10G-EPON	10-Gigabit Ethernet Passive Optical Network
1G-EPON	1-Gigabit Ethernet Passive Optical Network
AC	Alternating Current
ALA	Advanced Link Aggregation
ALR	Adaptive Link Rate
AON	Active Optical Network
APD	Avalanche Photodiode
AWSM	Adaptive Watch Sleep Mode
BiPON	Bit Interleaving Passive Optical Network
B-CDR	Burst-mode Clock and Data Recovery
B-LA	Burst-mode Limiting Amplifier
B-TIA	Burst-mode Transimpedance Amplifier
BWmap	Bandwidth Map
CCECBE	Code of Conduct on Energy Consumption of Broadband Equipment
CDR	Clock and Data Recovery
CO	Central Office
CoC	Code of Conduct
CPE	Customer Premises Equipment
CPU	Central Processing Unit
CSM	Cyclic Sleep Mode
DBA	Dynamic Bandwidth Allocation
DC	Direct Current
DM	Dynamic Mechanism
DSCM	Digital Subcarrier Multiplexing
DSL	Digital Subscriber Line
DSP	Digital Signal Processor
DWBA	Dynamic Wavelength and Bandwidth Assignment
DWDM	Dense Wavelength Division Multiplexing
DWU	Delayed Wake-Up
EC	Energy Consumption
EE	Energy Efficiency
EER	Energy Efficiency Rating
eOAM	Ethernet Operations, Administration, and Maintenance
EPON	Ethernet Passive Optical Network
ETSI	European Telecommunications Standards Institute
ETSI EN	European Telecommunications Standards Institute—European Norm
FCSM	Fixed Cycle Scheduling Mechanism
FE	Fast Ethernet
FE P-t-P	Fast Ethernet Point-to-Point
FEC	Forward Error Correction
FM	Feedback Message
FTTH	Fiber to the Home
FTTP	Fiber to the Premises
FTTx	Fiber to the x
FWI	Full Watch Interval
GEPON	Gigabit Ethernet Passive Optical Network
GIANT	Grant Independent Allocation with Non-Overlapping Transmission
GPON	Gigabit Passive Optical Network
HSMA	Hybrid Sleep Mode Aware
HYRA	Hybrid Reservation and Allocation
IEEE	Institute of Electrical and Electronics Engineers
ISR	Initiate Sleep Request
ITU-T	International Telecommunication Union—Telecommunication Standardization Sector
IPTV	Internet Protocol Television
IP/WDM	Internet Protocol over Wavelength Division Multiplexing
IWU	Immediate Wake-Up
LA	Limiting Amplifier
LSI	Large Scale Integration
LWI	Link Wakeup Indicator
MIMO	Multiple-Input Multiple-Output
MNO	Mobile Network Operator
MPCP	Multi-Point Control Protocol
MTBF	Mean Time Between Failures
MW-PON	Multi-Wavelength Passive Optical Network
NG-PON2	Next-Generation Passive Optical Network 2
NPC	Normalized Power Consumption
OAN	Optical Access Network
ODN	Optical Distribution Network
OFDMA-PON	Orthogonal Frequency Division Multiple Access Passive Optical Network
OLT	Optical Line Terminal
OMCI	ONU Management and Control Interface Optical Network Coding ONC
ONC	Optical Network Coding
ONU	Optical Network Unit
P2MP	Point-to-Multipoint
PD	Photodetector
P-t-P	Point-to-Point
PHY	Physical Layer
PHY Sync	Physical Layer Synchronization
PIC	Photonic Integrated Circuit
PLOAM	Physical Layer Operations, Administration, and Maintenance
PMD	Physical Media Dependent
PON	Passive Optical Network
PoP	Points of Presence
QoS	Quality of Service
SA	Signal Activation
SERDES	Serializer/Deserializer
SIEPON	Service Interoperability in Ethernet Passive Optical Networks
SMA	Sleep Mode Aware
SNI	Service Node Interface
SPW	Sleep Mode with Periodic Wake-up
SR	Signaling Request
TDM	Time Division Multiplexing
TDM-PON	Time Division Multiplexing Passive Optical Network
TH	Threshold High
TIA	Transimpedance Amplifier
TL	Threshold Low
TLV	Type–Length–Value
Tx	Transmit
TRx	Transmit/Receive
TWDM-PON	Time and Wavelength Division Multiplexing Passive Optical Network
VoIP	Voice over Internet Protocol
WDM	Wavelength Division Multiplexing
Wi-Fi	Wireless Fidelity
WLAN	Wireless Local Area Network
WDM-PON	Wavelength Division Multiplexing Passive Optical Network
WSM	Watch Sleep Mode
WSleep	Watchful Sleep
XOR	Exclusive OR (logical operation)
XG-PON	10-Gigabit-capable Passive Optical Network
XGS-PON	10-Gigabit-capable Symmetrical Passive Optical Network