OSN 8800 6800 3800 V100 Routine Maintenance 06

OptiX OSN 8800/6800/3800V100

Routine Maintenance

Issue 06

Date 2013-06-30

HUAWEI TECHNOLOGIES CO., LTD.

Copyright © Huawei Technologies Co., Ltd. 2013. All rights reserved.No part of this document may be reproduced or transmitted in any form or by any means without prior writtenconsent of Huawei Technologies Co., Ltd. Trademarks and Permissions

and other Huawei trademarks are trademarks of Huawei Technologies Co., Ltd.All other trademarks and trade names mentioned in this document are the property of their respective holders. NoticeThe purchased products, services and features are stipulated by the contract made between Huawei and thecustomer. All or part of the products, services and features described in this document may not be within thepurchase scope or the usage scope. Unless otherwise specified in the contract, all statements, information,and recommendations in this document are provided "AS IS" without warranties, guarantees or representationsof any kind, either express or implied.

The information in this document is subject to change without notice. Every effort has been made in thepreparation of this document to ensure accuracy of the contents, but all statements, information, andrecommendations in this document do not constitute a warranty of any kind, express or implied.

Huawei Technologies Co., Ltd.Address: Huawei Industrial Base

Bantian, LonggangShenzhen 518129People's Republic of China

Website: http://www.huawei.com

Email: [email protected]

Issue 06 (2013-06-30) Huawei Proprietary and ConfidentialCopyright © Huawei Technologies Co., Ltd.

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http://www.huawei.com

mailto:[email protected]

About This Document

Intended AudienceThe intended audiences of this document are:

l Field Maintenance Engineers

l Network Monitoring Engineers

l System Maintenance Engineers

Symbol ConventionsThe symbols that may be found in this document are defined as follows.

Symbol Description

DANGERIndicates a hazard with a high level of risk, which if notavoided, will result in death or serious injury.

WARNINGIndicates a hazard with a medium or low level of risk, whichif not avoided, could result in minor or moderate injury.

CAUTIONIndicates a potentially hazardous situation, which if notavoided, could result in equipment damage, data loss,performance degradation, or unexpected results.

TIP Indicates a tip that may help you solve a problem or savetime.

NOTE Provides additional information to emphasize or supplementimportant points of the main text.

GUI ConventionsThe GUI conventions that may be found in this document are defined as follows.

OptiX OSN 8800/6800/3800Routine Maintenance About This Document


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Convention Description

Boldface Buttons, menus, parameters, tabs, window, and dialog titlesare in boldface. For example, click OK.

> Multi-level menus are in boldface and separated by the ">"signs. For example, choose File > Create > Folder.

Change HistoryUpdates between document issues are cumulative. Therefore, the latest document issue containsall updates made in previous issues.

Updates in Issue 06 (2013-06-30)

Update Description

Items for RoutineMaintenance

l Updated the frequency of cleaning the air filter.l Deleted the check subitem about replacing the air filter.


Fixed some bugs in the earlier version.


Update Description


Updated the implementation method of equipment status checksubitem.


Update Description


Added the check subitem about performing the protectionswitching test periodically.


Fixed some bugs in the earlier version.



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Updates in Issue 01 (2011-04-15)This issue is the first official release for OptiX OSN 8800/6800/3800. This release provides thefollowing updates.

Update Description

Whole manual The structure is reorganized. 1 Purpose of Routine Maintenance, 2Guidelines to Safety Operations, 3 Tools for Routine Maintenance,and 4 Items for Routine Maintenance are modified as heading 1.

4 Items forRoutineMaintenance

Detailed implementation methods and links are added for eachmaintenance item.

Operation Guide This topic is deleted. Detailed maintenance methods involved in this topicare moved 4 Items for Routine Maintenance.

MaintenanceRecords

This topic is deleted.



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Contents

About This Document.....................................................................................................................ii

1 Purpose of Routine Maintenance...............................................................................................1

2 Guidelines to Safety Operations................................................................................................22.1 Alarm and Safety Symbols.............................................................................................................................................32.2 ESD.................................................................................................................................................................................32.3 Optical Fibers.................................................................................................................................................................52.4 Network Management System........................................................................................................................................7

3 Tools for Routine Maintenance..................................................................................................9

4 Items for Routine Maintenance................................................................................................10

OptiX OSN 8800/6800/3800Routine Maintenance Contents


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1 Purpose of Routine Maintenance

Routine maintenance helps ensure the reliable operation of the equipment and its protectionmechanisms, which protect services if the equipment fails, and enables site engineers to analyzethe operational environment of the equipment.

OptiX OSN 8800/6800/3800Routine Maintenance 1 Purpose of Routine Maintenance


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2 Guidelines to Safety Operations

About This Chapter

This section provides the guidelines for safety operations during routine maintenance, both toensure the safety and wellbeing of the operators and the security and condition of the equipment.

2.1 Alarm and Safety SymbolsDuring equipment installation and maintenance, observe the precautions indicated by the alarmand safety symbols to help prevent personal injury or equipment damage.

2.2 ESDDuring installation and maintenance, follow ESD procedures to prevent equipment damage:

2.3 Optical FibersThis topic describes the precautions for using and cleaning optical fibers.

2.4 Network Management SystemThis topic describes the precautions for using the U2000.

OptiX OSN 8800/6800/3800Routine Maintenance 2 Guidelines to Safety Operations


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2.1 Alarm and Safety SymbolsDuring equipment installation and maintenance, observe the precautions indicated by the alarmand safety symbols to help prevent personal injury or equipment damage.

Table 2-1 describes the alarm and safety symbols on the WDM equipment.

Table 2-1 Symbols on the WDM equipment

Symbol Describes

ESD protection symbol.You must wear an ESD wrist strap or glove to avoiddamage caused by electrostatic discharge to boards.

HAZARD LEVEL 1M INVISIBLE LASER RADIATION

DO NOT VIEW DIRECTLY WITH NON-ATTENUATING OPTICAL

INSTRUMENTS

CAUTION

Laser level symbol.Indicates the laser level and warns that laser beamscan cause injuries to eyes.

Grounding symbol.Indicates the position of the grounding point.

Regular cleaning symbol.Warns you to regularly clean the air filter.

Fan warning symbol.Warns you not to touch the fan blade until the fanstops moving.

2.2 ESDDuring installation and maintenance, follow ESD procedures to prevent equipment damage:

l Always wear an ESD wrist strap during the operation.l Check that the equipment is securely grounded.



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CAUTIONWear a well-grounded ESD wrist strap whenever you touch equipment or boards. Make surethat the wrist strap touches your skin. Insert the ESD strap connector into the ESD socket of theequipment.

For information about how to wear an ESD wrist strap, see Figure 2-1.

Figure 2-1 Wearing an ESD wrist strap

NOTE

Insert the connector of the ESD strap into the equipment port. For details, see the Quick Installation Guide.

When you are following ESD procedures, take the following precautions:

l Check the validity and functionality of the wrist strap. Its resistance value must be between0.75 mega ohm to 10 mega ohm. If the wrist strap validity period (usually two years) hasexpired, or if the resistance value fails to meet requirements, replace it with a wrist strapthat provides the required resistance value.

l Do not touch a board with your clothing. Clothing generates static electricity that is notprotected by the wrist strap.

l Wear an ESD wrist strap and place the board on an ESD pad when you replace boards orchips. Use ESD tweezers or extraction tools to replace chips. Do not touch chips, circuits,or pins with your bare hands.

l Keep the boards and other ESD-sensitive parts you are installing in ESD bags. Place theremoved boards and components on an ESD pad or ESD material. Do not use non-antistaticmaterials such as white foams, common plastic bags, or paper bags to pack boards, and donot let these materials touch the boards.

l Wear an ESD wrist strap when operating the ports of boards because they are also ESD-sensitive. Discharge the static electricity of cables and protective sleeves before you connectthem to the ports.



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l Keep packing materials (such as, ESD boxes and bags) available in the equipment roomfor packing boards in the future.

ESD complies with IEC Publication 1000, EN 55022, EN 55024, IEC 61000 and GR-1089-CORE.

2.3 Optical FibersThis topic describes the precautions for using and cleaning optical fibers.

DANGERAvoid direct eye exposure to laser beams. Laser beams from an optical port or optical fiber maycause eye damage.

Protecting a Fiber ConnectorWhen optical ports or fiber connectors are not in use, dustproof caps must be installed on theports and connectors.

Removed optical port boards must have air filter caps installed at the optical ports. The boardsmust be put into a proper packing box to keep the optical ports clean.

Figure 2-2 shows the recommended dustproof caps.

Figure 2-2 Recommended dustproof caps

Figure 2-3 shows the non-recommended dustproof caps.



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Figure 2-3 Non-recommended dustproof caps

NOTESoft rubber dustproof caps are not recommended, because they absorb dust and other waste material.

Connecting an Optical Fiber

WARNINGBecause of the extremely high optical power of lasers, when a loopback test is performed on anoptical port using a pigtail, the optical attenuation must be increased to avoid damage to theequipment. For boards on which an attenuator can be added, the attenuator should be added tothe receive optical port.

When connecting an optical fiber, insert the optical fiber gently into the optical port. For detailson how to use fiber connectors, refer to the Supporting Tasks.

DANGERBefore inserting or removing a fiber on the Raman amplifying board CRPC, shut down the pumplaser to avoid damage to human body due to the extremely high optical power of the laser.

The CRPC imposes high requirements on the fiber splice loss of the line nearby, as shown inTable 2-2.

Table 2-2 Fiber connection requirement of the CRPC

Distance Splice Loss (dB) Connector (Piece)

0-10 km (0-6.21 miles) ≤0.1 0



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Distance Splice Loss (dB) Connector (Piece)

10 km-20 km (6.21miles-12.43 miles)

≤0.2 0

NOTEThe line interface on the CRPC connects to the optical port on the ODF through fiber connectors. Otherconnection points adopt the fiber splicing form.

For details on how to use fiber connectors, refer to the Supporting Tasks.

Cleaning an Optical Fiber

To avoid damaging optical equipment, always use the correct cleaning tools and materials toclean fiber connectors and optical ports.

The following is a list of common cleaning tools and materials:

l Special cleaning solvent. (Isoamylol is preferred, although propyl alcohol can be used.)

WARNINGAlcohol is not recommended and formaldehyde is forbidden.

l Lint-free wipes

l Lint-free swabs

l Optical-grade compressed air duster

l Optical-grade cleaning roll

l Inspection microscope

CAUTIONBefore using an inspection microscope to inspect a fiber connector, use an optical powermeter to confirm that the laser is powered off.

For details on how to clean an optical fiber, refer to the Supporting Tasks.

2.4 Network Management SystemThis topic describes the precautions for using the U2000.

l Set the server time before installing the U2000. Do not change the server time when theU2000 is running.

– If there is a need to change the server time, exit the U2000 server and shut down thedatabase. Then restart the U2000 server after the change.



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– If there is a need to change the client time, exit the U2000 client and restart theU2000 client after the change.

l Do not change the name or IP address of the computer on which the U2000 server is installedunless absolutely necessary.

l When logging in to the U2000 server from a UNIX platform, use "U2000" as the user name.When logging in to the U2000 server from a Windows platform, use the user name createdwhen the U2000 was installed (do not change this user name).

l After configuring an NE and it is running normally, manually synchronize the NE data withthe U2000 to ensure that the data on the U2000 and NE is consistent.

l Back up the U2000 database regularly to minimize any data loss caused by systemexceptions.

l Before setting NE parameters, query the latest data on the NE.l When requesting most operations that could degrade or adversely affect the running of the

system, the U2000 asks for confirmation before processing the request.l A U2000 license file is an authorized file and must be kept confidential. Do not change or

alter the license file in any way. Any change or alteration will invalidate the license.



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3 Tools for Routine Maintenance

This topic lists the tools required for routine maintenance. All the tools must be available andoperable before the routine maintenance.

Table 3-1 lists the tools required for routine maintenance and their usage.

Table 3-1 Tools for routine maintenance

Name Usage

U2000 Backing up data on both the NE and U2000 to prevent dataloss

Fiber cleaning tools Cleaning optical fibers without causing damage

Optical power meter Measuring the optical power

Variable optical attenuator Reducing optical power to prevent damage to optical ports

Blower Cleaning air filters

OptiX OSN 8800/6800/3800Routine Maintenance 3 Tools for Routine Maintenance


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4 Items for Routine Maintenance

This topic lists the items involved in routine maintenance and describes their implementationmethods.

Table 4-1 lists routine maintenance items and implementation methods.

OptiX OSN 8800/6800/3800Routine Maintenance 4 Items for Routine Maintenance


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Table 4-1 Routine maintenance items and implementation methods

Item Subitem Frequency

Implementation Method Priority

Preparations

Collectingnetworkinginformation

/ Obtain networking information and update thenetwork documents and diagrams in real time incase of changes.1. Update the network design PPT documentsand wavelength allocation diagrams. Obtain theaccurate distance and types of optical fibersused between two sites, the dispersioncoefficient, and the OSNR.2. Obtain any network-specific configurations,for example, protection types and specialfunctions such as intelligent power adjustment(IPA), automatic level control (ALC), andautomatic power equalization (APE).3. Check for equipment that is connected tothird-party equipment. Pay attention to specialconfigurations and compatibility requirementsfor interconnection.4. Obtain engineering design documents,including slot layouts, fiber connectiondiagrams, mappings between site names, IDsand IP addresses, cabling diagram of thetelecommunications room, layout of thetelecommunications room, and port allocationon the ODF.5. Obtain the U2000 MOs and scripts.6. Obtain historical preventive maintenanceinspection (PMI) information about sites.7. Obtain the board manufacturer information ofthe entire network from the U2000.

Minor

Checkingversionmappinginformation

Monthly

1. Collect the version information (patchversion information included) of all NEs, theU2000, and tools.2. Check whether the versions of a site arecustomized and then make upgrade plans basedon the check result.

Major

Preparingmaintenance tools

Monthly

Contact Huawei engineers to preparemaintenance tools, such as the U2000, PMItools, fault collection tools, and the DC tool.Contact Huawei engineers to preparemaintenance tools, such as the U2000, PMItools, fault collection tools, and the DC tool.

Minor



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Applyingformaintenanceaccounts

Monthly

Apply for account names and passwords formaintenance, including the user names andpasswords for logging in to the U2000 andremotely accessing the VPN.

Major

Preparinginstructiondocuments

Monthly

Prepare the Release Notes matching the relatedversions, product documentations, andOperation Manuals of the related tools.

Major

Checkingtheinventoryof spareparts

Quarterly

Collect information about boards used on thelive network, and then contact Huaweiengineers to check the availability of spare partsfor these boards by using the spare part PTOmodel.

Minor

Equipmentstatuscheck

Checkingfor alarms

Daily 1. Verify that NEs are properly configured toreport alarms automatically. Set alarmsuppression or alarm reversion for specificalarms. For details on how to set alarmsuppression and alarm reversion, see "SettingAlarm Masking" and "Setting AlarmReversion" in the Supporting Tasks.2. Check NE alarms and ensure that there are nounexpected critical alarms. Clear all alarms onthe live network. If an alarm cannot be cleared,identify the cause. For details on how to checkfor alarms, see "Querying the Current Alarms"in the Supporting Tasks.

Critical



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Checkingequipmentperformance

Daily 1. Verify that performance monitoring isenabled on equipment. For details on how toenable performance monitoring, see "EnablingPerformance Monitoring Function" in theSupporting Tasks.2. Check the transmit and receive optical powerof OTU boards, line boards, and tributaryboards, and ensure it is within the permittedrange. For details on how to verify the opticalpower, see "Querying Optical Power of theBoard" in the Supporting Tasks.3. Check the performance of OTU boards, lineboards, and tributary boards. Ensure that no biterrors are generated after error correction. Inaddition, check current and historical 15-minute/24-hour performance data on the WDMsides of boards and ensure that there are nouncorrectable frames. For details on how tocheck for bit errors, see "Browsing the CurrentBit Error Performance" in the SupportingTasks.4. Check service data and ensure that there areno abnormal RMON performance events. Fordetails on how to check for RMON performanceevents, see "Viewing the Statistical GroupPerformance of an Ethernet Port" in theSupporting Tasks.

Critical

Checkingambientenvironment

Daily 1. Check the operating temperature ofequipment and the ambient temperature insidetelecommunications rooms, and ensure thesetemperatures are within the permitted ranges.For details on how to check operatingtemperature of the equipment and the ambienttemperature of an equipment room, see"Querying Board Temperature" and "CheckingEnvironment Monitoring Temperature" in theSupporting Tasks.2. Ensure that equipment surfaces and the wallsof telecommunications rooms are clean andtidy.3. Ensure that there are no signs (such as ratholes and biological waste) of rodents andinsects.NOTE

For requirements on temperature and dust, see"Environmental Requirements" in the ProductDescription.

Major



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Checkingprotection groupstatus

Daily 1. Check the working status of each serviceprotection group and the working and protectionchannels in each group, and check forunexpected protection switching. If a signal fail(SF) occurs, identify the cause and handle theSF promptly. For details on how to query theservice protection switching status, see"Querying Protection Switching State" in theSupporting Tasks.2. Check the protection status of boards,including the active and standby cross-connectboards, power supply boards, and systemcontrol boards, and ensure that they are properlyworking.

Major

Half-yearly

Perform the protection switching test to ensurethat the device can be properly switched andservices are normal after switching. Theprotection includes equipment-level protectionand network-level protection.l Equipment Level Protection: cross-connect

board 1+1 protection, SCC board 1+1protection, STG board 1+1 protection.

l Network Level Protection: Optical lineprotection, Optical channel protection,SNCP, ODUk SPRing protection, OWSP,ASON protection.

Major

Checkingservicetypes andrates ontheworkingandprotectionchannels

Quarterly

1. Ensure that service types, FEC types (AFEC,FEC or HFEC), and line rates (standard modeor speedup mode) on the working and protectionchannels are the same.2. For SNCP protection, the SNCP type must beset to SNC/N or SNC/S when services traverseregeneration boards.

Major

Checkingthemanufacturerinformation ofboards onthe entirenetwork

Monthly

Export the manufacturer information of allboards on the entire network from the NMS forapplying for spare parts or statistics collection.

Major



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Cleaningthe airfilter

Everytwoand ahalfmonths oreveryfivemonths

Ensure that the temperature of the equipmentroom is 25°C, the humidity is 70%, and the airfilter is cleaned at a frequency as follows:l If the environment of the equipment room

complies with ETSI 300019–1–3 class 3.1 orclass 3.6, clean the air filter every fivemonths.

l If the environment of the equipment roomcomplies with ETSI 300019–1–3 class 3.2,clean the air filter every two and a halfmonths.

If the environment does not meet the precedingrequirements, devices may be not properlyfunctioning. In this situation, clean the air filtermore frequently, for example, every two weeks.Clean the air filter with water, dry it with a drycloth, and then blow it with a blower. For detailson how to clean the air filter, see "Cleaning theAir Filter".

Major

Systemsecuritycheck

Checkingtheopticalpower ofOAboards

Daily 1. Export the 24-hour performance values fromthe U2000.2. Check the 24-hour optical power of opticalamplifier (OA) boards (the number ofwavelengths must remain the same during this24–hour period). Ensure that any change in theoptical power is within ±1 dBm and thedifference between the actual optical power ofthe OA boards and the theoretical optical poweris equal to or less than 2 dBm. For details on howto verify the optical power, see "QueryingOptical Power of the Board" in the SupportingTasks.3. Check the optical power of OA boards andadjust it according to the nominal optical power.For example, the output optical power of asingle wavelength in a 40-channel system is +4dBm, and that for a single-wavelength in an 80-channel system is +1 dBm.

Major



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CheckingNE dataconsistency

Monthly

On the U2000, select all NEs on theConfiguration Data Management Listinterface to check the consistency of all NE data.If the data on the U2000 and NE is inconsistent,determine whether to update the data on theU2000 or NE based on actual requirements. Ifthe data on the U2000 is incorrect, upload thedata from the NE to U2000; if the data on theNE is incorrect, contact Huawei engineers.

Major

Backingup dataandcheckingthebackupdata

Daily 1. Ensure that the automatic backup function isenabled for the databases.2. Check the protection mode of the databases.The databases cannot work in protection mode.Ensure that the returned value of the databaseprotection mode is normal.3. Ensure that equipment data has beenperiodically backed up to the U2000 server orclient. In case of any problem, contact Huaweiengineers to check the database data on the livenetwork by using the UpgradeKit, and verifythat no database exception occurs. To obtain theUpgradeKit, visit http://support.huawei.com.

Minor

Alarmanalysisandprocessing

Identifying alarmseverities

Daily 1. Prioritize critical and major alarms. Criticaland major alarms must be cleared prior to minoralarms, and alarms on line boards must becleared prior to those on tributary boards.2. Any alarms that customers are concernedabout must take priority to be cleared.

Critical

Clearingalarms

Daily 1. Confirm all identified alarms one by one. Ifan alarm is generated on an idle port, it isrecommended that you suppress or revert thealarm after confirming it with customers. Fordetails on how to suppress or revert alarms, see"Setting Alarm Masking" and "Setting AlarmReversion" in the Supporting Tasks.2. Plan a solution for any persistent alarms andassist customers in clearing these alarms.3. Clear all alarms on the live network. If analarm cannot be cleared, identify the cause.

Critical

Analyzinghistoricalalarms

Weekly

Analyze historical alarms on the equipment.Identify the causes of abnormal alarms andverify that they are cleared to prevent furtheralarms caused by equipment malfunctions.

Major



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Equipmentloadassessment

Checkingthequantityofsubrackson a livenetwork

Quarterly

Ensure that the quantity of master and slavesubracks satisfies the design requirements. Fordetails on the quantity of subracks, see "Master-Slave Subrack Planning Principles andCapabilities" in the corresponding ProductDescription.

Minor

CheckingECCsubnetload

Quarterly

1. Ensure that a secondary gateway NE (GNE)is available on chain networks. The secondaryGNE monitors the network in case of a fiber cuton the primary GNE. If no GNE is available, adda GNE by referring to the chapters about DCNmanagement in product manuals of the U2000.2. Ensure that the number of NEs on an ECCroute is less than 50 and the communicationmode between NEs complies with therestrictions in the product manual to reduce therisk of unreachability for a large number of NEs.

Minor

Analysisof specialfunctions

Checkingthe IPAfunction

Monthly

l On the WDM network, the IPA functionmust be configured for the NE that uses ahigh-power OA (with a 21.3 dBm maximumoutput optical power or higher).

l IPA pairs must be configured at both thetransmit and receive sites.

NOTEFor details on how to query the IPA, see"Dependencies and Limitations" and "Parameters:Raman IPA Management".Dependencies andLimitations"

For details on how to query the Raman IPA, see "and"Parameters: IPA Management".

Major

Checkingthe ALCfunction

Monthly

1. Check whether ECC routes are availablebetween ALC nodes and ensure that all ALCnodes are listed in the ECC routing table.2. Update the ALC status on the U2000 andensure that no error is reported.NOTE

For details on how to query the ALC, see"Parameters: ALC Management". For a node thatadds or drops a wavelength, you should configure theoptical amplifier unit in the receive direction as thedetection node and the optical amplifier unit in thetransmit direction as the reference unit.

Major



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Checkingthe WMUfunction

Monthly

1. Verify that physical fiber connections andlogical fiber connections are consistent.2. Check whether the configuration of the WMUpair is consistent with that of physical fiberconnections. Ensure that the IN1/IN2 port on theWMU board is connected to the MON port ofthe corresponding OA board. Otherwise,wavelength shift will occur on all OTU boards.3. Check whether a WAVELEN_OVER alarmindicating wavelength shift is reported. If yes,ensure the optical fiber is properly connected.

Major

Checkingthe clockstatus

Quarterly

1. Check the status of the PTP clock port.Confirm the cause and handle the fault in caseof an exception. For the method of querying theport status, see Querying the Clock SourceReceived at the Port in the FeatureDescription.2. Check the synchronization attribute of theIEEE 1588v2 clock. Confirm the cause andhandle the fault in case of an exception. For themethod of querying the synchronizationattribute of the IEEE 1588v2 clock, seeConfiguring PTP NEs in the FeatureDescription.3. Check the synchronization status of thephysical clock. Confirm the cause and handlethe fault in case of an exception. For the methodof querying the synchronization status of thephysical clock, see Viewing ClockSynchronization Status in the FeatureDescription.

Minor

Checkingtheintegrityof theE2E pathinformation

Quarterly

Verify that all E2E paths can be found on theU2000. If an E2E path cannot be found, checkthe integrity of the path.

Minor

ASON Checkingthedatabasesof ASONNEs

Updateduponchanges

1. Ensure that the scheduled database backuptask of the U2000 is properly performed. It isrecommended that the backup task be scheduledto start at 2:00 a.m. in the morning.2. If the networking changes, for example,services are newly provisioned or rerouted,manually back up the databases of all ASONNEs.

Critical



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Checkingcontrollink status

Monthly

1. On the U2000, synchronize control links onthe entire network on the Control LinkManagement interface.2. Check for isolated NEs on the Control LinkManagement interface. Ensure that isolatedNEs, if any, are running properly.3. Ensure that the current control link data is thesame as the historical control link data. Ifdifferences exist but the current data is correct,record the current control link data for futureverification.

Major

CheckingTE linkstatus

Monthly

1. On the U2000, synchronize TE links on theentire network on the TE Link Managementinterface.2. Check for interrupted or degraded TE links.3. For optical-layer TE links, ensure that thecurrent control link data is the same as thehistorical control link data. If differences existbut the current data is correct, record the currentcontrol link data for future verification.

Major

CheckingforASONservicealarms

Daily Synchronize ASON services and check forASON service alarms. Pay special attention tothe following alarms:1. Alarms indicating that services areinterrupted2. Alarms indicating that the service protectioncapability degrades3. Alarms indicating that services are not on theoriginal trail4. Alarms indicating that service rerouting islocked

Critical

CheckingASONservicestatus

Daily After synchronizing ASON services, verify thatall ASON services are properly activated.

Critical



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CheckingforASONabnormalevents

Daily Check for the following abnormal performanceevents:1. Events indicating that the ASON servicererouting has failed (ASON service reroutinginformation can be found in the additionalinformation about the ASON trail reroutingevent.)2. Events indicating that the ASON service re-creation has failed (ASON service re-creationinformation can be found in the additionalinformation about the ASON trail re-creationevent)

Critical

PMI Performing PMIs

Monthly

Perform PMIs using the associated tools, andselect preventive maintenance items based onthe equipment type.

Major



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Documents

OSN 8800 6800 3800 V100 Routine Maintenance 06