1     Scope 
 2     References 
 3     Definitions  
 4     Abbreviations and acronyms        
 5     Conventions     
 6     Standard mappings          
        6.1     10GBASE-W (WAN PHY) via STM-64  
        6.2     GFP-F mapping of 10GBASE-R (LAN PHY) payload only into OPU2     
 7     Non-standard mappings   
        7.1     Bit transparent mapping of 10GBASE-R signal into OPU2e           
        7.2     Bit transparent mapping of 10GBASE-R signal into OPU1e           
        7.3     ITU-T G.709 bit-rate compliant information transparent transport of payload and preamble     
 8     Characteristics of alternative mappings     
        8.1     ITU-T G.709 bit-rate compliant     
        8.2     Inter-domain/intra-domain interfaces          
        8.3     Timing and synchronization 
        8.4     Optical characteristics        
        8.5     Multiplexing, multi-service  
        8.6     Transparency         
        8.7     BER monitoring     
 9     Multiplexing four ODU2e signals into ODU3e      
        9.1     Asynchronous bit-transparent mapping of 4 x ODU2e signal into OPU3e1 
        9.2     Asynchronous generic mapping of four ODU2e signals into OPU3e2