Table of Contents

 1     Scope          
 2     References
 3     Definitions
 4     Abbreviations and acronyms             
 5     Conventions            
 6     Architecture of the optical access network 
        6.1     Physical grouping of logical functions
        6.2     ODN optical path loss (OPL) classes    
        6.3     Fibre distance classes
 7     Services     
 8     User network interface and service node interface  
 9     Common optical network requirements      
        9.1     Layered structure of optical network 
        9.2     Wavelength plans for NG-PON2           
        9.3     Physical media dependent layer requirements              
10     Crosstalk-to-signal ratio tolerance for NG-PON2     
       10.1     Wideband X/S tolerance mask definition        
       10.2     Narrowband TWDM PON X/S tolerance mask
11     TWDM PON PMD layer requirements          
       11.1     PMD layer requirements       
       11.2     Upstream physical layer overhead    
Annex A – Tunable PtP WDM PON PMD layer requirements    
        A.1     PMD layer requirements        
Annex B – Auxiliary management and control channel    
        B.1 Introduction 
        B.2 Transparent AMCC    
Annex C – Low loss (LL) PtP WDM PON PMD layer requirements    
        C.1     PMD layer requirements        
Annex D – ONU power levelling     
        D.1     Interaction between NG-PON2 PMD layer and TC layer             
        D.2     Power levelling (PL) mechanism at ONU transmitter   
        D.3     ONU autonomous power levelling      
        D.4     OOC and OOB PSD relaxation
        D.5     OLT directed ONU power levelling      
        D.6     ONU troubleshooting considerations
Appendix I – Wavelength considerations for NG-PON2, XG-PON1, G-PON and RF video overlay distribution services    
Appendix II – Physical layer measurements required to support optical layer supervision    
Appendix III – Allocation of the physical layer overhead time    
Appendix IV – Jitter budget specifications for TWDM PON    
Appendix V – Measurement of TWDM PON burst mode acquisition time and burst node eye opening at OLT     
Appendix VI – Nonlinear Raman interactions in optical fibres and mitigation technologies for coexistence of multiple PONs    
Appendix VII – Cyclic AWG channel grid design examples    
Appendix VIII – Wavelength multiplexer, upstream inter-channel crosstalk, ONU transmitter tuning time considerations, and upstream channel grid example    
     VIII.1     Wavelength multiplexer         
     VIII.2     Upstream inter-channel crosstalk       
     VIII.3     ONU transmitter tuning time
     VIII.4     TWDM PON upstream channel grid examples
Appendix IX – Alternative line code for Raman mitigation    
       IX.1     8B10B Scheme            
       IX.2     Miller & Miller squared scheme           
       IX.3 Raman mitigation suppression levels 
Appendix X – Upstream PMD examples for TWDM PON    
Bibliography