IEEE 802.3ca-2020

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IEEE Standard for Ethernet Amendment 9: Physical Layer Specifications and Management Parameters for 25 Gb/s and 50 Gb/s Passive Optical Networks (Superseded)

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IEEE	2020

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Description

Amendment Standard – Superseded. This amendment to IEEE Std 802.3-2018 extends the operation of Ethernet passive optical networks (EPONs) to multiple channels of 25 Gb/s providing both symmetric and asymmetric operation for the following data rates downstream/upstream): 25/10 Gb/s, 25/25 Gb/s, 50/10 Gb/s, 50/25 Gb/s, and 50/50 Gb/s. This standard specifies the 25 Gb/s EPON Multi-Channel Reconciliation Sublayer (MCRS), Nx25G-EPON Physical Coding Sublayers (PCSs), Physical Media Attachment (PMA) sublayers, and Physical Medium Dependent (PMD) sublayers that support both symmetric and asymmetric data rates while maintaining backward compatibility with already deployed 10 Gb/s EPON equipment. Backward compatibility with deployed 1G-EPON and ITU-T G.984 GPON is maintained with 25GBASE-PQ for the specific case of 1G-EPON and GPON ONUs using reduced-band (40 nm) lasers. The EPON operation is defined for distances of at least 20 km, and for a split ratio of at least 1:32.

PDF Catalog

PDF Pages	PDF Title
1	IEEE Std 802.3ca-2020 Front Cover
2	Title page
4	Important Notices and Disclaimers Concerning IEEE Standards Documents
7	Participants
10	Introduction
13	Contents
24	1. Introduction 1.3 Normative references 1.4 Definitions
26	1.5 Abbreviations
27	30. Management 30.3 Layer management for DTEs 30.3.2 PHY device managed object class 30.3.2.1 PHY device attributes 30.3.2.1.2 aPhyType 30.3.2.1.3 aPhyTypeList
28	30.3.5 MPCP managed object class 30.3.5.1 MPCP Attributes 30.3.5.1.2 aMPCPAdminState 30.3.5.1.3 aMPCPMode 30.3.5.1.4 aMPCPLinkID 30.5 Layer management for medium attachment units (MAUs) 30.5.1 MAU managed object class 30.5.1.1 MAU attributes 30.5.1.1.2 aMAUType
32	45. Management Data Input/Output (MDIO) Interface 45.2 MDIO Interface Registers 45.2.1 PMA/PMD registers 45.2.1.23a PMA/PMD control 3 register (Register 1.29) 45.2.1.23a.1 Downstream differential encoding (1.29.15) 45.2.1.23a.2 PMA/PMD type selection (1.29.5:0)
34	45.2.1.134a Nx25G-EPON PMA/PMD extended ability register (Registers 1.1000 through 1.1002)
36	45.2.1.134a.1 25GBASE-PQX-U3 (1.1000.15) 45.2.1.134a.2 25GBASE-PQX-U2 (1.1000.14) 45.2.1.134a.3 25GBASE-PQX-D3 (1.1000.13) 45.2.1.134a.4 25GBASE-PQX-D2 (1.1000.12) 45.2.1.134a.5 25GBASE-PQG-U3 (1.1000.11) 45.2.1.134a.6 25GBASE-PQG-U2 (1.1000.10)
37	45.2.1.134a.7 25GBASE-PQG-D3 (1.1000.9) 45.2.1.134a.8 25GBASE-PQG-D2 (1.1000.8) 45.2.1.134a.9 25/10GBASE-PQX-U3 (1.1000.7) 45.2.1.134a.10 25/10GBASE-PQX-U2 (1.1000.6) 45.2.1.134a.11 25/10GBASE-PQX-D3 (1.1000.5) 45.2.1.134a.12 25/10GBASE-PQX-D2 (1.1000.4) 45.2.1.134a.13 25/10GBASE-PQG-U3 (1.1000.3) 45.2.1.134a.14 25/10GBASE-PQG-U2 (1.1000.2) 45.2.1.134a.15 25/10GBASE-PQG-D3 (1.1000.1)
38	45.2.1.134a.16 25/10GBASE-PQG-D2 (1.1000.0) 45.2.1.134a.17 50/25GBASE-PQX-U3 (1.1001.15) 45.2.1.134a.18 50/25GBASE-PQX-U2 (1.1001.14) 45.2.1.134a.19 50/25GBASE-PQX-D3 (1.1001.13) 45.2.1.134a.20 50/25GBASE-PQX-D2 (1.1001.12) 45.2.1.134a.21 50/25GBASE-PQG-U3 (1.1001.11) 45.2.1.134a.22 50/25GBASE-PQG-U2 (1.1001.10) 45.2.1.134a.23 50/25GBASE-PQG-D3 (1.1001.9) 45.2.1.134a.24 50/25GBASE-PQG-D2 (1.1001.8)
39	45.2.1.134a.25 50/10GBASE-PQX-U3 (1.1001.7) 45.2.1.134a.26 50/10GBASE-PQX-U2 (1.1001.6) 45.2.1.134a.27 50/10GBASE-PQX-D3 (1.1001.5) 45.2.1.134a.28 50/10GBASE-PQX-D2 (1.1001.4) 45.2.1.134a.29 50/10GBASE-PQG-U3 (1.1001.3) 45.2.1.134a.30 50/10GBASE-PQG-U2 (1.1001.2) 45.2.1.134a.31 50/10GBASE-PQG-D3 (1.1001.1) 45.2.1.134a.32 50/10GBASE-PQG-D2 (1.1001.0) 45.2.1.134a.33 50GBASE-PQX-U3 (1.1002.7)
40	45.2.1.134a.34 50GBASE-PQX-U2 (1.1002.6) 45.2.1.134a.35 50GBASE-PQX-D3 (1.1002.5) 45.2.1.134a.36 50GBASE-PQX-D2 (1.1002.4) 45.2.1.134a.37 50GBASE-PQG-U3 (1.1002.3) 45.2.1.134a.38 50GBASE-PQG-U2 (1.1002.2) 45.2.1.134a.39 50GBASE-PQG-D3 (1.1002.1) 45.2.1.134a.40 50GBASE-PQG-D2 (1.1002.0)
41	45.2.3 PCS registers 45.2.3.1 PCS control 1 register (Register 3.0)
42	45.2.3.6 PCS control 2 register (Register 3.7) 45.2.3.6.1 PCS type selection (3.7.34:0) 45.2.3.8 PCS status 3 register (Register 3.9)
43	45.2.3.8.aa 25GBASE-PQ capable (3.9.7) 45.2.3.8.ab 25/10GBASE-PQ capable (3.9.6) 45.2.3.8.ac 25GBASE-PQ Rx only capable (3.9.5) 45.2.3.8.ad 25GBASE-PQ Tx only capable (3.9.4) 45.2.3.41 10/1GBASE-PRX and 10GBASE-PR10G-EPON and Nx25G-EPON corrected FEC codewords counter (Register 3.76, 3.77)
44	45.2.3.42 10/1GBASE-PRX and 10GBASE-PR10G-EPON and Nx25G-EPON uncorrected FEC codewords counter (Register 3.78, 3.79) 45.2.3.43 10GBASE-PR and, 10/1GBASE-PRX, and Nx25G-EPON BER monitor interval timer control register (Register 3.80)
45	45.2.3.44 10GBASE-PR and, 10/1GBASE-PRX, and Nx25G-EPON BER monitor status (Register 3.81) 45.2.3.44.1 10GBASE-PR and, 10/1GBASE-PRX, and Nx25G-EPON PCS high BER (3.81.0)
46	45.2.3.44.2 10GBASE-PR and, 10/1GBASE-PRX, and Nx25G-EPON PCS latched high BER (3.81.1) 45.2.3.45 10GBASE-PR and, 10/1GBASE-PRX, and Nx25G-EPON BER monitor threshold control (Register 3.82) 45.2.3.45a Nx25G-EPON synchronization pattern registers (Registers 3.83 through 3.134)
47	45.2.3.45a.1 SP3 bit 257 (3.83.5) 45.2.3.45a.2 SP3 balanced (3.83.4) 45.2.3.45a.3 SP2 bit 257 (3.83.3) 45.2.3.45a.4 SP2 balanced (3.83.2)
48	45.2.3.45a.5 SP1 bit 257 (3.83.1) 45.2.3.45a.6 SP1 balanced (3.83.0) 45.2.3.45a.7 SP1 pattern (3.84.0 through 3.99.15) 45.2.3.45a.8 SP1 length (3.100.15:0) 45.2.3.45a.9 SP2 pattern (3.101.0 through 3.116.15) 45.2.3.45a.10 SP2 length (3.117.15:0) 45.2.3.45a.11 SP3 pattern (3.118.0 through 3.133.15) 45.2.3.45a.12 SP3 length (3.134.15:0)
49	45.5 Protocol implementation conformance statement (PICS) proforma for Clause 45, Management Data Input/Output (MDIO) interface 45.5.1 Introduction 45.5.2 Identification 45.5.2.1 Implementation identification 45.5.2.2 Protocol summary
50	45.5.3 PICS proforma tables for the Management Data Input Output (MDIO) interface 45.5.3.3 PMA/PMD management functions 45.5.3.7 PCS management functions
51	56. Introduction to Ethernet for subscriber access networks 56.1 Overview 56.1.2 Summary of P2MP sublayers
53	56.1.2.1 Multipoint MAC Control Protocol (MPCP) 56.1.2.2 Reconciliation Sublayer (RS) and media independent interfaces 56.1.3 Physical Layer signaling systems
60	67. System considerations for Ethernet subscriber access networks 67.1 Overview
62	141. Physical Medium Dependent (PMD) sublayer and medium for Nx25G-EPON passive optical networks 141.1 Overview 141.1.1 Terminology 141.1.2 Positioning of the PMD sublayer within the IEEE 802.3 architecture 141.1.3 PHY link types
65	141.2 PMD nomenclature 141.2.1 Introduction 141.2.2 PMD rate classes 141.2.3 PMD coexistence classes 141.2.4 PMD transmission direction classes 141.2.5 PMD power classes
66	141.2.6 PMD naming 141.2.7 Supported combinations of OLT and ONU PMDs
67	141.2.7.1 PHY Links supporting medium power budget
68	141.2.7.2 PHY Links supporting high power budget 141.3 PMD functional specifications 141.3.1 PMD service interface 141.3.1.1 Channel-to-wavelength mapping
69	141.3.1.2 Delay constraints 141.3.1.3 PMD_UNITDATA[i].request 141.3.1.4 PMD_UNITDATA[i].indication
70	141.3.1.5 PMD_SIGNAL[i].request 141.3.1.6 PMD_SIGNAL[i].indication 141.3.2 PMD block diagram
71	141.3.3 PMD transmit function 141.3.4 PMD receive function 141.3.5 PMD signal detect function 141.3.5.1 ONU PMD signal detect
72	141.3.5.2 OLT PMD signal detect 141.3.5.3 Nx25G-EPON signal detect functions 141.4 Wavelength allocation
73	141.5 PMD to MDI optical specifications for OLT PMDs 141.5.1 Transmitter optical specifications 141.5.2 Receiver optical specifications
78	141.6 PMD to MDI optical specifications for ONU PMDs 141.6.1 Transmitter optical specifications
81	141.6.2 Receiver optical specifications
83	141.7 Definitions of optical parameters and measurement methods 141.7.1 Insertion loss 141.7.2 Test patterns 141.7.3 Wavelength and spectral width measurement 141.7.4 Optical power measurements 141.7.5 Extinction ratio measurements 141.7.6 Optical Modulation Amplitude (OMA) test procedure 141.7.7 Relative intensity noise optical modulation amplitude (RINxOMA) measuring procedure
84	141.7.8 Transmit optical waveform (transmit eye) 141.7.9 Transmitter and dispersion penalty (TDP) for 25G 141.7.9.1 Reference transmitter requirements 141.7.9.2 Channel requirements 141.7.9.3 Reference receiver requirements 141.7.9.4 Test procedure
85	141.7.10 Receive sensitivity 141.7.11 Stressed receiver conformance test 141.7.12 Jitter measurements 141.7.13 Laser on/off timing measurement 141.7.13.1 Definitions 141.7.13.2 Test specification
87	141.7.14 Receiver settling timing measurement 141.7.14.1 Definitions 141.7.14.2 Test specification
88	141.8 Environmental, safety, and labeling 141.8.1 General safety 141.8.2 Laser safety 141.8.3 Installation 141.8.4 Environment 141.8.5 PMD labeling
89	141.9 Characteristics of the fiber optic cabling 141.9.1 Fiber optic cabling model 141.9.2 Optical fiber and cable 141.9.3 Optical fiber connection
90	141.9.4 Medium Dependent Interface (MDI)
91	141.10 Protocol implementation conformance statement (PICS) proforma for Clause 141, Physical Medium Dependent (PMD) sublayer and medium for Nx25G-EPON passive optical networks 141.10.1 Introduction 141.10.2 Identification 141.10.2.1 Implementation identification 141.10.2.2 Protocol summary
92	141.10.3 Major capabilities/options
95	141.10.4 PICS proforma tables for Physical Medium Dependent (PMD) sublayer and medium for passive optical networks, type 25/10GBASE-PQ, 25GBASE-PQ, 50/10GBASE-PQ, 50/25GBASE-PQ, and 50GBASE-PQ 141.10.4.1 PMD functional specifications
96	141.10.4.2 PMD to MDI optical specifications for 25/10GBASE-PQG-D2 141.10.4.3 PMD to MDI optical specifications for 25/10GBASE-PQG-D3 141.10.4.4 PMD to MDI optical specifications for 25/10GBASE-PQX-D2
97	141.10.4.5 PMD to MDI optical specifications for 25/10GBASE-PQX-D3 141.10.4.6 PMD to MDI optical specifications for 25GBASE-PQG-D2 141.10.4.7 PMD to MDI optical specifications for 25GBASE-PQG-D3 141.10.4.8 PMD to MDI optical specifications for 25GBASE-PQX-D2
98	141.10.4.9 PMD to MDI optical specifications for 25GBASE-PQX-D3 141.10.4.10 PMD to MDI optical specifications for 50/10GBASE-PQG-D2 141.10.4.11 PMD to MDI optical specifications for 50/10GBASE-PQG-D3 141.10.4.12 PMD to MDI optical specifications for 50/10GBASE-PQX-D2
99	141.10.4.13 PMD to MDI optical specifications for 50/10GBASE-PQX-D3 141.10.4.14 PMD to MDI optical specifications for 50/25GBASE-PQG-D2 141.10.4.15 PMD to MDI optical specifications for 50/25GBASE-PQG-D3 141.10.4.16 PMD to MDI optical specifications for 50/25GBASE-PQX-D2
100	141.10.4.17 PMD to MDI optical specifications for 50/25GBASE-PQX-D3 141.10.4.18 PMD to MDI optical specifications for 50GBASE-PQG-D2 141.10.4.19 PMD to MDI optical specifications for 50GBASE-PQG-D3 141.10.4.20 PMD to MDI optical specifications for 50GBASE-PQX-D2
101	141.10.4.21 PMD to MDI optical specifications for 50GBASE-PQX-D3 141.10.4.22 PMD to MDI optical specifications for 25/10GBASE-PQG-U2 141.10.4.23 PMD to MDI optical specifications for 25/10GBASE-PQG-U3 141.10.4.24 PMD to MDI optical specifications for 25/10GBASE-PQX-U2
102	141.10.4.25 PMD to MDI optical specifications for 25/10GBASE-PQX-U3 141.10.4.26 PMD to MDI optical specifications for 25GBASE-PQG-U2 141.10.4.27 PMD to MDI optical specifications for 25GBASE-PQG-U3 141.10.4.28 PMD to MDI optical specifications for 25GBASE-PQX-U2
103	141.10.4.29 PMD to MDI optical specifications for 25GBASE-PQX-U3 141.10.4.30 PMD to MDI optical specifications for 50/10GBASE-PQG-U2 141.10.4.31 PMD to MDI optical specifications for 50/10GBASE-PQG-U3 141.10.4.32 PMD to MDI optical specifications for 50/10GBASE-PQX-U2
104	141.10.4.33 PMD to MDI optical specifications for 50/10GBASE-PQX-U3 141.10.4.34 PMD to MDI optical specifications for 50/25GBASE-PQG-U2 141.10.4.35 PMD to MDI optical specifications for 50/25GBASE-PQG-U3 141.10.4.36 PMD to MDI optical specifications for 50/25GBASE-PQX-U2
105	141.10.4.37 PMD to MDI optical specifications for 50/25GBASE-PQX-U3 141.10.4.38 PMD to MDI optical specifications for 50GBASE-PQG-U2 141.10.4.39 PMD to MDI optical specifications for 50GBASE-PQG-U3 141.10.4.40 PMD to MDI optical specifications for 50GBASE-PQX-U2
106	141.10.4.41 PMD to MDI optical specifications for 50GBASE-PQX-U3 141.10.4.42 Definitions of optical parameters and measurement methods
107	141.10.4.43 Characteristics of the fiber optic cabling and MDI 141.10.4.44 Environmental specifications
108	142. Physical Coding Sublayer and Physical Media Attachment for Nx25G-EPON 142.1 Overview 142.1.1 Conventions 142.1.1.1 State diagrams 142.1.1.2 Hexadecimal notation
111	142.1.1.3 Timers 142.1.1.4 Operations on variables
112	142.1.1.5 Operations on wrap-around variables 142.1.1.6 FIFO access operations
113	142.1.2 Delay constraints 142.1.3 Burst transmission
114	142.1.3.1 Default synchronization pattern parameters
115	142.2 PCS transmit data path 142.2.1 64B/66B line encoder
117	142.2.2 Scrambler 142.2.3 64B/66B to 256B/257B transcoder 142.2.4 FEC encoder 142.2.4.1 Low-density parity-check coding
120	142.2.4.2 FEC encoder processing
122	142.2.4.3 Interleaver
127	142.2.5 Transmit data path state diagrams 142.2.5.1 Constants
128	142.2.5.2 Variables
130	142.2.5.3 Functions
131	142.2.5.4 State diagrams 142.2.5.4.1 PCS Input process
132	142.2.5.4.2 PCS Framer process
133	142.2.5.4.3 PCS Transmit process
134	142.3 PCS receive data path 142.3.1 FEC decoder 142.3.1.1 Receive interleaving
135	142.3.2 256B/257B to 64B/66B transcoder 142.3.3 Descrambler
136	142.3.4 64B/66B decoder
137	142.3.5 Receive data path state diagrams 142.3.5.1 Constants
138	142.3.5.2 Variables
140	142.3.5.3 Functions
141	142.3.5.4 OLT Synchronizer process state diagram 142.3.5.5 ONU Synchronizer process state diagram
142	142.3.5.6 PCS ONU BER Monitor process
143	142.3.5.7 PCS Output process 142.4 Nx25G-EPON PMA 142.4.1 Service Interface
144	142.4.1.1 PMA_UNITDATA[i].request 142.4.1.1.1 Semantics of the service primitive 142.4.1.1.2 When generated 142.4.1.1.3 Effect of receipt 142.4.1.2 PMA_UNITDATA[i].indication 142.4.1.2.1 Semantics of the service primitive 142.4.1.2.2 When generated 142.4.1.2.3 Effect of receipt
145	142.4.1.3 PMA_SIGNAL[i].request 142.4.1.4 PMA_SIGNAL[i].indication 142.4.1.4.1 Semantics of the service primitive 142.4.1.4.2 When generated 142.4.1.4.3 Effect of receipt 142.4.2 Differential encoder
146	142.4.3 Differential decoder 142.4.4 PMA transmit clock 142.4.4.1 Loop-timing specifications for ONUs 142.4.5 TCDR measurement 142.4.5.1 Definitions 142.4.5.2 Test specification
148	142.5 Protocol implementation conformance statement (PICS) proforma for Clause 142, Physical Coding Sublayer and Physical Media Attachment for Nx25G-EPON 142.5.1 Introduction 142.5.2 Identification 142.5.2.1 Implementation identification 142.5.2.2 Protocol summary
149	142.5.3 PCS capabilities/options 142.5.4 PCS processes
150	142.5.5 PMA processes
151	143. Multi-Channel Reconciliation Sublayer 143.1 Overview 143.2 Summary of major concepts
152	143.2.1 Concept of a logical link and LLID 143.2.2 Concept of an MCRS channel 143.2.3 Binding of multiple MACs to multiple xMII instances
153	143.2.4 Transmission and reception over multiple MCRS channels 143.2.4.1 Transmission unit 143.2.4.2 Transmission envelopes 143.2.4.3 Envelope headers
154	143.2.4.4 Interpacket gap adjustment
155	143.2.5 Dynamic channel bonding
156	143.2.5.1 LLID transmission over multiple MCRS channels
157	143.2.5.2 MCRS channel skew remediation mechanism 143.2.5.3 EnvTx and EnvRx buffers
159	143.2.5.4 Envelope position alignment marker 143.2.6 MDIO addressing model for multi-channel architecture
161	143.3 MCRS functional specifications 143.3.1 MCRS interfaces 143.3.1.1 PLS service primitives
162	143.3.1.1.1 Mapping of PLS_DATA[ch].request primitive 143.3.1.1.2 Mapping of PLS_SIGNAL[ch].indication primitive 143.3.1.1.3 Mapping of PLS_DATA[ch].indication primitive
163	143.3.1.1.4 Mapping of PLS_DATA_VALID[ch].indication primitive 143.3.1.1.5 Mapping of PLS_CARRIER[ch].indication primitive 143.3.1.2 MCRS control primitives 143.3.1.2.1 MCRS_CTRL[ch].request(link_id, epam, env_length) primitive 143.3.1.2.2 MCRS_CTRL[ch].indication() primitive 143.3.1.2.3 MCRS_ECH[ch].indication(Llid) primitive 143.3.1.3 XGMII interfaces 143.3.1.4 25GMII interfaces
164	143.3.2 Envelope header format
165	143.3.2.1 CRC8 calculation test sequences
166	143.3.3 Transmit functional specifications
167	143.3.3.1 Conventions 143.3.3.2 Application-specific parameter definitions 143.3.3.3 Constants
168	143.3.3.4 Variables
170	143.3.3.5 Functions
172	143.3.3.6 State diagrams 143.3.3.6.1 Input process 143.3.3.6.2 Transmit process
174	143.3.4 Receive functional specifications
175	143.3.4.1 Conventions 143.3.4.2 Constants
176	143.3.4.3 Variables
177	143.3.4.4 Functions
178	143.3.4.5 State diagrams 143.3.4.5.1 Receive process
179	143.3.4.5.2 Output process 143.4 Nx25G-EPON MCRS requirements 143.4.1 Nx25G-EPON architecture
181	143.4.1.1 MCRS channels 143.4.1.2 Symmetric and asymmetric data rates
182	143.4.1.3 Nx25G-EPON application-specific parameters 143.4.1.3.1 Constants 143.4.1.3.2 Transmit variables 143.4.2 MCRS time synchronization
183	143.4.3 Delay variability constraints 143.4.4 Asymmetric rate operation
186	143.5 Protocol implementation conformance statement (PICS) proforma for Clause 143, Multi-Channel Reconciliation Sublayer 143.5.1 Introduction 143.5.2 Identification 143.5.2.1 Implementation identification 143.5.2.2 Protocol summary
187	143.5.3 Generic MCRS 143.5.4 MCRS in Nx25G-EPON 143.5.4.1 Major capabilities/option
188	143.5.4.2 MCRS implementation in Nx25G-EPON
189	144. Multipoint MAC Control for Nx25G-EPON 144.1 Overview 144.1.1 Principles of point-to-multipoint operation 144.1.1.1 Transmission arbitration
190	144.1.1.2 Concept of logical links
192	144.1.1.3 ONU discovery and registration 144.1.2 Position of Multipoint MAC Control (MPMC) within the IEEE 802.3 hierarchy 144.1.3 Functional block diagram 144.1.4 Service interfaces 144.1.4.1 MAC Control service (MCS) interface
195	144.1.4.2 MAC Control interconnect (MCI) 144.1.4.3 MAC service Interface 144.1.4.4 MCRS Control interface 144.1.5 Conventions 144.2 Protocol-independent operation
196	144.2.1 Control Parser and Control Multiplexer 144.2.1.1 Constants 144.2.1.2 Counters 144.2.1.3 Variables
197	144.2.1.4 Functions
198	144.2.1.5 Control Parser state diagram
199	144.2.1.6 Control Multiplexer state diagram 144.3 Multipoint Control Protocol (MPCP) 144.3.1 Principles of Multipoint Control Protocol (MPCP) 144.3.1.1 Ranging measurement and time synchronization
202	144.3.1.2 Granting access to the PON media by the OLT
203	144.3.2 MPCP block diagram
205	144.3.3 Delay variability requirements 144.3.4 Logical link identifier (LLID) types 144.3.4.1 Physical Layer ID (PLID)
206	144.3.4.2 Management link ID (MLID) 144.3.4.3 User link ID (ULID) 144.3.4.4 Group link ID (GLID) 144.3.5 Allocation of LLID values
207	144.3.6 MPCPDU structure and encoding
208	144.3.6.1 GATE description
210	144.3.6.2 REPORT description
212	144.3.6.3 REGISTER_REQ description
213	144.3.6.4 REGISTER description
215	144.3.6.5 REGISTER_ACK description
217	144.3.6.6 DISCOVERY description
219	144.3.6.7 SYNC_PATTERN description
221	144.3.7 Discovery process
223	144.3.7.1 Constants
224	144.3.7.2 Counters 144.3.7.3 Variables
226	144.3.7.4 Functions
227	144.3.7.5 Messages 144.3.7.6 Discovery Initiation state diagram
228	144.3.7.7 Registration Completion state diagram
229	144.3.7.8 ONU Registration state diagram
231	144.3.8 Granting process 144.3.8.1 Constants
232	144.3.8.2 Counters 144.3.8.3 Variables
233	144.3.8.4 Functions 144.3.8.5 Timers 144.3.8.6 Messages 144.3.8.7 GATE Generation state diagram
234	144.3.8.8 GATE Reception state diagram 144.3.8.9 OLT Envelope Commitment state diagram
235	144.3.8.10 ONU Envelope Commitment state diagram
236	144.3.8.11 Envelope Activation state diagram 144.3.9 Discovery process in dual-rate systems 144.3.9.1 OLT rate-specific discovery
237	144.3.9.2 ONU rate-specific registration
238	144.4 Channel Control Protocol (CCP) 144.4.1 CCP block diagram
239	144.4.2 Principles of Channel Control Protocol
240	144.4.2.1 Disabling a downstream channel at an ONU 144.4.2.2 Enabling a downstream channel at an ONU 144.4.2.3 Disabling an upstream channel at an ONU
241	144.4.2.4 Enabling an upstream channel at an ONU 144.4.2.5 Local channel state changes at an ONU 144.4.3 CCPDU structure and encoding
242	144.4.3.1 CC_REQUEST description
244	144.4.3.2 CC_RESPONSE description
245	144.4.4 Channel Control operation 144.4.4.1 Constants
246	144.4.4.2 Variables
247	144.4.4.3 Functions
248	144.4.4.4 Messages 144.4.4.5 OLT CCPDU processing state diagram
249	144.4.4.6 ONU CCPDU processing state diagram
250	144.5 Protocol implementation conformance statement (PICS) proforma for Clause 144, Multipoint MAC Control for Nx25G-EPON 144.5.1 Introduction 144.5.2 Identification 144.5.2.1 Implementation identification 144.5.2.2 Protocol summary
251	144.5.3 Major capabilities/options 144.5.4 PICS proforma tables for Multipoint MAC Control 144.5.4.1 Clock tracking 144.5.4.2 LLID
252	144.5.4.3 Protocol-independent state diagrams 144.5.4.4 MPCP
255	144.5.4.5 CCP
256	Annex A (informative) Bibliography
257	Annex 31A (normative) MAC Control opcode assignments
259	Annex 142A (informative) Encoding example for QC-LDPC(16952,14392) FEC and interleaving 142A.1 Example of initial control seed sequence 142A.2 QC-LDPC FEC encoder test vectors
267	Back Cover

Additional information

Standard Title	IEEE Standard for Ethernet Amendment 9: Physical Layer Specifications and Management Parameters for 25 Gb/s and 50 Gb/s Passive Optical Networks (Superseded)
Published Code	IEEE
Publication Date	2020

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