OSN-00449023-Supporting Tasks(V100R008_01)

OptiX OSN 3500 Intelligent Optical Transmission System

V100R008

Supporting Tasks

Issue 01

Date 2008-07-30

Part Number 00449023

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Contents

About This Document.....................................................................................................................1

1 Querying Current Alarms on T2000.......................................................................................1-1

2 Replacing Boards Onsite..........................................................................................................2-1

3 Installing the Boards..................................................................................................................3-1

4 Removing the Boards................................................................................................................4-1

5 Replacing Pluggable Optical Modules on Site....................................................................5-1

6 Software Loopback....................................................................................................................6-16.1 Outloop............................................................................................................................................................6-36.2 Inloop..............................................................................................................................................................6-36.3 Loopback at an SDH Interface........................................................................................................................6-46.4 Loopback at a VC-4 Path................................................................................................................................6-56.5 Loopback at a PDH Interface..........................................................................................................................6-66.6 Loopback at an Ethernet Interface...................................................................................................................6-76.7 Loopback at a VC-3 Path on the Ethernet Board............................................................................................6-76.8 Looping Back the Port on the ATM Board.....................................................................................................6-86.9 Loopback Example..........................................................................................................................................6-9

7 Hardware Loopback...................................................................................................................7-1

8 Resetting Boards.........................................................................................................................8-18.1 Resetting the GSCC Board..............................................................................................................................8-28.2 Resetting Other Boards...................................................................................................................................8-28.3 Resetting Boards by NM.................................................................................................................................8-2

9 Testing Received Optical Power.............................................................................................9-1

10 Testing Transmitted Optical Power...................................................................................10-1

11 Powering on the Equipment................................................................................................11-1

12 Powering off the Equipment................................................................................................12-1

13 Enabling/Disabling Lasers...................................................................................................13-1

14 Querying Optical Power on the T2000...............................................................................14-1

OptiX OSN 3500 Intelligent Optical Transmission SystemSupporting Tasks Contents

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15 Viewing the Board Information Report.............................................................................15-1

16 Viewing the Board Manufacturer Information Report...................................................16-1

17 Querying Working Temperature........................................................................................17-1

18 Checking Enabling Status of the Board Version Replacement Function...................18-1

19 Inspecting and Cleaning the Fiber-Optical Connectors.................................................19-119.1 Overview.....................................................................................................................................................19-219.2 Protection of Optical Fiber Connectors.......................................................................................................19-319.3 Inspecting Optical Connectors....................................................................................................................19-419.4 Cleaning Fiber Connector...........................................................................................................................19-7

19.4.1 Cleaning Optical Fiber Connectors Using Cartridge Cleaners..........................................................19-719.4.2 Cleaning Optical Fiber Connectors Using Lens Tissue...................................................................19-1019.4.3 Cleaning Optical Adapters Using Optical Cleaning Sticks..............................................................19-1219.4.4 Cleaning Optical Attenuators and Flanges.......................................................................................19-14

Index.................................................................................................................................................i-1

ContentsOptiX OSN 3500 Intelligent Optical Transmission System

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Figures

Figure 2-1 Remove a board..................................................................................................................................2-1Figure 2-2 Install a board.....................................................................................................................................2-2Figure 3-1 Wearing the ESD wrist strap..............................................................................................................3-2Figure 3-2 Removing the blank filler panel.........................................................................................................3-2Figure 3-3 Inserting a board.................................................................................................................................3-3Figure 4-1 Removing a board ..............................................................................................................................4-2Figure 5-1 Flow diagram of replacing the pluggable optical module..................................................................5-2Figure 5-2 Method of inserting and removing the pluggable optical module......................................................5-3Figure 6-1 Loopback example..............................................................................................................................6-9Figure 7-1 Difference between hardware loopback and software loopback........................................................7-1Figure 9-1 Diagram for testing the received optical power..................................................................................9-1Figure 10-1 Diagram for testing the transmitted optical power.........................................................................10-1Figure 11-1 Mapping between the power switch of the subrack and the PIU board.........................................11-1Figure 18-1 Legend for the board manufacturing information report on the T2000..........................................18-2Figure 19-1 Optical fiber connector...................................................................................................................19-2Figure 19-2 Protective caps recommended........................................................................................................19-3Figure 19-3 Protective caps not recommended..................................................................................................19-4Figure 19-4 An intact fiber.................................................................................................................................19-4Figure 19-5 Damaged or suspect fibers..............................................................................................................19-5Figure 19-6 An intact fiber.................................................................................................................................19-5Figure 19-7 Acceptable fibers with imperfections.............................................................................................19-5Figure 19-8 Unacceptable fibers with imperfections.........................................................................................19-6Figure 19-9 CLETOP cassette cleaner...............................................................................................................19-8Figure 19-10 Using the CLETOP cassette cleaner.............................................................................................19-9Figure 19-11 Dragging the fiber tip lightly on one cleaning area......................................................................19-9Figure 19-12 Dragging the fiber tip lightly on the other cleaning area............................................................19-10Figure 19-13 Cleaning the fiber tip with the lens tissue on the desk...............................................................19-11Figure 19-14 Cleaning the fiber tip with the lens tissue on the hand...............................................................19-12Figure 19-15 Cleaning stick for the SC and FC optical interface (for reference only)....................................19-13Figure 19-16 Cleaning stick for the LC optical interface (for reference only)................................................19-13

OptiX OSN 3500 Intelligent Optical Transmission SystemSupporting Tasks Figures


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Tables

Table 6-1 Terminology.........................................................................................................................................6-1Table 6-2 Outloop supported by the Optix OSN equipment................................................................................6-3Table 6-3 Inloop supported by the Optix OSN equipment...................................................................................6-4Table 7-1 Hardware loopback of SDH interfaces.................................................................................................7-2

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v

About This Document

PurposeBased on various services of the OptiX OSN 3500, this document describes a collection ofvarious common tasks for the product.

Related VersionsThe following table lists the product versions related to this document.

Product Name Version

OptiX OSN 3500 V100R008

OptiX iManager T2000 V200R006C03

Intended AudienceThe intended audiences of this document are:

l Field Maintenance Engineer

l Network Monitoring Engineer

l System Maintenance Engineer

OrganizationThis document provides a collection of various common tasks for the product, including fieldoperations and T2000 operations, such as board replacement and laser opening/closing.

OptiX OSN 3500 Intelligent Optical Transmission SystemSupporting Tasks About This Document


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Conventions

Symbol ConventionsThe following symbols may be found in this document. They 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 which,if not avoided, could result in minor or moderate injury.

CAUTIONIndicates a potentially hazardous situation that, if notavoided, could cause equipment damage, data loss, andperformance degradation, or unexpected results.

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

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

General ConventionsConvention Description

Times New Roman Normal paragraphs are in Times New Roman.

Boldface Names of files, directories, folders, and users are in boldface. Forexample, log in as user root.

Italic Book titles are in italics.

Courier New Terminal display is in Courier New.

Command ConventionsConvention Description

Boldface The keywords of a command line are in boldface.

Italic Command arguments are in italic.

[ ] Items (keywords or arguments) in square brackets [ ] areoptional.

About This DocumentOptiX OSN 3500 Intelligent Optical Transmission System

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Convention Description

{ x | y | ... } Alternative items are grouped in braces and separated byvertical bars. One is selected.

[ x | y | ... ] Optional alternative items are grouped in square bracketsand separated by vertical bars. One or none is selected.

{ x | y | ... } * Alternative items are grouped in braces and separated byvertical bars. A minimum of one or a maximum of all canbe selected.

GUI ConventionsConvention Description

Boldface Buttons, menus, parameters, tabs, window, and dialog titles are inboldface. For example, click OK.

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

Keyboard OperationFormat Description

Key Press the key. For example, press Enter and press Tab.

Key 1+Key 2 Press the keys concurrently. For example, pressing Ctrl+Alt+A means thethree keys should be pressed concurrently.

Key 1, Key 2 Press the keys in turn. For example, pressing Alt, A means the two keysshould be pressed in turn.

Mouse OperationAction Description

Click Select and release the primary mouse button without moving the pointer.

Double-click Press the primary mouse button twice continuously and quickly withoutmoving the pointer.

Drag Press and hold the primary mouse button and move the pointer to a certainposition.

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Update HistoryUpdates between document versions are cumulative. Therefore, the latest document versioncontains all updates made to previous versions.

Updates in Issue 01 (2008-07-30) Based on Product Version V100R008This document of the V100R008 version is of the first release.

About This DocumentOptiX OSN 3500 Intelligent Optical Transmission System

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1 Querying Current Alarms on T2000

Querying alarms is a common operation when you replace a component. By comparing thealarms before and after a component is replaced, you can know whether the new componentworks normally.

PrerequisiteYou must be an NE user with "NE and network monitor" authority or higher.

Tools/InstrumentsT2000

Procedure

Step 1 In the Main Topology of the T2000, right-click the required NE icon, and select Browse CurrentAlarms to display the Browse Current Alarms dialog box.

Step 2 Click Synchronize to display the Query Alarms dialog box, which displays the synchronizationprogress.

Step 3 After synchronization, the Operation Result dialog box is displayed. Click Close.

----End

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1-1

2 Replacing Boards Onsite

This section describes the basic method for replacing a board.

Procedure

Step 1 Wear an ESD wrist strap. To wear an ESD wrist strap for handling the OptiX OSN 3500, seeFigure 1.

Step 2 Record the relationship between the interfaces and optical fibers.

Step 3 Remove the optical fibers on the interfaces.

Step 4 Remove a board. Hold the top and bottom ejector levers on the front panel and pull them awayfrom the front panel at the same time. When the board is disengaged from the mother board andtaken out of the slot about 1 cm away , pull out the board horizontally by using proper force.See Figure 2-1.

Figure 2-1 Remove a board

21

Step 5 Put the board into an antistatic bag and affix a label to the bag, specifying the name of the NEand description of the fault.

OptiX OSN 3500 Intelligent Optical Transmission SystemSupporting Tasks 2 Replacing Boards Onsite


2-1

Step 6 Install a board. Hold the top and bottom ejector levers and pull them away from the front panel.Insert the board and slide it smoothly into the slot along the guide rail until the board does notslide any further. Fix the top and bottom ejector levers until you hear a click. See Figure 2-2.

Figure 2-2 Install a board

1 2

Step 7 Based on the corresponding relationship between the optical fibers and interfaces, connect thefibers to the corresponding interfaces.

Step 8 Observe the indicators. The STAT indicator should be green.

----End

2 Replacing Boards OnsiteOptiX OSN 3500 Intelligent Optical Transmission System

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3 Installing the Boards

This procedure guides you to install the boards into the subrack.

PrerequisiteThe subrack has been installed in the cabinet.

Tools/InstrumentsAn ESD wrist strap

Required/As NeededAs Needed.

Procedure

Step 1 Wear the ESD wrist strap as shown in Figure 3-1.

OptiX OSN 3500 Intelligent Optical Transmission SystemSupporting Tasks 3 Installing the Boards


3-1

Figure 3-1 Wearing the ESD wrist strap

Step 2 If a blank filler panel is installed on the slot, open its ejector levers to draw it out, as shown inFigure 3-2.

Figure 3-2 Removing the blank filler panel

1 2

Step 3 Open the ejector levers of the board with two hands. See Figure 3-3 (1).

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Figure 3-3 Inserting a board

1 2

3

Step 4 Slide the board along the guide rail into the slot until it cannot move forward. See Figure 3-3(2). Do push the board slowly.

Step 5 Close the ejector levers. See Figure 3-3 (3).

----End

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3-3

4 Removing the Boards

This procedure guides you to remove the boards from the subrack.

PrerequisiteNone.

Tools/InstrumentsAn ESD wrist strap

Required/As NeededAs needed.

CAUTIONIf there are any cables or fiber jumpers connected to a board, remove them first.

Procedure

Step 1 Wear the wrist strap as shown in Figure 3-1.

Step 2 Open the ejector levers with two hands. When you obviously feel that the board is away fromthe backplane (about 1 cm), draw the board gently. See Figure 4-1.

OptiX OSN 3500 Intelligent Optical Transmission SystemSupporting Tasks 4 Removing the Boards


4-1

Figure 4-1 Removing a board

1 2

Step 3 Put the board in an ESD bag. If this slot is no longer seated with a board, install a blank fillerpanel.

----End

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5 Replacing Pluggable Optical Modules onSite

The OptiX OSN 3500 supports the small form pluggable (SFP) module, which is pluggable. Ifthe optical module is faulty, replace the optical module instead of the board.

PrerequisiteYou must be a T2000 user with "NE and network operator" authority or higher.

Impact on ServiceBefore replacing the pluggable optical module, query whether the pluggable optical module tobe replaced at the optical interface is configured with protection.l If the protection is not configured, replacing the pluggable optical module may result in

service interruption.l If the protection is configured and the MSP or SNCP protection switching is normal,

replacing the optical module does not affect the services.

Tools/InstrumentsAnti-static bag, T2000

ReferenceFigure 5-1 shows the flow diagram of replacing the pluggable optical module.

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5-1

Figure 5-1 Flow diagram of replacing the pluggable optical module

Start

Query current boardalarms

Query networkprotection

configuration

On the T2000,configure the MSPprotection on the

equipment

Replace the faultyoptical module

On the T2000,cancel the MSP

switching

End

In the following description, the equipment configured with the MSP protection is used as anexample to describe the replacement procedure for pluggable optical modules.

Procedure

Step 1 On the T2000, query the current alarms of the board whose optical module need be replaced.For details, see 1 Querying Current Alarms on T2000.

Step 2 On the T2000, check whether the MSP protection is configured on the equipment. If theprotection is not configured, go to Step 4.

Step 3 On the T2000, configure the MSP switching on the equipment.1. Right-click the NE icon, and choose NE Explorer.2. Choose Configuration > Ring MS from the Function Tree.3. Select the board whose optical module need be replaced, and then right-click and choose

Exercise. Then, observe whether the MSP switching is normal.4. Query the alarms and performance events on the T2000. Ensure that no new alarms and

performance events occur and that services are normal. If the service is normal, no newalarms and performance events occur (exclusive of the MSP-related APS_INDI andMS_APS_INDI_EX alarms and performance events), and the switching is successful.

5. Right-click the icon of the board whose optical module need be replaced, and then chooseForced Switching.

Step 4 Replace the faulty optical module.

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NOTE

l When inserting the optical module, do not connect fiber jumper to the optical interface.

l Do not reversely insert the optical module. If the optical module cannot be completely inserted in onedirection, change a direction to insert the optical module without pushing the optical module withstrength.

l When the optical module is properly and completely inserted, you can hear a click from the spring chipof the optical module.

Figure 5-2 shows the method of replacing the pluggable optical module.

Figure 5-2 Method of inserting and removing the pluggable optical module

Inserting the pluggable optical moduleRemoving the pluggable optical module

Pull the safty latch to pullout the pluggable opticalmodule from the port.

1. Remove the fiber jumper at the optical interface.

2. Pull out the optical module gently by the bayonet lock.

3. Put the removed faulty optical module in the antistatic bag.

4. Select a new optical module whose type and specifications are consistent with those of theoriginal one.

5. Insert the optical module to the socket of the board.

6. Observe the indicators on the board, the green one should be on.

7. Test the receive and transmit optical power, which should be compliant with the engineeringfile.

8. Insert the fiber jumper into the optical interface correctly.

Step 5 On the T2000, release the MSP switching.

1. Right-click the NE icon, and choose NE Explorer.

2. Choose Configuration > Ring MS from the Function Tree.

3. Select the board whose optical module need be replaced, and then right-click and chooseClear.

OptiX OSN 3500 Intelligent Optical Transmission SystemSupporting Tasks 5 Replacing Pluggable Optical Modules on Site


5-3

NOTE

You can clear the switching configuration only when the board of which the optical module to bereplaced works normally.

4. Query the alarms and performance events on the T2000. Ensure that no new alarms andperformance events (exclusive of the alarms and performance events caused by clearingthe switching configuration) occur and that services are normal. If the services areabnormal, go to Step 2.

----End

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6 Software Loopback

About This Chapter

There are some terms that you need to know about before maintaining the equipment.

Table 6-1 lists the terms that you need to know. The understanding of these terms helps tofacilitate the troubleshooting process.

Table 6-1 Terminology

Term Meaning Legend

Upstreamstation

For a receiving station, the transmittingstation and stations being passedthrough are all its upstream stations. Inthe figure at the right, NE1 and NE2 areupstream stations of NE3. The servicesignals can be plesiochronous digitalhierarchy (PDH) signal, synchronousdigital hierarchy (SDH) signal,embedded control channel (ECC) signalor orderwire signal.

Service direction

NE1 NE2 NE3

Downstream station

Contrary to an upstream site, NE2 andNE3 are downstream stations of NE1.

Service direction

NE1 NE2 NE3

Oppositestation

An opposite station is defined based onthe service. In the figure at the right, ifNE1 is the local station, NE2 is theopposite station of NE1 in service 1;whereas in service 2, NE3 is theopposite station of NE1.

Service 1

NE1 NE2 NE3

Service 2

OptiX OSN 3500 Intelligent Optical Transmission SystemSupporting Tasks 6 Software Loopback


6-1

Term Meaning Legend

Adjacentstation

The adjacent station is used to describethe fiber connection. For example, NE1is the adjacent station of NE2, NE2 isthe adjacent site of NE1 and NE3 andNE3 is the adjacent station of NE2.

NE1 NE2 NE3

6.1 OutloopThe SDH optical interface board, PDH electrical interface board, Ethernet interface board andATM board all support outloop.

6.2 InloopThe SDH optical interface board, PDH electrical interface board, Ethernet interface board andATM board all support inloop

6.3 Loopback at an SDH InterfaceThis section describes how to loop back an optical interface on the SDH optical interface board.

6.4 Loopback at a VC-4 PathThis section describes how to loop back a VC-4 service on the SDH optical interface board.

6.5 Loopback at a PDH InterfaceThis section describes how to loop back a PDH electrical interface board.

6.6 Loopback at an Ethernet InterfaceThis section describes how to loop back an Ethernet port.

6.7 Loopback at a VC-3 Path on the Ethernet BoardThis section describes how to loop back a VC-3 service on the Ethernet board.

6.8 Looping Back the Port on the ATM BoardThis section describes how to loop back a port on the ATM board.

6.9 Loopback ExampleThis example is to test a VC-12 service trail in a chain network. The trail passes only three NEs(NE1, NE2 and NE3).

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6.1 OutloopThe SDH optical interface board, PDH electrical interface board, Ethernet interface board andATM board all support outloop.

Table 6-2 lists the outloop supported by different types of boards.

Table 6-2 Outloop supported by the Optix OSN equipment

Loopbackboard

Description Legend

SDH opticalinterface board

Loop back the signal inside theboard, from the optical receivingmodule to the opticaltransmitting module.

PDH Electricalinterface board


board

Cross-connect

unit

PDH electricalinterface board

Send the signal from thereceiving port inside the board,back to the transmitting port.

SDH opticalinterface

board

PDH Electricalinterface board

Cross-connectunit

Ethernetprocessing boardwith interface orEthernetinterface board

Send the signal from thereceiving port inside the board,back to the transmitting port.


board

Ethernetinterface board

Cross-connectunit

ATM board Send the signal inside the board,from the receiving port back tothe transmitting port.


board

ATM board Cross-connectunit

After the outloop setting on boards, use a BER tester to test whether the data processing modulesof boards connect properly with the external cables.

6.2 InloopThe SDH optical interface board, PDH electrical interface board, Ethernet interface board andATM board all support inloop

Table 6-3 lists the inloop supported by different types of boards.



6-3

Table 6-3 Inloop supported by the Optix OSN equipment

Loopback board Description Legend


Send the signal inside the board, backto the cross-connect unit.

SDHinterface

board

PDHinterface

board

Cross-connectunit

PDH electricalinterface board

Send the signal inside the board, backto the cross-connect unit.

SDHinterface

board

PDHinterface

board

Cross-connectunit

Ethernetprocessing boardwith interface orEthernet interfaceboard

Send the signal inside the board, backto the cross-connect unit. Ethernetelectrical interface board supportsport inloop at PHY layer and MAClayer respectively.

Ethernetinterface board

Cross-connectunit


ATM board Send the signal inside the board, backto the cross-connect unit.

SDHinterfaceATM board Cross-connect

unit

After the inloop setting on boards, use a BER tester to test whether the cross-connect unit andthe service trail work normally.

6.3 Loopback at an SDH InterfaceThis section describes how to loop back an optical interface on the SDH optical interface board.

PrerequisiteYou must be an NE user with "NE and network operator" authority or higher.

To test whether the interface module and external cables of a board are normal, you need to setan outloop.

To test whether the cross-connect unit and service path of the equipment are normal, you needto set an inloop.

Impact on ServicesIn the case of non-protection, the loopback may interrupt the services or the communicationsignals.


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Procedure

Step 1 In the Main Topology of the T2000, select the NE to be looped back.

Step 2 Right-click the NE icon in the Main Topology and select NE Explorer.

Step 3 Select the board from the Object Tree and select Configuration > SDH Interface from theFunction Tree.

Step 4 Select By Function. Select Optical (Electrical) Interface Loopback.

Step 5 Select the port and select the loopback mode Inloop or Outloop.

Step 6 Click Apply. The confirm dialog box is displayed. Click OK.

Step 7 The Operation Result dialog box is displayed and indicates that the operation is successful.Click Close.

----End

6.4 Loopback at a VC-4 PathThis section describes how to loop back a VC-4 service on the SDH optical interface board.






Procedure






6-5

Step 4 Select By Function. Select VC4 Loopback.

Step 5 Select the VC-4 and select the loopback mode Inloop or Outloop.



----End

6.5 Loopback at a PDH InterfaceThis section describes how to loop back a PDH electrical interface board.

Prerequisite

You must be an NE user with "NE and network operator" authority or higher.



Impact on Services

In the case of non-protection, the loopback may interrupt the services or the communicationsignals.

Tools/Instruments

T2000

Procedure



Step 3 Select the board from the Object Tree and select Configuration > PDH Interface from theFunction Tree.

Step 4 Select By Function. Select Tributary Loopback.

Step 5 Select the port and select the loopback mode Inloop or Outloop.



----End


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6.6 Loopback at an Ethernet InterfaceThis section describes how to loop back an Ethernet port.






Procedure



Step 3 Select the board from the Object Tree and select Configuration > Ethernet InterfaceManagement > Ethernet Interface from the Function Tree.

Step 4 Select External Port , and select the loopback mode MAC Loopback or PHY Loopback.



----End

6.7 Loopback at a VC-3 Path on the Ethernet BoardThis section describes how to loop back a VC-3 service on the Ethernet board.






6-7



Related InformationThe VC-3 loopback can be set only after services are configured on the Ethernet board. Boardswith different versions support different loopback modes at the VC-3 level.

ProcedureStep 1 In the main view of the T2000, select the NE to be looped back.



Step 4 Select By Function. Select VC3 Loopback.

Step 5 Select the VC-3 and select the loopback mode Inloop or Outloop.



----End

6.8 Looping Back the Port on the ATM BoardThis section describes how to loop back a port on the ATM board.







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ProcedureStep 1 In the Main Topology of the T2000, select the NE to be looped back.


Step 3 Select the board from the Object Tree and select Configuration > ATM InterfaceManagement from the Function Tree.

Step 4 Select External Port, and select the loopback mode Inloop or Outloop.



----End

6.9 Loopback ExampleThis example is to test a VC-12 service trail in a chain network. The trail passes only three NEs(NE1, NE2 and NE3).


Tools/InstrumentsT2000, BER tester

ContextAs shown in Figure 6-1. The OptiX OSN 3500 provides a series of loopback modes to trace thesignal and locate the fault.

Figure 6-1 Loopback example

SDH Iinterfaceboard

SDH Iinterfaceboard

BER Tester

SDH interfaceboard

Cross-connect unit

NE1 NE2 NE3

PDH interfaceboard

SDH interfaceboard

SDH interfaceboard

PDHinterface

board

SDH interfaceboard

PDH interfaceboard

1

2 3 4 5

67

Cross-connect unit

Cross-connect unit

BER Tester

east west east west

WARNINGBecause the loopback may interrupt the services, you need to select an idle path to perform thetest.



6-9

Procedure

Step 1 Outloop the PDH interface board in NE1 to test whether any failure point occurs between thedigital distribution frame (DDF) in NE1 on the PDH electrical interface board. You need to testthe DDF port corresponding to the path, and the cable between the DDF and the PDH interfaceboard, the PDH interface board, and the PDH processing board.1. Connect a BER tester to the port to be tested and set the tester correctly.2. Use the T2000 to set outloop on the port to be tested. See 6.5 Loopback at a PDH

Interface.3. Switch on the BER tester, which sends test signals to the loopback circuit.4. Check whether the BER tester receives any bit errors.

l If there are no bit errors, release the loop.

l If there is a bit error, the error may be caused by the following:– PDH processing board fault

– PDH interface board fault

– The cable between PDH interface board and BER tester is faulty. (The BER testerconnects to the PDH interface)

– The cable between PDH interface board and DDF is faulty. (The BER tester connectsto the DDF)

5. Replace components.l Replace the faulty board

l Replace the faulty cable

l Check the interface

Step 2 Cancel the previous loopback setting. Inloop the west SDH interface board in NE1 to test whetherany failure point occurs between the NE1 cross-connect and timing board and the NE1 east SDHoptical interface board.1. Connect a BER tester to the port to be tested and set the tester correctly.2. Use the T2000 to set inloop on the port to be tested. See 6.5 Loopback at a PDH



l If there is a bit error, the error may be caused by the following:– SDH board fault

– Cross-connect board fault

5. Replace the faulty board.

Step 3 Cancel the previous loopback setting. Outloop the west SDH interface board in NE2 to testwhether any failure point occurs between the west optical interface board in NE2 and the fiberfrom NE1 to NE2.1. Connect a BER tester to the port to be tested and set the tester correctly.2. Use the T2000 to set outloop on the port to be tested. See 6.5 Loopback at a PDH

Interface.


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Issue 01 (2008-07-30)

3. Switch on the BER tester, which sends test signals to the loopback circuit.4. Check whether the BER tester receives any bit errors.

l If there are bit errors, release the loop.


– Fiber connection fault between NE1 and NE2


l Replace the fiber between NE1 and NE2

Step 4 Cancel the previous loopback setting. Inloop the east SDH interface board in NE2 to test whetherany failure point occurs between the cross-connect and timing board in NE2 and the west opticalinterface board in NE2.1. Connect a BER tester to the port to be tested and set the tester correctly.2. Use the T2000 to set inloop on the port to be tested. See 6.5 Loopback at a PDH






Step 5 Cancel the previous loopback setting. Outloop the west SDH interface board in NE3 to testwhether any failure point occurs between the west optical interface board in NE3 and the fiberfrom NE2 to NE3.1. Connect a BER tester to the port to be tested and set the tester correctly.2. Use the T2000 to set outloop on the port to be tested. See 6.5 Loopback at a PDH




– Fiber connection fault between NE3 and NE2


l Replace the fiber between NE3 and NE2

Step 6 Cancel the previous loopback setting. Inloop the PDH interface board in NE3 to test whetherany failure point occurs between the cross-connect and timing board in NE3 and the PDHprocessing board in NE3.1. Connect a BER tester to the port to be tested and set the tester correctly.



6-11

2. Use the T2000 to set inloop on the port to be tested. See 6.5 Loopback at a PDHInterface.

3. Switch on the BER tester, which sends test signals to the loopback circuit.4. Check whether the BER tester receives any bit errors.

l If there are bit errors, release the loop.

l If there is a bit error, the error may be caused by the following:– PDH board fault



Step 7 Cancel the previous loopback setting. Outloop the PDH interface board in NE3 to test whetherany failure point occurs between the PDH processing board in NE3 to the DDF. You need totest the PDH processing board corresponding to the path, the PDH interface board, the cablebetween the interface board and the DDF, and the DDF interface.1. Connect a BER tester to the port to be tested and set the tester correctly.2. Use the T2000 to set outloop on the port to be tested. See 6.5 Loopback at a PDH



l If there is a bit error, the error may be caused by the following:– PDH processing board fault

– PDH interface board fault

– The cable between PDH interface board and BER tester is faulty. (The BER testerconnects to the PDH interface)

– The cable between PDH interface board and DDF is faulty. (The BER tester connectsto the DDF)

5. Replace the faulty board and cable.

----End


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Issue 01 (2008-07-30)

7 Hardware Loopback

Hardware loopback helps perform loopback at a physical port (optical interface or electricalinterface) with a fiber or self-loop cable manually.

Figure 7-1 shows the difference between hardware loopback and software loopback. They adoptsimilar methods to locate faults.

Figure 7-1 Difference between hardware loopback and software loopback

Softwareloopback

Transmittingmodule

Receivingmodule

The hardware loopback of SDH interface is divided into board loopback and cross-connectloopback depending on the loopback position. See Table 7-1.

OptiX OSN 3500 Intelligent Optical Transmission SystemSupporting Tasks 7 Hardware Loopback


7-1

Table 7-1 Hardware loopback of SDH interfaces

Loopback Description Legend

boardloopback

It means connecting the transmitting andreceiving interfaces on a board by using afiber.

IN

OUT

Opticalinterface board

IN

OUT

Opticalinterface board

cross-connectloopback

It means connecting the IN port on the eastoptical interface board to the OUT port onthe west optical interface board, andconnecting the OUT port on the east opticalinterface board to the IN port on the westoptical interface board. This operation isonly performed between two boards.

IN

OUT

West opticalinterface board

IN

OUT

East opticalinterface board

7 Hardware LoopbackOptiX OSN 3500 Intelligent Optical Transmission System

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Issue 01 (2008-07-30)

8 Resetting Boards

About This Chapter

A board can be reset in two methods: warm reset and cold reset. A warm reset does not affectthe running service, but a cold reset affects the running service.

8.1 Resetting the GSCC BoardAccording to different scenarios, you can use different methods to reset the boards.

8.2 Resetting Other BoardsWhen resetting boards, different methods should be applied according to different situations.

8.3 Resetting Boards by NMTo handle faults of a board, you need to reset the board.

OptiX OSN 3500 Intelligent Optical Transmission SystemSupporting Tasks 8 Resetting Boards


8-1

8.1 Resetting the GSCC BoardAccording to different scenarios, you can use different methods to reset the boards.

The following three methods can be applied to reset the GSCC board:

l Use the NM system to perform warm and cold reset to the GSCC. For detailed operations,refer to 8.3 Resetting Boards by NM.

l Press the reset button on the GSCC to perform cold reset to the board.

l Perform cold reset by removing and inserting the GSCC board.

8.2 Resetting Other BoardsWhen resetting boards, different methods should be applied according to different situations.

Other boards can be reset by using two methods:

l Warm or cold reset by NM. For details, refer to 8.3 Resetting Boards by NM.

l Cold reset by removing and inserting boards.

8.3 Resetting Boards by NMTo handle faults of a board, you need to reset the board.


Impact on ServicesA warm reset on a board does not affect the service that is running. A cold reset on a board may,however, affect the service that is running.


Procedure

Step 1 In the Main Topology of the T2000 NM, select the NE where a board needs to be reset.

Step 2 Double-click the NE icon to open the NE board layout.

Step 3 Right-click the board to be reset to call the shortcut menu.

Step 4 Click Warm Reset or Cold Reset.

Step 5 Board reset may affect the service, and you should confirm the operation in a prompt dialog box.

----End

8 Resetting BoardsOptiX OSN 3500 Intelligent Optical Transmission System

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Issue 01 (2008-07-30)

9 Testing Received Optical Power

This section describes how to test the received optical power. If the received optical power isabnormal, you need to test it.

Impact on Services

In the case of non-protection, the test on the received optical power may interrupt the services.

Tools/Instruments

Optical power meter

Procedure

Step 1 Set the wavelength of the optical power meter to be consistent with the one to be tested.

Step 2 Remove the fiber connecting the IN port of a receiver, and connect it to the optical power tester,as shown in Figure 9-1.

Figure 9-1 Diagram for testing the received optical power

RX

TX

SDH unit Cross-connect unit PDH unit

OptiX OSNequipment

Optical powertester

OUT

IN

ODFODFRX

TX

SDH unitCross-connect unit

PDH unit

OptiX OSNequipment

OUT

IN

Step 3 When the optical power result is stable, record it.

----End

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9-1

Related Informationl The fiber connector and the optical connector on the front panel of the optical interface

board are clean and well connected.l Do not stare at the laser port of the optical interface board and the fiber connector.

l The testing meter must be calibrated.

l Test the attenuation of the fiber first.

l Single mode and multi-mode modules should use different tail optical fibers.

l Before testing the optical power, you need to estimate the order of the accessed opticalpower. If the optical power is extremely powerful, you need to use an optical attenuator.

l If the optical interface board at the opposite end provides the automatic laser shutdown(ALS) function, you need to disable the ALS function on the T2000.

9 Testing Received Optical PowerOptiX OSN 3500 Intelligent Optical Transmission System

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Issue 01 (2008-07-30)

10 Testing Transmitted Optical Power

This section describes how to test the transmitted optical power. If the transmitted optical poweris abnormal, you need to test it.

Impact on ServicesIn the case of non-protection, the test on the transmitted optical power may interrupt the services.

Tools/InstrumentsOptical power meter

ProcedureStep 1 Set the wavelength of the optical power meter to be consistent with the one to be tested.

Step 2 Remove the fiber connecting the OUT port of the transmitter.

Step 3 Connect one end of the test fiber to the OUT port of the optical interface board of the transmitter,and connect the other end to the optical power tester, as shown in Figure 10-1.

Figure 10-1 Diagram for testing the transmitted optical power

RX

TX

SDH unitCross-connect

unit PDH unit

OptiX OSNequipment

Optical

OUT

IN

Step 4 When the optical power result is stable, record it.

----End

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10-1

Related Informationl Before testing the optical power, you need to estimate the order of the transmitted optical

power. If the optical power is extremely powerful, you need to use an optical attenuator.l If the optical interface board at the opposite end provides the automatic laser shutdown

(ALS) function, you need to disable the ALS function on the T2000.

10 Testing Transmitted Optical PowerOptiX OSN 3500 Intelligent Optical Transmission System

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Issue 01 (2008-07-30)

11 Powering on the Equipment

This section describes how to power on the subrack to ensure that the equipment can be poweredon successfully.

PrerequisiteThe power supply for the cabinet has been connected.

Tools/InstrumentsScrewdriver

Subrack Power SwitchThe mapping between the power switch of the subrack and the PIU board of the OptiX OSN3500, is shown in Figure 11-1.

Figure 11-1 Mapping between the power switch of the subrack and the PIU board

ONOFF

ONOFF

1 2 3 4 1 2 3 4

NIPIU NIPIU

28 PIUSlotSlot 27 PIU

Note: Subrack power switch No. 1 is used for the lower subrack.

Power module A Power module B

Subrack powerswitchs

Subrack powerswitchs

Sburack power switch No. 2 is used for the upper subrack.

OptiX OSN 3500 Intelligent Optical Transmission SystemSupporting Tasks 11 Powering on the Equipment


11-1

WARNINGDo not remove and insert the power supply connector and the PIU board.

Procedure

Step 1 OptiX OSN 3500, refer to Figure 11-1. Check the power cable of the subrack to ensure that thepower cable is properly connected to the PIU board of the relevant subrack.l The subrack power cable of power module A is connected to the PIU board in slot 27.

l The subrack power cable of power module B is connected to the PIU board in slot 28.

l Power switches 1 and 2 on the power supply module are used to provide power for the OptiXOSN 3500.

Step 2 Check the connector of the power cable to ensure that the connector is connected firmly. If theconnector is loose, tighten the screw by using a screwdriver.

Step 3 Turn the power switch at the DC power distribution unit, which is connected to the PIU board,to the ON position.

Step 4 Observe the PROG indicator on all the boards.l If the PROG indicator flashes, the board software is being initialized and loaded.

l After the board software is loaded successfully, the PROG indicator is on and green.

Step 5 Observe the PWRA and PWRB indicators on the GSCC board.l If the PWRA and PWRB indicators are on and in green color, the power supply is successful.

l If the PWRA and PWRB indicators are on and in red color, or off, the power supply fails.Check the power supply and handle the fault.

NOTE

l If the equipment accommodates two PIU boards, but accesses only one channel of power supply, onlythe PWRA or PWRB indicator is on and in green color.

l If the equipment accommodates only one PIU board, the PWRA and PWRB indicators are on and ingreen color.

Step 6 Check the power indicator at the top of the cabinet to ensure that it is normally on.

NOTEThe indicator at the top of the equipment is driven by the AUX board,. For this reason, the indicator at thetop of the cabinet is on only when the subrack is powered on.

----End

11 Powering on the EquipmentOptiX OSN 3500 Intelligent Optical Transmission System

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Issue 01 (2008-07-30)

12 Powering off the Equipment

This section describes how to power off the subrack.

ProcedurePower off the subrack: Turn off the air switch on the DC power distribution unit.

CAUTIONOnce it is powered off, this NE equipment exits from running status. Hence, all the services ofthe NE are interrupted.

----End

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12-1

13 Enabling/Disabling Lasers

This section describes the basic method for enabling and disabling lasers during the detectionof faults and the commissioning.

PrerequisiteYou must be an NM user with "NE and network operator" authority or higher.

Impact on System

After a laser is disabled, the services on the board where the laser is located are interrupted.

Tools/Instruments

T2000

Procedure

Step 1 Double-click the desired NE icon in Main Topology to display the NE Panel of the NE.

Step 2 Right-click the desired subrack NE and choose NE Explorer from the shortcut menu. Then,theNE Explorer window is displayed.

Step 3 Select the desired board in the NE Explorer, and then choose Configuration > SDHInterface from the Function Tree.

Step 4 Click By Function. SelectLaser Switch from the drop-down list.

Step 5 Double-click the desired optical interface. In the Laser Status field, choose Enabled orDisabled to change the laser state.

Step 6 Click Apply.

l After you enable the laser, click Close on the Operation Result dialog box.

l After you disable the laser, click OK on the Confirm dialog box. Click OK on thePrompt dialog box. Then, click Close on the Operation Result dialog box.

----End

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13-1

14 Querying Optical Power on the T2000

This section describes the basic method for querying the optical power of each board, so thatthe abnormal optical power point can be detected and located in time.


The board must be created.

Impact on SystemNone.


Background InformationFor the input and output optical power of each type of boards, refer to the HardwareDescription.

CAUTIONBack up the optical power of major boards.

Procedure

Step 1 Double-click the desired NE icon in Main Topology to display the NE Panel of the NE.

Step 2 Right-click the desired subrack NE and choose NE Explorer from the shortcut menu. Then, theNE Explorer window is displayed.

Step 3 Select the desired board in the NE Explorer, and then choose Configuration > Optical PowerManagement .

OptiX OSN 3500 Intelligent Optical Transmission SystemSupporting Tasks 14 Querying Optical Power on the T2000


14-1

Step 4 Click Query. On the displayed Operation Result dialog box, click Closed.

----End

14 Querying Optical Power on the T2000OptiX OSN 3500 Intelligent Optical Transmission System

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Issue 01 (2008-07-30)

15 Viewing the Board Information Report

The board information includes the board type, status, BIOS version, software version, Logicversion, PCB version, and the associated NE and slot. After configuring or updating a board,update the board information in time to facilitate management of the board.





Procedure

Step 1 Choose Report > Board Information from the Main Menu.

Step 2 Click the Board Information Report tab.

Step 3 In the Object Tree, select an NE or a board on the NE and click . You can view thegenerated report in the right-hand pane.

OptiX OSN 3500 Intelligent Optical Transmission SystemSupporting Tasks 15 Viewing the Board Information Report


15-1

Step 4 Click Query to query the information from the NE.

NOTE

Enter the information in the Remarks field and click Apply to save the information.

Step 5 Optional: Click Print to print the report or click Save As to export the report.

----End

15 Viewing the Board Information ReportOptiX OSN 3500 Intelligent Optical Transmission System

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Issue 01 (2008-07-30)

16 Viewing the Board ManufacturerInformation Report

The board manufacturer information report provides the information of board, such as the barcode, type, manufacture date, BOM code, and manufacturer information of the optical module.After configuring a new board, you need to update the board manufacturer information report.You can refer to this report during board maintenance.





Procedure

Step 1 Choose Report > Board Manufacturer Information Report.

Step 2 In the Object Tree, select an NE and click . You can view the generated report in theright-hand pane.

Step 3 Click Query to query the information from the NE.

OptiX OSN 3500 Intelligent Optical Transmission SystemSupporting Tasks 16 Viewing the Board Manufacturer Information Report


16-1

Step 4 Optional: Click Print to print the report or click Save As to export the report.

----End

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Issue 01 (2008-07-30)

17 Querying Working Temperature

During routine maintenance or heat dissipation failure, fast and accurately querying the workingtemperature can guide maintenance personnel to perform related operations. Then, potentialfaults can be rectified and impact caused by abnormal temperature can be reduced as possible.

Prerequisite

The function to monitor performance must be enabled on the T2000. If the function to monitorperformance is not started, refer to the OptiX iManager T2000 Online Help to enable the function.

Tools/Instruments

T2000

User Authority Level

You must be a T2000 user with "NE and network monitor" authority or higher.

Reference

When the equipment is working normally, the requirement of the working temperature is asfollows:

l Long-term running: 0°C to 45°C

l Long-term running: –5°C to 55°C

Procedure

Step 1 On the T2000, choose Performance > Browse SDH Performance from the Main Menu, andthen click the Current Performance Data tab.

Step 2 In Monitor Period, select 15-Minute or 24-Hour.

Step 3 Select one or more NEs from the left pane and click .

Step 4 Click the Gauge tab, and then select the type of the performance event of Temperature. Then,select Current Value.

OptiX OSN 3500 Intelligent Optical Transmission SystemSupporting Tasks 17 Querying Working Temperature


17-1

Step 5 Click Query to check the performance value of Current temperature of the board (°C) foreach board. The performance value should comply the requirement of working temperature whenthe equipment is working normally.

NOTE

Types of the working temperature that can be queried are listed as follows:

l Current working temperature of the laser (°C)

l Current temperature of the board (°C)

The types of working temperature that can be queried vary with board types. Only the current temperatureof the board (°C) is considered in this operation.

Step 6 If the performance value exceeds the normal working temperature, you can adopt the heatdissipation.

----End

17 Querying Working TemperatureOptiX OSN 3500 Intelligent Optical Transmission System

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Issue 01 (2008-07-30)

18 Checking Enabling Status of the BoardVersion Replacement Function

As a multiple ID board has different board IDs, query the board ID to check whether the boardversion replacement function is enabled or not.


Impact on ServiceNone.


Procedure

Step 1 In the Main Topology of the T2000, choose Report > Board Manufacturing InformationReport.

Step 2 Select the NE or board to be queried. Select the check box that corresponds to the NE or board,

and then click .

Step 3 Query the board information of the relevant slot. If the board name in : NE Name - Slot ID -Board Name is inconsistent with the board version or board name displayed behindBoardType, the current working board enables the board replacement function. As shown inthe red box of Figure 18-1. If the board name is consistent, the N2EFS0 board disables the boardreplacement function.

OptiX OSN 3500 Intelligent Optical Transmission SystemSupporting Tasks

18 Checking Enabling Status of the Board VersionReplacement Function


18-1

Figure 18-1 Legend for the board manufacturing information report on the T2000

----End

18 Checking Enabling Status of the Board VersionReplacement Function

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Issue 01 (2008-07-30)

19 Inspecting and Cleaning the Fiber-Optical Connectors

About This Chapter

Fiber-optical connectors must be kept clean.

19.1 OverviewIt is very important to inspect and clean every optical fiber connector before you perform fiberoptical connection. This chapter describes how to inspect and clean fiber connectors, opticaladapters and attenuators and flanges used in fiber optical connections.

19.2 Protection of Optical Fiber ConnectorsThe optical fiber connectors should be kept clean.

19.3 Inspecting Optical ConnectorsOptical connectors need to be kept clean.

19.4 Cleaning Fiber ConnectorUse the cassette cleaner, lens tissue, or dust-free cotton stick to clean the fiber connector.

OptiX OSN 3500 Intelligent Optical Transmission SystemSupporting Tasks 19 Inspecting and Cleaning the Fiber-Optical Connectors


19-1

19.1 OverviewIt is very important to inspect and clean every optical fiber connector before you perform fiberoptical connection. This chapter describes how to inspect and clean fiber connectors, opticaladapters and attenuators and flanges used in fiber optical connections.

Figure 19-1 shows the adapter and the fiber connector.

Figure 19-1 Optical fiber connector

Any dirt in the fiber connection can cause failure of the component or failure of the entire system.Even microscope dust particles can cause a variety of problems to optical connections. A particlethat partially or completely blocks the core generates strong back reflections, which can causeinstability of the laser system. Dust particles trapped between two fiber faces can scratch theglass surfaces. Even if a particle is situated on only the cladding or edge of the end face, it cancause an air gap or misalignment between the fiber cores. This sharply degrades the opticalsignal. Clean fiber optical components are the basis of quality connections between fiber opticalequipments. Cleaning the fiber optical connectors is one of the most basic and key proceduresto maintain an optical system.

A 1-micrometer dust particle on a single-mode core can block up to 1% of the light, which causesa loss of 0.05 dB. A 9-micrometer speck of dust is still too small to be seen without a microscope,but could completely block the fiber core. Hence, even though dust may not be visible, it is stillpresent in the air and can deposit onto the connector. In addition to dust, other types of dirt mustalso be cleaned off the end face. These types of dirt include:

l Oils (frequently from human hands)

l Film residues (condensed from vapors in the air)

l Powdery coatings (left after water or other solvents evaporate)

These types of dirt can be more difficult to remove than dust particles and can also cause damageto equipment if it is not removed. Always follow the procedures when you clean fibercomponents. This helps clear any dust or dirt and helps provide a clean environment for the fiberoptical connection.

19 Inspecting and Cleaning the Fiber-Optical ConnectorsOptiX OSN 3500 Intelligent Optical Transmission System

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Issue 01 (2008-07-30)

CAUTIONInspection, cleaning and re-inspection are key steps which must be done before you perform anyfiber optical connection.

19.2 Protection of Optical Fiber ConnectorsThe optical fiber connectors should be kept clean.

The protection requirements of the optical fiber connectors is as follows:

l All optical interface boards must be transported and stored in reliable packing. This helpsavoid mechanical and electrostatic damages and reduces vibrations.

l Store the protective caps in an antistatic bag.

l Cover the optical interfaces of the replaced boards with protective caps in time. Store themin proper packages to keep the optical interfaces clean.

Protective caps recommended are shown in Figure 19-2.

Figure 19-2 Protective caps recommended

Protective caps not recommended are shown in Figure 19-3.



19-3

Figure 19-3 Protective caps not recommended

19.3 Inspecting Optical ConnectorsOptical connectors need to be kept clean.

Prerequisite

Tools/Instrumentsl Optical power meterl Optical fiberscope with 20X capability (recommended to use a video fiberscope)

CriteriaFor an image of the intact fiber optical surface through a fiberscope that can be used successfullyin the equipment, see Figure 19-4.

Figure 19-4 An intact fiber


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Issue 01 (2008-07-30)

For images of fibers through a fiberscope with imperfections that can impair the function of theassembly, see Figure 19-5. The image on the left clearly shows a damaged fiber. Severelydamaged fibers must not be used in the system equipment. Otherwise, permanent and severedamage can occur to the assembly. The image on the right shows a fiber that is suspect. If theoutput power is within an acceptable range, the fiber may not cause any damage to the assembly.If the output power is unstable or falls outside the acceptable range, however, the fiber can causedamage to the assembly and must not be used.

Figure 19-5 Damaged or suspect fibers

CoreCladding

Damaged fiber (burned) Questionable fiber

CoreCladding

For details on acceptable and unacceptable fibers, see Figure 19-6, Figure 19-7 and Figure19-8.

Figure 19-6 An intact fiber

Core

Cladding

Buffer

Figure 19-7 Acceptable fibers with imperfections



19-5

Figure 19-8 Unacceptable fibers with imperfections

WARNINGLaser is dangerous. The laser light is not visible to the eyes with or without laser protectiveglasses. Do not stare at optical connectors or interfaces. Failure to follow this warning can causedamage to the eyes, or even blindness.

CAUTIONElectrostatic discharge (ESD) is hazardous to the electronic equipment. Handle the equipmentproperly to prevent damage to the electronic equipment. Failure to follow this caution can causeequipment damage and/or loss of service.

WARNINGUse a fiberscope equipped with a safety device that can cancel the optical path to the eye or adesktop video fiberscope when you inspect the optical connectors. If one is not available, turnoff the laser and disconnect both ends of the fiber before you inspect the optical connectors.

Procedure

Step 1 Turn off the laser before the inspection. Disconnect both ends of the fiber to be inspected.

Step 2 Test the optical power by using a power meter. Ensure that there is no laser light on the opticalconnector.

Step 3 Use a fiberscope to inspect the fiber to check if there is any dirt or damage. Refer to the followingexamples shown .


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Issue 01 (2008-07-30)

Step 4 If any dirt is detected, clean the optical connector. For details, refer to 19.4.1 Cleaning OpticalFiber Connectors Using Cartridge Cleaners and 19.4.2 Cleaning Optical Fiber ConnectorsUsing Lens Tissue.

Step 5 If any damage is detected, replace the fiber or board.

----End

19.4 Cleaning Fiber ConnectorUse the cassette cleaner, lens tissue, or dust-free cotton stick to clean the fiber connector.

19.4.1 Cleaning Optical Fiber Connectors Using Cartridge CleanersBefore cleaning, inspect the optical surface of the fiber with a fiberscope or a magnifier todetermine the extent to which the optical fiber may be damaged or dirty. Clean the optical fiberonly if it is dirty. If there is no dirt, do not clean it. This is because the cleaning itself mayintroduce dust, dirt, or cause potential damage to the optical fiber. Multiple types of cartridgecleaners can be used. The CLETOP cassette cleaner is taken as an example in the description.

19.4.2 Cleaning Optical Fiber Connectors Using Lens TissueBefore cleaning, inspect the surface of the optical fiber with a fiberscope or a magnifier todetermine the extent to which the optical fiber may be damaged or dirty. Clean the optical fiberonly if it is dirty. If there is no dirt, do not clean it. This is because cleaning itself may introducedust, dirt, or cause potential damage to the optical fiber. Follow the steps to clean the opticalfiber connectors by using lens tissue. To clean the optical fiber, you need to select special-purposematerials depending on the situation of the station.

19.4.3 Cleaning Optical Adapters Using Optical Cleaning SticksOptical adapters must be cleaned with special cleaning tools and materials. You can obtain thesetools and materials from a fiber cable and connector manufacturer. The following procedureprovides the steps to clean optical adapters by using optical cleaning sticks. There are severaltypes of optical cleaning sticks and cotton swabs that can be used. Refer to the local site practices.

19.4.4 Cleaning Optical Attenuators and FlangesOptical attenuators and flanges must be cleaned with special cleaning tools and materials, suchas the cleaning stick.

19.4.1 Cleaning Optical Fiber Connectors Using Cartridge CleanersBefore cleaning, inspect the optical surface of the fiber with a fiberscope or a magnifier todetermine the extent to which the optical fiber may be damaged or dirty. Clean the optical fiberonly if it is dirty. If there is no dirt, do not clean it. This is because the cleaning itself mayintroduce dust, dirt, or cause potential damage to the optical fiber. Multiple types of cartridgecleaners can be used. The CLETOP cassette cleaner is taken as an example in the description.

Tools/Instrumentsl CLETOP cassette cleaner

l Optical power meter

l Optical fiberscope with 20x magnification (a video fiberscope is recommended)



19-7


CAUTIONESD is hazardous to the electronic equipment. Handle the equipment properly to prevent damageto the electronic equipment. Failure to follow this caution can cause equipment damage and/orloss of service.

Procedure

Step 1 Turn off the lasers before the inspection. Disconnect both ends of the fiber to be inspected.

Step 2 Use a power meter to measure the fiber and ensure that there is no laser light on the opticalconnector.

Step 3 Press and hold down the lever, and slide back the shutter to expose a new cleaning area. SeeFigure 19-9 and Figure 19-10.

Figure 19-9 CLETOP cassette cleaner


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Issue 01 (2008-07-30)

Figure 19-10 Using the CLETOP cassette cleaner

Step 4 Place the fiber tip lightly against the cleaning area so that the end face is flat on the cleaningarea.

Step 5 Drag the fiber tip lightly on one cleaning area in the direction of the arrow once. See Figure19-11. Do it again on the other cleaning area in the same direction as the first time once. SeeFigure 19-12.

CAUTIONDo not scrub the fiber against fabric or clean the same cleaning area more than once. Otherwise,the connector can become dirty or it can damage the connector.

Figure 19-11 Dragging the fiber tip lightly on one cleaning area



19-9

Figure 19-12 Dragging the fiber tip lightly on the other cleaning area

Step 6 Release the lever to close the cleaning area.

Step 7 Inspect the fiber and repeat Steps 1 through 6 if the fiber is still dirty.

Step 8 Connect the fiber connector to the board.

Step 9 Turn on the lasers after you connect the fiber to the board.

----End

19.4.2 Cleaning Optical Fiber Connectors Using Lens TissueBefore cleaning, inspect the surface of the optical fiber with a fiberscope or a magnifier todetermine the extent to which the optical fiber may be damaged or dirty. Clean the optical fiberonly if it is dirty. If there is no dirt, do not clean it. This is because cleaning itself may introducedust, dirt, or cause potential damage to the optical fiber. Follow the steps to clean the opticalfiber connectors by using lens tissue. To clean the optical fiber, you need to select special-purposematerials depending on the situation of the station.

Tools/Instrumentsl Optical power meter


l Clean solvent. Isoamylol is preferred, propyl can be used (alcohol or formalin is never used)

l Non-woven lens tissue, lint-free wipes or fiber cleaning tissue (Non-woven lens tissue isrecommended)

l Special compressed gas

l Special cleaning roll


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Issue 01 (2008-07-30)



Procedure

Step 1 Turn off the lasers before the inspection. Disconnect both ends of the fiber to be inspected.

Step 2 Use a power meter to measure the fiber and ensure that there is no laser light on the opticalconnector.

Step 3 Place a small amount of cleaning solvent on the lens tissue.

Step 4 Clean the fiber tip on the lens tissue. See Figure 19-13 and Figure 19-14.

CAUTIONDo not scrub the fiber against fabric or clean the same cleaning area more than once. Failure tocomply with these methods can result in dirt in the connector or damage to the connector.

Figure 19-13 Cleaning the fiber tip with the lens tissue on the desk



19-11

Figure 19-14 Cleaning the fiber tip with the lens tissue on the hand

CAUTIONA piece of lens tissue can be used only once.

Step 5 Repeat Step 4 several times on the areas where the lens tissue has not been used.

Step 6 Use compressed gas to blow dust off the fiber tip.

Step 7 Inspect the fiber and repeat steps through 1 to 6 if the fiber is still dirty.

Step 8 Do not touch the fiber connector after you clean it. Connect it to the optical interface boardimmediately. If it is currently not used, put a protective cap on it.


NOTE

l When you use compressed gas, keep the injector nozzle close to the fiber connector surface withouttouching it.

l When you use compressed gas, first spray it into the air as the initial spray of compressed air can containsome condensation or propellant. Such condensation leaves a filmy deposit on the fiber.

l If compressed gas is not available, a clean roll can be used.

----End

19.4.3 Cleaning Optical Adapters Using Optical Cleaning SticksOptical adapters must be cleaned with special cleaning tools and materials. You can obtain thesetools and materials from a fiber cable and connector manufacturer. The following procedureprovides the steps to clean optical adapters by using optical cleaning sticks. There are severaltypes of optical cleaning sticks and cotton swabs that can be used. Refer to the local site practices.

Tools/Instrumentsl Optical power meter



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l Clean solvent, such as Isoamylol or propyl can be used. Alcohol or formalin should not beused.

l Special compressed gas

l Optical cleaning sticks used for optical connectors or cotton swabs (medical cotton or longfiber cotton)

DANGERLaser is dangerous. The light is not visible to the eyes with or without laser protective glasses.Do not stare at optical connectors or interfaces. Failure to follow this warning can cause damageto the eyes, or even blindness.


Procedure

Step 1 Turn off the laser before the inspection. Disconnect both ends of the fiber to be inspected.

Step 2 Use a power meter to measure and ensure that there is no laser light on the optical interface.

Step 3 Select the cleaning stick with a proper diameter for a certain type of adapter. For the SC and FCoptical interface, use a cleaning stick with a diameter of 2.5 mm; for the LC optical interface,use a cleaning stick with a diameter of 1.25 mm. See Figure 19-15 and Figure 19-16.

Figure 19-15 Cleaning stick for the SC and FC optical interface (for reference only)

Figure 19-16 Cleaning stick for the LC optical interface (for reference only)

Step 4 Place a small amount of cleaning solvent on the optical cleaning stick.

Step 5 Place the optical cleaning stick on the optical adapters such that the cleaning solvent touches thefiber tip. Hold the stick straight out from the adapter and turn the stick clockwise four to fivetimes. Make sure that there is direct contact between the stick tip and fiber tip.



19-13

Step 6 Use the compressed gas to blow off the fiber tip.

Step 7 Repeat Steps 1 through 6 if the optical adapter contains dirt.

Step 8 Connect the fiber to the board, or put a protective cap on the interface.


NOTE

l When you use the compressed gas, keep the injector nozzle close to the connector surface withouttouching it.

l When you use the compressed gas, first spray it into the air as the initial spray of compressed air cancontain some condensation or propellant. Such condensation leaves behind a filmy deposit.

----End

19.4.4 Cleaning Optical Attenuators and FlangesOptical attenuators and flanges must be cleaned with special cleaning tools and materials, suchas the cleaning stick.

Use the optical cleaning stick to clean optical attenuators and flanges. The steps are similar tothose of cleaning optical adapters. Refer to 19.4.3 Cleaning Optical Adapters Using OpticalCleaning Sticks.


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Index

Hhardware loopback, 7-1

Rresetting board, 8-1

OptiX OSN 3500 Intelligent Optical Transmission SystemSupporting Tasks Index


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OSN-00449023-Supporting Tasks(V100R008_01)

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