1 Scope
2 References
2.1 Normative references
3 Terms and definitions
3.1 Terms defined in this Recommendation
3.2 Terms defined elsewhere
4 Abbreviations and acronyms
5 Optical monitoring overview
6 Classification of monitoring methods
6.1 Signal monitoring
6.2 Equipment monitoring (indirect methods)
6.3 Embedded monitoring equipment
6.4 External monitoring equipment
7 Optical impairments
8 Optical monitoring parameters
9 Correlation between impairment effects and optical monitoring parameters
degradation
9.1 Variation of attenuation
9.2 Frequency (or wavelength) deviation from nominal
9.3 Optical channel power changes due to gain variations
10 Applications
11 Optical safety considerations
Appendix I – Severity of optical impairments
Appendix II – Penalty severity value X
Appendix III – Optical monitoring performance
III.1 OSNR measurement
III.2 Q-factor measurement
Appendix IV – Possible positions for suitable monitoring equipment and
their relative functions in several optical network elements
IV.1 Introduction
IV.2 Embedded monitoring points
IV.3 External monitoring points
Appendix V – Parameter encoding
V.1 Wavelength ID (32 bits)
V.2 Parameter ID source (8 bits)
V.3 Parameter ID (8 bits)
V.4 Value of parameters (32 bits)
Bibliography