CONTENTS

�1���� Scope
�2���� References
������� 2.1���� Normative references
������� 2.2���� Informative references
�3���� Terms and definitions
������� 3.1���� Definitions
����������������� 3.1.1���� Optical tributary signal
����������������� 3.1.2���� Optical tributary signal class NRZ 2.5G
����������������� 3.1.3���� Optical tributary signal class NRZ 10G
����������������� 3.1.4���� Optical Transmission Section of order 1 (OTS1)
����������������� 3.1.5���� Optical Transmission Section of order n (OTSn)
����������������� 3.1.6���� Pre-OTN
������� 3.2���� Terms defined in other Recommendations
�4���� Abbreviations
�5���� Classification of optical interfaces
������� 5.1���� Applications
������� 5.2���� Reference points
������� 5.3���� Nomenclature
������� 5.4���� Multichannel inter-domain interfaces
����������������� 5.4.1���� Amplified short-haul multichannel inter-domain interfaces
����������������� 5.4.2���� Non-amplified intra-office multichannel inter-domain interfaces
����������������� 5.4.3���� Non-amplified short-haul multichannel inter-domain interfaces
������� 5.5���� Single channel inter-domain interfaces
������� 5.6���� Management signal implementations
�6���� Transverse compatibility
�7���� Parameter definitions
������� 7.1���� System operating wavelength range
������� 7.2���� Parameters
����������������� 7.2.1���� General information
����������������� 7.2.2���� Interface at point MPI-S_M
����������������� 7.2.3���� Optical path (single span) from point MPI-S_M to MPI-R_M
����������������� 7.2.4��� �Interface at point MPI-R_M
����������������� 7.2.5���� Interface at point S_M-S
����������������� 7.2.6���� Optical path from point S_M-Sto R_S-M
����������������� 7.2.7���� Interface at point R_S-M
�8���� Parameter values
������� 8.1���� Multichannel IrDI
� ������8.2���� Single channel IrDI
�9���� Optical safety considerations
10���� Power level management
Annex A � Configuration for method a for assessment of single channel characteristics� in a multichannel IrDI
������� A.1���� Reference configuration
Annex B � Reference optical bandpass filter and reference receiver characteristics for Method B,� for assessment of single channel characteristics in a multichannel IRDI
������� B.1���� Reference configuration
������� B.2���� Reference optical bandpass filter
����������������� B.2.1���� Optical filter parameters
������� B.3���� Reference receiver
Appendix I � Single channel client interfaces with 3R regeneration
������� I.1���� Introduction
������� I.2���� Description of client signal interfaces with 3R regeneration
Appendix II � Clarification of use of reference points within IrDI and IaDI
Appendix III � Considerations for management signal implementations
����� III.1���� Optical Channel management signal implementation
����� III.2���� Optical Multiplex Section and Optical Transmission Section management signal implementation
Appendix IV � Future IaDI considerations
������ IV.1���� Additional interfaces to consider
������ IV.2���� ONE transfer parameters
Appendix V � Application of the optical signal to noise floor ratio, OSNFR
������� V.1���� Definition of the optical signal to noise floor ratio
������� V.2���� Validity of the parameter
������� V.3���� Non-compliance with the IrDI specifications
������� V.4���� Alternative control methods