ITUT G70311英文版.docx

ITUT G70311英文版.docx

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ITUTG70311英文版

INTERNATIONALTELECOMMUNICATIONUNION

ITU-T

G.703

TELECOMMUNICATION

STANDARDIZATIONSECTOR

OFITU

（11/2001）

SERIESG:

TRANSMISSIONSYSTEMSANDMEDIA,DIGITALSYSTEMSANDNETWORKS

Digitalterminalequipments –General

Physical/electricalcharacteristicsofhierarchicaldigitalinterfaces

ITUTRecommendationG.703

ITU-TG-SERIESRECOMMENDATIONS

TRANSMISSIONSYSTEMSANDMEDIA,DIGITALSYSTEMSANDNETWORKS

INTERNATIONALTELEPHONECONNECTIONSANDCIRCUITS

G.100–G.199

GENERALCHARACTERISTICSCOMMONTOALLANALOGUECARRIER-TRANSMISSIONSYSTEMS

G.200–G.299

INDIVIDUALCHARACTERISTICSOFINTERNATIONALCARRIERTELEPHONESYSTEMSONMETALLICLINES

G.300–G.399

GENERALCHARACTERISTICSOFINTERNATIONALCARRIERTELEPHONESYSTEMSONRADIO-RELAYORSATELLITELINKSANDINTERCONNECTIONWITHMETALLICLINES

G.400–G.449

COORDINATIONOFRADIOTELEPHONYANDLINETELEPHONY

G.450–G.499

TESTINGEQUIPMENTS

G.500–G.599

TRANSMISSIONMEDIACHARACTERISTICS

G.600–G.699

DIGITALTERMINALEQUIPMENTS

G.700–G.799

General

G.700–G.709

Codingofanaloguesignalsbypulsecodemodulation

G.710–G.719

CodingofanaloguesignalsbymethodsotherthanPCM

G.720–G.729

Principalcharacteristicsofprimarymultiplexequipment

G.730–G.739

Principalcharacteristicsofsecondordermultiplexequipment

G.740–G.749

Principalcharacteristicsofhigherordermultiplexequipment

G.750–G.759

Principalcharacteristicsoftranscoderanddigitalmultiplicationequipment

G.760–G.769

Operations,administrationandmaintenancefeaturesoftransmissionequipment

G.770–G.779

Principalcharacteristicsofmultiplexingequipmentforthesynchronousdigitalhierarchy

G.780–G.789

Otherterminalequipment

G.790–G.799

DIGITALNETWORKS

G.800–G.899

DIGITALSECTIONSANDDIGITALLINESYSTEM

G.900–G.999

QUALITYOFSERVICEANDPERFORMANCE

G.1000–G.1999

TRANSMISSIONMEDIACHARACTERISTICS

G.6000–G.6999

DIGITALTERMINALEQUIPMENTS

G.7000–G.7999

DIGITALNETWORKS

G.8000–G.8999

Forfurtherdetails,pleaserefertothelistofITU-TRecommendations.

ITU-TRecommendationG.703

Physical/electricalcharacteristicsofhierarchicaldigitalinterfaces

Summary

ThisRecommendationspecifiestherecommendedphysicalandelectricalcharacteristicsoftheinterfacesathierarchicalbitratesasdescribedinITU-TRecs.G.702（PDH）andG.707（SDH）.Theinterfacesaredefinedintermsofgeneralcharacteristics,specificationsattheoutputportsandinputportsand/orcrossconnectpoints,earthingofouterconductororscreenandcodingrules.

Source

ITUTRecommendationG.703waspreparedbyITUTStudyGroup 15（20012004）andapprovedundertheWTSAResolution 1procedureon29 November 2001.

History

Issue

Notes

10/2001

Thisrevisioncontainsthefollowingmodifications:

–Additionofclause16on51840kbit/s（STM-0）interface.

–AdditionofAppendixIIIon3152kbit/sinterface（fromG.931/AnnexA）.

–Amendmentstoclause13on2048kbit/ssynchronizationinterface.

–Amendmentsofclauses4,9,10,11withtheinclusionofoutputreturnlossrequirementsforthe64kbit/s（codirectional）,2048,8448,34368kbit/sinterfaces.

–Insertionofnamesofhierarchicalinterfaces（E0,E11,E21etc.）intotheheadingsofthecorrespondingclauses.

–GivingofreferencestoITU-TRec.G.824（2000）withjitterparametersforthe1544kbit/shierarchy.

SomeeditorialcorrectionsweremadeincludingchangesofreferencestothelastversionsofG.823,G.825（2000）.

10/98

Thisrevisionincludesacorrectiontothespecificationofthe1544and44736kbit/sinterfacesandtheadditionofAppendixI.AppendixIcontainsapreviousversionofthe1544kbit/sinterfacespecification.

TheovervoltageprotectionrequirementshavebeendeletedandreplacedwithareferencetoRecommendationK.41"Resistibilityofinternalinterfacesoftelecommunicationcentrestosurgeovervoltages".

Thegroundingrequirementsforthescreen（ifexisting）ofasymmetricalpair,ortheouterconductorofacoaxialcablehavebeenenhanced.

EditorialmodificationsareincludedtocomplywithRecommendationA.3.Clauses1to12inthe1991revisionareasaconsequencerenumberedintoclauses4to15.

AppendixIIon64and6312synchronizationinterfacesforuseinJapanhasbeenadded.

1991

Previousrevision

1972

Initialversion

FOREWORD

TheInternationalTelecommunicationUnion（ITU）istheUnitedNationsspecializedagencyinthefieldoftelecommunications.TheITUTelecommunicationStandardizationSector（ITU-T）isapermanentorganofITU.ITU-Tisresponsibleforstudyingtechnical,operatingandtariffquestionsandissuingRecommendationsonthemwithaviewtostandardizingtelecommunicationsonaworldwidebasis.

TheWorldTelecommunicationStandardizationAssembly（WTSA）,whichmeetseveryfouryears,establishesthetopicsforstudybytheITUTstudygroupswhich,inturn,produceRecommendationsonthesetopics.

TheapprovalofITU-TRecommendationsiscoveredbytheprocedurelaiddowninWTSAResolution 1.

InsomeareasofinformationtechnologywhichfallwithinITU-T'spurview,thenecessarystandardsarepreparedonacollaborativebasiswithISOandIEC.

NOTE

InthisRecommendation,theexpression"Administration"isusedforconcisenesstoindicatebothatelecommunicationadministrationandarecognizedoperatingagency.

INTELLECTUALPROPERTYRIGHTS

ITUdrawsattentiontothepossibilitythatthepracticeorimplementationofthisRecommendationmayinvolvetheuseofaclaimedIntellectualPropertyRight.ITUtakesnopositionconcerningtheevidence,validityorapplicabilityofclaimedIntellectualPropertyRights,whetherassertedbyITUmembersorothersoutsideoftheRecommendationdevelopmentprocess.

AsofthedateofapprovalofthisRecommendation,ITUhadnotreceivednoticeofintellectualproperty,protectedbypatents,whichmayberequiredtoimplementthisRecommendation.However,implementorsarecautionedthatthismaynotrepresentthelatestinformationandarethereforestronglyurgedtoconsulttheTSBpatentdatabase.

  ITU  2002

Allrightsreserved.Nopartofthispublicationmaybereproduced,byanymeanswhatsoever,withoutthepriorwrittenpermissionofITU.

CONTENTS

Page

1Scope1

2References1

3Abbreviations2

4Interfaceat64kbit/s（E0）3

4.1Functionalrequirements3

4.1.1Threetypesofenvisagedinterfaces3

4.2Electricalcharacteristics5

4.2.1Electricalcharacteristicsof64kbit/scodirectionalinterface5

4.2.2Electricalcharacteristicsofthe64kbit/scentralizedclockinterface8

4.2.3Electricalcharacteristicsof64kbit/scontradirectionalinterface10

5Interfaceat1544kbit/s（E11）13

5.1Generalcharacteristics13

5.2Pulsespecification16

5.3Eyediagrams16

6Interfaceat6312kbit/s（E21）16

7Interfaceat32064kbit/s19

8Interfaceat44736kbit/s（E32）21

9Interfaceat2048kbit/s（E12）23

9.1Generalcharacteristics23

9.2Specificationsattheoutputports24

9.3Specificationsattheinputports25

9.4Groundingofouterconductororscreen26

10Interfaceat8448kbit/s（E22）26

10.1Generalcharacteristics26

10.2Specificationattheoutputports26

10.3Specificationsattheinputports28

10.4Groundingofouterconductor28

11Interfaceat34368kbit/s（E31）28

11.1Generalcharacteristics28

11.2Specificationattheoutputports28

11.3Specificationsattheinputports30

11.4Groundingofouterconductor30

12Interfaceat139264kbit/s（E4）30

Page

12.1Generalcharacteristics30

12.2Specificationsattheoutputports31

12.3Specificationsattheinputports34

12.4Groundingofouterconductor34

132048kHzsynchronizationinterface（T12）34

13.1Generalcharacteristics34

13.2Specificationsattheoutputports34

13.3Specificationsattheinputports35

13.4Groundingofouterconductororscreen36

14Interfaceat97728kbit/s36

15Interfaceat155520kbit/sSTM-1interface（ES1）37

15.1Generalcharacteristics37

15.2Specificationsattheoutputports37

15.3Specificationsattheinputports38

15.4Specificationsatthecross-connectpoints38

15.5Groundingofouterconductor41

16Interfaceat51840kbit/s（STM-0interface）41

16.1Generalcharacteristics41

16.2Specificationsattheoutputports42

16.3Specificationsattheinputports46

16.4Specificationsatthecross-connectpoints47

16.5Groundingofouterconductor48

AnnexA–Definitionofcodes48

A.1DefinitionofB3ZS（alsodesignatedHDB2）andHDB348

A.2DefinitionofB6ZSandB8ZS48

A.3DefinitionofCMI48

AppendixI–1544kbit/sspecificationinthe1991versionofthisRecommendation49

I.1General49

I.2Interfacespecification49

I.3Pulsemask49

AppendixII–64and6312kHzsynchronizationinterfacespecificationforuseinJapan51

II.164kHzsynchronizationinterface51

II.26312kHzsynchronizationinterface52

AppendixIII–3152kbit/sinterfacespecificationforuseinNorthAmerica53

ITU-TRecommendationG.703

Physical/electricalcharacteristicsofhierarchicaldigitalinterfaces

1Scope

ThisRecommendationprovidestherecommendedphysicalandelectricalcharacteristicsoftheinterfacesathierarchicalbitratesasdescribedinITU-TRecs.G.702（PDH）andG.707（SDH）,toenabletheinterconnectionofdigitalnetworkcomponents（digitalsections,multiplexequipment,exchanges）toformaninternationaldigitallinkorconnection.ThecharacteristicsgiveninthisRecommendationshouldbeappliedtonewequipment（component）designs.

NOTE 1 – Thecharacteristicsofinterfacesatnon-hierarchicalbitrates,exceptn64kbit/sinterfacesconveyedby1544 kbit/sor2048 kbit/sinterfacesand3152kbit/sinterfacei