203105328 10 cdma btstroubleshooting

8/18/2019 203105328 10 CDMA BTSTroubleshooting

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HUAWEI TECHNOLOGIES CO., LTD. All rights reserved

www.huawei.com

Internal

OR044 CDMA BTS3606ETroubleshooting

ISSUE 1.0

HUAWEI TECHNOLOGIES CO., LTD. Page 2All rights reserved

References

BTS3606E Technical Manual

BTS3606E Hardware Description Manual

BTS3606E Maintenance Guide


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Upon completion of this course, you will be able to:

Login in to the BTS in Telnet or LMT mode

Query the BTS alarms

Trace the power and RSSI , and locate the RF problem

Test the link quality of the Abis interface

Replace the BCKM, BCIM , CCPM, TRM and CDDU boards


Chapter 1 Logging in to the BTSChapter 1 Logging in to the BTS

Chapter 2 Troubleshooting CasesChapter 2 Troubleshooting Cases


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Chapter 1Chapter 1 Logging in to the BTSLogging in to the BTS

1.1 Maintenance Mode1.1 Maintenance Mode

1.2 Logging into the BTS1.2 Logging into the BTS


Local Maintenance Software

LMT Software

Used to maintain the whole BSS

Started through the workstation (WS)

of the M2000 or BAM.

Telnet Software

Used to maintain a single BTS

Used when :

− LMT software is unavailable.

− Special test operations are required


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Chapter 1Chapter 1 Logging in to the BTSLogging in to the BTS

1.1 Maintenance Mode1.1 Maintenance Mode

1.2 Logging into the BTS1.2 Logging into the BTS


Logging in to the BTS

Physical connections:

Logging in to the BTS Remotely in the LMT Mode

LMT BAM BSC/RAC BTS3606-1192.168.*.* 10.12.3.128 129.*.10.1 129.*.10.*192.168.*.* 10.12.3.*

129.*.10.*

BTS3606-2


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Operation Procedure

Step 1 Select Start > Programs > iManager M2000 > LocalWS.The Local NE Management System dialog box appears.

Step 2 Click Configure to add the IP address of the BAM.

Step 3 Select the BAM that is to be logged in to. The systemstarts the service maintenance system and the User Login dialogbox appears.

Step 4 Enter the valid user name and password.

Step 5 Click OK.

-End

Logging in to the BTS Remotely in the LMT Mode



Physical connections

Logging in to the BTS Locally in the LMT Mode

LMT BAMBSC/RACBTS3606-110.12.3.*129.*.10.*172.16.16.16172.16.*.* 129.*.10.1 10.12.3.128

BTS3606-2


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Operation Procedure

Step 1 At the WS of the BAM side, execute the command STRCBTSRVSMNT to start the reverse maintenance.

Step 2 At the WS of the BAM side, add the WS and set thecommand authority for the WS at the BCKM side.

Step 3 At the WS of the BCKM side, run the near-end NEmanagement system or LMT software to log in to the BTS. TheBAM IP address that you set when logging into the BAM mustbe the IP address (172.16.16.16) of the BCKM Ethernet port .

Step 4 After the maintenance is complete, execute the commandSTP CBTSRVSMNT to stop the reverse maintenance.

----End

Logging in to the BTS Locally in the LMT Mode


Logging in to the BTSLMT Interface


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Physical connection

Logging in to the BTS Locally in Telnet Mode

LMT BTS3606-1172.16.16.16172.16.*.*



Operation ProcedureStep 1 Use crossover cables to connect the portable computer and theBCKM Ethernet port.Step 2 Start the Telnet client and use the following username andpassword to log in to the OMU:

− Username: system− Initial password: system

Step 3 Execute the command opnday to enable type-ahead function.

Step 4 Execute the MML commands in the Telnet window to maintainthe BTS.Step 5 After the maintenance is complete, close the Telnet window.

----End

Logging in to the BTS Locally in Telnet Mode


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Physical connections

Logging in to the BTS Remotely in the Telnet Mode

LMT BAM BSC/RAC BTS3606192.168.*.* 10.12.3.128 129.*.10.1 129.*.10.*192.168.*.* 10.12.3.*



Operation ProcedureStep 1 In the service maintenance system, execute the command STRBTSTELPROXY to enable a Telnet agent for the BTS to be maintained.Step 2 In the Run dialog box, execute the command telnet: hostname port.

− The hostname refers to the IP address of the BAM. The port refers to theport number set in step 1.

Step 3 After the Telnet is connected to the BCKM, use the following user nameand password to log in to the BTS:

− Username: system

− Initial password: system

Step 4 Execute the MML commands in the Telnet window to maintain the BTS.Step 5 After the maintenance is complete, close the Telnet window.Step 6 In the service maintenance system, execute the command STPBTSTELPROXY to stop the BTS Telnet agent.

-End

Logging in to the BTS Remotely in the Telnet Mode


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Questions

How to login in to the BTS in the local LMT mode?

How to login in to the BTS in the local telnet mode?

What is the difference between the LMT and the telnet mode?


Chapter 1 Logging in to the BTSChapter 1 Logging in to the BTS

Chapter 2 Troubleshooting CasesChapter 2 Troubleshooting Cases


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Fault Locating

Software fault

− Data configuration fault

− Not matchable version of software or data configuration file

− Program run error

Hardware fault

− Transmission or clock fault

− Board damage (replace the damaged one with a board of the

same software and hardware version and conduct test)

− Backplane slot fault: Select another slot and conduct test

(modify the corresponding data)

When the running state of the system is abnormal, consider the

following factors:


Operation & Maintenance ProcessCommon maintenance process of BSS system:

Obtain systemrunning

information

Judge systemrunning state

Handling

View alarminformation

Viewindicators

View traffic

statisticsSubscribercomplaint

Alarmanalysis

Trafficstatisticsanalysis

Faultjudgment

Check line

Adjustparameters

Reset board

Replace parts


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Common Troubleshooting Procedure

There are currentalarms

Query currentBTS alarm

Clear currentalarms

Take measures tosolve the problem

END

N

Y

START

Judge the type ofproblem through the

symptoms

Any other currentalarms YN

• LST ALMFE to querycurrent alarms

• Clear the alarmsaccording to thesuggestions in alarmmanagement system

• Power supply andenvironment monitoring faults

• Clock system faults• Abis interface faults• RF system faults

• Clear the alarmsaccording to thefollowingtroubleshooting guide


Power Supply Faults Power Supply Faults

Clock System Fault

Abis Interface Fault

RF System Fault

Basic Troubleshooting Considerations


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Power Supply Fault - Mains Phase Loss

Symptom:

The BTS reports “Power Supply Alarm”. The alarm description is “The ACpower loses phases”.

Troubleshooting:

Power switches on

On site powersupply normal

Check the power switches

Check power supply on site

Turn power switches on

Power Supplyalarm solved

END

N

Y

Correct connections

Power supplyconnections ok

Check power supplyconnections

Correct powermaintenance engineers

to solve the problem

Y

N

YN

• AC/DC power subrackpower switches on

• SPARE switches on • Power supply of thesite cut off

• Use multimeter tomeasure the voltage • Check

connectionsof powercables in thelighteningprotection andfiltering unit


Power Supply Fault - PSU AC/DC Fault

Symptom:

The BTS BTS3606A reports the “PSU AC/DC Alarm”.

Troubleshooting:

PSU faulty

On site powersupply normal

Check the PSU

Check power supply on site

Modifyconfiguration

Power Supplyalarm solved

END

NY

Correct connections

Power supplyconnections ok

Check power supplyconnections

Correct powermaintenance engineers

to solve the problem

Y

N

YN• DSP CBTSPMUPSU to

check whether thePSUAC/DC number isconsistent with itsphysical location

Configuration ok

Check PSU configuration

NY

Replacefaulty PSU


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Power Supply Faults

Clock System Fault Clock System Fault


RF System Fault



Clock System Fault – Satellite Antenna Fault

Symptom:

The BTS reports the alarm “BCKM Satellite Antenna System Faulty”. Thealarm description is “The satellite antennas are open-circuited and satellitesignals are weak”, or “Antenna connection short”.

Troubleshooting:

Alarm cleared

It is normal

Short circuit thelightning arrestor

Check output voltageof satellite receiver

END

Y

N

• If connectors rusted by water• If the lightning arrester is

inversely connected.• If the lightning arrester is faulty

N

Troubleshoot thelightning arrestor N

Check the connections ofGPS antenna

Cables intact

Y

Replace thesatellite receiver

Replace the GPSantenna

Replace the feederor jumper

Y

• Remove connector for “ANT” port onthe BCKM

• Measure the voltage output by theGPS satellite receiver to the GPSantenna using a multimeter >= largerthan 4.8 V.

• Insulation and shortcircuit

• Conductor of the feederis broken

• Check the white shortcable between the GPSreceiver and BCKMpanel


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Clock System Fault – Insufficient satellites

Symptom:

BTS reports the alarm “BCKM Satellite Antenna System Faulty”. The alarmdescription is “Insufficient satellites being tracked”.

Troubleshooting:

Preset GPS coordinatediffer from actual

Query the BCKMspecial board status

END

Y

N

Set the actualposition of BTS

• DSPCBTSBRDSPECSTAT toquery the BCKM specialstatuses.

Relocate GPSantenna

• SET CBTSINITPOS to setthe position information forfaster tracking

• Relocate the GPSantenna based onstandard

• Middle of rooftop• No obstacles

within 90 degrees


Power Supply Faults

Clock System Fault

Abis Abis Interface Fault Interface Fault

RF System Fault



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Abis Interface Fault – Link Fault

Symptom:

The BTS reports E1/T1 alarms, such as “BTS E1/T1 Link Faulty” or “BSCE1/T1 Link Faulty”.

Troubleshooting:

Power supply ortransmission equipment

faulty

Check Power supplyand transmission

equipment

END

Y

N

Troubleshoot andclear this fault

• DSP CBTSTSTTSK to query whetherthe E1/T1 port at the BTS side is i nthe loopback test or link test status

• LST LOG• DSP FELNK, DSP PPPLNK, DSP

MLPPPLNK

Check E1 status

E1 in loopback status

Y

Stop loopback

N

Loopback section bysection to locate fault

• STP CBTSTSTTSKto stop the test

• SET LPBACKE1T1to stop the loop

• The board involved with thetransmission link is faulty.

• The connector is in poorconnection.

• The cable is damaged


Abis Interface Fault – Unstable Link Fault

Symptom:

The BTS frequently reports the alarm “E1/T1 Bit Error Rate Too High”.

The transmission link is often temporarily interrupted and then recovered.

The link status query result contains the exceptional statuses such as theframe or multi-frame out-of-synchronization.

Troubleshooting:

Transmissionequipment faulty

Check transmissionequipment

END

Y

N

Troubleshoot and

clear this fault

Check DIP switches ofBCIM and BESP

DIP switch ok

N

Correct DIP switch

Y

Change grounding orE1 connectors

• All ON for 75ohm

Check grounding of DDFand E1 connectors

Meet requirementsLoopback section bysection to locate fault

NY


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Abis Interface Fault – O&M Fault

Symptom:

The LMT cannot send O&M commands to the BTS successfully. The statusof the BTS is offline.

Troubleshooting:

Link consistent withphysical connection

Routes are correct

Query E1 links status

Query the IP route inthe BAM and CSWS

Correct the configuration

Ping the BTS IP addressfrom BAM

END

N

Y

• LST CBTSLNK

• Ping the IP address to checkwhether the communicationbetween BAM and CMPU isnormal. C:\>ping 10.12.3.64

N

Correct the routing

Query E1 links configuredto BTS

DSP FELNKDSP MLPPPLNK

• C:\>route print. Result shouldhave route to the CMPU for129.x.x.x IP segments

• LST SWIPRT. Result shouldhave route to CMUX of CIPSfor 129.x.x.x IP segments

• C:\>route –p add 129.x.x.xmask 255.255.255.010.12.3.64

• ADD SWIPRT

Y

• LST BTS• LST IPOAPVC to

query IPoAinformation

• DSP BTSBTPINFO• LST FRMPRTMAP• Ensure all

parameters match

Query IPOA dataconfiguration andBootP configuration

Configurations areconsistent

Y


N


Abis Interface Fault – Signaling Fault

Symptom:

The BSC reports the alarm “Abis Signaling Link Disconnected”.

Troubleshooting:


Routes are correct


Query the IP route inthe BAM and CSWS


Alarm cleared

END

NY

• LST CBTSLNK

N

Correct the routing

Query E1 links configuredto BTS

• C:\>route print. Result shouldhave route to the CMPU for80.x.x.x IP segments

• LST SWIPRT. Result shouldhave route to CMUX of CIPSfor 80.x.x.x IP segments

• C:\>route –p add 80.x.x.xmask 255.255.255.010.12.3.64

• ADD SWIPRT

Y

• DSP CBTSIFCFG toquery BTS interfaceconfiguration

• LST IPOAPVC toquery IPoAinformation

• Ensure allparameters match

Query IPOA dataconfiguration

Configurations are

consistentY

N

• RMV CBTSTERSIGLNK• ADD CBTSTERSIGLNK

Correct theconfiguration

BSC or BTSboard faulty

• CSPU, CRMU• BCKM



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Abis Interface Fault – Traffic Fault

Symptom:

The BTS reports the alarm “No Traffic Link Exist”.

Troubleshooting:


Configurations ok


Query the trafficconfigurations


END

NY

• LST CBTSLNKQuery E1 links configured

to BTS

• DSP CBTSIFCFG• LST BTSLNK

YN

• RMV CBTSTERTRFLNK• ADD CBTSTERTRFLNK

Correct theconfiguration

BSC or BTSboard faulty

• CFMR• CCPM

Alarm cleared



Power Supply Faults

Clock System Fault


RF System Fault RF System Fault



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RF System Fault – Insufficient Forward Power

Symptom:

The network signal received by handsets is rather weak. It is easy to causecall-drops. The BTS coverage area shrinks.

Troubleshooting:

VSWR normal Result okTrace thetransmit power

Check antenna systemand correct fault

END

NY

• Sitemaster• Result


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Summary


Maintenance

Troubleshooting skills

www.huawei.com

Thank You

203105328 10 cdma btstroubleshooting

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