01-03 Network Commissioning.pdf

OptiX BWS 1600G Commissioning Guide Contents

Issue 03 (2007-09-30) Huawei Technologies Proprietary i

Contents

3 Network Commissioning .........................................................................................................3-1 3.1 Engineering Information ...............................................................................................................................3-3

3.1.1 Networking Diagram............................................................................................................................3-3 3.1.2 Wavelength Allocation Diagram ..........................................................................................................3-4 3.1.3 Optical Amplifier Configuration Diagram ...........................................................................................3-5 3.1.4 Orderwire Configuration Diagram.......................................................................................................3-5 3.1.5 NE Board Configuration ......................................................................................................................3-5 3.1.6 Fiber Connection Diagram.................................................................................................................3-11

3.2 Requirements of Optical Power Commissioning ........................................................................................3-22 3.2.1 EDFA Optical Amplifier Units...........................................................................................................3-22 3.2.2 Raman Amplifier Units ......................................................................................................................3-23 3.2.3 OTU ...................................................................................................................................................3-24 3.2.4 OSC....................................................................................................................................................3-25 3.2.5 Other Boards ......................................................................................................................................3-25

3.3 Optical Power Commissioning Procedures .................................................................................................3-26 3.3.1 Commissioning at Station A (OTM) ..................................................................................................3-27 3.3.2 Commissioning at Station B (OLA)...................................................................................................3-29 3.3.3 Commissioning at Station C (OADM/ROADM)...............................................................................3-31 3.3.4 Commissioning at Station D (OLA)...................................................................................................3-40 3.3.5 Commissioning at Station E (OTM) ..................................................................................................3-40

3.4 Uploading NE Data .....................................................................................................................................3-41 3.5 Creating ONEs and Fiber Connection.........................................................................................................3-41 3.6 Testing the Wavelength Protection ..............................................................................................................3-41 3.7 Testing ALC ................................................................................................................................................3-44 3.8 Testing IPA..................................................................................................................................................3-44 3.9 Testing APE.................................................................................................................................................3-45 3.10 Testing the Orderwire................................................................................................................................3-46

3.10.1 Testing the Addressing Call..............................................................................................................3-46 3.10.2 Testing the Conference Call .............................................................................................................3-46

3.11 Testing the Bit Errors.................................................................................................................................3-47 3.11.1 Testing the 10-Minute Bit Errors of Each Optical Channel .............................................................3-48 3.11.2 Testing the 24-Hour Network-Wide Bit Errors ................................................................................3-48

Contents OptiX BWS 1600G

Commissioning Guide

ii Huawei Technologies Proprietary Issue 03 (2007-09-30)

3.12 Verifying the T2000 Functions..................................................................................................................3-49 3.13 Setting the Alarm and Performance Monitoring........................................................................................3-50 3.14 Backing Up NE Database..........................................................................................................................3-51

OptiX BWS 1600G Commissioning Guide Figures

Issue 03 (2007-09-30) Huawei Technologies Proprietary iii

Figures

Figure 3-1 Networking diagram of Project G.....................................................................................................3-3

Figure 3-2 Wavelength allocation diagram of Project G ....................................................................................3-4

Figure 3-3 Optical amplifier configuration diagram of Project G ......................................................................3-5

Figure 3-4 Orderwire configuration diagram of project G .................................................................................3-5

Figure 3-5 Board configuration of ONE A and ONE E (OTM) .........................................................................3-6

Figure 3-6 Board configuration of ONE B and ONE D (OLA) .........................................................................3-7

Figure 3-7 Board configuration of ONE C (OADM) .........................................................................................3-8

Figure 3-8 Board configuration of ONE C (ROADMDWC+DWC)..............................................................3-9

Figure 3-9 Board configuration of ONE C (ROADMWSD9+WSM9) ........................................................3-10

Figure 3-10 Board configuration of ONE C (ROADMWSD9+RMU9) ......................................................3-11

Figure 3-11 Fiber connection at station A (OTM, direction 1) .........................................................................3-12

Figure 3-12 Fiber connection at station B (OLA, direction 1) .........................................................................3-12

Figure 3-13 Fiber connection at station C (OADM, direction 1) .....................................................................3-13

Figure 3-14 Fiber connection at station C (ROADMDWC+DWC, direction 1) ..........................................3-14

Figure 3-15 Fiber connection at station C (ROADMWSD9+WSM9, direction 1) ......................................3-15

Figure 3-16 Fiber connection at station C (ROADMWSD9+RMU9, direction 1).......................................3-15

Figure 3-17 Fiber connection at station D (OLA, direction 1) .........................................................................3-16

Figure 3-18 Fiber connection at station E (OTM, direction 1) .........................................................................3-16

Figure 3-19 Fiber connection at station E (OTM, direction 2) .........................................................................3-17

Figure 3-20 Fiber connection at station D (OLA, direction 2) .........................................................................3-17

Figure 3-21 Fiber connection at station C (OADM, direction 2) .....................................................................3-18

Figure 3-22 Fiber connection at station C (ROADMDWC+DWC, direction 2) ..........................................3-19

Figure 3-23 Fiber connection at station C (ROADMWSD9+WSM9, direction 2) ......................................3-20

Figure 3-24 Fiber connection at station C (ROADMWSD9+RMU9, direction 2).......................................3-20

Figure 3-25 Fiber connection at station B (OLA, direction 2) .........................................................................3-21

Figure 3-26 Fiber connection at station A (OTM, direction 2) .........................................................................3-21

Figures OptiX BWS 1600G

Commissioning Guide

iv Huawei Technologies Proprietary Issue 03 (2007-09-30)

Figure 3-27 Accessing signals from the splitter ...............................................................................................3-27

Figure 3-28 Testing the inter-board wavelength protection switching .............................................................3-42

Figure 3-29 Testing the inter-board wavelength protection switching (switching) ..........................................3-43

Figure 3-30 IPA verification diagram...............................................................................................................3-44

Figure 3-31 Testing bit errors of one channel...................................................................................................3-48

Figure 3-32 Testing network-wide bit errors ....................................................................................................3-49

OptiX BWS 1600G Commissioning Guide Tables

Issue 03 (2007-09-30) Huawei Technologies Proprietary v

Tables

Table 3-1 Service requirement matrix in Project G ............................................................................................3-3

OptiX BWS 1600G Commissioning Guide 3 Network Commissioning

Issue 03 (2007-09-30) Huawei Technologies Proprietary 3-1

3 Network Commissioning About This Chapter

After the NE commissioning, you can perform network commissioning. This chapter describes the network commissioning of the OptiX BWS 1600G with an example.

Network commissioning serves to:

z Connect all the NEs in a network in line with the engineering design scheme. z Test the services of the network to verify the configuration. z Test the functions of the network, such as the orderwire and protection switching. z Test quality of the long-term communication in the network through alarms and

performance events.

The following table lists the contents of this chapter.

Section Describes

3.1 Engineering Information The engineering information of the sample network. This includes the network topology, configuration of boards in each NE and diagram of wavelength allocation.

3.2 Requirements of Optical Power Commissioning

The requirements of optical power commissioning on the OptiX BWS 1600G.

3.3 Optical Power Commissioning Procedures

The steps of optical power commissioning.

3.4 Uploading NE Data How to upload NE data on the T2000.

3.5 Creating ONEs and Fiber Connection

How to create ONE and fiber connection on the T2000.

3.6 Testing the Wavelength Protection

How to test the wavelength protection function.

3.7 Testing ALC How to test the ALC function.

3.8 Testing IPA How to test the IPA function.

3 Network Commissioning OptiX BWS 1600G

Commissioning Guide

3-2 Huawei Technologies Proprietary Issue 03 (2007-09-30)

Section Describes

3.9 Testing APE How to test the APE function.

3.10 Testing the Orderwire How to test the orderwire.

3.11 Testing the Bit Errors How to test bit errors.

3.12 Verifying the T2000 Functions

How to verify the T2000 functions.

3.13 Setting the Alarm and Performance Monitoring

How to set alarms and performance monitoring.

3.14 Backing Up NE Database How to back up the NE database.



3.1 Engineering Information This chapter describes Project G to illustrate the network commissioning. The engineering information is as follows:

z Networking diagram z Wavelength allocation diagram z Amplifier configuration diagram z Orderwire configuration diagram z NE board configuration diagram z Fiber connection diagram

3.1.1 Networking Diagram Figure 3-1 shows the network topology of Project G. In a chain network, optical network elements (ONEs) A, B, C, D and E are the stations installed with the OptiX BWS 1600G. ONE A and ONE E are assigned as OTM stations. ONE B and ONE D are two OLA stations. ONE C is an OADM station.

Figure 3-1 shows the span loss and distance between NEs.

Figure 3-1 Networking diagram of Project G

80 km (49.72 mi.)22 dB

OTM OLA OADM OTM

A B C E

OLA

D78 km (48.68 mi.)

21.45 dB82 km (50.96 mi.)

22.55 dB76 km (47.23 mi.)

20.9 dB

Service Requirement Table 3-1 lists the service requirements in Project G.

Table 3-1 Service requirement matrix in Project G

Station A C E

A 4 x STM-64 4 x STM-64 1 x STM-16

C 4 x STM-64 4 x STM-64

E 4 x STM-64 1 x STM-16a

4 x STM-64

a: The inter-board wavelength protection is required for 1 x STM-16 service between stations A and E.


Commissioning Guide


System Function Requirement The requirements of system functions in Project G are as follows:

z Automatic power equilibrium (APE) function z Automatic level control (ALC) function z Intelligent power adjustment (IPA) function

3.1.2 Wavelength Allocation Diagram Figure 3-2 shows the wavelength allocation diagram of Project G. The continuous line represents the working channel and the dashed line represents the protection channel.

Figure 3-2 Wavelength allocation diagram of Project G

A C E

LWF 192.10THz

LWF 192.20THz

LWF 192.30THz

LWF 192.40THzLWF 192.10THz

LWF 192.20THz

LWF 192.30THz

LWF 192.40THz

LWF 192.50THz

LWF 192.60THz

LWF 192.70THz

LWC1 192.90THzLWC1 193.00THz

STM-64

STM-16

STM-64

STM-64

LWF 192.80THz

LWF 192.50THz

LWF 192.60THz

LWF 192.70THz

LWC1 192.90THzLWC1 193.00THz

LWF 192.80THz(Woking)

(Protection)

STM-64

STM-64

STM-64

STM-64

STM-64

STM-64

STM-64

STM-64

STM-64

STM-16



3.1.3 Optical Amplifier Configuration Diagram Figure 3-3 shows the configuration of the optical amplifier on each station in Project G.

Figure 3-3 Optical amplifier configuration diagram of Project G

OBU-C03

DCM-D

OAU-C03

OAU-C03

DCM-D

OAU-C03

DCM-D DCM-D

OAU-C03

OBU-C03

OBU-C03

DCM-D

OAU-C03

OADM

OAU-C03

DCM-D

DCM-D

OAU-C03

OBU-C03

OAU-C03From

V40

ToD40

ToD40

FromV40

DCM-D

A B C D E

80 km (49.72 mi.)22 dB

78 km (48.68 mi.)21.45 dB

82 km (50.96 mi.)22.55 dB

76 km (47.23 mi.)20.9 dB

For indices of the boards with different specifications in Figure 3-3, refer to the OptiX BWS 1600G Backbone DWDM Optical Transmission System Product Description.

3.1.4 Orderwire Configuration Diagram Figure 3-4 shows the configuration of the orderwire on each station in Project G.

Figure 3-4 Orderwire configuration diagram of project G

OTM OLA OADM OTM

A B C E

OLA

D

Phone number101

Phone number102

Phone number103

Phone number104

Phone number105

3.1.5 NE Board Configuration

z The client-side optical modules on the LWFs on OTM and OADM stations are S-64.2b modules and

the WDM-side optical modules are PIN NRZ 100GHz modules. z The client-side optical modules on the LWC1 are I-16 modules and the WDM-side optical modules

are PIN NRZ 100GHz modules.

Figure 3-5 shows the board configuration of ONE A and ONE E.

Figure 3-6 shows the board configuration of ONE B and ONE D.

Figure 3-7, Figure 3-8, Figure 3-9 and Figure 3-10 show the board configuration of ONE C.


Commissioning Guide


Figure 3-5 Board configuration of ONE A and ONE E (OTM)

OAU

FIU

SC1

SCC

OBU

D40

SCC

V40

LWF

LWF

LWF

LWF

LWF

MCA

LWF

LWF

LWF

SCC

LW

LWC

1 1

C

SCS

Power Distribution Unit



Figure 3-6 Board configuration of ONE B and ONE D (OLA)


OAU

FIU

SC2

SCC

OAU

FIU


Commissioning Guide


Figure 3-7 Board configuration of ONE C (OADM)

OAU

SC2

SCC

OAU

SCC

FI

U

FI

U

OBU

OBU

MCA

MR2

MR2

MR2

MR2

LWF

LWF

LWF

LWF

LWF

LWF

SCC

LWF

LWF




Figure 3-8 Board configuration of ONE C (ROADMDWC+DWC)

OAU

SC2

SCC

OAU

SC

C

FI

U

FI

U

OBU

OBU

MCA

SCC

4M

0

M D

0

4

0

4D4

0

LWF

LWF

LWF

LWF F

WL

FWL

FWL

FWL

DW

C

DWC



Commissioning Guide


Figure 3-9 Board configuration of ONE C (ROADMWSD9+WSM9)

OAU

SC2

SCC

OAU

SCC

FIU

FIU

OBU

OBU

MCA

S

CC

L

WF

L

WF

4M

0

W D

0SD

4

9

L

WF

L

WF

L

WF

L

WF

WSM

M40

SCC

D40

WSD

WSM

9

99

L

W W

L

F F

Power Distribution Unit Power Distribution Unit



Figure 3-10 Board configuration of ONE C (ROADMWSD9+RMU9)

OAU

SC2

SCC

OAU

SCC

FIU

FIU

OBU

OBU

MCA

MR2

RMU

SCC

RM

2

WSD

LW

LWF

9

RMU9

WSD9 9


F

LLWW

F F

LWF

L L LW W WF F F

3.1.6 Fiber Connection Diagram The fiber connection diagram is provided based on the commissioning sequence and the following two directions:

z Direction 1: A B C D E

z Direction 2: E D C B A

In each diagram of fiber connection: z If the D40 connects to an OTU whose WDM side is a 2.5Gbit/s APD receiver, add a 10 dB fixed

optical attenuator to the IN interface of this OTU. z The fixed optical attenuator configured at the RX interface of the LWF is of 7 dB. z The fibers between the FIU and ODF subrack, the fibers between the LWF and client equipment and

the fibers between cabinets are all external fibers that should be routed on site.

For the rules to configure optical attenuators, refer to Appendix A "Optical Attenuator Configuration Rules".


Commissioning Guide


Fiber Connection Diagram (Direction 1) Figure 3-11 shows the fiber connection at station A (direction 1).

Figure 3-11 Fiber connection at station A (OTM, direction 1)

To station B

Fixed attenuator Variable attenuator

(X-nn): Subrack-slot. U indicates upper subrack. M indicates middle subrack. D indicates lower subrack.

(M-03)LWF

(M-04)LWF

(M-05)LWF

(M-06)LWF

(M-08)LWF

(M-09)LWF

(M-10)LWF

(M-11)LWF

(U-01)LWC1

(U-02)

OBU(D-01)

FIU(D-09)

(D-06)SC1

ODF ODF

RX

RX

RX

RX

RX

RX

RX

RX

RX

RX

OUT

OUT

OUT

OUT

OUT

OUT

OUT

OUT

OUT

OUTLWC1

M40

M39

M38

M37

M36

M35

M34

M33

M32

M31

SCS(U-03)

TO11

TO12

TI1

OUT IN OUT RC OUT

TM RM

V40(M-02)

West East

From client

equipment

Figure 3-12 shows the fiber connection at station B (direction 1).

Figure 3-12 Fiber connection at station B (OLA, direction 1)

To station C

From station A

Variable attenuator(X-nn): Subrack-slot. U indicates upper subrack. M indicates middle subrack. D indicates lower subrack.

OAU(D-01)

FIU(D-09)

(D-06)SC2

ODFIN OUT RC OUT

TM2 RM

FIU(D-05)ODF

TCIN

RM1TM

DCMTDC RDC

West East



Figure 3-13, Figure 3-14, Figure 3-15 and Figure 3-16 show the fiber connection at station C (direction 1).

Figure 3-13 Fiber connection at station C (OADM, direction 1)

Tostation D

Fromstation B

To client equipment From client equipment



OBU(D-10)

FIU(M-06) ODF

IN OUT RC OUT

TM2 RM

FIU(M-05)ODF

IN

RM1TM

OAU(D-01)

IN OUT INTC

DCMTDC

RDC

MR2(M-01)

MO MR2(M-02)

IN MR2(M-08)

MI MR2(M-09)

MIMO OUT OUT

(D-06)SC2

LWF

D01 D02 D01 D02 A01 A02 A01 A02

(M-03) (M-04) (U-01) (U-02) (M-10) (M-11) (M-12) (M-13)IN IN IN IN OUT OUTOUT OUT

TX TX TX TX RX RX RX RX

West East

West East

LWF

LWF

LWF

LWF

LWF

LWF

LWF


Commissioning Guide


Figure 3-14 Fiber connection at station C (ROADMDWC+DWC, direction 1)

M40

OBU(D-10)

FIU(M-06) ODF

IN OUT RC OUT

TM2 RM

FIU(M-05)ODF

IN

RM1TM

OAU(D-01)

IN INTC

DCMTDC RDC

(D-06)SC2

LWF

D01 D02

(U-03) (U-04) (U-05) (U-06)IN IN IN IN OUT OUTOUT OUT

TX TX TX TX RX RXRX RX

West East

West East

LWF

LWF

LWF

LWF

LWF

LWF

LWF

DWC

D40

DWCMO MI OUT

M01M39

IN OUT

M40 M38 M37D40 D39 D38 D37

DROP ADD

M40

(M-08)(U-01)

(M-04) (M-11)

(U-08) (U-09) (U-10) (U-11)


Tostation D

Fromstation B



In Figure 3-15, the M40 and WSM9 all locate in the lower subrack of the cabinets on the right.



Figure 3-15 Fiber connection at station C (ROADMWSD9+WSM9, direction 1)

M40

OBU(D-10)

FIU(M-06) ODF

IN OUT RC OUT

TM2 RM

FIU(M-05)ODF

IN

RM1TM

OAU(D-01)

IN INTC

DCMTDC RDC

(D-06)SC2

LWF

D40 D39

(U-01) (U-02) (U-03) (U-04) (U-08) (U-09) (U-10) (U-11)IN IN IN IN OUT OUT OUT OUT

TX TX TX TX RX RX RX RX

West East

West East

LWF

LWF

LWF

LWF

LWF

LWF

LWF

WSD9

D40

WSM9

DM1

EXPO

DM3DM2

EXPI

AM1 AM2 AM3

OUT

M40 M39

IN OUT

(M-11) (D-11)

(D-13)(M-13)



Tostation D

Fromstation B


Figure 3-16 Fiber connection at station C (ROADMWSD9+RMU9, direction 1)

MR2

OBU(D-10)

FIU(M-06) ODF

IN OUT RC OUT

TM2 RM

FIU(M-05)ODF

IN

RM1

OAU(D-01)

IN INTC

DCMTDC RDC

(D-06)SC2

LWF

D01 D02

(U-01) (U-02) (U-03) (U-04) (U-10) (U-11)(U-08) (U-09)IN IN IN IN OUT OUTOUT OUT

TX TX TX TX RX RXRX RX

West East

West East

LWF

LWF

LWF

LWF

LWF

LWF

LWF

WSD9

MR2

RMU9

DM1

EXPO

DM3DM2

EXPI

AM3AM1 AM2

OUT

A01 A02

TOAROA

IN OUT

(M-09)(M-04)

(M-01) (M-08)

TM


Tostation D

Fromstation B




Commissioning Guide


Figure 3-17 shows the fiber connection at station D (direction 1).

Figure 3-17 Fiber connection at station D (OLA, direction 1)

To station E

From station C

Variable attenuator


OAU(D-01)

FIU(D-09)

(D-06)SC2

ODFIN OUT RC OUT

TM2 RM

FIU(D-05)ODF

TCIN

RM1TM

DCMTDC RDC

West East

Figure 3-18 shows the fiber connection at station E (direction 1).

Figure 3-18 Fiber connection at station E (OTM, direction 1)

From station D

To client

equipment



(M-03)LWF

(M-04)LWF

(M-05)LWF

(M-06)LWF

(M-08)LWF

(M-09)LWF

(M-10)LWF

(M-11)LWF

(U-01)LWC1

(U-02)

OAU(D-12)

FIU(D-09)

(D-06)SC1

ODFODF

TX

TX

TX

TX

TX

TX

TX

TX

TX

TX

IN

IN

IN

IN

IN

IN

IN

IN

IN

IN LWC1

D40

D39

D38

D37

D36

D35

D34

D33

D32

D31

SCS(U-03)

TO11

TO12

TI1

INOUTINTCIN

RMTM

D40(M-13)

DCMTDC RDC

West East



Fiber Connection Diagram (Direction 2) Figure 3-19 shows the fiber connection at station E (direction 2).

Figure 3-19 Fiber connection at station E (OTM, direction 2)



From client

equipment

To station D

(M-03)LWF

(M-04)LWF

(M-05)LWF

(M-06)LWF

(M-08)LWF

(M-09)LWF

(M-10)LWF

(M-11)LWF

(U-01)LWC1

(U-02)

OBU(D-01)

FIU(D-09)

(D-06)SC1

ODFODF

RX

RX

RX

RX

RX

RX

RX

RX

RX

RX

OUT

OUT

OUT

OUT

OUT

OUT

OUT

OUT

OUT

OUT LWC1

M40

M39

M38

M37

M36

M35

M34

M33

M32

M31

SCS(U-03)

TO11

TO12

TI1

OUTINOUTRCOUT

TMRM

V40(M-02)

EastWest

Figure 3-20 shows the fiber connection at station D (direction 2).

Figure 3-20 Fiber connection at station D (OLA, direction 2)

Variable attenuator


To station C

From station E

OAU(D-12)

FIU(D-05)

(D-06)SC2

ODFINOUTRCOUT

TM1RM

FIU(D-09) ODF

TC IN

RM2 TM

DCMTDC

RDC

West East


Commissioning Guide


Figure 3-21, Figure 3-22, Figure 3-23 and Figure 3-24 show the fiber connection at station C (direction 2).

Figure 3-21 Fiber connection at station C (OADM, direction 2)



Tostation B

Fromstation D

To client equipmentFrom client equipment

OBU(D-03)

FIU(M-06)ODF

INOUTRCOUT

TM1RM

FIU(M-05) ODF

IN

RM2 TM

OAU(D-12)

INOUTIN TC

DCMTDC

RDC

MR2(M-09)

MOMR2(M-08)

INMR2(M-02)

MIMR2(M-01)

MI MOOUTOUT

(D-06)SC2

LWF

D01D02D01D02A01A02A01A02

(M-13)

LWF

(M-12)

LWF

(M-11)

LWF

(M-10)

LWF

(U-02)

LWF

(U-01)

LWF

(M-04)

LWF

(M-03)

West East

OUT OUTOUT OUT IN IN IN IN

TXTXTXTXRXRXRXRX

West East



Figure 3-22 Fiber connection at station C (ROADMDWC+DWC, direction 2)

M40

OAU(D-12)

FIU(M-06) ODF

OUT IN TC IN

RM2 TM

FIU(M-05)ODF

OUT

TM1RM

OUT OUTRC

DCMRDC

(D-06)SC2

LWF

D01 D02

(U-08) (U-09) (U-10) (U-11)IN IN IN INOUT OUTOUT OUT

TX TX TX TXRX RXRX RX

West East

West East

LWF

LWF

LWF

LWF

LWF

LWF

LWF

DWC

D40

DWCMI MO IN

M01M39

INOUT

M40 M38 M37 D40 D39 D38 D37

DROPADD

M40

(M-08)(U-01)

(M-13)(M-02)

(U-03) (U-04) (U-05) (U-06)

INOBU(D-03)

TDC



Fromstation D

Tostation B


In Figure 3-23, the D40 and WSD9 all locate in the lower subrack of the cabinets on the right.


Commissioning Guide


Figure 3-23 Fiber connection at station C (ROADMWSD9+WSM9, direction 2)

M40

FIU(M-06) ODF

IN INTC IN

RM2 TM

FIU(M-05)ODF

OUT

TM1RM

OUTRC

DCMTDC

(D-06)SC2

LWF

D40 D39

(U-08) (U-09) (U-10) (U-11)(U-01) (U-02) (U-03) (U-04)IN IN IN INOUT OUT OUT OUT

TX TX TX TXRX RX RX RX

West

West East

LWF

LWF

LWF

LWF

LWF

LWF

LWF

WSD9

D40

WSM9

DM1

EXPI

DM2

EXPO

AM1 AM2 AM3

OUT

M40 M39

INOUT

(D-04)(M-04)

(M-02) (D-02)

OAU(D-12)

RDC

OBU(D-03)

OUTIN

DM3



Fromstation D

To station B


Figure 3-24 Fiber connection at station C (ROADMWSD9+RMU9, direction 2)

MR2

FIU(M-06) ODF

IN

RM2 TM

FIU(M-05)ODF

OUT

TM1RM

INRC

(D-06)SC2

LWF

D01 D02

(U-08) (U-09) (U-10) (U-11)(U-03) (U-04)(U-01) (U-02)IN IN IN INOUT

TC

OUT OUT

TX TX TX TXRX RXRX RX

West East

West East

LWF

LWF

LWF

LWF

LWF

LWF

LWF

WSD9

MR2

RMU9

DM1

EXPI

DM3DM2

EXPO

AM3AM1 AM2

A01

TOAINOUT

(M-02) (M-11)

(M-08)(M-01)

OBU(D-03)

DCMTDCRDC

OAU(D-12)

INOUTINROA

OUT

A02

OUT

OUT

Fromstation D

To station B




Figure 3-25 shows the fiber connection at station B (direction 2).



Figure 3-25 Fiber connection at station B (OLA, direction 2)

Variable attenuator(X-nn): Subrack-slot. U indicates upper subrack. M indicates middle subrack. D indicates lower subrack.

To station A

From station C

OAU(D-12)

FIU(D-05)

(D-06)SC2

ODFINOUTRCOUT

TM1RM

FIU(D-09) ODF

TC IN

RM2 TM

DCMTDC

RDC

West East

Figure 3-26 shows the fiber connection at station A (direction 2).

Figure 3-26 Fiber connection at station A (OTM, direction 2)



From station B

To client

equipment

(M-03)LWF

(M-04)LWF

(M-05)LWF

(M-06)LWF

(M-08)LWF

(M-09)LWF

(M-10)LWF

(M-11)LWF

(U-01)LWC1

(U-02)

OAU(D-12)

FIU(D-09)

(D-06)SC1

ODF ODF

TX

TX

TX

TX

TX

TX

TX

TX

TX

TX

IN

IN

IN

IN

IN

IN

IN

IN

IN

INLWC1

D40

D39

D38

D37

D36

D35

D34

D33

D32

D31

SCS(U-03)

TO11

TO12

TI1

IN OUT IN TC IN

RM TM

D40(M-13)

DCMTDC

RDC

EastWest


Commissioning Guide


3.2 Requirements of Optical Power Commissioning Purpose z Describes the specific requirements of optical power

commissioning. z To ensure that the optical power commissioning are normally

performed.

Tools/Instruments None

User authority level None

Prerequisites The NE commissioning must be complete.

Required/As needed

Required

Set-up diagram None

The optical power commissioning serves to optimize the network performance parameter, ensure that there is a margin for the system optical power without affecting the expansion, and adjust the signal-to-noise ratio to the best value to ensure the long-term stable operation of the system.

The basic requirements of optical power commissioning are as follows:

z The optical power under commissioning should be between the permitted maximum and minimum values.

z Allowance is required to ensure that the power fluctuation within a range brings no impact on the services.

z Optical power commissioning should meet the requirement of system expansion from the customer.

3.2.1 EDFA Optical Amplifier Units For the parameters of each type of the EDFA optical amplifier in the OptiX BWS 1600G, refer to the OptiX BWS 1600G Backbone DWDM Optical Transmission System Product Description.

The requirements of the input optical power commissioning to each optical amplifier unit are the same.

Basic requirements of optical amplifier unit commissioning are as follows:

z Adjust the average per-channel input power of the optical amplifier unit and make it close to the standard per-channel input power. Standard per-channel input power = Maximum input optical power 10lgN, where N is the maximum number of wavelengths

z Adjust the average per-channel output power of the optical amplifier unit and make it close to the standard per-channel output power. Standard per-channel output power = Maximum output optical power 10lgN, where N is the maximum number of wavelengths

z If the average per-channel input power before the input end of the optical amplifier is added with a variable attenuator is higher than the standard per-channel input power,



adjust the variable attenuator before the amplifier to make the average per-channel input power reach the standard value.

z If the average per-channel input power before the input end of the optical amplifier is added with a variable attenuator is lower than the standard per-channel input power, remove the variable attenuator.

z To the E2OAU, set the variable optical attenuator (VOA) inside the board to adjust the output optical power of single wavelength to the standard value.

z To the E3OBU and E3OPU, the gain is fixed. After the input optical power is adjusted, the output optical power is obtained.

z To the E3OAU and E4OAU, set the gain on the T2000-LCT to make the output of the OAU reach the standard optical power. Gain to be set = Standard per-channel output power Average per-channel input power

z After the adjustment, the optical power of each channel on the optical amplifier unit must be within the range of standard optical power 2 dB.

3.2.2 Raman Amplifier Units For the parameters of each type of the Raman optical amplifier in the OptiX BWS 1600G, refer to the OptiX BWS 1600G Backbone DWDM Optical Transmission System Product Description.

Raman amplifiers extend the distance of a span and improve the signal-to-noise ratio. After the Raman amplifier is used, the optical power that is close to the fiber line should be tested on the LINE interface on the Raman amplifier. Shut down the lasers of the Raman amplifiers before the commissioning.

Raman amplifier emits strong light. Do not insert or remove the fiber connector when the laser is working, to avoid damage to human body.

The basic requirements of Raman amplifier unit are as follows:

z Test the optical power on the SYS interface of the Raman unit when the laser is enabled and when it is disabled. Determine the on-off gain of the Raman unit. On-off gain = Optical power on the SYS interface when the laser is enabled Optical power on the SYS interface when the Raman laser is disabled

z When the Raman amplifier is used in backward or forward pumping, the output optical power is rather great. The greater the optical power is, the higher the requirements of the fiber jumper become. Great optical power may bring damages to equipment and injuries to human body. Thus, the power of the Raman pumping light should be as low as possible on the premise that the on-off gain is not less than 10 dB. The maximum optical power should be not more than 27 dBm.

z Raman amplifier is used in the case of extremely low input optical power. When the SYS interface of the Raman amplifier is connected to the OAU, the input optical power of the OAU is still lower than the standard input optical power of single wavelength. Therefore, the VOA is not needed.


Commissioning Guide


z The requirement on the fiber line from the Raman unit lies on the single-point additional loss in the line cable. The following are the requirements of the single-point additional loss: 0 km20 km (0 mi.12 mi.): Do not use fiber connectors. 0 km10 km (0 mi.6 mi.): The single-point additional loss is less than 0.1 dB (G.652)

or 0.2 dB (G.655). 10 km20 km (6 mi.12 mi.): The single-point additional loss is less than 0.2 dB

(G.652) or 0.4 dB (G.655) and the single-point return loss is less than 40 dB. z The output optical power reaches 27 dBm when the Raman amplifier is used in

backward or forward pumping. Be careful of this. The fiber connector should be the special APC fiber connector. If the PC fiber connector is used, great reflection burns the fiber connector.

z As for the Raman unit used for backward pumping, the strong pump light enters the fiber through the input end (LINE) instead of the output end (SYS). Do not add any attenuator or fiber jumper before the input end.

z The bending radius of the fiber jumper should meet the requirement. The bending should not be too great; otherwise, the fiber jumper is burnt.

z The laser is by default to be turned off after the Raman amplifier is powered on. You can turn on the laser by issuing a command.

z Before the laser of the Raman amplifier is turned on, connect the fiber jumper of the input end and that of the ODF cabinet. Keep the fiber clean when removing or inserting the fiber. If there is dirt on the surface of the connector, the connector can be easily damaged.

z The Raman amplifier has a very strict requirement on the loss of the near-end line fiber. Such a fiber should have no connector within the distance of 0 km20 km (12 mi.) except that used to connect to the ODF. The fibers should be connected to each other by melting.

3.2.3 OTU For the parameters of each type of the OTU in the OptiX BWS 1600G, refer to the OptiX BWS 1600G Backbone DWDM Optical Transmission System Product Description.

The basic requirements of the optical power commissioning on the OTU are as follows:

z Adjust the input optical power of the OTU to a value between the receiver sensitivity and the overload point, at least 5 dBm less than the overload point and 3 dBm greater than the receiver sensitivity.

z The input optical power of the OTU is adjusted by adding or replacing the fixed attenuator.

Usually, internal fixed attenuators of the DWDM are equipped before delivery. Only needed to make an examination during the commissioning on site is required.

z Since the output optical power of the receive-end amplifier is required to be set to that of a single standard WDM wavelength, the fixed attenuator used on the WDM side of the receive-end OTU should be fixed according to this.

z The optical module used as the receiver on the client side is configured on the premise that the client equipment adopts the same optical module and is installed in the same equipment room. If the actual situation is not so, add, replace or remove the fixed attenuator based on the actual optical power.



z The transmitting optical power on the client side and WDM side of the OTU requires no commissioning.

Make sure the input optical power of the OTU (including the WDM side and line side) is lower than the receiver overload to avoid damage to the optical module during commissioning. Note the overload of the APD receiver laser is only 9 dBm.

3.2.4 OSC For the parameters of each type of the OSC board in the OptiX BWS 1600G, refer to the OptiX BWS 1600G Backbone DWDM Optical Transmission System Product Description.

The basic requirements of the optical power commissioning on the OSC are as follows:

z The optical power of the OSC should be within the range from 45 dBm to 15 dBm. z A 15 dB fixed attenuator is required for the interconnection between the OSCs in the

station.

3.2.5 Other Boards There are no requirements on the input and output optical power of other boards. Optical power commissioning on other boards bring only the power attenuation. Hence, for other boards, just check whether the insertion loss index meets the requirement.

For the parameters of other boards in the OptiX BWS 1600G, refer to the OptiX BWS 1600G Backbone DWDM Optical Transmission System Product Description.


Commissioning Guide


3.3 Optical Power Commissioning Procedures Purpose z Describes how to adjust the input optical power of OTUs and

optical amplifiers to the prescribed typical value. z To ensure that the optical power value in WDM system meets

the requirements of long term operation.

Tools/Instruments z Optical spectrum analyzer z Optical power meter z Flange z Fiber jumper z Signal analyzer (selected according to the actual service type),

such as SDH/SONET analyzer z Fixed optical attenuator z Variable optical attenuator

User authority level None

Prerequisites z The fiber connections must be correct. z All channels must be accessed with services or must be forced

to emit light, to make the OTU emits light normally.

Required/As needed

Required

Set-up diagram See section 3.1.3 "Optical Amplifier Configuration Diagram" and section 3.1.6 "Fiber Connection Diagram".

Before the OptiX BWS 1600G is connected to the line fiber in each station, you must: z Test the span loss to ensure the value is in accordance with the requirement of the

engineering design. z Test the transmission distance of the line signals to ensure the value is in accordance with

the requirement of the engineering design. z Check the type of the line fiber to ensure the value is in accordance with the requirement

of the engineering design. If any one of the above conditions is not met, the system commissioning will be affected. Thus, when the above conditions are not met, give feedback to the construction party who is in charge to solve the problem.

As mentioned in section 3.1.6 "Fiber Connection Diagram", there are two directions: direction 1 and direction 2. Because the commissioning in the two directions are performed in a similar way, only the commissioning in direction 1 is given. This section describes the optical power commissioning on each station along the following link direction.

A B C D E



After adjusting the optical power between the D40 and the OAU in the network commissioning, remove the 15 dB attenuator that is added according to the requirements in section 2.2.5 "Adding Attenuators".

3.3.1 Commissioning at Station A (OTM) Figure 3-11 shows the fiber connection at station A.

Step 1 Check if the fiber connection between boards is correct based on the fiber connection diagram and if the fiber on each board is well inserted. If not, correct the error immediately.

Step 2 Make the client sides of all OTUs access signals in either of the following two ways:

Make the client sides of all OTUs access the actual services. (recommended) Access the signals from the splitter and perform the commissioning after the

maximum number of services is configured. Access the signal from the splitter according to Figure 3-27. Go to Step 5.

Figure 3-27 Accessing signals from the splitter



(M-03)LWF

(M-04)LWF

(M-05)LWF

(M-06)LWF

(M-08)LWF

(M-09)LWF

(M-10)LWF

(M-11)LWF

(U-01)LWC1

(U-02)

OBU(D-01)

RX

RX

RX

RX

RX

RX

RX

RX

RX

RX

OUT

OUT

OUT

OUT

OUT

OUT

OUT

OUT

OUT

OUTLWC1

M40

M39

M38

M37

M36

M35

M34

M33

M32

M31

SCS(U-03)

TO11

TO12

TI1

OUT INV40(M-02)

SDH/SONETanalyzer Splitter

SDH/SONETanalyzer

Step 3 Obtain the information on the optical module of the OTU by observing the bar code on the front panel or the board manufacturing information. For this project, the client-side optical module of the LWF is S-64.2b module and that on the LWC1 is I-16 module.

Step 4 Ask the equipment engineer of the customer to provide the transmitting optical power and the optical module type of the equipment. Compare the optical power with the receiving optical power on the client side of the OTU to determine if the fixed attenuator should be adjusted. Record the receiving optical power on the client side of the OTU.

In Project G, we can learn from the OTU optical power commissioning requirements that the input optical power of the client-side RX should be within the range from 6 dBm to 11 dBm (LWF) or from 8 dBm to 15 dBm (LWC1). If the measured input optical power of the RX on the LWF and LWC1 without being added with an attenuator is 0 dBm and 5 dBm, add a 7 dB fixed attenuator to the LWC1 and LWF. After the attenuator is added, the measured optical power is 7 dBm and 12 dBm, which meets the requirements.


Commissioning Guide


Step 5 Check whether the WDM-side OUT interfaces on all OTUs emit lights or not. If not,

z Check whether the accessed SDH/SONET services are normal or not. If not, clear the fault first.

z Check whether the OTU having no services emits light and whether the laser on the OTU is enabled or not. If not, refer to section 2.11.2 to force the OTU to emit light and to enable the laser.

Step 6 Test the output optical power of the OUT interface on the OTU. The value should be within the range from 0 dBm to 5 dBm and is 2 dBm normally.

Step 7 Test the receiving optical power of the Mn interface of the V40 and record the value.

If the difference between the optical power and the optical power of the OUT interface on the OTU is greater than 1 dB, check the fiber routing and clean the fiber. Because the V40 is used in Project G, the principle of "observing the receive end and adjusting the transmit end" should be adopted during commissioning. Adjust the VOA of each channel on the V40 to ensure that the maximum difference of signal-to-noise ratio between channels is lower than 2 dB.

Step 8 Connect the optical spectrum analyzer to the OUT interface of the V40 by fiber jumper. Scan the output multiplexed signal, record the optical power of each channel and of the multiplexed signal, and determine the insertion loss of each channel on the V40. Check if the insertion loss after each channel passes the V40 meets the requirement.

For insertion loss parameters, refer to the OptiX BWS 1600G Backbone DWDM Optical Transmission System Product Description. If the output optical power does not meet the requirement, check if the Mn interface is connected to a wrong interface.

Step 9 Connect the fiber jumper which is to be inserted into the IN interface of the OBU to the optical spectrum analyzer. Scan the multiplexed signal. Adjust the mechanical variable attenuator before the OBU to make the average per-channel input power of the OBU be close to the standard per-channel input power (19 dBm).

Standard per-channel input power = Maximum input optical power 10lgN, where N is the maximum number of wavelengths

Attenuation of the variable attenuator = Input optical power of the IN interface on the OBU Output optical power of the OUT interface on the V40

Step 10 Test the output optical power of the OUT interface on the OBU. The standard per-channel input power of the E3OBUC03 is +4 dBm. Adjust the optical power of each channel and make it reach +4 dBm.

Step 11 Calculate the gain of each channel. The gain flatness should be less than 2 dB.

Gain of each channel = Per-channel output power Per-channel input power

Record the input/output optical power and gain of each channel and the input/output optical power of the multiplexed signal on the OBU.

Step 12 Use a power meter to test the optical power of the RC interface on the FIU and record the value.

If the difference between the optical power and the optical power of the OUT interface on the OBU is greater than 1 dB, check the fiber routing and clean the fiber.



Step 13 Test the optical power of the OUT interface on the FIU and determine the RC-OUT insertion loss.

RC-OUT insertion loss on the FIU = Input optical power of the RC on the FIU Optical power of the OUT on the FIU

Test the optical power of the OUT interface on the FIU when RM is disconnected. For the insertion loss requirement, refer to the OptiX BWS 1600G Backbone DWDM Optical Transmission System Product Description.

Step 14 Test the optical power of the TM interface on the SC1 and the RM interface on the FIU, and calculate the RM-OUT insertion loss.

RM-OUT insertion loss on the FIU = Optical power of the RM on the FIU Optical power of the OUT on the FIU (disconnect RC interface)

Test the optical power of the OUT interface on the FIU when RC is disconnected. For the insertion loss requirement, refer to the OptiX BWS 1600G Backbone DWDM Optical Transmission System Product Description.

During the commissioning, ensure that the fiber jumper for test and the optical interface and fiber jumper that have ever been removed are clean. Make sure that there is no impact on the system. For details on how to clean fiber connectors, refer to Appendix A "Inspecting and Cleaning the Fiber-Optic Connection" in the OptiX BWS 1600G Backbone DWDM Optical Transmission System Troubleshooting.

----End

3.3.2 Commissioning at Station B (OLA) Figure 3-12 shows the fiber connection at station B.

Commissioning at station B is simpler than that at station A. The commissioning of supervisory channels is similar to that at station A. Beside this, only the commissioning of the optical power is required.


Step 2 Use an optical power meter to test the optical power of the IN interface at 1510 nm on the west FIU (L-05). Compare the value with the optical power of the OUT interface at 1510 nm

on the east FIU at station A and the A B line loss is obtained. Record the loss.

Step 3 Test the output optical power of the TM on the west FIU. Calculate the IN-TM insertion loss.

IN-TM insertion loss of the west FIU = Optical power of the IN interface at 1510 nm on the FIU Optical power of the TM interface at 1510 nm on the FIU

Step 4 Test the input optical power of the RM1 and the output optical power of the TM2 on the SC2.


Commissioning Guide


Step 5 Test the optical power of the RM and the OUT interface on the east FIU (L-09). Calculate the RM-OUT insertion loss.

RM-OUT insertion loss of the east FIU = Optical power of the RM interface at 1510 nm on the FIU Optical power of the OUT interface at 1510 nm on the FIU

Record the optical power of the supervisory signal, the IN-TM insertion loss of the west FIU, and the RM-OUT insertion loss of the east FIU. For the parameters of optical power and insertion loss, refer to the OptiX BWS 1600G Backbone DWDM Optical Transmission System Product Description.

Step 6 Test the output optical power of the TC on the west FIU and calculate the IN-TC insertion loss.

IN-TC insertion loss on the FIU = Optical power of a certain channel in IN interface on the FIU Optical power of a certain channel in TC interface on the FIU

The received signals contain supervisory signals and main channel signals, and there is impact from the noise. To avoid having incorrect test result, perform the test on a certain channel.

Step 7 Test the input optical power of the west OAU (L-01). Adjust the variable attenuator before the OAU to make the input optical power on IN interface reach 19 dBm. Record the optical power of each channel in IN interface on the OAU.

Step 8 Connect the optical spectrum analyzer to the OUT interface of the OAU by fiber jumper. Scan the multiplexed signal. Adjust the OAU gain on the T2000-LCT and make the per-channel output power of the OAU reach the standard value.

The standard value of the OAU per-channel output power is +4 dBm. Normally, a value close to +4 dBm is required to be the optical power of each channel.

Gain to be set = Standard per-channel output power Average per-channel input power

Step 9 Calculate the gain of each channel on the OAU. The gain flatness should be less than 2 dB.

Gain of each channel = Per-channel output power Per-channel input power

Record the input/output optical power and gain of each channel and the input/output optical power of the multiplexed signal on the OAU.

Step 10 Test the input and output optical power of the DCM and calculate the DCM insertion loss.

DCM insertion loss = DCM input optical power DCM output optical power

Step 11 Use an optical power meter to test the optical power of the RC interface on the FIU and record the value.

If the difference between the optical power and the optical power of the OUT interface on the OAU is greater than 1 dB, check the fiber routing and clean the fiber.

Step 12 Test the optical power of the OUT interface on the east FIU and calculate the RC-OUT insertion loss.



RC-OUT insertion loss on the FIU = Input optical power of the RC on the FIU Optical power of the OUT on the FIU

Test the optical power of the OUT interface on the FIU when RM is disconnected. For the insertion loss requirement, refer to the OptiX BWS 1600G Backbone DWDM Optical Transmission System Product Description.

----End

3.3.3 Commissioning at Station C (OADM/ROADM) Figure 3-13 shows the fiber connection at station C.

In engineering practice, if station C is of ROADM, refer to the "Commissioning at the ROADMDWC+DWC Station", "Commissioning at the ROADMWSD9+WSM9 Station", and "Commissioning at the ROADMWSD9+RMU9 Station" for commissioning at station C.


Step 2 Test the optical power of the west FIU and the SC2 by referring to section 3.3.2 "Commissioning at Station B (OLA)".

Step 3 Perform the commissioning on the west OAU by referring to section 3.3.2 "Commissioning at Station B (OLA)".

Step 4 Test the receiving optical power of the IN interfaces of all west LWFs respectively and record all the values.

Step 5 Connect the optical power meter to the IN interface of the LWF with the largest optical power.

Step 6 After the commissioning of the west receiving optical amplifier is complete, adjust the variable attenuator between the west OAU and the MR2. Make the input optical power of the IN interface on the west LWF that has the highest receiving optical power reach 8 dBm, to ensure that the input optical power of the IN interfaces on all the west LWFs is within the range from 6 dBm to 10 dBm.

Step 7 Test the optical power of the IN interface on the first west MR2 and calculate the insertion loss of the attenuator.

Insertion loss of the attenuator = Output optical power of the receiving optical amplifier OAU Input optical power of the IN interface on the MR2

For the parameters of optical power and insertion loss, refer to the OptiX BWS 1600G Backbone DWDM Optical Transmission System Product Description.

Step 8 Test the output optical power of the D01/D02/MO interface on the first west MR2 and calculate the wavelength dropping insertion loss and the passthrough insertion loss.

Wavelength dropping insertion loss = Per-channel input power of dropping wavelengths on the IN interface on the MR2 Output optical power of the D01/D02 interface on the MR2

Passthrough insertion loss = Per-channel input power of passthrough wavelengths on the IN interface on the MR2 Per-channel output power of passthrough wavelengths on the MO interface on the MR2


Commissioning Guide


Step 9 Repeat Steps 4 to 8 to complete the commissioning on the second west MR2.

Step 10 Use a spectrum analyzer to test the input optical power of the east OBU. Adjust the variable attenuator between the west MR2 and the east MR2, to make the average input optical power of the passthrough wavelengths in the input optical power of the east transmitting optical amplifier OBU reach the standard value.

Step 11 Test the client-side transmitting optical power of the west LWF. There are the following two situations:

z If the client equipment is also newly installed, connect the LWF to the client equipment for test.

z If the client equipment is not connected, use a fiber to connect on the ODF the client-side TX interface on the west LWF through a fixed optical attenuator to the client-side RX interface on the east LWF of station C.

The client side of the LWF is connected to the client equipment normally after the commissioning. The interconnection of the LWFs is for the testing of 24-hour bit errors in serial after an SDH/SONET analyzer connects to station A after the commissioning.

Step 12 Test the optical power of the adding wavelengths on the east LWFs.

Step 13 Use a spectrum analyzer to test the input optical power of the east OBU. Adjust the variable attenuator of each OTU and make the input optical power of the wavelength on the east OBU reach the standard value.

Step 14 Test the optical power of the MI/A01/A02 and OUT interfaces on the east MR2 and calculate the wavelength adding insertion loss and the passthrough insertion loss.

Wavelength adding insertion loss = Optical power of the A01/A02 interface on the MR2 Per-channel power of adding wavelengths on the OUT interface on the MR2

Passthrough insertion loss = Per-channel power of passthrough wavelengths on the MRI interface on the MR2 Per-channel power of passthrough wavelengths on the OUT interface on the MR2


Step 15 Perform the commissioning on the east OBU by referring to section 3.3.1 "Commissioning at Station A (OTM)".

Step 16 Perform the commissioning on the east FIU by referring to section 3.3.2 "Commissioning at Station B (OLA)".

----End



Commissioning at the ROADMDWC+DWC Station Figure 3-14 shows the fiber connection diagram of an ROADM station that adopts two DWCs.




Step 4 Set on the T2000 the west DWC as follows:

z Set wavelengths that pass through from west to east to passthrough state. z Set the west-dropped and unused wavelengths to blocked state.

For the method of setting wavelength states, refer to the OptiX BWS 1600G Backbone DWDM Optical Transmission System Configuration Guide.

Step 5 Measure the single-wavelength input optical power at the IN interface and the single-wavelength output optical power at the MO and DROP interfaces of the west DWC. Calculate the insertion loss of wavelengths dropped from IN to DROP and the insertion loss of wavelengths that pass through IN to MO of the DWC.

Wavelength drop insertion loss = Single-drop-wavelength input optical power at the IN interface of the DWC Single-drop-wavelength output optical power at the DROP interface of the DWC

Wavelength passthrough insertion loss = Single-passthrough-wavelength input optical power at the IN interface of the DWC Single-passthrough-wavelength output optical power at the MO interface of the DWC.


Step 6 Use a spectrum analyzer to measure the single-wavelength input optical power at the IN interface and the single-wavelength output optical power at the Dn interface of the west D40. Calculate the insertion loss of the D40.

Per-channel insertion loss of the D40 = Single-wavelength input optical power at the IN interface of the D40 Single-wavelength output optical power at the Dn interface of the D40

Step 7 Measure the input optical power at the IN interface of all the west LWFs. The measured input optical power at the IN interface of all the west LWFs should be about 8 dBm that is within the stipulated optical power range of 6 dBm to 10 dBm.

As for the OTU whose WDM side is a 2.5 Gbit/s APD receiver, add a 10 dB fixed optical attenuator to the IN interface to obtain about 18 dBm optical power that is within the stipulated optical power range of 16 dBm to 22 dBm.



Commissioning Guide





Step 9 Use a spectrum analyzer to measure the input optical power of the east OBU. Set on the T2000 the VOA that corresponds to each wavelength passing through the west DWC to adjust the input optical power of each passthrough wavelength of the OBU to 19 dBm.

The single-wavelength input optical power of the OBU permits a tolerance of 1 dB; however, the average of optical power of all the wavelengths input to the OBU should be 19 dBm.

Step 10 Measure the optical power at the Rx interface of the east LWF. Add, replace or remove a fixed optical attenuator to obtain 6 dBm through 11 dBm input power at the Rx interface of the LWF board.

Optical interfaces of the LWF used in this network scenario are of S-64.2b type. For client-side specifications of other types of OTUs, refer to the OptiX BWS 1600G Backbone DWDM Optical Transmission System Product Description.

Step 11 Measure the output optical power at the OUT interface of the east LWF. This value should be from 0 dBm to 5 dBm, usually about 2 dBm.

Step 12 Use a spectrum analyzer to measure the single-wavelength received optical power at the Mn interface and the single-wavelength output optical power at the OUT interface of the east M40. Calculate the insertion loss of the M40.


Step 13 Use a spectrum analyzer to measure the input optical power at the IN interface of the east OBU. Tune the VOA between the M40 and DWC to adjust the input optical power of each add wavelength of the OBU to 19 dBm.


Step 14 Measure the single-wavelength input optical power at the MI and ADD interfaces and the single-wavelength output optical power at the OUT interface of the east DWC. Calculate the insertion loss of wavelengths added from ADD to OUT and the insertion loss of wavelengths that pass through MI to OUT of the DWC.

Wavelength add insertion loss = Single-add-wavelength input optical power at the ADD interface of the DWC Single-add-wavelength output optical power at the OUT interface of the DWC

Wavelength passthrough insertion loss = Single-passthrough-wavelength input optical power at the MI interface of the DWC Single-passthrough-wavelength output optical power at the OUT interface of the DWC






----End

Commissioning at the ROADMWSD9+WSM9 Station Figure 3-15 shows the fiber connection diagram of an ROADM station that adopts the combination of WSD9 and WSM9.




Step 4 On the T2000, create three optical cross-connections: from the west FIU to the WSD9, from the west FIU to the east FIU, and from the WSM9 to the east FIU.

For the method of creating optical cross-connections, refer to the OptiX BWS 1600G Backbone DWDM Optical Transmission System Configuration Guide.

Step 5 Measure the single-wavelength input optical power at the IN interface and the single-wavelength output optical power at the DMn and EXPO interfaces of the west WSD9. Calculate the insertion loss of wavelengths dropped from IN to DMn and the insertion loss of wavelengths that pass through IN to EXPO of the DWC.

Wavelength drop insertion loss = Single-drop-wavelength input optical power at the IN interface of the WSD9 Single-drop-wavelength output optical power at the DMn interface of the WSD9

Wavelength passthrough insertion loss = Single-passthrough-wavelength input optical power at the IN interface of the WSD9 Single-passthrough-wavelength output optical power at the EXPO interface of the WSD9


Step 6 Use a spectrum analyzer to measure the single-wavelength input optical power at the IN interface and the single-wavelength output optical power at the Dn interface of the west D40. Calculate the insertion loss of the D40.

Per-channel insertion loss of the D40 = Single-wavelength input optical power at the IN interface of the D40 Single-wavelength output optical power at the Dn interface of the D40


Commissioning Guide


Step 7 Set on the T2000 the VOAs that correspond to the west wavelength drop channels respectively of the west WSD9 to obtain 8 dBm input optical power at the IN interface of each west LWF.






Step 9 Set on the T2000 the VOA that corresponds to each wavelength passing through the west WSD9 to adjust the attenuation to 0.

Step 10 Use a spectrum analyzer to measure the input optical power of the east OBU. Set on the T2000 the VOA that corresponds to each wavelength passing through the east WSM9 to adjust the input optical power of each passthrough wavelength of the OBU to 19 dBm.





Step 13 Use a spectrum analyzer to measure the single-wavelength received optical power at the Mn interface and the single-wavelength output optical power at the OUT interface of the east M40. Calculate the insertion loss of the M40.


Step 14 Use a spectrum analyzer to measure the input optical power at the IN interface of the east OBU. Set on the T2000 the VOA that corresponds to each wavelength of the WSM9 to adjust the input optical power of each add wavelength of the OBU to 19 dBm.




Step 15 Measure the single-wavelength input optical power at the EXPI and AMn interfaces and the single-wavelength output optical power at the OUT interface of the east WSM9. Calculate the insertion loss of wavelengths added from AMn to OUT and the insertion loss of wavelengths that pass through EXPI to OUT of the WSM9.

Wavelength add insertion loss = Single-add-wavelength input optical power at the AMn interface of the WSM9 Single-add-wavelength output optical power at the OUT interface of the WSM9

Wavelength passthrough insertion loss = Single-passthrough-wavelength input optical power at the EXPI interface of the WSM9 Single-passthrough-wavelength output optical power at the OUT interface of the WSM9

For the parameters of optical power and insertion loss, refer to the OptiX BWS 1600G Backbone DWDM Optical Transmission System Product Description. The insertion loss measured in the preceding step includes the VOA attenuation, which differs from that measured when the VOA attenuation is set to 0.



----End

Commissioning at the ROADMWSD9+RMU9 Station Figure 3-16 shows the fiber connection diagram of an ROADM station that adopts the combination of the WSD9 and RMU9.




Step 4 On the T2000, create an optical cross-connection from the west FIU to the WSD9.

In the ROADM station comprising the WSD9 and the RMU9 boards, the wavelengths added by the RMU9 board do not need to be configured. In this case, just correctly establish physical fiber connections. For the method of creating optical cross-connections, refer to the OptiX BWS 1600G Backbone DWDM Optical Transmission System Configuration Guide.

Step 5 Measure the single-wavelength input optical power at the IN interface and the single-wavelength output optical power at the EXPO and DMn interfaces of the west WSD9. Calculate the insertion loss of wavelengths dropped from IN to DMn and the insertion loss of wavelengths that pass through IN to EXPO of the west WSD9.


Commissioning Guide


Wavelength drop insertion loss = Single-drop-wavelength input optical power at the IN interface of the WSD9 Single-drop-wavelength output optical power at the DMn interface of the WSD9

Wavelength passthrough insertion loss = Single-passthrough-wavelength input optical power at the IN interface of the WSD9 Single-passthrough-wavelength output optical power at the EXPO interface of the WSD9


Step 6 Use a spectrum analyzer to measure the single-wavelength input optical power at the IN interface and the single-wavelength output optical power at the Dn interface of the west MR2. Calculate the insertion loss of the MR2.

Step 7 Set on the T2000 the VOAs that correspond to the west wavelength drop channels respectively of the west WSD9 to obtain 8 dBm input optical power at the IN interface of each west LWF.






Step 9 Use a spectrum analyzer to measure the input optical power of the east OBU. Set on the T2000 the VOA that corresponds to each wavelength passing through the west WSD9 to adjust the input optical power of each passthrough wavelength of the OBU to 19 dBm.







Step 12 Use a spectrum analyzer to measure the input optical power at the IN interface of the east OBU.

z As for wavelengths directly added through the RMU9, set on the T2000 the VOA that corresponds to each optical interface of the RMU9 to adjust the input optical power of each add wavelength of the OBU to 19 dBm.


z As for wavelengths added through the RMU9 after the wavelengths are multiplexed by the MR2, perform the following substeps:

1. Set the attenuation of the corresponding RMU9-imbedded VOA connected to the MR2 to 3 dB.

2. Set the VOA attenuation between the MR2 and LWF to the minimum. 3. Find out the smallest one among the input optical power values of wavelengths added

through the MR2 to the IN interface of the OBU. Adjust the optical power of each of the other wavelengths to this smallest value to flatten the optical power.

4. Set the attenuation of the corresponding RMU9-imbedded VOA connected to the MR2 to obtain 19 dBm per-channel optical power of wavelengths added through the MR2.

Step 13 Use a spectrum analyzer to measure the single-wavelength received optical power at the An interface and the single-wavelength output optical power at the OUT interface of the east MR2. Calculate the insertion loss of the MR2.


Step 14 Measure the single-wavelength input optical power at the EXPI and AMn interfaces and the single-wavelength output optical power at the OUT interface of the east RMU9. Calculate the insertion loss of wavelengths added from AMn to OUT and the insertion loss of wavelengths that pass through EXPI to OUT of the RMU9.

Wavelength add insertion loss = Single-drop-wavelength input optical power at the AMn interface of the RMU9 Single-add-wavelength output optical power at the OUT interface of the RMU9

Wavelength passthrough insertion loss = Single-passthrough-wavelength input optical power at the EXPI interface of the RMU9 Single-passthrough-wavelength output optical power at the OUT interface of the RMU9




----End


Commissioning Guide


3.3.4 Commissioning at Station D (OLA) Figure 3-17 shows the fiber connection at station D.

The commissioning at station D is similar to that at station B. For details, refer to section 3.3.2 "Commissioning at Station B (OLA)".

3.3.5 Commissioning at Station E (OTM) Figure 3-18 shows the fiber connection at station E.


Step 2 Test the optical power of the FIU and the SC1 by referring to section 3.3.1 "Commissioning at Station A (OTM)".

Step 3 Perform the commissioning on the OAU by referring to section 3.3.2 "Commissioning at Station B (OLA)".

Step 4 Connect the fiber jumper which is to be inserted into the IN interface of the D40 to optical spectrum analyzer. Scan the multiplexed signal and record the optical power of each channel.

Step 5 Test the optical power of each channel on the Dn interface on the D40 and calculate the insertion loss of each channel on the D40.

Insertion loss of each channel = Optical power of each channel on the IN interface on the D40 Optical power of each channel on the Dn interface on the D40


Step 6 Test the optical power of the WDM-side input interface (IN) on the OTU.

In Project G, we can learn from the OTU optical power commissioning requirements that the input optical power of the WDM-side IN should be within the range from 6 dBm to 10 dBm (LWF) or from 5 dBm to 15 dBm (LWC1). If the measured input optical power does not meet the requirements, add, replace or remove the fixed attenuator based on the measured value to ensure that the receiving optical power of the OTU is within the required range.

Step 7 Test the client-side transmitting optical power of the west OTU. There are the following two situations:

z If the client equipment is also newly added to the network, it can be the client equipment that tests the services for 24 hours after the OptiX BWS 1600G connects to the client equipment.

z If the OptiX BWS 1600G connects to no client equipment, the client-side TX interface and the RX interface on the OTU at station E must be connected on the ODF after they pass the fixed attenuator.

The client s

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