rnc operation and maintenance
DESCRIPTION
O&MTRANSCRIPT
UTRAN Trainning – Operation and Maintenances 2012
BSC6900 1
General Introduction to
BSC 6900 Operation and
Maintenance
UTRAN Trainning – Operation and Maintenances 2012
BSC6900 2
REFERENCES
• BSC6900 GU LMT User Guide
Page3
OBJECTIVES
• Upon completion of this course, you will be able to:
– Detail the structure of operation and maintenance subsystem
– Perform the BSC6900 routine operation
– Perform the BSC6900 routine maintenance
Page4
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BSC6900 3
CONTENTS
1. OM System Introduction
2. Operation Right Management
3. Alarm management
4. Log management
5. Device panel management
6. BSC maintenance
7. Routine MML commands
8. Trace management
9. Performance monitoring
10. Board Replacement
11. Transmission Detection
Page5
CONTENTS
1. OM System Introduction
1.1 OM Network Introduction
1.2 Web LMT Introduction
1.3 LMT Offline Tool
Page6
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BSC6900 4
O&M NETWORK
Page7
Unified WEB LMT for
GSM&UMTS
SRAN O&M Network
GSM BTS
BSC6900
UMTS NodeB MBTS(GSM/UMTS)
Unified M2000/CME Client for GSM&UMTS
TM
M2000
Pa
ge
8
SYSTEM OVERVIEW
UTRAN Trainning – Operation and Maintenances 2012
BSC6900 5
Pa
ge
9
LMT LOGIN
OMU external virtual IP
Pa
ge
10
WEB LMT INTRODUCTION
• The LMT provides graphical user interface (GUI) for you to operate and maintain the BSC6900 on the Web page.
• The alarm management, trace management, performance monitoring, and device maintenance can be performed through menu operations
• The MML commands can be run for data configuration and O&M on the LMT
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BSC6900 6
COMPONENTS OF WEB LMT
Page11
Navigation
Tree
Processin
g Area
Functional Tab
Command Area
RUNNING AN MML COMMAND
Page12
1 2 3
4
5 6 7
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BSC6900 7
BATCH RUNNING MML COMMANDS
Page13
QUERYING THE DATA CONFIGURATION MODE AND DATA CONFIGURATION RIGHTS
Page14
• Querying the data configuration mode
• Querying data configuration rights
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BSC6900 8
LMT OFFLINE TOOL
Page15
• The Local Maintenance Terminal (LMT) software consists of:
– FTP Client
– FTP Server
– Convert Management System
– Performance Browser Tool
– Traffic Recording Review
QUESTIONS
Page16
• There are two modes the data configuration: effective mode and non- effective mode, describe what the difference between these two modes, and which command is used to change the data configuration mode?
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BSC6900 9
CONTENTS
Page17
1. OM System Introduction
2. Operation Right Management
3. Alarm management
4. Log management
5. Device panel management
6. BSC maintenance
7. Routine MML commands
8. Trace management
9. Performance monitoring
10. Board Replacement
11. Transmission Detection
CONTENTS
2. Operation Right Management
2.1 Basic Concepts
2.2 Management of User Accounts
2.3 Management of Command Groups
Page18
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BSC6900 10
USER TYPES
Page19
• Local user – Being created and authorized by MBSC LMT
– The internal operator is admin, and the default password is 11111111
– The external operators are divided into five levels. Each level has different authorities
• EMS user – Being created, managed and authorized by
M2000
– The authorized EMS users can also log in to the
M2000 server through the M2000 client for
BSC6900 operations.
COMMAND GROUP
Page20
• The BSC6900 system uses 32 command groups (G_0 to G_31) to manage commands. Different command groups can be assigned to different operators, so that they will have different operation authorities.
– Groups G_0 to G_14 are predefined by the system, the contents cannot be changed
– Groups G_15 to G_31 are initially null, the contents can be defined.
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BSC6900 11
OPERATION RIGHTS
Page21
Operator level Authorized command
group Authority Remarks
ADMINISTRATOR G_0 - G_14 All authorities
The authorities are
predefined by the
system and cannot be
changed.
OPERATOR G_0, G_2 - G_14
Authorities of
USER-level operator
Data configuration
USER
G_0, G_2, G_4, G_6 - G_14
Authority of
GUEST-level
operator
System O&M
GUEST G_0, G_2, G_4, G_6, G_8,
G_13 Data query
CUSTOM
Command groups will be
assigned to the account when it
is added.
The authority will be
specified during
account addition
Changeable; different
CUSTOM-level
operators can have
different authorities.
MANAGEMENT OF USER ACCOUNTS
Page22
• Creating an External User Account: ADD OP
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BSC6900 12
MANAGEMENT OF USER ACCOUNTS
Page23
• Changing the Password of the Active User Account
• Setting Password Policy: SET PWDPOLICY
MANAGEMENT OF COMMAND GROUPS
Page24
• Querying a Command Group: LST CCG
• Adding Commands to Command Group: ADD CCG
• Listing Command Groups of Operator Levels: LST OPCG
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BSC6900 13
QUESTIONS
Page25
• When a user account is created, what is the meaning of week limit, and time limit?
• How many types of external user account supported by BSC6900, and please describe the different function of every user account in different level?
CONTENTS
Page26
1. OM System Introduction
2. Operation Right Management
3. Alarm management
4. Log management
5. Device panel management
6. BSC maintenance
7. Routine MML commands
8. Trace management
9. Performance monitoring
10. Board Replacement
11. Transmission Detection
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BSC6900 14
CONTENTS
3. Alarm Management
3.1 Basic Concepts
3.2 Monitoring Alarms
3.3 Managing the Shielded Alarm
3.4 Managing the Alarm Logs
Page27
ALARM CLASSIFICATION
Page28
Alarm Type
Fault alarm
Event alarm
The fault alarm
Classification
Cleared alarm
Active alarm
Alarm Severity
Critical alarm
Major alarm
Minor alarm
Warning alarm
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BSC6900 15
ALARM BOX
Page29
• BSC6900 uses the Huawei universal alarm box. The BSC6900 alarm box provides audible and visual indications based on the alarm severity. It is optional and the BSC6900 can be configured with only one alarm box.
MONITORING ALARMS
Page30
Browsing Alarms
Querying and
Modifying the Alarm
Configuration
Filtering Fault
Alarm
Monitoring Alarms
Querying Alarm
Handling
Suggestions
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BSC6900 16
MANAGING THE SHIELDED ALARM
Page31
Listing Shield of
Alarm Object
Setting Alarm
Shield Flag
Managing the
Shielded Alarm
Adding
Shield of
Alarm
Object
MANAGING THE ALARM LOGS
Page32
Setting Storage
Conditions of
Alarm Logs
Querying Storage
Conditions of
Alarm Logs
Managing the
Alarm Logs
Querying
the Alarm
Logs
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BSC6900 17
QUESTIONS
Page33
• If there is an alarm which is useless for the system, how can we shield it? If we shield this alarm, can we query it on LMT?
• What is the difference between shielded alarm and cleared alarm?
• What is the maximum number and time limitations of alarm logs that can be stored in the OMU database
CONTENTS
Page34
1. OM System Introduction
2. Operation Right Management
3. Alarm management
4. Log management
5. Device panel management
6. BSC maintenance
7. Routine MML commands
8. Trace management
9. Performance monitoring
10. Board Replacement
11. Transmission Detection
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BSC6900 18
CONTENTS
4. Alarm Management
4.1 Basic Concepts
4.2 Querying Logs
4.3 Log Storage Conditions Management
Page35
LOG TYPES
Page36
• Operation log:
– The operation log refers to all the real-time operation
information recorded in the OMU database
• Security log:
– The security log refers to the NE or EMS information
related to security events such as login, logout, and
authorization
• Running log:
– The running log refers to the system running
information of the host recording in real time
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BSC6900 19
QUERYING LOGS
Page37
• Querying Operation Logs: LST OPTLOG
• Querying Security Logs: LST SECLOG
LOG STORAGE CONDITIONS MANAGEMENT
Page38
•Querying Log Storage Conditions
•LST LOGLIMIT
•Setting Log Storage Conditions
•SET LOGLIMIT
Log Storage
Conditions
Management
•Exporting Logs
•EXP LOG
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BSC6900 20
QUESTIONS
Page39
• If the number of logs exceeds the set count limit, what will happen?
• What is the function of COL LOG, and how to get path the log result?
• After log exported, what kind of methods could we use to download the log files, what is the difference ?
Please read the Chapter 4 in BSC6900 O&M Student
Book to get all the answers of these questions
CONTENTS
Page40
1. OM System Introduction
2. Operation Right Management
3. Alarm management
4. Log management
5. Device panel management
6. BSC maintenance
7. Routine MML commands
8. Trace management
9. Performance monitoring
10. Board Replacement
11. Transmission Detection
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BSC6900 21
CONTENTS
5. Device panel management
5.1 Basic Concepts
5.2 Device Panel Operations
5.3 Emulation Panel Operations
Page41
INTRODUCTION TO THE DEVICE PANEL
Page42
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BSC6900 22
INTRODUCTION TO THE EMULATION PANEL
Page43
Double-click the peripheral of the displayed device panel
DEVICE PANEL OPERATIONS
Page44
• Querying the Status of an E1/T1 Port
• Querying the CPU Usage
• Querying the BSC Board Clock Status
• Querying the BSC Board Information
• Resetting the BSC Board
• Switching Over the BSC Boards
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BSC6900 23
EMULATION PANEL OPERATIONS
Page45
• Querying the Status of an FE Port
• Querying the Status of an GE Port
• Querying the Status of an Optical Port
• Querying the DSP Status of a DPU
• Querying Alarm LED Information
QUESTIONS
Page46
• How can we distinguish the different interface boards with the same physical boards by querying device panel?
• What is the different clock status when you querying on a normal GCUa and SCUa?
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BSC6900 24
CONTENTS
1. OM System Introduction
2. Operation Right Management
3. Alarm management
4. Log management
5. Device panel management
6. BSC maintenance
7. Routine MML commands
8. Trace management
9. Performance monitoring
10. Board Replacement
11. Transmission Detection
Page47
CONTENTS
6. Device panel management
6.1 Basic Concepts
6.2 Maintaining the Equipment
6.3 Maintaining Transmission and Signaling
6.4 Maintaining BSC User Resources
Page48
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BSC6900 25
BSC INTERFACE PROCESSING SUBSYSTEM
Page49
• The BSC interface processing subsystem consists of the following logical units:
LOOPBACK MODE
Page50
Timeslot Loopback
Loopback Mode
Port Loopback
Remote speech
channel loopback DSP speech
channel loopback
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BSC6900 26
TIMESLOT LOOPBACK
Page51
• You can set the loopback direction by selecting a loopback mode. By doing this, you can analyze whether the fault is on the system side or on the transmission lines or whether it is a transmission problem or software problem.
– Remote loopback
– Local loopback
PORT LOOPBACK
Page52
• Port loopback is used to loop back the data received or transmitted by the port in the specified direction. You can perform the port loopback to locate a fault of a link disconnection, and link intermittence problem.
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BSC6900 27
PORT/TIMESLOT LOOPBACK RESULT LIST
Page53
Loopback Mode/Terminal A (Served by Local BSC) B (Served by Another BSC)
A interface Local Loopback can hear A cannot hear A
A interface Remote Loopback can hear B can hear B
ABIS interface Local Loopback cannot hear B can hear B
ABIS interface Remote
Loopback can hear A can hear A
ATER interface Local
Loopback in BM can hear A cannot hear A
ATER interface Remote
Loopback in BM can hear B can hear B
ATER interface Local
Loopback in TC cannot hear B can hear B
ATER interface Remote
Loopback in TC can hear A can hear A
QUESTIONS
Page54
• If this situation happens in network testing, which kinds of boards you should check in BSC6900 system in order to eliminate the hardware faulty?
Loopback Mode/Terminal A (Served by Local BSC) B (Served by Another BSC)
A interface Local Loopback cannot hear A cannot hear A
A interface Remote
Loopback cannot hear B can hear B
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BSC6900 28
REMOTE SPEECH CHANNEL LOOPBACK
Page55
A interface
to MSC
A interface
to MS
GMPS/GEPS GTCS
E
I
U
a
T
N
U
a
E
I
U
a
D
P
U
c
E
I
U
a
E
I
U
a
T
N
U
a Afer
MS A BTS
MSC Fix Phone B
GMPS/GEPS GTCS
E
I
U
a
T
N
U
a
E
I
U
a
D
P
U
c
E
I
U
a
E
I
U
a
T
N
U
a Afer
MS A BTS
MSC Fix Phone B
DSP CHANNELS/LINKS LOOPBACK
Page56
A Interface
Abis Interface
GMPS/GEPS GTCS
E
I
U
a
T
N
U
a
E
I
U
a
D
P
U
c
E
I
U
a
E
I
U
a
T
N
U
a Afer
MS A BTS
MSC Fix Phone B
GMPS/GEPS GTCS
E
I
U
a
T
N
U
a
E
I
U
a
D
P
U
c
E
I
U
a
E
I
U
a
T
N
U
a Afer
MS A BTS
MSC Fix Phone B
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BSC6900 29
BROWSING CONFIGURATION DATA
Page57
• Browse the configuration data, including the configuration data of BSCs, BTSs, TRXs, and channels.
Browse All/Save as
MAINTAINING DEVICE
Page58
• Querying the BSC Board Information
• Querying BSC Board Clock Status
• Switching over the BSC Boards
• Resetting the BSC Board
• Maintaining Fan Box
• Maintaining the Power Distribution Box
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BSC6900 30
MAINTAINING TRANSMISSION AND SIGNALING
Page59
Maintaining LAPD Link
Querying Ater Link Status
Maintaining SCCP Links
Maintaining MTP3 Links
Querying the Status of MTP2
Links
…
Querying the Interface Board
Port Information
Looping Back the Interface
Board Port/Timeslot
Maintain IP links
… Maintaining Signaling Maintaining Transmission
MAINTAINING BSC USER RESOURCES
Page60
• Maintain Interface Resource
• Querying the Status of the Abis Interface Timeslot
• Maintaining Ater Interface Resources
• Maintaining the Circuits on the A Interface
Maintaining
BSC User
Resources
• Loopback
• Looping Back Remote Speech Channel
• Testing the Internal Speech Channel
• Looping Back DSP Path/Lin
• Maintain User Resource
• Querying DSP Resources
• Maintenance DSP resource
• Querying Single User Resources
•Collecting BSC Local Information
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BSC6900 31
QUESTIONS
Page61
• If the circuits in A interface are blocked, what will happen to the ongoing calls, and which command is used to block the circuits in A interface?
• When querying the status of MTP2 links, what is the normal status, and if the transmission link of the MTP2 links is faulty, what is the status of the MTP2 links?
CONTENTS
1. OM System Introduction
2. Operation Right Management
3. Alarm management
4. Log management
5. Device panel management
6. BSC maintenance
7. Routine MML commands
8. Trace management
9. Performance monitoring
10. Board Replacement
11. Transmission Detection
Page62
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BSC6900 32
CONTENTS
7. Routine MML commands
7.1 Routine Maintenance MML_Iub
7.2 Routine Maintenance MML_IuCS
7.3 Routine Maintenance MML_IuPS
Page63
PROTOCOL STRUCTURE FOR THE IUB INTERFACE (OVER ATM)
Page64
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BSC6900 33
PROTOCOL STRUCTURE FOR THE IUB INTERFACE (OVER IP)
Page65
ROUTINE MAINTENANCE MML FOR THE IUB INTERFACE
Page66
• Checking the Transmission Link:
– DSP E1T1, DSP OPT (Over ATM)
– DSP ETHPORT (Over IP)
• Checking the Signaling link:
– DSP SAALLNK (Over ATM)
– DSP SCTPLNK (Over IP)
• Checking the status of the NCP link and the CCP links of a NodeB: DSP
UIUBCP
• Checking the status of the adjacent node: DSP ADJNODE
• Checking the status of the AAL2/IP path
– DSP AAL2PATH ( Over ATM )
– DSP IPPATH ( Over IP )
• Checking the cell status: DSP UCELL
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BSC6900 34
PROTOCOL STRUCTURE FOR THE IUCS INTERFACE (OVER ATM)
Page67
PROTOCOL STRUCTURE FOR THE IUCS INTERFACE (OVER IP)
Page68
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BSC6900 35
ROUTINE MAINTENANCE MML FOR THE IUCS INTERFACE
Page69
• Query the status of the SAAL/SCTP link.
– DSP SAALLNK (Over ATM)
– DSP SCTPLNK (Over IP)
• Query the status of the MTP3/M3UA link.
– DSP MTP3LNK (Over ATM)
– DSP M3LNK (Over IP)
• Query the status of the SCCP SSN: DSP SSN
• Query the status of the SS7 destination signaling point: DSP N7DPC
• Query the status of the adjacent node: DSP ADJNODE
• Check whether the CN node in the CS domain is configured: LST GCNNODE or LST
UCNNODE
• query the status of the AAL2/IP path on the Iu-CS interface
– DSP AAL2PATH (Over ATM)
– DSP IPPATH (Over IP)
PROTOCOL STRUCTURE FOR THE IUPS INTERFACE (OVER ATM)
Page70
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BSC6900 36
PROTOCOL STRUCTURE FOR THE IUPS INTERFACE (OVER IP)
Page71
ROUTINE MAINTENANCE MML FOR THE IUPS INTERFACE
Page72
• Query the status of the SAAL/SCTP link.
– DSP SAALLNK (Over ATM)
– DSP SCTPLNK (Over IP)
• Query the status of the MTP3/M3UA link.
– DSP MTP3LNK (Over ATM)
– DSP M3LNK (Over IP)
• Query the status of the SCCP SSN: DSP SSN
• Query the status of the SS7 destination signaling point: DSP N7DPC
• Query the status of the adjacent node: DSP ADJNODE
• Check whether the CN node in the CS domain is configured: LST GCNNODE or
LST UCNNODE
• Check whether the connection to the SGSN is normal: PING IP (over ATM )
• Query the status of the IP path on the Iu-CS interface: DSP IPPATH (over IP )
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BSC6900 37
QUESTIONS
Page73
• Please describe the different protocol structure for Iub, IuCS, IuPS, and what is the difference between user plane and control plane?
• Please practice all the commands according to the practice guide in BSC6900 O&M Student Book
CONTENTS
1. OM System Introduction
2. Operation Right Management
3. Alarm management
4. Log management
5. Device panel management
6. BSC maintenance
7. Routine MML commands
8. Trace management
9. Performance monitoring
10. Board Replacement
11. Transmission Detection
Page74
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BSC6900 38
CONTENTS
8. Trace management
8.1 Basic Concepts
8.2 GSM Services
8.3 UMTS Services
Page75
PRINCIPLES OF THE MESSAGE TRACING
Page76
• Creating a Tracing Task
• Closing a Tracing Task
• Reporting Traced Messages to the LMT
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BSC6900 39
TRACE MODE
Page77
• When you creating the tracing task, two types of Trace Mode can be selected:
– Report
– Save to OMU
BROWSING TRACED MESSAGES OFFLINE
Page78
• There are two format of tracing files: .tmf or .csv. Only the the trace result in .tmf format can be browsed offline by LMT Offline Tool
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BSC6900 40
BASIC TRACING OPERATIONS
Page79
• Managing Tracing Tasks
• Managing the Trace File
GSM SERVICE
Page80
• CS Domain
•A Interface Tracing
•Um Interface Tracing
•Abis Interface Tracing
•Ater Interface Tracing
•A Single Subscriber Tracing
GSM Service
Monitoring
• PS Domain
•Um Interface Tracing
•Abis Interface Tracing
•Pb Interface Tracing
•Gb Interface Tracing
•PTP Messages
•SIG Messages
•A Single Subscriber Tracing
• Tracing Messages on the Cb Interface
• Tracing Group Call Messages
• BTS Signaling Messages
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BSC6900 41
UMTS SERVICE
Page81
• Iu Interface Tracing
• Iur Interface Tracing
• Iub Interface Tracing
• Uu Interface Tracing
• IP Messages Tracing
• UE Messages Tracing
• Cell Messages Tracing
QUESTIONS
Page82
• There are two tools for file transferring: File Manager and FTP tool, please describe the difference between them, and use each tool to transfer the tracing file?
• Please describe the main procedure of uploading a trace file from OMU to the LMT PC?
• What is default path for saving tracing files on LMT and OMU?
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BSC6900 42
CONTENTS
1. OM System Introduction
2. Operation Right Management
3. Alarm management
4. Log management
5. Device panel management
6. BSC maintenance
7. Routine MML commands
8. Trace management
9. Performance monitoring
10. Board Replacement
11. Transmission Detection
Page83
CONTENTS
9. Performance Monitoring
9.1 Basic Concepts
9.2 Service Monitoring
Page84
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BSC6900 43
MONITORING PRINCIPLES
Page85
• CPU usage monitoring:
• Other performance monitoring:
SERVICE MONITORING
Page86
• Common Monitoring
• GSM Monitoring
• UMTS Monitoring
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BSC6900 44
QUESTIONS
Page87
• What is default path for saving monitoring files on LMT, and what kinds of formats can be supported to save as?
• How could we browse the monitoring files in offline mode, which tool should be used?
SUMMARY
• We have introduced the operation and maintenance
functions in BSC6900 system, now please check
chapter 10 in BSC6900 O&M Student Book to master:
– Daily Maintenance Tasks
– Weekly Maintenance Tasks
– Monthly Maintenance Tasks
Page88
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BSC6900 45
CONTENTS
1. OM System Introduction
2. Operation Right Management
3. Alarm management
4. Log management
5. Device panel management
6. BSC maintenance
7. Routine MML commands
8. Trace management
9. Performance monitoring
10. Board Replacement
11. Transmission Detection
Page89
STEPS IN REPLACING A BOARD
Page90
Steps: There are two steps in replacing a BSC6900 board:
unfasten the faulty board and insert the new board.
Prerequisites: The tools required for unfastening the board are
available, including ESD wrist strap, Phillips screwdriver, ESD box
or ESD bag, dustfree cloth, and fiber cleaner.
Background information: All the boards except the OMUa support
hot swap.
Precautions: To avoid electrostatic damage, wear ESD wrist strap
correctly before replacing a board. If an ESD wrist strap is not
available or cannot be properly grounded, please wear ESD
gloves.
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BSC6900 46
UNFASTENING THE FAULTY BOARD
Page91
Unfasten the faulty board from the subrack.
INSERTING THE NEW BOARD
Page92
Insert the new BSC6900 board to the subrack.
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BSC6900 47
REPLACING A SPARE BOARD
Page93
Principles of replacing a board Replacing an active or standby board: To replace an active board, run SWP BRD to switch over the boards, pull out the now-standby board, and insert the new board. To replace a standby board, pull out the standby board and insert the new board. Replacing an independent board: This operation impacts the services and can cause service interruption. To replace an independent board, transfer the services of the board, run INH BRD to inhibit the board, pull out the faulty board, and insert the new board. Replacing a faulty board: If the faulty board is the DPU and only one or several DSPs are faulty, inhibit the normal DSPs, and replace the faulty board with a new one. Verifying the board replacement: Run LST BRD to query the board inhibition status. If the board is in "Inhibited" status, run UIN BRD to uninhibit the board and observe whether the board works normally. If not, check for alarms and analyze the problem according to the alarm.
REPLACING A SPARE BOARD
Page94
Replacing an XPU
Precautions: Replacing an active or standby XPU does not affect the
services; replacing an independent XPU causes interruption of all the
services over the BSC6900.
Operations: To replace an XPU, run DSP BRD to view the board status. If
the board works normally, transfer the services of the board, run INH BRD to
inhibit the board, pull out the board, and insert the new board. If the board is
faulty, pull out the faulty board and insert the new board.
Verifying the board replacement: Run LST BRD to query the board
inhibition status. If the board is in "Inhibited" status, run UIN BRD to uninhibit
the board. If the board is in "Uninhibited" status, run DSP BRD to view the
board status and check for alarms. If an alarm is generated for the board,
analyze the problem according to the alarm.
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BSC6900 48
REPLACING A SPARE BOARD
Page95
Replacing a DPU
Precautions: Replacing a DPU causes interruption of the services over the
DPU.
Operations: To replace a DPU, run DSP BRD to view the board status. If
the board works normally, transfer the services of the board, run INH BRD to
inhibit the board, pull out the board, and insert the new board. If the board is
faulty and one or several DSPs are faulty, run INH BRD to inhibit the normal
DSPs, pull out the faulty board, and insert the new board.
Verifying the board replacement: Run LST BRD to query the board
inhibition status. If the board is in "Inhibited" status, run UIN BRD to uninhibit
the board. If the board is in "Uninhibited" status, run DSP BRD to view the
board status and check for alarms. If an alarm is generated for the board,
analyze the problem according to the alarm.
CONTENTS
1. OM System Introduction
2. Operation Right Management
3. Alarm management
4. Log management
5. Device panel management
6. BSC maintenance
7. Routine MML commands
8. Trace management
9. Performance monitoring
10. Board Replacement
11. Transmission Detection
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LOOPBACK OF THE INTERFACE BOARD PORT
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• This task is used to query the loopback information of the electrical interface board and optical interface board. The loopback information includes loopback port No., loopback mode, and loopback status.
• The MML commands for this task are as follows:
– SET E1T1LOP
– SET OPTLOP
LOOPBACK OF THE INTERFACE BOARD PORT
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LOOPBACK OF THE INTERFACE BOARD PORT TIMESLOT
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• This task is used to query the loopback mode and loopback status of the timeslots of the interface board port.
• The MML commands for this task are as follows:
– DSP E1T1TS
– DSP OPTLOP
– SET E1T1LOP
– SET OPTLOP
LOOPBACK OF THE INTERFACE BOARD PORT TIMESLOT
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SUMMARY
• This course describes BSC maintenance, MML commands for maintenance, trace management, alarm management, device panel maintenance, log management, and performance monitoring.
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