1 Scope
2 References
3 Definitions
3.1 Terms defined elsewhere
3.2 Terms defined in this Recommendation
4 Abbreviations and acronyms
5 Architecture of the optical access network
5.1 Network architecture
5.2 Reference configuration
6 Migration scenarios
6.1 Migration from legacy PON to XG-PON
6.2 Migration from XG-PON1 to XG-PON2
6.3 Overlay of XG-PON or hybrid XG-PON
6.4 RE architecture options
7 Service requirements
7.1 Services
7.2 Maximum/mean signal transfer delay tolerance
7.3 Maximum Ethernet packet size
7.4 Synchronization features and quality
7.5 Leased line T1/E1 emulation
7.6 QoS and traffic management
8 Physical layer requirements
8.1 Fibre characteristics
8.2 Optical wavelengths of XG-PON
8.3 Bit rates
8.4 Optical power budget
8.5 Split ratio
8.6 Fibre distance
9 System level requirements
9.1 Power saving and energy efficiency
9.2 Authentication/identification/encryption
9.3 Dynamic bandwidth assignment (DBA)
9.4 Eye safety
10 Operational requirements
10.1 ONU management
10.2 PON supervision
11 Resilience and protection on ODN
Appendix I – Examples of practical XG-PON system architecture
I.1 Services, UNIs and SNIs
I.2 Typical system architectures
I.3 Service protocol stacks
Appendix II – Synchronizing requirements for wireless in CBU scenario
Appendix III – External access network back-up
III.1 External access network back-up
Bibliography