Foreword

ThiscodewascompletedbyChinaMobileGroupDesignInstitute,Co.,Ltd.andinconjunctionwithotherorganizationsinaccordancewiththerequirementsofDocumentJIANBIAO〔2011〕NO.17issuedbytheMinistryofHousingandUrbanandRuralDevelopment-NoticeonPrintingtheeDevelopmentandRevisionPlanofNationalEngineeringConstructionStandardsin2011.

Inthepreparationprocessofthiscode,thedraftingteamconductedin-depthresearchandinvestigation,carefullyreviewedtheapplicationanddevelopmentofWDMtechnologies,solicitedopinionsfromrelevantorganizationsandexpertsnationwide,andconsultednumerousrelevantdomesticandinternationalstandardsandregulationsbeforefinalizingthedraft.

Thecodecomprises9chapterswiththemaintechnicalcontentsincludingthefollowing:generalprovisions;termsandAbbreviations;systemconfigurationandCategorization;transmissionsystemdesign;auxiliarysystems;networkprotection;transmissionsystemperformance;selectionandconfigurationofequipmentandequipmentinstallation.

TheMinistryofHousingandUrban-RuralDevelopmentisinchargeoftheadministrationofthiscode;theMinistryofIndustryandInformationTechnologyisresponsibleforitsroutinemanagement;andChinaMobileGroupDesignInstituteCo.,Ltd.isresponsiblefortheclarificationofspecifictechnicalcontents.Duringtheprocessofimplementingthiscode,userssuggestionsandfeedback,whenevernecessary,shouldbesubmittedtoChinaMobileGroupDesignInstituteCo.,Ltd.(Address:16A,DanlingStreet,HaidianDistrict,Beijing,China,Postcode;100080)andsuchsuggestionsandfeedbackwillbeusedasreferenceforfuturerevision.

Chiefdevelopmentorganization,participatingdevelopmentorganizations,chiefdraftingstaffandchiefreviewersofthiscode,translatorsandtranslationproofreadersarelistedasbelow:

ChiefDevelopmentOrganization:

ChinaMobileGroupDesignInstituteCo.,Ltd.

ParticipatingDevelopmentOrganizations:

GuangdongPlanningandDesigningInstituteofTelecommunicationsCo.,Ltd.

ShanghaiPostsandTelecommunicationsDesigningConsultingInstituteCo.,Ltd.

ChiefDraftersStaff:

LiuJiangpingGaoJunshiXiJianhuaLiYongWangYingchun

WangYunJiangShuzhenChenRuquanZhangYun

ChiefReviewers:

WangJunhuaLiuQiZhangGuoxinZouHongqiangYangTierong

ShenLiangYuanHaitaoHuangWeiminPanYaoxiWeiXianhu

Translators:

LiuJiangpingGaoJunshiXiJianhuaLiYongWangYingchun

WangJiameng

TranslationProofreaders:

WangJunhuaWangQi

·1·

Contents

1GeneralProvisions (1)

2TermsandAbbreviations (2)

2.1Terms (2)

2.2Abbreviations (3)

3SystemConfigurationandCategorization (5)

3.1CharacteristicsofWDMSystem (5)

3.2SystemConfiguration (5)

3.3AplicationCodes (6)

3.4CentralWavelengthAllocation (8)

3.5ainPatTnterface (11)

3.6OTUInterface (12)

3.7OpicalSupervisoyChane! (14)

4TransmissionSystemDesign (15)

4.1Station (15)

4.2FiberandDesignofMultipleSecion (15)

4.3DispersionCompensationandOtherTechnologies (16)

4.4ChannelAssignment (16)

5AuxiliarySystems (17)

5.1NetworkManagementSysem (17)

5.2EngineringOrderWire (18)

6NetworkProtection (19)

6.1NetworkTopology (19)

6.2Prptection (19)

7TransmissionSystemPerformance (20)

7.1OpticalSignal-to-noiseRatio (20)

7.2BitError (21)

7.3Jitter (23)

8SelectionandConfigurationofEquipment (24)

8.1SelectionofEquipment (24)

8.2ConfigurationofEquipment (24)

9EquipmentInstallation (26)

9.1In-stationCommunicationSystem (26)

9.2StationLayoutandEquipmentArrangement (26)

9.3EquipmentandCableRackInstallation (27)

9.4CableandWiring (27)

9.5PowerSupplySystemandGrounding (28)

·2·

9.6EquipmentRoomEnvironmentalConditions (29)

ExplanationofWordinginThisCode (30)

ListofQuotedStandards (31)

·1·

1GeneralProvisions

1.0.1Thiscodeisformulatedwithaviewtounifyandstandardizetheengineeringdesignofwavelengthdivisionmultiplexing(WDM)opticalfibertransmissionsystemsinordertoachieveadvancedtechnology,safetyandreliability,economyandrationality,energysavingandenvironmentalprotection.

1.0.2Thiscodeisapplicabletotheengineeringdesignofsingle-fiberunidirectionalC-bandopenDWDMsystemsandsingle-fiberunidirectionalopenCWDMsystems.

1.0.3Engineeringdesignshallbecarriedoutbasedonoverallplanning,jointconstruction,andresourcesharingtomeettherequirementofbuildinga_resource-conservationandenvironmental-friendlysociety.

1.0.4Onthebasisofensuringcommunicationquality,multipleengineeringdesignschemesshallberaisedandcomparedsoastoenhanceeconomiceficiencyandreduceprojectcost.

1.0.5WDMopticalfibertransmissionsystemengineeringdesignshallcomplywithnotonlytherequirementsstipulatedinthiscode,butalsothoseinthecurrentrelevantonesofthenation.

·2·

2TermsandAbbreviations

2.1Terms

2.1.1C-bandconventionalband

C-bandreferstothewavelengthbandof1530nm-1565nm.

2.1.2L-bandlongwavelengthband

L-bandreferstothewavelengthbandof1565nm-1625nm.

2.1.3Opticalchannel

Intheopticalmultiplexsection,anopticalchannelisapassagethroughwhichopticalsignalsareunidirectionallytransmitted.

2.1.4Nominalcentralfrequency(wavelength)

Anominalcentralfrequency(wavelength)isdefinedasafrequency(wavelength)allocatedatacertainfrequencyintervalintheWDMsystem,with193.10THz(1552.52nmvacuumwavelength)asthereferencefrequency(wavelength).

2.1.5Opticalpath

Anopticalpathisanall-inclusivefacihityfortransmittingspecificservicesignalsbetweenthesourcepointanddestinationpointWDMequipmentclientinterfaces.

2.1.6Opticalboosteramplifier

AnopticalboosteramplifierisanopticalamplifierusedbehindthemultiplexerofthetransmitteroftheWDMsystemtoboostthesystem'stransmittingopticalpower.

2.1.7Opticalpre-amplifier

Anopticalpre-amplifierisanopticalamplifierusedinfrontofthedemultiplexerofthereceiveroftheWDMsystemtoimprovesignalreceptionsensitivity.

2.1.8Opticallineamplifier

Anopticallineamplifierisanopticalamplifierusedbetweenpassiveopticalfibersegmentstocompensateforfiberlossandextendthelengthofpassiverelaytransmission.

2.1.9Opticalamplifierspan

Anopticalamplifierspanisatransmissionentitybetweenadjacentopticallineamplifierstations(OLAstations),orbetweenanopticalterminalmultiplexerstation(OTMstation)andtheadjacentOLAstation,orbetweenanopticaladd-dropmultiplexerstation(OADMstation)andtheadjacentOLAstation,constitutingatransmissionspanusedtoextendthedistanceofpassiverelay.

2.1.10Opticalmultiplexsection

AnopticalmultiplexsectionisatransmissionsegmentwithelectricalregenerativerelayfunctionsbetweenadjacentOTMstationsorOADMstations,orbetweenanOTMstationandtheadjacentOADMstation.

2.1.11Ramanamplifier

ARamanamplifierisanopticalamplifierusedtoamplifysignalsbasedonthestimulatedRamanscattering(SRS)effectofthetransmissionfibersoftheWDMsystem.

2.1.12(Optical)coherentdetection

·3·

(Optical)coherentdetectionreferstodetectingandreceivingcarriersignals'phaseinformationbymeansofcoherentlymixingthelocalopticalcarriersignalandtheopticalcarriersignalsofthesamefrequencyinthereceivingdevice.

2.1.13Ultra-long-haulDWDMsystem

Anultra-long-haulDWDMsystemisamulti-span40/80×10GDWDMsystemwithatargetdistanceofmorethan1000km,orasingle-span40/80×10GDWDMsystemwithatargetdistanceofmorethan160km.

2.1.14Receiveropticalsignalnoiseratiotolerance

InaWDMsystem,receiveropticalsignalnoiseratiotolerancereferstotheminimumtolerableOSNRvalueatthepointSn(orR)whereanopticaltransponderunit(OTU)isdirectlyconnectedtothereferencereceiverwhenthemaximumapplicablebiterrorratio(e.g:1×10-12)isreachedafterreferencereceiver'serrorcorrection.

2.2Abbreviations

Symbol

Englishname

Chinesenameorinterpretation

ALS

AutomaticLaserShutdown

自動激光關(guān)斷

APR

AutomaticPowerReduction

自動光功率減少

ASON

AutomaticallySwitchedOpticalNetwork

自動交換光網(wǎng)絡(luò)

BBER

BackgroundBlockErrorRatio

背景誤塊比

BOL

BeginofLife

壽命初始

BTB

Back-to-back

背靠背

CMI

CodedMarkInversion

傳號反轉(zhuǎn)碼

CORBA

CommonObjectRequestBrokerArchitecture

公共對象請求代理體系

CWDM

CoarseWavelengthDivisionMultiplexing

粗波分復(fù)用

DCM

DispersionCompensationModule

色散補償模塊

DCN

DataCommunicationNetwork

數(shù)據(jù)通信網(wǎng)

DGD

DifferentialGroupDelay

差分群時延

DWDM

DenseWavelengthDivisionMultiplexing

密集波分復(fù)用

DP-QPSK

DualPolarizationQuadraturePhaseShiftKeying

雙極化正交相移鍵控

RZ-DQPSK

ReturntoZero-differential

QuadraturePhaseShiftKeying

歸零差分正交相移鍵控

EMS

ElementManagementSystem

網(wǎng)元管理系統(tǒng)

EOL

EndofLife

壽命終了

FEC

ForwardErrorCorrection

前向糾錯

HRP

HypotheticalReferencePath

假設(shè)參考通道

LAN

LocalAreaNetwork

局域網(wǎng)

LCT

LocalCraftTerminal

本地維護終端

MPI

MainPathInterface

主光通道接口

NMS

Network-levelManagementSystem

網(wǎng)絡(luò)(級)管理系統(tǒng)

NRZ

Non-returntoZero

非歸零(碼)

OA

OpticalAmplifier

光放大器

·4·

OADM

OpticalAdd-dropMultiplexer

光分插復(fù)用器

OCHP

OpticalChannelProtection

光通路保護

ODB

OpticalDuobinary

光雙二進制碼

ODF

OpticalDistributionFrame

光纖配線架

OD(U)

OpticalDe-multiplexer(Unit)

光分波(解復(fù)用)器(單元)

ODUk

OpticalChannelDataUnit-k

光通路數(shù)據(jù)單元k

OLA

OpticalLineAmplifier

光線路放大器

OLP

OpticalLineProtection

光線路保護

OM(U)

OpticalMultiplexerUnit

光合波(復(fù)用)器(單元)

OMSP

OpticalMultiplexSectionProtection

光復(fù)用段保護

OSC

OpticalSupervisoryChannel

光監(jiān)控通路

OSNR

OpticalSignal-to-noiseRatio

光信噪比

OTM

OpticalTerminalMultiplexer

光終端復(fù)用器

OTN

OpticalTransportNetwork

光傳送網(wǎng)

OTU

OpticalTransponderUnit

光轉(zhuǎn)換單元(波長轉(zhuǎn)換器)

OTUk

OpticalChannelTransportUnit-k

光通路傳送單元k

P-DPSK

PartialDifferentialPhaseShiftKeying

部分差分相移鍵控

PMD

PolarizationModeDispersion

偏振模色散

PSBT

Phase-shapedBinaryTransmission

相位整形二進制傳輸

(R)OADM

(Reconfigurable)OpticalAdd/DropMultiplexer

(可重構(gòu))光分插復(fù)用器

RZ

ReturntoZero

歸零(碼)

RZ-AMI

Return-to-zeroAlternateMarkInversion

歸零型信號交替翻轉(zhuǎn)

SDH

SynchronousDigitalHierarchy

同步數(shù)字體系

SESR

SeverelyErroredSecondRatio

嚴重誤塊秒比

SNMS

Sub-networkManagementSystem

子網(wǎng)管理系統(tǒng)

STM

SynchronousTransportModule

同步傳送模塊

WAN

WideAreaNetwork

廣域網(wǎng)

WDM

WavelengthDivisionMultiplexing

波分復(fù)用

·5·

3SystemConfigurationandCategorization

3.1CharacteristicsofWDMSystem

3.1.1WDMsystemsarecategorizedintodenseWDM(DWDM)systemsandcoarseWDM(CWDM)systems.

ForaDWDMsystem,thechannelspacingshouldbe0.4nmor0.8nmandthenumbeofopticalchannelsinthebandof1530nm-1565nmmaybe40or80.ForaCWDMsystem,thechannelspacingshouldbe20nmandthenumberofopticalchannelsinthebandof1270nm-1610nmmaybe4,8or16.

3.1.2ThetypesofclientinterfacesforaWDMsystemshallbeinaccordancewiththosespecifiedinTable3.1.2.

Table3.1.2TypesofclientinterfacesforaWDMsystem

Typesofclientinterfaces

Signaltype

SDHinterface

STM-N(N=1,4,16,64or256)

Ethernetinterface

GE,10GELAN,10GEWAN,40GE,100GE,etc

OTNinterface

OTU1,OTU2,OTU3,OTU4,etc

3.1.3ChanneltypesandchannelratesofaWDMsystemshallbeinaccordancewiththosespecifiedin

Table3.1.3.

Table3.1.3ChanneltypesofaWDMsystem

Channeltype

Channelrate(Gbit/s)

Signalstructure

1.25G

0.622-1.25

STM-4orGE

2.5G

2.49-2.67

STM-16orOTU1

10G

9.953-12.5

STM-64orOTU2

40G

39.813-43.018

STM-256orOTU3

100G

100.0-130.0

OTU4

3.2SystemConfiguration

3.2.1AWDMsystem(Figure3.2.1)shallconsistofOpticalTerminalMultiplexer,OpticalLineAmplifierandOpticalAdd-DropMultiplexer,andshallmeetthefollowingrequirements:

1AnOTMshallconsistofamultiplexer,ademultiplexer,anopticalamplifier(OA)andanopticaltransponderunit(OTU).

2AnOLAshallconsistofanOA.

3AnOADMshallconsistofOMU,ODU,OAandOTU.

DTU-

PA

Figure3.2.1WDMsystemconfiguration

Tx/Rx-Clientequipment;BA-Opticalboosteramplifier;PA-Opticalpre-amplifier;LA-Opticallineamplifier

·6·

3.3ApplicationCodes

3.3.1TheapplicationcodesofMulti-spanDWDMsystemshallbedenotedbythecharactersequences"Mn.Bc-xW(-D)-z(S)",andtheapplicationcodesofsingle-spanDWDMsystemshallbedenotedbythecharactersequences"Sn.Bc-W(-D)-z(S)",themeaningandvalueofeachcharactershallbeinaccordancewiththosespecifiedinTable3.3.1.

Table3.3.1ThemeaningandvalueofeachcharacterintheapplicationcodesofDWDMsystem

Character

Meaning

Valueanddefinitions

M

Multi-spanDWDMsystem

一

S

Single-spanDWDMsystem

n

ThemaximumnumberofchannelssupportedbyaDWDMsystem

B

TheDWDMsystem'schanneltype

InaccordancewiththosespecifiedinTable3.1.3

c

Thechannelspacing(GHz)oftheDWDMsystem

一

X

ThemaximumnumberofspanssupportedbytheDWDMsystem

一

W

Loss(dB)inthespanssupportedbytheDWDMsystem

A:Foramulti-spanDWDMsystem,itrepresentsaspanlossof22dB;forasingle-spanDWDMsystem,itrepresentsaspanlossof44dB;

B:Foramulti-spanDWDMsystem,itrepresentsaspanlossof27dB;forasingle-spanDWDMsystem,itrepresentsaspanlossof55dB;

C:Foramulti-spanDWDMsystem,itrepresentsaspanlossof33dB

Z

ThetypeofopticalfiberthattheDWDMsystemsupports

652:thetypeoffiberisG.652

655:thetypeoffiberisG.655

S

TheDWDMsystem'sspectralband

C:ThespectralbandisC-band(1530nm-1565nm),andletter"C"canbeomitted;

L:ThespectralbandisL-band(1565nm-1625nm)

D

With/withoutdispersioncompensationinWDMsystem

1:Withdispersioncompensation

0:Withoutdispersioncompensation

Note:"D"isonlyforthe"100G"DWDMsystem.

3.3.2TheapplicationcodesofaDWDMsystemshallbeinaccordancewiththosespecifiedinTable3.3.2.

Table3.3.2ApplicationcodesofDWDMsystems

Systemcapacity

Applicationcode

Channelspacing

(GHz)

Spanloss

(dB)

Targetdistance

(km)

Fibertype

40×2.5G

M40.2.5G100-8A-652

100

8×22

640

G.652

M40.2.5G100-6A-652

100

6×22

480

G.652

M40.2.5G100-3B-652

100

3×27

300

G.652

M40.2.5G100-3C-652

100

3×33

360

G.652

M40.2.5G100-8A-655

100

8×22

640

G.655

M40.2.5G100-6A-655

100

6×22

480

G.655

M40.2.5G100-3B-655

100

3×27

300

G.655

M40.2.5G100-3C-655

100

3×33

360

G.655

40×10G

M40.10G100-8A-652

100

8×22

640

G.652

M40.10G100-6A-652

100

6×22

480

G.652

M40.10G100-3B-652

100

3×27

300

G.652

M40.10G100-3C-652

100

3×33

360

G.652

·7·

Table3.3.2(continued)

Systemcapacity

Applicationcode

Channelspacing

(GHz)

Spanloss

(dB)

Targetdistance

(km)

Fibertype

40×10G

M40.10G100-8A-655

100

8×22

640

G.655

M40.10G100-6A-655

100

6×22

480

G.655

M40.10G100-3B-655

100

3×27

300

G.655

M40.10G100-3C-655

100

3×33

360

G.655

80×10G

M80.10G50-8A-652

50

8×22

640

G.652

M80.10G50-3B-652

50

3×27

300

G.652

M80.10G50-6B-652

50

6×27

600

G.652

M80.10G50-9B-652

50

9×27

900

G.652

M80.10G50-8A-655

50

8×22

640

G.655

M80.10G50-3B-655

50

3×27

300

G.655

40×10G

ultra-longhaul

M40.10G100-25A-652

100

25×22

2000

G652

M40.10G100-38A-652

100

38×22

3040

G.652

M40.10G100-20B-652

100

20×27

2000

G.652

80×10G

ultra-longhaul

M80.10G50-25A-652

50

25×22

2000

G.652

M80.10G50-38A-652

50

38×22

3040

G.652

M80.10G50-15B-652

50

15×27

2000

G.652

40×10G

ultra-longhaul

S40.10G100-A-652

100

1×44

160

G.652

S40.10G100-B-652

100

1×55

200

G.652

80×40G

M80.40G50-8A-652

50

8×22

640

G.652

M80.40G50-12A-652

50

12×22

960

G652

M80.40G50-16A-652

50

16×22

1280

G.652

M80.40G50-8A-655

50

8×22

640

G.655

M80.40G50-12A-655

50

12×22

960

G.655

M80.40G50-16A-655

50

16×22

1280

G.655

40×40G

M40.40G100-8A-652

100

8×22

640

G.652

M40.40G100-16A-652

100

16×22

1280

G.652

M40.40G100-8A-655

100

8×22

640

G.655

M40.40G100-16A-655

100

16×22

1280

G.655

80×100G

M80.100G50-18A-0-652

50

18×22

1440

G.652

M80.100G50-14A-0-652

50

14×22

1120

G652

M80.100G50-14A-1-652

50

14×22

1120

G.652

M80.100G50-10A-1-652

50

10×22

800

G.652

M80.100G50-16A-0-655

50

16×22

1280

G.655

M80.100G50-16A-0-655

50

10×22

800

G.655

M80.100G50-14A-1-655

50

14×22

1120

G.655

M80.100G50-10A-1-655

50

10×22

800

G.655

3.3.3TheapplicationcodesofCWDMsystemshallbedenotedbythecharactersequences"nWx-ytz",andthemeaningandvalueofeachcharactershallbeinaccordancewiththosespecifiedinTable3.3.3.Forsingle-fiberbidirectionalsystems,character"B"shallbeplacedinfrontoftheapplicationcode.ForsystemswithFEC,character"F"maybeaddedtotheendoftheapplicationcode.

·8·

Table3.3.3ThemeaningandvalueofeachcharacterintheapplicationcodesofCWDMsystem

Character

Meaning

Valueanddefinitions

n

ThemaximumnumberofchannelssupportedbyaCWDMsystem

W

LossinthespanssupportedbyaCWDMsystem

S:Shorthaul;

L:Longhaul

x

ThemaximumnumberofspanssupportedbyaCWDMsystem

y

ThechanneltypesupportedbyacWDMsystem

0:1.25G;1:2.5G;2:10G

t

OAconfigurationofaCWDMsystem

A:Onlyoneopticalboosteramplifierandoneopticalpre-amplifierareused;

B:Onlyoneopticalboosteramplifierisused;

C:Onlyoneopticalpre-amplifierisused;

D:NoOAisused

z

ThetypeofopticalfibersupportedbyaCWDMsystem

2:ThetypeofopticalfiberisG.652;

3:ThetypeofopticalfiberisG.653;

5:ThetypeofoplicalfiberisG.655

3.3.4TheapplicationcodesofaCWDMsystemshallbeinaccordancewiththosespecifiedinTable3.3.4.

Table3.3.4ApplicationcodesofCWDMsystems

Systemcapacity

Applicationcode

Rangeofapplication

Targetdistance(km)

Fibertype

4×1.25G

4S1-0D2

Shorthaul(S)

42

G.652

4L1-0D2

Longhaul(L)

70

G.652

4×2.5G

4S1-1D2

Shorthaul(S)

36

G.652

4L1-1D2

Longhaul(L)

64

G.652

4×10G

4S1-2D2F

Shorthaul(S)

30

G.652

4L1-2D2

Longhaul(L)

46

G.652

4L1-2D2F

Longhaul(L)

55

G.652

8×1.25G

8S1-0D2

Shorthaul(S)

36

G.652

8L1-0D2

Longhaul(L)

64

G.652

8×2.5G

8S1-1D2

Shorthaul(S)

30

G.652

8L1-1D2

Longhaul(L)

58

G.652

8×10G

8S1-2D2F

Shorthaul(S)

24

G.652

8L1-2D2

Longhaul(L)

40

G.652

8L1-2D2F

Longhaul(L)

49

G.652

Note:"Targetdistance"isusedforsystemcategorization;insystemdesign,itshallbecalculatedinaccordancewithArticle4.2.2ofthiscode.

3.3.5TheapplicationcodeofWDMsystemshallbedeterminedaccordingtosuchfactorsasstationconfiguration,fiberparameters,systemcapacity,etc.

3.4CentralWavelengthAllocation

3.4.1ThenominalcentralwavelengthsandcentralfrequenciesofthechannelsofC-band32-channeland40-channelDWDMsystemsshallbeinaccordancewiththosespecifiedinTable3.4.1-1.ThenominalcentralwavelengthsandcentralfrequenciesofthechannelsofC-band80-channelDWDMsystemsshallbeinaccordancewiththosespecifiedinTable3.4.1-2.

·9·

Table3.4.1-1CentralwavelengthallocationplanforC-band40-channelDWDMsystems

C-band

serialNo.

Nominalcentralfrequency(THz)ataspacingof

100GHz

Nominalcentralwavelength(nm)

C-band

serialNo.

Nominalcentralfrequency(THz)ataspacingof

100GHz

Nominalcentralwavelength(nm)

1*

196.20

1527.99

25

193.60

1548.51

2*

196.10

1528.77

26

193.50

1549.32

1

196.00

1529.55

27

193.40

1550.12

2

195.90

1530.33

28

193.30

1550.92

3

195.80

1531.12

29

193.20

1551.72

4

195.70

1531.90

30

193.10

1552.52

5

195.60

1532.68

31

193.00

1553.33

6

195.50

1533.47

32

192.90

1554.13

7

195.40

1534.25

33

192.80

1554.94

8

195.30

1535.04

34

192.70

1555.75

9

195.20

1535.82

35

192.60

1556.55

10

195.10

1536.61

36

192.50

1557.36

11

195.00

1537.40

37

192.40

1558.17

12

194.90

1538.19

38

192.30

1558.98

13

194.80

1538.98

39

192.20

1559.79

14

194.70

1539.77

40

192.10

1560.61

15

194.60

1540.56

3*

192.00

1561.42

16

194.50

1541.35

4*

191.90

1562.23

17

194.40

1542.14

5*

191.80

1563.05

18

194.30

1542.94

6*

191.70

1563.86

19

194.20

1543.73

7*

191.60

1564.68

20

194.10

1544.53

8*

191.50

1565.50

21

194.00

1545.32

9*

191.40

1566.31

22

193.90

1546.12

10*

191.30

1567.13

23

193.80

1546.92

11

191.20

1567.95

24

193.70

1547.72

12*

191.10

1568.77

Notes:1DWDMsstemswith32-channelsinonebandshouduseNo.9-N6.40centralwavelengths;DWDMsystemswith32-channelsintwoseparatebandsshoulduseNo.1-No.16andNo.25-No.40centralwavelengths.

2lrensmarkedwith”+"arescalablewavelengths,whichmeybeusedforDWDMsystemswith41-52chanels.

Table3.4.1-2CentralwavelengthallocationplanforC-band80-channelDWDMsystems

C-band

serialNo.

Nominalcentralfrequency(THz)ataspacingof

50GHz

Nominalcentralwavelength(nm)

C-band

serialNo.

Nominalcentralfrequency(THz)ataspacingoff

50GHz

Nominalcentralwavelength(nm)

1*

196.25

1527.60

9

195.65

1532.29

2*

196.20

1527.99

10

195.60

1532.68

3*

196.15

1528.38

11

195.55

1533.07

4*

196.10

1528.77

12

195.50

1533.47

1

196.05

1529.16

13

195.45

1533.86

2

196.00

1529.55

14

195.40

1534.25

3

195.95

1529.94

15

195.35

1534.64

4

195.90

1530.33

16

195.30

1535.04

5

195.85

1530.72

17

195.25

1535.43

6

195.80

1531.12

18

195.20

1535.82

了

195.75

1531.51

19

195.15

1536.22

8

195.70

1531.90

20

195.10

1536.61

·10·

Table3.4.1-2(continued)

C-band

serialNo.

Nominalcentralfrequency(THz)ataspacingof

50GHz

Nominalcentralwavelength(nm)

C-band

serialNo.

Nominalcentralfrequency(THz)ataspacingof

50GHz

Nominalcentralwavelength(nm)

21

195.05

1537.00

61

193.05

1552.93

22

195.00

1537.40

62

193.00

1553.33

23

194.95

1537.79

63

192.95

1553.73

24

194.90

1538.19

64

192.90

1554.13

25

194.85

1538.58

65

192.85

1554.54

26

194.80

1538.98

66

192.80

1554.94

27

194.75

1539.37

67

192.75

1555.34

28

194.70

1539.77

68

192.70

1555.75

29

194.65

1540.16

69

192.65

1556.15

30

194.60

1540.56

70

192.60

1556.55

31

194.55

1540.95

71

192.55

1556.96

32

194.50

1541.35

72

192.50

1557.36

33

194.45

1541.75

73

192.45

1557.77

34

194.40

1542.14

74

192.40

1558.17

35

194.35

1542.54

75

192.35

1558.58

36

194.30

1542.94

76

192.30

1558.98

37

194.25

1543.33

77

192.25

1559.39

38

194.20

1543.73

78

192.20

1559.79

39

194.15

1544.13

79

192.15

1560.20

40

194.10

1544.53

80

192.10

1560.61

41

194.05

1544.92

5*

192.05

1561.01

42

194.00

1545.32

6*

192.00

1561.42

43

193.95

1545.72

7

191.95

1561.83

44

193.904

1546.12

8

191.90

1562.23

45

193.85

1546.52

9*

191.85

1562.64

46

193.80

1546.92

10

191.80

1563.05

47

193.75

1547.32

11*

191.75

1563.45

48

193.70

1547.72

12*

191.70

1563.86

49

193.65

1548.11

13*

191.65

1564.27

50

193.60

1548.51

14*

191.60

1564.68

51

193.55

1548.91

15*

191.55

1565.09

52

193.50

1549.32

16*

191.50

1565.50

53

193.45

1549.72

17*

191.45

1565.90

54

193.40

1550.12

18*

191.40

1566.31

55

193.35

1550.52

19*

191.35

1566.72

56

193.30

1550.92

20*

191.30

1567.13

57

193.25

1551.32

21*

191.25

1567.54

58

193.20

1551.72

22*

191.20

1567.95

59

193.15

1552.12

23*

191.15

1568.36

60

193.10

1552.52

24*

191.10

1568.77

Note:Itemsmarkedwith"*arescalablewavelengths,whichmaybeusedforDWDMsystemswith81-104channels.

3.4.2ThenominalcentralwavelengthsofthechannelsofCWDMsystemsshallbeinaccordancewiththosespecifiedinTable3.4.2.

·11·

Table3.4.2CWDMsystemchannelwavelengthallocationplan

SerialNo.

Nominalcentralwavelength(nm)

SerialNo.

Nominalcentralwavelength(nm)

1

1271

10

1451

2

1291

11

1471*

3

1311

12

1491*

4

1331

13

1511*

5

1351

14

1531*

6

1371

15

1551*

7

1391

16

1571*

8

1411

17

1591*

9

1431

18

1611*

Notes:1Thewavelengthsmarkedwithan"*"shallbeadoptedby8-channelCWDMsystems.

2Exceptfor8-channelCWDMsystems,wavelengthsmaybeselectedfromthetableabove.

3.5MainPathInterface

3.5.1ThereferencepointofthepathinterfacepfDWDMsystemsshallcomplywiththefollowingrequirement(Figure3.5.1-1andFigure3.5.1-2):

Figure3.5.1-1ReferencepointsofDWDMsystem

MPI-RM

(R)OADM

MPI-SM

R,

OTU

R

clientdevice

λ,,…,2

21,…,λm,λoe

λ,,…,λm,2e

MPI-SM

MPI-RM

Figure3.5.1-2ReferencepointsofDWDMsystem(R)OADM

1Thereferencepointontheopticalfiberattheoutputopticalconnectoroftheclientsignaltransmitteris"S";thereferencepointattheinputtotheclientsignalreceiveropticalconnectoris"R".

2ThereferencepointontheopticalfiberbetweentheoutputopticalconnectoroftheOTUandOMUis"S,";thereferencepointontheopticalfiberbetweentheinputopticalconnectoroftheOTUandODUis"R".

3ThereferencepointontheopticalfibrejustaftertheoutputopticalconnectorofOA(usedforopticalpoweramplification)thatisbehindtheOMis"MPI-SM";thereferencepointontheopticalfibre

·12·

justbeforetheinputopticalconnectorofOA(usedforpre-amplification)thatisinfrontofODUis"MPI-RM".

4ThereferencepointjustaftertheOA(usedforopticallineamplification)outputopticalconnectoris"SM";thereferencepointontheopticalfibrejustbeforetheOA(usedforopticallineamplification)inputopticalconnectoris"RM".

3.5.2DWDMsystems'mainpathinterfaceparameters,attenuationrange,dispersiontoleranceanddifferentialgroupdelay(DGD)shallbeinaccordancewiththefollowingrequirements:

1The32/40×2.5GDWDMsystemshallmeettherequirementsofthecurrentprofessionalstandardYD/T1060TechnicalRequirementsofOpticalWavelengthDivisionMultiplexing(WDM)System—32×2.5Gbit/sPart;

2The32/40×10GDWDMsystemshallmeettherequirementsofthecurrentprofessionalstandardYD/T1143TechnicalRequirementsofOpticalWavelengthDivisionMultiplexing(WDM)System—16×10Gb/sand32×10Gb/sParts;

3The80×10GWDMsystemshallmeettherequirementsofthecurrentprofessionalstandardYD/T1274TechnicalSpecificationforOpticalWavelengthDivisionMultiplexing(WDM)system—160×10Gb/sand80×10Gb/sParts;

4The40/80×40GWDMsystemshallmeettherequirementsofthecurrentprofessionalstandardYD/T1991TechnicalRequirementsforN×40Gbit/sOpticalWavelengthDivisionMulti-plexing(W