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
6.2.1 Nominal source type
6.2.2 Spectral characteristics
6.2.3 Mean launched power
6.2.4 Extinction ratio
6.2.5 Eye pattern mask
6.3 Optical path
6.3.1 Attenuation
6.3.2 Dispersion
6.3.3 Reflections
6.4 Receiver
6.4.1 Receiver sensitivity
6.4.2 Receiver overload
6.4.3 Receiver reflectance
6.4.4 Optical path power penalty
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