Huawei Airbridge cBTS3612 Maintenance Manual Download Page 73

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On-site Maintenance Manual
Airbridge cBTS3612 CDMA Base Station

Chapter 4 Component

Replacement

4-8

4.2

Exceptional Procedure of Replacement

Note:

1. This procedure is based on the “4.1.1 Board Replacement”.

2. As we are going to focus on the parts different from the common replacement
procedure, be sure to get familiar with the “4.1.1 Board Replacement” first. Follow
the procedure exactly throughout the replacement process.

4.2.1 BTS E1 Surge Protector (BESP)

The physical structure and installation position of BESP are

rather different from those of the boards in the baseband subrack,

therefore, while basically observing the “4.1.1 Board Replacement”

(some processes, such as the board removal and installation, are not

applicable to BESP and thus, can be handled flexibly), we should

also pay attention to the following:

The influence on the service

Replacing a BESP may interrupt all the services transmitted

through it.

II.

Cut off and resume the power supply

Before replacing the board, we should toggle off all the switches

in the BTS switch box one by one (first the switch for the RF module,

then the baseband subrack, then the fan and then the power

Summary of Contents for Airbridge cBTS3612

Page 1: ...Huawei Technologies Co Ltd Administration Building Huawei Technologies Co Ltd Bantian Longgang District Shenzhen P R China Postal Code 518129 Website http www huawei com BOM 31033171 ...

Page 2: ...ite Maintenance Manual Airbridge cBTS3612 CDMA Base Station On site Maintenance Manual Airbridge cBTS3612 CDMA Base Station On site Maintenance Manual 8 4cm Huawei Technologies Co Ltd Huawei Technologies Co Ltd Huawei Technologies Co Ltd 5 4cm ...

Page 3: ...Airbridge cBTS3612 CDMA Base Station On site Maintenance Manual ...

Page 4: ...e Download Failure 2 9 2 2 1 Fault Description 2 9 2 2 2 Troubleshooting 2 9 2 3 Base Station Initialization Failure 2 11 2 3 1 Fault Description 2 11 2 3 2 Troubleshooting 2 11 2 4 OML Failure 2 13 2 4 1 Fault Description 2 13 2 4 2 Troubleshooting 2 13 2 5 Abis Signaling Link Failure 2 17 2 5 1 Fault Description 2 17 2 5 2 Troubleshooting 2 17 Chapter 3 Component Failure Handling 3 1 3 1 Compone...

Page 5: ...5 2 Troubleshooting 3 12 3 6 BTS Resource Distribution Module BRDM 3 14 3 6 1 Fault Description 3 14 3 6 2 Troubleshooting 3 14 3 7 BTS Transceiver Module BTRM 3 16 3 7 1 Fault Description 3 16 3 7 2 Troubleshooting 3 17 3 8 BTS High Power Amplifier Unit BHPA 3 20 3 8 1 Fault Description 3 20 3 8 2 Troubleshooting 3 20 3 9 Receive LNA Distribution Unit RLDU 3 23 3 9 1 Fault Description 3 23 3 9 2 ...

Page 6: ...Channel Process Module BCPM 4 10 4 2 5 BTS Resource Distribution Module BRDM 4 11 4 2 6 BTS FAN Module BFAN 4 11 4 2 7 Power Supply Unit PSU 4 12 4 2 8 BTS RF Fan Module BRFM 4 12 4 2 9 BTS High Power Amplifier Unit BHPA 4 13 4 2 10 BTS Transceiver Module BTRM 4 14 4 2 11 Receive LNA Distribution Unit RLDU 4 15 4 2 12 Duplexer Unit CDU DFU DDU 4 16 4 2 13 Optical Fiber Replacement 4 18 Chapter 5 C...

Page 7: ... Power Supply Unit PSU 5 7 5 9 Base station Power Lightening protection Lamp Indicator board BPLI 5 8 5 10 BTS Fan Monitor Module BFMM 5 9 Chapter 6 Switches Interfaces 6 1 6 1 BTS Control Interface Module BCIM 6 1 6 2 Receive LNA Distribution Unit RLDU 6 3 6 3 Cabinet Top E1 Interface 6 3 ...

Page 8: ...figuration Table 1 2 about antenna and feeder configuration and Figure 1 1 Figure 1 2 Figure 1 3 Figure 1 4 and Table 1 3 about cabinet configuration Table 1 1 Site configuration Items contents Remarks Site name Site Configuration Transmission Mode Cascading relation Note 1 For the Site configuration the site type and configuration mode are required to be specified for example cBTS3612 S 2 2 2 2 I...

Page 9: ...rmation in Sector 1 2 The carrier transmit power is that measured on top of the cabinet after the station is officially set up and running 3 The standing wave ratio is that measured at the RF jumper connector the end connecting to the CDU or DFU or DDU panel in the cabinet with a standing wave ratio measurer For the cabinet configuration information please specify in the relevant spaces in Figure ...

Page 10: ...Chapter 1 Daily Maintenance 1 3 be left blank Since the extension cabinet has no baseband subrack it can be ignored Additionally Table 1 3 also needs to be completed which is to make supplemental description of some of the boards or modules switch box can be ignored ...

Page 11: ...ion Chapter 1 Daily Maintenance 1 4 CDU DFU subrack RF subrack RLDU subrack Baseband subrack RF subrack basebandpart is specified in Figure 2 Power subrack Fan subrack Switch Box The baseband part is specified in Figure1 2 Figure 1 1 Basic cabinet configuration ...

Page 12: ...site Maintenance Manual Airbridge cBTS3612 CDMA Base Station Chapter 1 Daily Maintenance 1 5 0 1 2 3 4 5 6 7 8 10 11 1213 141516 1718 1920 21 9 Figure 1 2 Configuration of baseband subrack of basic cabinet ...

Page 13: ...nance 1 6 CDU DFU subrack RF subrack RLDU subrack Baseband subrack RF subrack basebandpart is specified in Figure 2 Power subrack Fan subrack Switch Box The baseband subrack of the extension cabinet has no board configuration leave it blank Figure 1 3 No 1 extension cabinet configuration ...

Page 14: ...nance 1 7 CDU DFU subrack RF subrack RLDU subrack Baseband subrack RF subrack basebandpart is specified in Figure 2 Power subrack Fan subrack Switch Box Thebaseband subrack of the extension cabinet has no board configuration leave it blank Figure 1 4 No 2 extension cabinet configuration ...

Page 15: ...plication for example which optical interfaces are used and their relations including the connection of the BTRM of extension cabinet with the BRDM of the basic cabinet RLDU Specify the location of S W switch on the panel 1 2 Maintenance Instructions The following steps are for your reference Generally step 1 2 and 3 equipment room environment check cabinet interior check and dial up test are the ...

Page 16: ... humidiometer have one installed Humidity range 5 90 Dust proof performance 1 Check if there is any visible floating dust in the equipment room 2 Open the cabinet door and check the dust filter Take measures to eliminate the dust source if the dust filter has collected too many dusts follow the instructions below to clean or change it Alarm collection device check According to the actual condition...

Page 17: ...brack 1 To judge if the parts are working properly refer to Chapter 5 Component Indicators 2 If there is anything wrong please refer to Chapter 3 Component Failure Handling for advice III Dial up test Table 1 6 Dial up test Items Instructions Caution demanding issues Dial up test around the base station 1 Conduct dial up tests on the base station in each sector or cell 2 During the dial up test mo...

Page 18: ...y there should be no PSU alarm 2 To judge whether the PSU is working properly refer to Chapter 5 Component Indicators V Lightening proof and grounding check Table 1 8 Lightening proof and grounding check Items Instructions Caution demanding issues Outdoor 1 Check if the grounding clip is connected properly w ith the grounding devices such as an iron tower outdoor cabling rack and outdoor grounding...

Page 19: ...tenna of the RF antenna and feeder is set correctly If there is a directional antenna 4 Check if the feeder connector is damaged 5 Check if the lightening arrester are damaged one is in the device box on the antenna rack the other is at the GPS interface on the top of the cabinet 1 Antenna and feeder consists of the RF antenna and feeder and satellite antenna and feeder 2 For information about the...

Page 20: ...ive the correct system message within the specific time Only after going through all these processes can the MS access the network and work properly 2 1 1 Fault Description The MS is unable to access the CDMA network after powered on 2 1 2 Troubleshooting First make sure the MS parameters such as basic frequency assistant frequency and SID NID etc have been correctly set and then go through the fo...

Page 21: ... network connection failure 1 After the BTS start up if the Abis signaling link goes wrong BSC will be unable to perform logic configuration on BTS which will result in the MS network connection failure 2 If the BTS has obtained the correct logic configuration when the Abis signaling link goes wrong the BTS will turn off the transmitting signal of the BTRM to which all its sector carrier frequenci...

Page 22: ...erhead message updated successfully that means the logic configuration for this cell has not completed 2 Sometimes the unavailability of certain physical equipment or some operation mistakes such as deleting a device by mistake will result in the cell being deleted and the MS being unable to connect to the network Check the configuration progress report for this cell in the BTS status window on th...

Page 23: ...ith the BTRM go to 3 7 BTS Transceiver Module BTRM for proper measures IV Cell is blocked If we can see from the OMC console that the logic configuration for the cell has been completed but the MS still can not connect to the network we can then check whether this cell has been blocked When a cell is blocked the BTS will turn off the transmitting signal of the BTRM to which the carrier of this cel...

Page 24: ...he response back to the MS this will result in the MS registration failure When the registration fails the MS will enter the system confirmation substate and start recapturing the network when the network is captured the MS will again activate the switch on registration this will go on and the MS is still unable to connect to the network We can use the CDMA test MS to trace the air interface messa...

Page 25: ...r proper handling measures for example if there is problem with the BTRM go to 3 7 BTS Transceiver Module BTRM for proper handling measures VI Check transmitting channel The BTRM BHPA CDU or DFU or DDU and the antenna and feeder constitute the transmitting channel The malfunctioning of transmitting channel will result in no BTS signal output or abnormal BTS signal output In such case we can still ...

Page 26: ...te in each module of the transmitting channel are secured in place l Whether the antenna is installed correctly l Whether there is a standing wave ratio alarm If there is a problem detected in a certain step refer to the relevant chapter for proper handling measures for example if there is a problem with the BTRM go to 3 7 BTS Transceiver Module BTRM for proper handling measures VII Check cell gai...

Page 27: ...console the logic configuration for the cell has been completed but the MS still can not connect to the network we can then check whether the overhead message is correct When the MS enters the idling status it needs to receive all the overhead message set up by the system which include at least the following five The synchronization message access parameter message system parameter message CDMA ch...

Page 28: ... Software download problems includes software download failure maintenance console prompting failure or there being no correct prompt messages generated 2 2 2 Troubleshooting Software download failure may be caused by the following two factors FTP client login failure and file loading abnormally terminated by the board I FTP client login failure 1 First check if the BOOTP process of the OMU is run...

Page 29: ...of these four items may lead to user login failure and software loading failure The setting of the above four items are shown below Username OMU Password OMU Access path It must include the paths specified in the software uploading and downloading commands Access authority The paths for software uploading must be set as both readable and writable II File loading terminated abnormally by the board ...

Page 30: ...lp us locate them I Link failure The precondition of successful BTS initialization is the successful establishment of ATM link between the BCIM in the BTS and the XIE board in the BSC i e the BCIM in the BTS should be able to intercept the link configuration of the XIE board in the BSC and establish the corresponding IMA UNI If the data configuration in the BSC is incorrect or relevant physical li...

Page 31: ...secure 4 Whether the number of the locked satellites is more than 4 For the above 1 and 2 please refer to 3 4 BTS Control Clock Module BCKM for handling advice for 3 please refer to 3 12 Satellite Antenna and Feeder The 4 may be affected by the geographic location if the GPS satellites are found to be less than 4 the BTS may not be able to receive reliable clock signals III Incorrect BCPM data con...

Page 32: ...nnection fault between the BRDM and BTRM you may need to refer to 3 2 Handling of Common Board Failure for proper handling measures 2 4 OML Failure 2 4 1 Fault Description After the BTS is powered on the BOOTP process fails the attempt to establish OML signaling link of the OMC fails or the OML breaks while the BTS is running We can see the alarm OML Failure from the BTS maintenance console 2 4 2 ...

Page 33: ... can acquire the IMA link set status or UNI status If there is anything abnormal in the IMA link set status or UNI status we will have to check them one by one l Whether E1 link is correct It can be checked with a loopback test l If IMA mode is used we need to f irst find out whether the multiple pairs of E1s match each other between the BTS and BSC i e the No N pair of E1s in the IMA link set at ...

Page 34: ...g table information are different Error in information configuration of any of the gateways will result in the OML establishment failure A typical example is that the BTS fails to establish the TCP connection of the OML after BOOTP request is completed successfully In such case please first check the routing information of BAM and see if it can connect to the MPU board of the switch subrack proper...

Page 35: ...n Query the BOOTP information of the BTS in the OMC and compare it with the data configuration in the BSC change those data that do not match VI Remote OMC failure The remote OMC plays a role of BOOTP Server and TCP Server during the establishment of OML Therefore the remote OMC failure will result in OML failure The possible OMC failure includes 1 BAM system collapse or BAM process not started In...

Page 36: ...normal IMA group or UNI status Please refer to 2 4 OML Failure for details II Incorrect Abis signaling link parameter configuration If the IMA link set status and the UNI status are normal and the BTS has obtained the configuration data check if the Abis signaling link configuration is correct Abis signaling link uses the IPOA mode which requires configuration of the following parameters the PVC p...

Page 37: ...site Maintenance Manual Airbridge cBTS3612 CDMA Base Station Chapter 2 General Fault Processing 2 18 III BSC failure When a BSC failure occurs the BTS will also generate a Abis signaling link failure alarm ...

Page 38: ...dule power module antenna and feeder equipment etc If something goes wrong with any of them we can check the relevant alarm boxes maintenance console and the component indicators for information about the component failure 3 1 2 General Handling Procedure When handling component failure generally we should go from outside to inside The transmission link check and GPS receiving signal check are ext...

Page 39: ... GPS signal is directed into the BCKM and processed by the clock unit after received by the GPS antenna and feeder system see 3 4 BTS Control Clock Module BCKM for details II Cabinet components First check the PSU of the power subrack and then the boards including BCIM BCKM BCPM BRDM and BTRM and finally the RF units including the BHPA CDU DFU DDU RLDU and the antenna and feeder system 1 Power sup...

Page 40: ...an the BTRM work properly Note The BTS boards have quite a lot in common therefore the problems appearing in these boards may look similar When locating the board failure you can first see 3 2 Handling of Common Board Failure for advice If the problem still cannot be solved please turn to other sections in which this board is involved 3 RF components Transmitting channel the BTRM signal is sent to...

Page 41: ...er 3 Component Failure Handling 3 4 Check the BHPA CDU or DFU DDU and RLDU and the antenna and feeder system in the transmitting and receiving channels If a problem is spotted go to the specific section in which that faulty component is described for advice and solutions ...

Page 42: ...onents l No signal detected at the optical interface l CELL BUS clock missing l Abnormally high CELL BUS subrack error rate l CELL BUS driving components failure l Board reset All the above failures will have relevant alarms generated 3 2 2 Troubleshooting I Incorrect board parameter configuration After the BOOTP request is successfully completed and the OML with the OMC is successfully establishe...

Page 43: ...tion are not configured correctly in the FTP Server In such case we have to check the above possibilities and eliminate faults one by one we can perform such operations from the OMC console For other possible failure causes and solutions we can turn to 2 2 Software Download II Board communication link failure When the board is powered on and the initialization is complete it any board other than t...

Page 44: ...the BTRM has an abnormal temperature we will have to find out if the BTS RF Fan Module BRFM is working properly If the problems sustain after we have gone through the above possibilities it should be the relevant board failure and it needs to be reset or replaced IV No signal detected at the optical interface Such problem mainly occurs in the BRDM and BTRM Here we first need to check the relevant ...

Page 45: ...lasting and have seriously impeded the BTS operation we have to find out if there are other accompanying problems and then go to the relevant sections in this chapter for handling advice and solutions or have the board reset or replaced if necessary 3 3 BTS Control Interface Module BCIM 3 3 1 Fault Description I BTS is unable to establish operation maintenance link with OMC after power on II The o...

Page 46: ... the BTS boards II BSC interface board XIE failure If E1 trunk cable is found in good connection and the connecting order is correct after the E1 loopback test there must be something wrong with the BSC interface board XIE Rest or replace the XIE III BSC and OMC failure or incorrect configuration If we find out the status of the link and the IMA link set of the BCIM are normal by querying the dedi...

Page 47: ...ts 3 4 2 Troubleshooting I Failure in establishing OML between the BTS and OMC The OMU of the BCKM is responsible for establishing OML signaling link with OMC If the link establishment fails please refer to 2 4 OML Failure for handling advice and solutions II Failure in establishing Abis signaling link between BTS and BSC The MC unit of the BCKM is responsible for establishing Abis signaling link ...

Page 48: ...aster clock unlocked etc When the above mentioned problems arise check and eliminate the satellite antenna and feeder system failure first and then reset the BCKM If the problems sustain replace that BCKM IV Other faults The power module failure in the master cabinet and the fan module failure in the baseband subrack are also reported to the BCKM and are grouped into other faults If the fan module...

Page 49: ...k error in the Channel processing Chip VI Hardware module error in the board 3 5 2 Troubleshooting I System clock error For system clock errors please refer to the 3 4 BTS Control Clock Module BCKM for handling advice and solutions II Reverse data error in the Gigabit Ethernet link For reverse data error in the Gigabit Ethernet link we need to check if the BRDM connecting to the BCPM via the backp...

Page 50: ...PGA status errors reload the FPGA software fi rst If the problem sustains it should be the hardware problem in the board Replace that faulty board IV Other faults For other faults as well as those still not solved after we going through the above steps reset the relevant BCPM first If that still does not work replace the faulty BCPM ...

Page 51: ...l IV Hardware failure of the board 3 6 2 Troubleshooting I FPGA status error For FPGA status errors reload the FPGA software first If the problem sustains it should be the hardware problem in the board Replace that faulty board II The bottom layer communication link between the BRDM and BTRM is broken If the bottom layer communication link between the BRDM and BTRM is broken it may be because the ...

Page 52: ... III Abnormal clock signal The clock signal needed by the BRDM for controlling the service switching comes from the BCKM If the problem sustains after the BCKM faults are eliminated try to load the FPGA logic configuration If that still does not work the hardware must be faulty replace that faulty BRDM IV Hardware problems in the board For hardware problems in the board all we can do is to replace...

Page 53: ...V RS485 link failure alarm VI Other faults in the BTRM Other faults in the BTRM include transmitting channel clock unlocked hardware phase lock unlocked abnormal I0 value and the digital down frequency converter failure VII BTS RF Fan Module failure RF fan module failures include the BTS Fan Monitor Module is unable to read the temperature sensor the fan is not running properly the BTS Fan Monitor...

Page 54: ...e phase lock unlocked Such problem can be solved automatically if it is not caused by hardware failure and it generally will take 5 minutes If the problem lasts for a long time follow the handling process below Go to next step if the problem cannot be solved with the current one 1 Eliminate the BRDM failure 2 Replace the relevant optical fiber 3 Replace the BTRM III Abnormal forward link power Abn...

Page 55: ...rm messages of the fan monitoring board from being reported to the BTRM and thus result in the closed loop power control failure Follow the handling process below Go to next step if the problem cannot be solved with the current one 1 Reinstall the relevant BHPA after power off then power on again 2 Replace the fan monitoring board or the relevant BTS RF Fan Module 3 Replace the BTRM 4 Replace the ...

Page 56: ...de l The fan monitoring board is unable to read the temperature sensor l The fan is not running smoothly l The fan monitoring board generates a high temperature alarm l The fan monitoring board is unable to control the fan speed Follow the handling process below Go to next step if the problem cannot be solved with the current one 1 Check if the fan cover is correctly and reliably connected 2 Repla...

Page 57: ...cable connector connection failure 1 Self protection shutdown For self protection purpose the BTS High Power Amplifier Unit will automatically shut down in case of Power Amplifier Over Excited alarm and Module Over Heated alarm a Power amplifier over excited alarm The Power Amplifier Over Excited alarm indicates the electrical level of the input RF signal of the BHPA When the electrical level of t...

Page 58: ...on threshold of the Over Heated alarm is 75âC 85âC Find out if there is a Power Amplifier Over Excited alarm or Module Over Heated alarm by querying the current alarms from the OMC or BTS local maintenance console The fault elimination process should be carried out step by step go directly to next step if the problem can not be solved l Check if the RF output power of the BTRM is too high if so de...

Page 59: ...PA must be damaged and needs to be replaced II Abnormal RF signal output The Abnormal RF signal output of the BHPA means the output power is lower than the rated value the Adjacent Channel Power Ratio ACPR of the output signal is above the acceptable level The main causes are 1 the Power Amplifier gain is decreasing 2 some of the Power Amplifier components are damaged 3 power output is too high Ab...

Page 60: ...process should be carried out step by step go directly to next step if the problem can not be solved l Check if the power output of the BHPA is too high If so decrease it l Replace the BHPA 3 9 Receive LNA Distribution Unit RLDU 3 9 1 Fault Description I Standing wave alarm of antenna and feeder II RLDU failure 3 9 2 Troubleshooting I Standing wave alarm of antenna and feeder When the antenna goes...

Page 61: ...e problem can not be solved 1 Check if the antenna and feeder are in good condition 2 Check if the CDU or DFU DDU is working properly 3 Check if the cable connecting the CDU or DFU DDU and the RLDU is in good condition 4 Check if the power indicator on the panel of the RLDU is working properly 5 Replace the RLDU II RLDU failure When there is an alarm generated on RLDU failure replace the faulty RL...

Page 62: ...odule is too low V The power module is over heated 3 10 2 Troubleshooting I The power module is not working or not working properly When the three indicators on the panel of the power module are all flashing or all gone off it indicates the power module is not working properly and there is an unexpected internal problem the module needs to be replaced II The power module fan is not running properl...

Page 63: ...overheated and stop working The alarm indicator on the module panel will be on and report an overheat alarm When the temperature decreases to an acceptable level the module will automatically start working again If the ambient temperature is OK and the module fan is running but the module is still too hot there must be something wrong with the module itself It will have to be replaced then V The v...

Page 64: ... testing the transmit power at the coupling output port of the CDU or DFU DDU panel Tx Test starting from the antenna port in the CDU or DFU DDU to the antenna in the BTS Check the following to locate the problems 1 Water infiltration in the antenna and feeder system 2 Antenna feeder and jumper damaged 3 BTS antenna and jumper disconnected or in poor contact 4 Feeder and jumper disconnected or in ...

Page 65: ... if the seal is getting loose or missing Check the following to locate the problems 1 Water infiltration in the antenna and feeder system 2 The antenna feeder and jumper are damaged 3 The lightning arrester of the satellite antenna and feeder is damaged 4 Satellite antenna and jumper connection disconnected or in poor contact 5 The feeder and jumper connection disconnected or in poor contact 6 The...

Page 66: ... is a recovery alarm 2 Version check Before replacing the board check the version of the board and its software and make notes Conduct the query again after the board is replaced and check if the version is the expected one 3 Safety precautions Boards or modules are sensitive to static electricity and can be damaged by them Therefore anti static measures must be taken when handling the board or mo...

Page 67: ...eplacing the boards of the baseband subrack we will have to block those sector carriers that would be affected during the replacement process We can unblock them after the replacement is finished If we operate directly on the BTRM power switch the block unblock operation can then be skipped 6 Common tools A crosshead screwdriver for driving M3 screws is needed when replacing the boards or modules ...

Page 68: ...handle bar with one hand and plug the board in along the guide slot Be sure to press it down to the bottom until the board surface aligns with the subrack press the upper and lower handle bars inwards to lock it up 3 Tighten the screws on the board panel 4 Resume the power supply after the board replacement is finished check the relevant indicator to see if the board is running properly V Replacem...

Page 69: ...icity from damaging the board The backplane replacement must be done with the power off and relevant operation procedures must be strictly followed Wear anti static wrist strap or gloves and connect the grounding end with the ground properly the switch housing 2 Power supply cut off Cut off the power supply for the whole BTS cabinet before doing the replacement 3 Common tools A crosshead screwdriv...

Page 70: ...do this Unscrew the bolts that fix the shielding to the cabinet Be sure to keep the bolts safe and do not let them fall into the cabinet for that may cause short circuiting II Remove the backplane 1 Loosen and remove the screws that fasten the backplane onto the cabinet Be careful to keep the screws in a safe place and not to drop the screws in the cabinet or it may cause a short circuit 2 Take th...

Page 71: ...k and screw it down tightly 2 Backplane cables Connect all the cables correctly according to the order you noted when disconnecting them 3 Backplane switch setting If there are dip switches and jumpers on the backplane set them back to the original status 4 Affix the backplane nameplate V Replacement Completed 1 Power on and off the backplane for the baseband backplane only Power on the baseband s...

Page 72: ...n Chapter 4 Component Replacement 4 7 3 Power on the boards or modules and check their working status 4 Install the metal shielding cover for baseband backplane only and the cabinet doors 5 Use a MS to have a dial up test and see if the conversation is successful ...

Page 73: ...ucture and installation position of BESP are rather different from those of the boards in the baseband subrack therefore while basically observing the 4 1 1 Board Replacement some processes such as the board removal and installation are not applicable to BESP and thus can be handled flexibly we should also pay attention to the following I The influence on the service Replacing a BESP may interrupt...

Page 74: ...nt IV Install the new BESP Install the new BESP at the top of the equipment and fasten the bolts on the four angles of the new BESP connect the trunk cables at the 25 pin interface Finally install the semi sealing cover 4 2 2 BTS Control Clock Module BCKM While basically observing the 4 1 1 Board Replacement we should also pay attention to the following I The influence on the service A BTS usually...

Page 75: ...tion to the following I The influence on the service Replacing a BCIM may interrupt all the services transmitted through it II Handling DIP switch and jumpers Before putting on the new BCIM make sure the setting of the impedance matching jumpers J6 and DIP switches S2 S9 is the same as that of the replaced board 4 2 4 BTS Channel Process Module BCPM While basically observing the 4 1 1 Board Replac...

Page 76: ...cable from the board make notes of the optical interface to which each optical fiber corresponds Connect the optical fiber cable back on the new BRDM after the replacement is finished Take caution when plugging and unplugging the optical fiber If the fiber connector has a locker tab remember to press it down when unplugging the connector 4 2 6 BTS FAN Module BFAN The physical structure of BFAN is ...

Page 77: ...g the 4 1 1 Board Replacement some processes such as the board removal installation and the MS dial up test are not applicable to PSU and thus can be handled flexibly we should also pay attention to the following I The influence on the power supply Since the PSU is configured in a n 1 backup mode when a PSU is out of service the power supply to the whole system will not be affected Thus we don t h...

Page 78: ...member to put the optical fiber in the notch in the lower right corner of the module III Handling relevant cables When detaching the BRFM remember to disconnect the cables on it make notes of the cabling destination so that the cables can be plugged back in correctly When the new BRFM is installed connect the cables on it correctly 4 2 9 BTS High Power Amplifier Unit BHPA The physical structure of...

Page 79: ...RFM for details about BRFM detachment When the BHPA is installed put the corresponding BRFM back III Installing BHPA When installing the BHPA make sure the module panel is in a seamless contact with the front edge of the subrack and then tighten the screws or the RF transmission may not be able to meet the index 4 2 10 BTS Transceiver Module BTRM While basically observing the 4 1 1 Board Replaceme...

Page 80: ... optical fiber cable back on the new BTRM after the replacement is finished Be careful when plugging and unplugging the optical fiber If the fiber connector has a locker tab remember to press it down when unplugging the connector IV Installing BTRM When installing the BTRM make sure the module panel is in a seamless contact with the front edge of the subrack and then tighten the screws or the RF t...

Page 81: ... and data cables on the panel Connect them back properly after the RLDU is installed III Installing RLDU When installing the RLDU make sure its panel is in a seamless contact with the front edge of the subrack and then tighten the screws or the RF transmission may not be able to meet the index IV Setting the switches After installing the new RLDU the S W switch setting should be the same as that o...

Page 82: ...itch box before replacing it II Handling relevant cables Before replacing the CDU disconnect the RF cable on its panel remember to make notes of the matching relation of the main diversity cables and the corresponding ports When the replacement is finished connect the cables back to the panel of the new CDU in the same way as that of the replaced unit and make sure the connectors are fixed tightly...

Page 83: ...le is OK II Plugging unplugging the optical fiber connectors Take special caution when plugging and unplugging the optical fiber If the fiber connector has a locker tab remember to press it down when unplugging the connector Before replacing the optical fiber make notes of the optical interfaces on the BRDM and BTRM to which each of the optical fiber cables correspond Connect the new optical fiber...

Page 84: ...alization or loading software Flashing slowly at 0 5Hz The BCKM is in normal operation Other The BCKM is faulty Flashing slowly at 0 5 Hz ALM Red Alarm indicator Flashing quickly at 4Hz Critical alarm Flashing slowly at 0 5Hz Major alarm Flashing slowly at 0 25Hz Minor alarm Off No alarm off ACT Green Operation indicator On The BCKM is working properly Flashing quickly at 4Hz OML failure Flashing ...

Page 85: ... The BCIM is undergoing the power on initialization or the software download Flashing slowly at 0 5Hz The BCIM is working properly Other The BCIM is not working properly Flashing slowly at 0 5Hz ALM Red Alarm indicator Flashing quickly at 4Hz Critical alarm Flashing slowly at 0 5Hz Major alarm Flashing slowly at 0 25Hz Minor alarm Off No alarm Off ACT Green Operation indicator On BCIM is working p...

Page 86: ... BCPM is undergoing the power on initialization or the software download Flashing slowly at 0 5Hz The BCPM is running properly Other The BCPM is not working properly Flashing slowly ALM Red Alarm indicator Flashing quickly at 4Hz Critical alarm Flashing slowly at 0 5Hz Major alarm Flashing slowly at 0 25Hz Minor alarm Off No alarm Off ACT Green Operation indicator On The BCPM is working properly F...

Page 87: ...e BRDM is undergoing the power on initialization or the software download Flashing slowly at 0 5Hz The BRDM is working properly Other The BRDM is not working properly Flashing slowly at 0 5Hz ALM Red Alarm indicator Flashing quickly at 4Hz Critical alarm Flashing slowly at 0 5Hz Major alarm Flashing slowly at 0 25Hz Minor alarm Off No alarm Off ACT Green Operation indicator On BRDM is working prop...

Page 88: ...ly at 4Hz The BTRM is undergoing the power on initialization or the software download Flashing slowly at 0 5Hz The BTRM is working properly Other The board is not working properly Flashing slowly at 0 5Hz ALM Red Alarm indicator Flashing quickly at 4Hz Critical alarm Flashing slowly at 0 5Hz Major alarm Flashing slowly at 0 25Hz Minor alarm Off No alarm Off ACT Green Operation indicator On BTRM is...

Page 89: ... working properly Flashing quickly at 4Hz BTRM has not been power on or is in the Critical alarm status Flashing slowly at 0 5Hz The BTRM is on but in a major alarm status Flashing slowly at 0 25Hz The BTRM is on but in a minor alarm status Off Communication between the BTRM and the fan monitoring board is broken On HPA Green BHPA status indicator On The BHPA is running properly Flashing quickly a...

Page 90: ...indicator On Normal Off Abnormal On 5 8 Power Supply Unit PSU For details about the PSU indicators please see Table 5 8 Table 5 8 Description of PSU indicators Indicator Color Meaning Description Normal Status Vin Green Power input status indicator On Normal Off Abnormal On Alm Red Module fault indicator On Alarm Off Normal Off Vo Green Power output indicator On Normal Off Abnormal On Note Possibl...

Page 91: ...ils about the BPLI indicators please see Table 5 9 Table 5 9 Description of BPLI indicators Indicator Color Meaning Description Normal Status RUN Green 48V power indicator On The power supply is normal Off The power supply is abnormal On L alm Red Lightening arrester indicator On The lightening arrester is not working properly Off The lightening arrester is working properly Off ...

Page 92: ...ning Description Normal Status BFMM Indicators Green Operational status indicator Flashing quickly at 4Hz the monitored target is running out of order such as the fan failure serial port communication failure and the driving monostable circuit failure etc Flashing slowly at 0 5Hz Both the fan monitoring circuit and the monitored target are working properly On or off The controlling chip of the BTS...

Page 93: ...BTS Control Interface Module BCIM The DIP switch and jumpers of the BCIM are shown in Figure 6 1 S5 ON 1 2 3 4 S3 ON 1 2 3 4 S9 ON 1 2 3 4 S7 ON 1 2 3 4 S4 ON 1 2 3 4 S2 ON 1 2 3 4 S8 ON 1 2 3 4 S6 ON 1 2 3 4 J6 1 2 3 Figure 6 1 DIP switch and jumpers of BCIM For details about BCIM DIP switch and jumper settings please see Table 6 1 ...

Page 94: ...tch are all set at on position 75Ù coaxial cable with the coating connected to the PGND The No 1 2 of the DIP switch are all set at on position No 3 4at off position 75Ù coaxial cable the coating is not connected to the PGND The DIP switch position other than the above mentioned is not defined J6 Feedback of the Impedance mode 75Ù 120Ù for E1 interface the program will initiate the E1 chip accordi...

Page 95: ...h 2 CDUsor 1 CDU 1 DFU S W set to 1 The carrier number of each sector is less than or equal to 2 and each sector is equipped with 1 CDU or 1 DFU or 1 DDU 6 3 Cabinet Top E1 Interface I Description of cabinet top E1 interface Two transmission cables corresponding to two BCIMs each containing 8 E1 trunk cables which is numbered individually run from the backplane of the baseband subrack to the cabin...

Page 96: ...ce we should have a clear idea which DB25 connector is being used Incorrect cable connection will result in communication failure When the number of the E1 trunk cables actually used is less than 4 generally we should use the first DB25 connector of the front BESP viewing from cabinet front When the number of the E1 trunk cables actually used is greater than 4 we should pick up the DB25 connectors...

Page 97: ...On site Maintenance Manual Airbridge cBTS3612 CDMA Base Station Table of contents i Table of Contents Appendix A Common Commands A 1 Appendix B Abbreviation B 1 ...

Page 98: ...BTS Resource Pool ADD BTSGENBRD Add General Board of BTS ADD BTSLNK Add BTS Transmission Link ADD BTSLNKGRP Add BTS Transmission Link Group ADD BTSTERTRFLNK Add BTS Terrestrial Traffic Link CLR BTSCFG Clear the current configuration data of the BTS CLR BTSMLTDRPLNK Clear BTS Trunk Transmission Link DSP BTSCFG Display Configuration Commands RMV BTSBCPM RemoveBTS BCPM RMV BTSBTRM RemoveBTS BTRM RMV ...

Page 99: ... DSP BTSENEVPARA Display BTS Environment Temperature Humidity DSP BTSFRMSTAT Display BTS Baseband Subrack Status DSP BTSPOWERPARA Display BTS Power Supply Module Parameters DSP BTSWARNTHD Display Alarm Thresholds LST CURALM List BTS Current Alarm LST HISALM List BTS History Alarm RST BTSBRD Reset BTS Board RST BTSENVBOX Reset Environment Alarm Box SET BTSENEVPORT Set Port Status of Monitor SET BTS...

Page 100: ...tor Module BHPA BTS High Power Amplifier Unit CBMS CDMA BSC Basic Management Subrack BPLI Base station Power Lighting protection lamp Indicator board BRDM BTS Resource Distribution Module BRFM BTS RF Fan Module BS Base Station BSC Base Station Controller BSS Base Station Subsystem BTRM BTS Transceiver Module BTS Base Transceiver Station CDMA Code Division Multiple Access CDU Combining Duplexing Un...

Page 101: ...e MML Man Machine Language Modem Modulator Demodulator MPU Micro Process Unit MS Mobile Station NID Network Identification OMC Operation Maintenance Center OML Operation Maintenance Link OMU Operation Maintenance Unit PSU Power Supply Unit PVC Permanent Virtual Channel PVP Permanent Virtual Path RLDU Receive LNA Distribution Unit RST Reset SID System Identification TCP Transport Control Protocol U...

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