 Nm to 35 Nm) 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.

Replacing an RRUHardware OperationLoosening captive screws on the main mounting bracket Tightening screws on the attachment plate Supporting the RRU bottom 1)2)3)

Replacing an RRUGeneral RemarksReplacing 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.

Replacing an RRUStep by stepPower 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.

Replacing an RRUStep by step (Cont.)Tighten the captive screws on the two hoist clamps on the main mounting bracket to 1.4 Nm (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 Nm (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.

ContentsChecking hardwareSite local maintenanceReplacing boardsHardwareSoftwareRoutine maintenance list

Upgrading Software through SMTIn the left pane of the Site Maintenance Terminal System window, select Board. In the right pane of the window, double-click Board Management

Checking the MRFU Software VersionRight-click MRFU0, and then click Board Information. The query is successful. The Board Information dialog box is displayed

Checking the GTMU Software VersionRight-click GTMU, and choose Board Information from the shortcut menu. The Board Information dialog box is displayed

Upgrading the MBTS SoftwareSelect the program fileUse the maximum value to have faster download speedInput the program versionSelect the program type

Forcibly Loading Software

Activating SoftwareInput the version numberInput the board number to be activatedSelect the program type

Upgrading Software Through the USB1. 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|MRFU2. Save the pre-configuration file in ASCII mode.3. Copy the file Precfg.ini to BTS3900 GSM directory in the USB storage device.

4. Save the GBTS software package and configuration script under the specified path in the USB deviceUpgrading Software Through the USB

Upgrading Software Through the USB1. 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.

Upgrading Software Through the USB3. 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

ContentsChecking hardwareSite local maintenanceReplacing boardsRoutine maintenance list

BTS Equipment Room Maintenance Items

BTS Power Supply and Grounding System Maintenance Items

Cabinet Maintenance Items

SummaryThis 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.

Thankyou

*Course NameConfidential Information of Huawei. No Spreading Without Permission P-*Course NameConfidential Information of Huawei. No Spreading Without Permission P-*Course NameConfidential Information of Huawei. No Spreading Without Permission P-*Course NameConfidential Information of Huawei. No Spreading Without Permission P-*Course NameConfidential Information of Huawei. No Spreading Without Permission P-*Course NameConfidential Information of Huawei. No Spreading Without Permission P-*Course NameConfidential Information of Huawei. No Spreading Without Permission P-*Course NameConfidential Information of Huawei. No Spreading Without Permission P-*P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceP-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceP-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceBTS3900 System OverviewThe BTS3900 consists of the BBU3900, RFUs, and indoor macro cabinet. The BBU3900 and RFUs are installed in the indoor macro cabinet.The RFUs are of two types: DRFUs and GRFUs in GSM mode, MRFUs in Dual mode. BTS3900A System OverviewThe BTS3900A consists of the BBU3900, RFUs, power cabinet, and RF cabinet. The BBU3900 is installed in the power cabinet, and the RFUs are installed in the RF cabinet.The RF modules are the same as the BTS3900.Confidential Information of Huawei. No Spreading Without Permission P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission RRU 3908 : The single RRU3908 module supports six carriers when working in GSM mode and GSM+UMTS dual mode, and four carries in UMTS modeRRU 3804 : RRU 3804 can support a maximum of four TRXsRRU 3008 : RRU3008 can support a maximum of eight TRXsP-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission Confidential Information of Huawei. No Spreading Without Permission The GTMU and GTMUb have the following functions:Controls and manages the base station Supports fault management system, configuration management system, performance management system, and security management system Monitors the fans and power modules Provides and manages the clock source of the base station in centralized mode Provides the clock output for test Provides the FE port for maintenance on the OM system Supports transmission through four E1s and two FEs Provides CPRI ports for communication between the BBU and the RFUs The GTMUb supports interconnected BBUs. Four IDX2 ports on the backplane of the GTMUb can achieve the function of baseband resource pool backup. P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission Confidential Information of Huawei. No Spreading Without Permission P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission The UBFA has the following functions: Controlling the fan speed Reporting the fan status to the main control board. Detecting the temperature of the air inlets

P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission The UPEU is classified into the Universal Power and Environment Interface Unit Type A (UPEA) and the Universal Power and Environment Interface Unit Type B (UPEB). The UPEA converts -48 V DC to +12 V DC The UPEB converts +24 V DC to +12 V DCThe UPEU has the following functions: Converting -48 V or +24 V DC to +12 V DC that is applicable to the boards Providing two ports with each transmitting one RS485 signal and another two ports with each transmitting four dry contact signals Providing reverse connection protection for power cable connectors.

P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission The UEIU transmits monitoring signals and alarm signals from external devices to the main control board Providing two ports with each transmitting one RS485 signal Providing two ports with each transmitting four dry contact signals P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission The fan box regulates the temperature at the air inlet of the cabinet and in the fan box. It can adjust the rotation speed of the fans to implement ventilation and dissipation for the cabinet.The fan box performs the following functions:Provides forced ventilation and dissipation for the cabinet Supports two modes of adjusting the rotation speed of the fans: adjustment based on the temperature and adjustment controlled by the central processing unit Communicates with the central processing unit to report alarms and the adjusted rotation speed of the fans based on the temperature to the central processing unit Stops the rotation of the fans when the ambient temperature is low

A fan box is configured with one NFCB and four fans.NFCBThe NFCB is located in the fan box and consists of the control unit and the power supply unit. The power supply unit filters and converts the -48 V DC power input, and distributes power to the control unit and each fan. The NFCB detects the temperature at the air inlet and reports it to the central processing unit. The rotation speed of the fans can be regulated by the central processing unit or adjusted automatically based on the temperature. FansThe fans perform forced heat dissipation for the entire cabinet. The fans are configured in N+1 mode. When one fan fails, the other fans rotate at full speed. At normal temperature, the fans can meet the heat dissipation requirements.

P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission A maximum of two BTS3900 cabinets can be configured for a single site. The monitoring system described in this part is applicable to the configuration of two cabinets. If there is only one cabinet at the site, neglect cabinet 1 and its cable connection. If any device in the figure is not configured at the site, neglect the device and its cable connection P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission The BTS3900 cabinet (+24 V DC) is configured with the DC/DC power system. The alarms reported include dry contact alarms. The ALM ports on the two cabinets are connected to the same dry contact alarm port through interconnection terminals. The monitoring system for the BTS3900 cabinet (+24 V DC) are shownA maximum of two BTS3900 cabinets can be configured for a single site. The monitoring system described in this part is applicable to the configuration of two cabinets. If there is only one cabinet at the site, neglect cabinet 1 and its cable connection. If any device in the figure is not configured at the site, neglect the device and its cable connection.

P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission The monitoring system for the BTS3900 cabinet (AC) configured with the PMU is shown.A maximum of two BTS3900 cabinets can be configured for a single site. The monitoring system described in this part is applicable to the configuration of two cabinets. If there is only one cabinet at the site, neglect cabinet 1 and its cable connection. If any device in the figure is not configured at the site, neglect the device and its cable connection.P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission Detects power distribution and reports alarms, and also reports dry contact alarms

P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceP-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission Confidential Information of Huawei. No Spreading Without Permission P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission Confidential Information of Huawei. No Spreading Without Permission LEDs on the GRFU:P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission RF Unit handles modulation and demodulation between baseband signals and RF signals, data processing, and combining-distribution. The MRFU is a multi-carrier RF filtering unit. One MRFU supports a 6 TRXs in GSM Only mode or 4 TRXs in UMTS Only mode or 6 TRXs in GSM+UMTS mode.

P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceP-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceP-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceConfidential Information of Huawei. No Spreading Without Permission P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceP-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceP-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceP-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceP-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceCPRI cable connections for a GSM only configuration.P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceCPRI cable connections for a GSM and LTE configuration.P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceCPRI cable connections for a GSM + UMTS configuration.P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceCPRI cable connections for a GSM + UMTS + LTE configuration.

P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceThe RF jumpers are lead into the cabinet through the cable holes.The DIN connectors of the RF jumpers are linked to the ports labeled ANT on the panels of the RFUs. Figure shows the RF jumper connections in a single cabinet, and shows the RF jumper connections in stacked cabinets.Use a torque wrench to tighten the DIN connector until the fastening torque reaches 25 Nm to 35 Nm. NOTE: If the RFUs are interconnected through the inter-RFU RF signal cable, the RF jumper is connected to the lower RF port on the RFU.P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field Maintenance-48 V DC Power:P1-P6: power cable between the DCDU and the RFU, P7: power cable between the DCDU and the FAN unit, P8: power cable between the DCDU and the BBU, P11-P12: BTS3900 input power cable (-48 V).+24 V DC Power:P1-P6: power cable between the DCDU and the RFU, P7: power cable between the DCDU and the FAN unit, P8: power cable between the DCDU and the BBU, P11-P12: power cable between the PSU (DC/DC) and the DCDU, P25-P28: BTS3900 input power cable (+24 V).220 V AC Power:P1-P6: power cable between the DCDU and the RFU, P7: power cable between the DCDU and the FAN unit, P8: power cable between the DCDU and the BBU, P11-P12: power Cable between the PSU (AC/DC) and the DCDU, L, N: BTS3900 input power cable (220 V).+24V DC220V ACP-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceP-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceRemote Site Maintenance: maintaining the BTS through the LMT on the BSC side Site Maintenance Terminal: maintaining the BTS by directly connecting the Site Maintenance Terminal PC to the BBU of the base station through the Ethernet ports P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceThis describes how to set the IP address of the Site Maintenance Terminal PC to the same network segment as the IP address (192.168.0.72/255.255.255.0) of the BTS. Double-click btsm.exe to start the SMT. btsm.exe can be get from BTS3900 version software.P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceUser name: OmcUser Password: OmcP-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceThe Site Maintenance Terminal System software window consists of the navigation pane, view pane, and status pane.P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceThe site management right refers to the right to set the parameters of a BTS. After a BTS is powered on, the remote Site Maintenance System obtains the site management right by default. Before operating the BTS through the Site Maintenance Terminal System, you must obtain the site management right first.When operating a BTS through the Site Maintenance Terminal System, pay attention to the following:Obtain the site management right before writing data; otherwise, you may not be able to write data, for example, load a software or activate a software. You can read data from the BTS without the site management right. After a BTS is powered on, the remote Site Maintenance System obtains the site management right by default and performs all operations directly. Before operating the BTS through the Site Maintenance Terminal System, you must obtain the site management right first. You cannot operate the BTS through the Site Maintenance Terminal System and the remote Site Maintenance System at the same time. After completing the local maintenance, you must release the site management right.

P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceViewing Site Resources This function is performed to view the following site resources: CPU usage, RAM usage, DC voltage, temperature in a cabinet, humidity in a cabinet, current of battery, temperature of battery, load current, AC voltage, and quantity of state. This function can also be performed to obtain the board temperature. Forcibly Loading Software This function is performed to load software to the main control board. Activating Software This describes how to validate the board software loaded onto the main control board. The board software consists of the main control board software and other board software. Resetting a Site Hierarchically Resetting a site involves third level reset and fourth level reset. The third level reset and the fourth level reset are used to reinitialize the base station, that is, to reset all the boards in the base station and load the configuration data of the base station from the BSC. Monitoring Environment This function is performed to monitor and manage the environment parameters in a site. By performing this function, you can view the current temperature and humidity and set the temperature and humidity thresholds. The BTS can run normally in a safe and suitable site environment. You can also clear a burglar alarm or a smoke alarm and disable an EAC alarm. Viewing the Bar Codes This describes how to view the bar codes of the boards configured in the currently connected BTS. Managing the RET Antenna This function is performed to query and set parameters of the RET antenna connected to the BTS. P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field Maintenance1.In the left pane of the Site Maintenance Terminal System window, click Site. In the right pane of the window, double-click Forced Software Load. The Software Download dialog box is displayed. 2.Set File Name. In the Send Window Size spin box, specify a size. In the Version area, enter a version number. In the File ID drop-down list box, select GTMU_MAIN3.Click Start. You can view the loading progress in the Site Maintenance Terminal System. If the software is loaded successfully, the Loading software successfully message is displayed on the status bar. P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field Maintenance1.In the left pane of the Site Maintenance Terminal System window, click Site. In the right pane of the window, double-click Software Activation. The Software Activation dialog box is displayed. 2.In the Version area, enter the version number of the main control board software. In the File ID drop-down list, select the file ID3.Click OK. The number of the board that is successfully activated is displayed in the The board list activated successfully: area. The Software activation successfully message is displayed on the status bar at the bottom of the dialog box. 4.Activate other board software. In the Version area, enter the version number of the software to be activated. In the Board No. area, enter the number of the board to be activated. In the File ID drop-down list, select the board software to be activated.5.Click OK. The number of the board that is successfully activated is displayed in the The board list activated successfully: area. The Software activation successfully message is displayed on the status bar at the bottom of the dialog box. P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceP-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceManaging Cell Attributes This function is performed to view or set the interference level boundary, interference average parameter, connection failure threshold, T200, overload period, starting frame No., CCCH load threshold, CCCH load indicating period, RACH busy determination threshold, RACH load averaging slots, BTS air timer, NY1, BSIC, BCCH ARFCN, and Max. time advance. Managing Cell Extended Attributes This function is performed to view or set the RF resource indication period, paging times, and access error threshold. Changing the Cell Management State This function is performed to lock or unlock the BTs and RCs of a cell. Performing the Cell Performance Test This function is performed to test all the RCs of a cell and to check whether they are functional.

P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field Maintenance1.In the left pane of the Site Maintenance Terminal System window, click Cell. In the right pane of the window, double-click Change Cell Management State. The Change Cell Management State dialog box is displayed.2.Select the management state you need. The parameters displayed on the terminal are the activated parameters on the BTS. You can adjust their values. 3.Click OK. The cell management state is changed successfully. The result is displayed on the status bar at the bottom of the Change Cell Management State dialog box P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceChanging the BT Management State This function is performed to lock or unlock a BT. Re-Initializing a BT This function is performed to reset a BT and to reload the configuration data of the BT. Performing BT Tests The BT tests involve the BIU loopback test and the TRX self-test. The BIU loopback test is performed to check the connection between the BT of the specified TRX and the physical links of the Abis signaling channel. The TRX self-test is performed to check RCs and report the test result. Viewing the Channel Status This function is performed to query the status of all the channels on a BT. Setting the TRX Full Power Emission This function is performed to enable a specified TRX to perform the full power emission and to test the transmit power level of signals. Based on this level, the software and hardware parameters can be adjusted accordingly during network planning. Therefore, the coverage of the BTS can be optimized.

P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field Maintenance1.In the left pane of the Site Maintenance Terminal System window, click BT. In the right pane of the window, double-click Change BT Management State. The Change BT Management State dialog box is displayed.2.Choose a BT and a management state. The parameters displayed on the terminal are the activated parameters on the BTS. You can adjust their values. 3.Click OK, and then Performing BT Opstart. The BT management state is changed successfully. The result is displayed in the Operational result pane .You can click the Operational result pane to have it enlarged. The detailed information can be displayed in the pane. You can click in the enlarged pane to have the pane return to the original state.P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceIn the left pane of the Site Maintenance Terminal System window, click BT. In the right pane of the window, double-click View Channel State. A channel can be in any of the following states: A (Active), I (Idle), O (Out of Service), B (Blocked), and U (Unavailable). A channel in the O, B, or U state cannot be seized by a call.P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceManaging Channel Attributes This function is performed to view or set the channel parameters, including channel combination, TSC selection, and starting frame number. Changing the Channel Management State This function is performed to lock or unlock a channel. Performing the Loopback Test This function is performed to check the quality of a channel by testing the parameters such as the bit error ratio (BER) and transmit power of the channel.

P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceManaging RC Attributes This function is performed to view and set the Absolute Radio Frequency Channel Number (ARFCN), that is, the frequency number of the current RC. Managing RC Extended Attributes This function is performed to view or set the extended RC attributes, including the static power level, saturation threshold, saturation voltage threshold, and power mode. Changing the RC Management State This function is performed to lock or unlock an RC. Re-Initializing an RC This function is performed to reset an RC. After the RC is reset, the GTMU sends the stored configuration data to the RC again, and the configuration data takes effect on the RC. Obtaining the RC Power Mode This function is performed to view the power type and the current work mode of an RC. Obtaining the Auto Power Adjustment Type This function is performed to obtain the information about the frequency band of an RC and whether the RC supports the automatic power control function.

P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceQuerying Board Information This describes how to query the board running state, software version, board alarm count, current clock state, board in-position information, and clock master/backup state. Resetting a board This function is performed to initialize the parameters associated with a board. Testing a Board This function is performed to check whether the hardware of the board is damaged. Setting the BTS Clock This describes how to set the working mode of the BTS clock. Performing Loopback Test of Board Communication Links This function is performed to check whether the GTMU communicates with the Site Maintenance Terminal normally. Querying Port Attributes This function is performed to query the availability status, management status, active/standby status, and physical property of ports. Querying the Patch Information in Flash This describes how to query the patch status in the flash of the GTMU. P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field Maintenance1.Click Board in the left pane of the Site Maintenance Terminal System window, and then double-click Board Management in the right pane of the window. The Board Management window is displayed 2.Right-click the board to be queried. A shortcut menu is displayed. 3. Select Board Information from the shortcut menu. The result is displayed in the Board Information dialog box P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field Maintenance1.In the left pane of the Site Maintenance Terminal System window, click Board. In the right pane of the window, double-click Board Management. The Board Management window is displayed2.Right-click the target board or module, such as GTMU. A shortcut menu is displayed. 3.Select Board Reset from the shortcut menu. The result is displayed in the Board Reset windowP-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field Maintenance1.Click Board in the left pane of the Site Maintenance Terminal System window, and then double-click Board Management in the right pane of the window. The Board Management window is displayed 2.Right-click the board to be tested, such as the GTMU. A shortcut menu is displayed. 3.Select Test from the shortcut menu. The Board Test dialog box is displayed If the test succeeds, you can infer that that no hardware of the board is damaged.

P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field Maintenance1.Click Board in the left pane of the Site Maintenance Terminal System window, and then double-click Board Management in the right pane of the window. The Board Management window is displayed 2.Right-click the target board or module, such as GTMU. A shortcut menu is displayed. 3.Select Query CRPI Property. The result is displayed in the GTMU port property window P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceP-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceP-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceCourse NameConfidential Information of Huawei. No Spreading Without Permission P-*

P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceProcedure1) The M2000 administrator should perform the following preparations: Run the SET GCELLADMSTAT command to block all the cells in the base station. If the base station is based on the static IP transmission mode, run the LST BTSIPRT command to query the IP address and route information of the base station on the BSC.2) Disconnect the transmission cable and CPRI cable from the GTMU. If a surge protection board is configured, the surge protection transfer cable also needs to be disconnected.3) Remove the two M3 screws on the panel, and then remove the GTMU.4) Set the DIP switch on the new board according to the settings of the DIP switch on the faulty board. 5) Install the new board, tighten the screws on the board until the tightening torque reaches 0.6 Nm, and then reconnect the cables. P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field Maintenance6) Check the status of the LEDs to determine whether the new board works properly. 7) If a static IP-based base station is used, perform the following operations: Connect the PC installed with the SMT application to the ETH port on the GTMU.

Log in to the SMT, and then configure the static IP data. Disconnect the PC installed with the SMT application from the GTMU. 8) Perform following operations on the LMT: a.Query the software version of the board. If the software version is the target version, go to c. If not, go to b. b.On the LMT, run the LST BTSAUTODLDACTINFO command to check whether the automatic load and activation of the BTS software is enabled on the BSC. If not, load and activate the GTMU software and TRXs of the corresponding base station. If yes, go to c. C. Ensure that no alarms related to boards are generated. 9) Perform following operations on the M2000: Run the SET GCELLADMSTAT command to unblock all the cells of the base station. Synchronize the inventory information manually10) Take off the ESD wrist strap or gloves, and then pack up all the tools.

P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceReplacing the UPEU disrupts the power supply to the BBU, and accordingly disrupts services carried by the BBU. Therefore, the UPEU should be replaced within 10 minutes.

Procedure1) Instruct the M2000 administrator to perform the following operations before replacing the UPEU: If a standby UPEU is configured, the services carried on the faulty UPEU are transferred to the standby UPEU. Run the BLK UCELL command to block all the cells of the base stations working in UMTS mode. Run the BLK CELL command to block all cells of the base station working in LTE mode. Run the LST GCELL command to query the configuration of all cells of the base station working in GSM mode, and then run the SET GCELLADMSTAT command to block those cells.2) Power off the BBU. 3) Disconnect the power cable, monitoring cable, and alarm cable from the UPEU 4) Remove the two M3 screws on the panel, and then pull out the UPEU 5) Install the new board, tighten the screws on the board until the tightening torque reaches 0.6 Nm, and then reconnect the cables. 6) Power on the BBU. 7)Check the status of the LEDs to determine whether the new board works properly. 8) Inform the M2000 administrator that the replacement is complete, and then instruct the administrator to perform the following operations: Run the UBL CELL command to unblock all the cells working in LTE mode. Run the UBL UCELL command to unblock all the cells working in UMTS mode. Run the SET GCELLADMSTAT command to unblock all the cells working in GSM mode. Check and ensure that no alarm related to the board is generated.

P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceReplacing the UPEU disrupts the power supply to the BBU, and accordingly disrupts services carried by the BBU. Therefore, the UPEU should be replaced within 10 minutes.

Procedure1) Instruct the M2000 administrator to perform the following operations before replacing the UPEU: If a standby UPEU is configured, the services carried on the faulty UPEU are transferred to the standby UPEU. Run the BLK UCELL command to block all the cells of the base stations working in UMTS mode. Run the BLK CELL command to block all cells of the base station working in LTE mode. Run the LST GCELL command to query the configuration of all cells of the base station working in GSM mode, and then run the SET GCELLADMSTAT command to block those cells.2) Power off the BBU. 3) Disconnect the power cable, monitoring cable, and alarm cable from the UPEU 4) Remove the two M3 screws on the panel, and then pull out the UPEU 5) Install the new board, tighten the screws on the board until the tightening torque reaches 0.6 Nm, and then reconnect the cables. 6) Power on the BBU. 7)Check the status of the LEDs to determine whether the new board works properly. 8) Inform the M2000 administrator that the replacement is complete, and then instruct the administrator to perform the following operations: Run the UBL CELL command to unblock all the cells working in LTE mode. Run the UBL UCELL command to unblock all the cells working in UMTS mode. Run the SET GCELLADMSTAT command to unblock all the cells working in GSM mode. Check and ensure that no alarm related to the board is generated.

P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceThe UEIU is hot-swappable. Replacing the UEIU disrupts the monitoring of the external equipment. Therefore, the UEIU should be replaced within five minutes.

Procedure1) Disconnect the monitoring cable and alarm cable from the UEIU.2) Remove the two M3 screws from the panel, and then remove the UEIU.3) Install the new board, tighten the screws on the board until the tightening torque reaches 0.6 Nm, and then reconnect the cables. 4) Inform the M2000 administrator that the replacement is complete, and then instruct the administrator to perform the following operations: Check that no alarm related to the board is generated. P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceThe UEIU is hot-swappable. Replacing the UEIU disrupts the monitoring of the external equipment. Therefore, the UEIU should be replaced within five minutes.

Procedure1) Disconnect the monitoring cable and alarm cable from the UEIU.2) Remove the two M3 screws from the panel, and then remove the UEIU.3) Install the new board, tighten the screws on the board until the tightening torque reaches 0.6 Nm, and then reconnect the cables. 4) Inform the M2000 administrator that the replacement is complete, and then instruct the administrator to perform the following operations: Check that no alarm related to the board is generated. P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceReplacing the fan box may result in over-temperature alarms due to interruption of heat dissipation for the cabinet, but services of the base station are not affected. It takes about 20 minutes to replace a fan box.Use the handle to replace the module. The handle is placed in the slot on the upper right inside the cabinet door.

Procedure1) Set the DC power switch labeled FAN on the DCDU-01 to OFF. 2) Label the cables on the panel of the fan box and then remove the cables. 3) 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.4) 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.5) Install the new fan box. Then, secure the four screws. 6) Place the adjustable cable trough to its original position, and then tighten the captive screws on both sides of the adjustable cable trough. 7) Install the cables to the panel of the fan box based on the labels. 8) Set the switch on the DCDU-01 for the fan box to ON.

P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceReplacing the fan box may result in over-temperature alarms due to interruption of heat dissipation for the cabinet, but services of the base station are not affected. It takes about 20 minutes to replace a fan box.Use the handle to replace the module. The handle is placed in the slot on the upper right inside the cabinet door.


P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceReplacing the fan box may result in over-temperature alarms due to interruption of heat dissipation for the cabinet, but services of the base station are not affected. It takes about 20 minutes to replace a fan box.Use the handle to replace the module. The handle is placed in the slot on the upper right inside the cabinet door.


P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceReplacing the DCDU-01 disrupts the services carried on the corresponding cabinet. It takes about 20 minutes to replace the DCDU-01.

Procedure1) Power off the BTS3900. 2) Label the cables connected to the output ports on the DCDU-01, and then disconnect them. 3) Use the screwdriver to remove the protection cover from the external power input wiring terminal block of the DCDU-01. 4) Label the external input power cable for the DCDU-01, and then disconnect the cable. 5) Remove the four M6x12 screws from the two mounting ears of the DCDU-01 and remove the DCDU-01.6) 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. 7) 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(+). 8) Place the protection cover on the DCDU-01, and then tighten the screws. 9) Remove the rubber covers from the DCDU-01 power sockets on the new DCDU-01 panel. 10) Connect the removed cables to the power output ports on the DCDU-01 panel according to the marks. 11) Power on the BTS3900. P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceReplacing the DCDU-01 disrupts the services carried on the corresponding cabinet. It takes about 20 minutes to replace the DCDU-01.

Procedure1) Power off the BTS3900. 2) Label the cables connected to the output ports on the DCDU-01, and then disconnect them. 3) Use the screwdriver to remove the protection cover from the external power input wiring terminal block of the DCDU-01. 4) Label the external input power cable for the DCDU-01, and then disconnect the cable. 5) Remove the four M6x12 screws from the two mounting ears of the DCDU-01 and remove the DCDU-01.6) 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. 7) 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(+). 8) Place the protection cover on the DCDU-01, and then tighten the screws. 9) Remove the rubber covers from the DCDU-01 power sockets on the new DCDU-01 panel. 10) Connect the removed cables to the power output ports on the DCDU-01 panel according to the marks. 11) Power on the BTS3900. P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceReplacing the DCDU-01 disrupts the services carried on the corresponding cabinet. It takes about 20 minutes to replace the DCDU-01.

Procedure1) Power off the BTS3900. 2) Label the cables connected to the output ports on the DCDU-01, and then disconnect them. 3) Use the screwdriver to remove the protection cover from the external power input wiring terminal block of the DCDU-01. 4) Label the external input power cable for the DCDU-01, and then disconnect the cable. 5) Remove the four M6x12 screws from the two mounting ears of the DCDU-01 and remove the DCDU-01.6) 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. 7) 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(+). 8) Place the protection cover on the DCDU-01, and then tighten the screws. 9) Remove the rubber covers from the DCDU-01 power sockets on the new DCDU-01 panel. 10) Connect the removed cables to the power output ports on the DCDU-01 panel according to the marks. 11) Power on the BTS3900. P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceThis 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 PMU1) Label the cables on the panel of the PMU, and then disconnect the cables from the PMU.2) Loosen the screws on the handle of the PMU panel by using a screwdriver. 3) Pull the handle gently to disconnect the PMU from the subrack, and then remove the PMU from the slot.4) Set the DIP switch on the new PMU. 5) Loosen the screws on the handle of the PMU. Then, pull the handle outwards. 6) Slide the PMU along the guide rails into the slot, and then push the handle back. 7) Tighten the screws on the handle. 8) Connect the cables, which have been disconnected from the PMU, according to the labels.

Procedure for replacing PSU1) Loosen the screws on the handle of the PMU panel by using a screwdriver. 2) Pull the handle gently to disconnect the PMU from the subrack, and then remove the PMU from the slot.3) Loosen the screws on the handle of the new PMU. Then, pull the handle outwards. 4) Slide the PMU along the guide rails into the slot, and then push the handle back. 5) Tighten the screws on the handle.

P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceThis 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.



P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceThis 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.



P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceReplacing 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.

1) 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.2) 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). 3) Set the corresponding DC output power switch on the panel of the DCDU to OFF to power off the RFU. 4) Label the power cable, RF jumper and CPRI cable on the panel of the faulty RFU, and then disconnect the cables. 5) 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. 6) 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. 7) Insert the CPRI cable, fix the RF jumper (fasten with tightening torque of 25 Nm to 35 Nm) and reinstall the power cable on the panel of the new RFU according to the labels. 8) Set the corresponding DC output power switch on the panel of the DCDU to ON to power on the RFU. 9) 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. 10) 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.







P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceReplacing 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.

ProcedurePower 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.Tighten the captive screws on the two hoist clamps on the main mounting bracket to 1.4 Nm (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 Nm (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.P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceReplacing 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.

ProcedurePower 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.Tighten the captive screws on the two hoist clamps on the main mounting bracket to 1.4 Nm (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 Nm (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.P-*Confidential Information of Huawei. No Spreading Without Permission MBTS GSM Field MaintenanceReplacing 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.

ProcedurePower 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.Tighten the captive screws on the two hoist clamps on the main mounting bracket to 1.4 Nm (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

Traning Modul Huawei MBTS 3900 and 3900A

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