Series G  Transmission systems and media, digital systems and networks

Document Outline

• ITU-T Rec. G.957 (06/99) OPTICAL INTERFACES FOR EQUIPMENTS AND SYSTEMS RELATING TO THE SYNCHRONOUS DIGITAL HIERARCHY
• Summary
• Source
• CONTENTS
• OPTICAL INTERFACES FOR EQUIPMENTS AND SYSTEMS RELATING TO THE SYNCHRONOUS DIGITAL HIERARCHY
• 1 Scope
• 2 References
• 3 Terms and definitions
  • 3.1 Definitions
  • 3.2 Terms defined in other Recommendations
• 4 Abbreviations
• 5 Classification of optical interfaces
• 6 Parameter definitions
  • 6.1 System operating wavelength range
  • 6.2 Transmitter
  • 6.3 Optical path
  • 6.4 Receiver
• 7 Optical parameter values for SDH applications
• 8 Optical engineering approach
  • 8.1 Design assumptions
  • 8.2 Worst-case design approach
  • 8.3 Statistical design approach
  • 8.4 Upgradability considerations
  • 8.5 Joint engineering
• ANNEX A - System operating wavelength considerations
• A.1 Operating wavelength ranges determined by fibre attenuation
• A.2 Operating wavelength ranges determined by fibre dispersion
• ANNEX B - Measurement of the mask of the eye diagram of the optical transmit signal
• B.1 Measurement set-up
• B.2 Transfer function of the optical reference receiver
• APPENDIX I - Methods for measuring reflections
• I.1 Optical continuous-wave reflectometer
• I.2 Optical time-domain reflectometer
• APPENDIX II - Implementation of the Consecutive Identical Digit (CID) immunity measurement
• II.1 Introduction
• II.2 Method
• APPENDIX III - Possible method for evaluating aging margin contribution in receiver sensitivity specifications
• III.1 Receiver sensitivity and eye opening
• III.2 S/X test method
• APPENDIX IV - Upgradability examples
• IV.1 Example 1
• IV.2 Example 2