Table of Contents - G.984.3 (2014) Amd. 2 (11/2025) -

1	Scope
2	References
3	Definitions
	3.1	Terms defined elsewhere
	3.2	Terms defined in this Recommendation
4	Abbreviations and acronyms
5	Conventions and terminology
	5.1	ONT and ONU
	5.2	Data encapsulation method and deprecation of ATM transport
	5.3	Traffic monitoring versus non-status-reporting
	5.4	Bandwidth assignment versus bandwidth allocation
	5.5	G-PON time division multiplexing architecture
	5.6	Disambiguation of the concept of frame
	5.7	Concepts associated with upstream physical layer overhead
6	G-PON system architecture
	6.1	Network architecture and reference configuration
	6.2	Parameters of the GTC layer
	6.3	Functional blocks
	6.4	Interoperability between G-PON and B-PON
7	G-PON transmission convergence layer overview
	7.1	GTC protocol stack
	7.2	GTC key functions
	7.3	Functions of Sublayers in GTC
	7.4	Dynamic bandwidth assignment
	7.5	Resource allocation and quality of service (QoS)
8	GTC layer framing
	8.1	Downstream GTC frame structure
	8.2	Upstream burst structure
	8.3	Mapping of GEM frames into GTC payload
	8.4	Status reporting DBA signalling and configuration
9	GTC messages
	9.1	PLOAM message format
	9.2	Control messages
10	Activation method
	10.1	Overview
	10.2	Activation mechanism at the ONU
	10.3	OLT support of the activation process
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	10.4	OLT and ONU timing relationships
	10.5	Power levelling
11	Alarms and performance monitoring
	11.1	Alarms
	11.2	Performance monitoring
12	Security
	12.1	Basic threat model
	12.2	Encryption system
	12.3	Data encryption key exchange
	12.4	Data encryption key switch-over
13	Forward error correction
	13.1	Introduction
	13.2	Downstream FEC
	13.3	Upstream FEC
	13.4	ONU activation transmissions
14	OMCI transport mechanism
	14.1	OMCI transport schema
	14.2	OMCI adapters
Annex A – Implementers' guide for Recommendation ITU-T G.984.3
	A.1	Introduction
	A.2	AES mechanism and golden vectors
	A.3	FEC encoding golden vector
	A.4	Scrambler diagram
	A.5	A downstream frame example
	A.6	ONU activation process
	A.7	PLOAM messages
	A.8	Transmitter block diagram
Annex B – Enhanced Security Capabilities
	B.1	Introduction
	B.2	Secure mutual authentication and data key encryption
	B.3	G-PON systems with reduced data encryption strength
Annex C – PON-ID maintenance
	C.1	Introduction
	C.2	PON-ID PLOAM message
Annex D – PLOAM channel enhancements
	D.1	Introduction
	D.2	New downstream PLOAM message types
	D.3	New downstream PLOAM message descriptions
	D.4	Modified activation state diagram
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Annex E – ONU Power Management
	E.1	Introduction
	E.2	PLOAM channel modification
	E.3	Bandwidth map flag modification
	E.4	Alarm modification
	E.5	ONU power management protocol
Appendix I – Transport of user traffic over GEM channels
I.1
I.2
I.3
I.4
I.5
I.6
Appendix II – Survivability in GTC-based systems
Appendix III – GEM header error control decoding
Appendix IV – OLT activation procedures overview
	IV.1	Common part
	IV.2	ONU-specific part
	IV.3	Automatic ONU Discovery Method
	IV.4	POPUP process
Appendix V – Downstream line data pattern conditioning
	V.1	Idle pattern control
	V.2	Intentional PON disruption
Appendix VI  ONU registration methods
	VI.1	Authentication by serial number
	VI.2	Authentication by PLOAM password
	VI.3	Other forms of authentication
Appendix VII – Time of day derivation and error analysis
Bibliography