A10&DSL D&T GroupA10&DSL D&T Group

AM_TS01_E2_P1AM_TS01_E2_P1

Trouble shooting of MSANTrouble shooting of MSANV1.1V1.1

2Course OutlineCourse Outline

Classification of narrow/broad band

service faults

Specific Fault Analysis

Example of Trouble Shooting

3Fault ClassificationFault Classification

1. Hardware Fault

2. Improper Configuration

3. Version Fault

4Narrowband service fault AnalysisNarrowband service fault Analysis1. user terminal

2. Subscriber Line (External Line)

3. U300 +T600

4. LE

5. transmission system: S200

5Narrowband service fault Analysis ApproachNarrowband service fault Analysis Approach

1. Change Cards + Self Loop Test

2. 112 Test

3. V5 Signaling Tracing

6U/T Specific Fault AnalysisU/T Specific Fault Analysis

Fault Classification Fault Symptom Reasons of System Faults

Communication interruption between foreground and background

The NM displays: The NE link is interrupted, the query of the NE fails, and the maintenance operation.

The network card fault, ICS communication setting error, inconsistency between software version and hardware version

Active/standby switchover failure

The ICS active/standby switchover fails, the service is abnormal after switchover, and the board running is abnormal.

Inconsistency between software version and hardware version, and standby board fault

NE Data synchronization failure

The synchronization NE data times out or is wrong

Inconsistency between software version and hardware version

7U/T Specific Fault AnalysisU/T Specific Fault AnalysisFault

Classification Fault Symptom Reasons of V5 Protocol Faults

V5 interfaceinterruption

DT indicator indication on the ICS board is wrong,the V5 interface interruption alarm on the NM, V5interface L2 protocol alarm, V5 interface protocolis not established, all V5 subscribers cannotperform incoming/outgoing calls.

Hardware fault, line fault, V5 interfacedata configuration problem, accessnetwork clock problem, groundingproblem, and cooperation problemwith the exchange

V5 standby linkestablishment failure

V5 interface alarm on the NM, the northern link isnot established, and V5 interface switchingorigination failure

Hardware fault, line fault, V5 interfacedata configuration problem, andcooperation problem with the exchange

V5 partial protocolestablishment failure

The V5 protocol partial link layer is interrupted,and partial protocol cannot be established.

Hardware fault, line fault, cooperationproblem with the exchange, andgrounding problem

V5 interfaceprotection protocolabnormality

When the V5 interface is normal, the linkswitchover originated from the access side fails,and the signaling link cannot be switchedautomatically when the active link is faulty.

V5 interface data configurationproblem, and cooperation problemwith the exchange

2M link abnormality 2M link fault Hardware or line fault, incorrectconnection, and different configurationfrom the exchange

8S200 Specific Fault AnalysisS200 Specific Fault Analysis

Fault Classification Description of Fault

Inconsistency between board configuration and actual NE configuration on terminal

Command timeout returned when commands are sent on the NMS

Communication failure between the NMS and NE

Alarm box fault

Failure of NMS to receive the performance data of NEs

Failure of boards to be installed on the NMS

Failure to create logical subnet, with no timeslot available prompted

Failure of the NMS to receive alarms

NMS Faults

9Fault Classification Description of FaultOptical interface alarm occurred when optical fiber connection is normal

Loss of NE

NE board restarting without reason

Two-fiber unidirectional path protection failed

Two-fiber unidirectional multiplexing section protection failed

Board failed with the RUN indicator solid ON (Yellow)

NVM Disk Fault

Power-on failure of E1C or ES

NE board power-on failure when power input is normal

Ethernet interface indicator is OFF and link failed to receive or send packets

STP on ES failed

Incessant switchover of NE between clock sources

NE failed to lock the expected clock source

Traffic configuration failure

Excessive transmission bit errors

NE Faults

S200 Specific Fault AnalysisS200 Specific Fault Analysis

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Broadband service fault AnalysisBroadband service fault Analysis1. User (Modem +Computer)

2. Subscriber Line

3. U300 (RT +COT)

4. S200

5. Uplink Device ( Switches + BAS)

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Broadband service Common faultBroadband service Common fault1. Vlan Configuration

2. PVC Configuration

3. FE Port Attribute Configuration

4. User End Configuration

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ADSL User End Common StructureADSL User End Common Structure

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Specific Faults AnalysisSpecific Faults Analysis

1. Unable to Make Calls or Connect the Internet:

1) Usually this fault lies in the line in most cases;

2) Then check if the user-end splitter tap (to the phone set) and the

corresponding splitter board of this subscriber are normal

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Specific Faults AnalysisSpecific Faults Analysis

2. Call Can be Made but Internet Access Failed:

1) Record the subscribers MODEM model and indicator status;

2) Judge the fault according to the indicator status

3) Then the fault maybe stay with the user-end device, use method or

uplink port

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Specific Fault AnalysisSpecific Fault Analysis

3. Internet Access Allowed but at a Low Speed

1) If a large number of subscribers suffer a low Internet access speed;

2) If only several subscribers suffer a low Internet access speed: Check

the line quality, and check the line bit error ratio

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Specific Fault AnalysisSpecific Fault Analysis4. Unstable Internet Access and Frequent Offline Usually, it is

caused by the over-big high frequency attenuation from the poor line quality, overlong line, too-big line noise or poor line contact

1) First judge if the line exceeds 3 km;

2) Check if the splitter is installed properly

3) Check if each connector of the lead-in line is connected reliably

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Example Of Practical FaultExample Of Practical Fault1. Noise During Conversion in Big Area

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Example Of Practical FaultExample Of Practical Fault2. Remote E1 Alarm

TAB

ESQGE

E1

E1

Fiber

RT

S200

Q

S200/U300

PSTN

POWERK

POWERK

ATI

DLCC

TRK

TRK

TRK

TRK

ICS

ICS

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Example Of Practical FaultExample Of Practical Fault3. ADSL Subscribers Failed to View Web

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Example Of Practical FaultExample Of Practical Fault4. Slow broadband Access during Evening

Ip Network

HW3500

COT S200 T600

RT 2 U300

RT 1 U300

NMS

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Thanks

Thanks