Table of Contents
FOREWORD
CONTENTS
1Scope
2References
3Abbreviations
4Interfaceat64kbit/s(E0)
4.1Functionalrequirements
4.1.1Threetypesofenvisagedinterfaces
4.2Electricalcharacteristics
4.2.1Electricalcharacteristicsof64kbit/s
codirectionalinterface
4.2.2Electricalcharacteristicsofthe64kbit/s
centralizedclockinterface
4.2.3Electricalcharacteristicsof64kbit/s
contradirectionalinterface
5Interfaceat1544kbit/s(E11)
5.1Generalcharacteristics
5.2Pulsespecification
5.3Eyediagrams
6Interfaceat6312kbit/s(E21)
7Interfaceat32064kbit/s
8Interfaceat44736kbit/s(E32)
9Interfaceat2048kbit/s(E12)
9.1Generalcharacteristics
9.2Specificationsattheoutputports
9.3Specificationsattheinputports
9.4Groundingofouterconductororscreen
10Interfaceat8448kbit/s(E22)
10.1Generalcharacteristics
10.2Specificationattheoutputports
10.3Specificationsattheinputports
10.4Groundingofouterconductor
11Interfaceat34368kbit/s(E31)
11.1Generalcharacteristics
11.2Specificationattheoutputports
11.3Specificationsattheinputports
11.4Groundingofouterconductor
12Interfaceat139264kbit/s(E4)
12.1Generalcharacteristics
12.2Specificationsattheoutputports
12.3Specificationsattheinputports
12.4Groundingofouterconductor
132048kHzsynchronizationinterface(T12)
13.1Generalcharacteristics
13.2Specificationsattheoutputports
13.3Specificationsattheinputports
13.4Groundingofouterconductororscreen
14Interfaceat97728kbit/s
15Interfaceat155520kbit/sSTM-1interface(ES1)
15.1Generalcharacteristics
15.2Specificationsattheoutputports
15.3Specificationsattheinputports
15.4Specificationsatthecross-connectpoints
15.5Groundingofouterconductor
16Interfaceat51840kbit/s(STM-0interface)
16.1Generalcharacteristics
16.2Specificationsattheoutputports
16.3Specificationsattheinputports
16.4Specificationsatthecross-connectpoints
16.5Groundingofouterconductor
AnnexA-Definitionofcodes
A.1DefinitionofB3ZS(alsodesignatedHDB2)andHDB3
A.2DefinitionofB6ZSandB8ZS
A.3DefinitionofCMI
AppendixI-1544kbit/sspecificationinthe1991version
ofthisRecommendation
I.1General
I.2Interfacespecification
I.3Pulsemask
AppendixII-64and6312kHzsynchronizationinterface
specificationforuseinJapan
II.164kHzsynchronizationinterface
II.26312kHzsynchronizationinterface
AppendixIII-3152kbit/sinterfacespecificationforuse
inNorthAmerica(fromAnnexA/G.931) Abstract
Specifies the recommended physical and electrical characteristics of the interfaces at hierarchical bit rates as described in ITU-T Recommendations G.702 (PDH) and G.707 (SDH). The interfaces are defined in terms of general characteristics, specifications at the output ports and input ports and/or cross-connect points, earthing of outer conductor or screen and coding rules.
