Table of Contents

 1 Scope            
 2 References   
 3 Definitions   
        3.1 Terms defined elsewhere
        3.2 Terms defined in this Recommendation     
 4 Abbreviations and acronyms  
 5 Dense wavelength division multiplexing and its applications            
 6 Fixed grid nominal central frequencies for dense WDM systems     
 7 Flexible DWDM grid definition
Appendix I – Use of the flexible grid    
        I.1 Flexible grid examples     
        I.2 Flexible grid compliance