ABF Air blown fiber
ADM Add/drop multiplexer
ADSL Asymmetric digital subscriber line
ADSS All-dielectric self-supporting
AM Amplitude modulation
ANSI American National Standards Institute
AOC Active optical cable
AON All-optical network
APC Angled physical contact
APD Avalanche photodiode
APL Allowable path loss
APON Asynchronous transfer mode PON
APS Automatic protection switching
APVD Advanced plasma and vapor deposition
ASE Amplified spontaneous emission
ASOF Application-specific optical fibers
ASQ American Society for QUality
ATE Automatic test equipment
ATM Asynchronous transfer mode
AWG Arrayed waveguide grating
BER Bit error rate
BERT Bit error rate tester
BFOC Bayonet fiber-optic connector
BIF Bend-insensitive fiber
BIMMF Bend-insensitive multimode fiber
B-ISDN Broadband ISDN
BLEC Building local exchange carrier
B-PON Broadband passive optical network
CAP Competitive access provider
CATV Community antenna television
CCTV Closed circuit television
CD Chromatic dispersion
CEC Canadian Electrical Code
CEV Controlled environmental vault
CFP 100G form factor pluggable
CIL Channel insertion loss
CIR Cable index of refraction
CLEC Competitive local exchange carrier
CNR Carrier-to-noise ratio
CO Central office
CODEC Coder/decoder
CORD Center for Occupational Research and Development
CPE Customer premises equipment
CSA Canadian Standards Organization
CSF Cutoff shifted fiber
CSM Central strength member
CSMA/CD Carrier sense multiple access / collision detection
CSO Composite second order
CSRZ Carrier suppressed return-to-zero
CTB Composite triple beat
CW Center wavelength; continuous wave
CWDM Coarse wavelength division multiplexing
dB Decibel
DBFA Dual-band fiber amplifier
dBm Decibels relative to one milliwatt
DCC Data communication channel
DCE Data communications equipment
DCF Dispersion-compensating fiber
DCIM Data center infrastructure management
DCM Dispersion compensation module
DFB Distributed feedback (laser)
DGD Differential group delay
DGE Dynamic gain equalizer
DIB Dual-insulated buffer
DIP Dual inline package
DMD Differential mode delay
DML Directly-modulated laser
DOCSIS Data-Over-Cable-Service Interface Specification
DOP Degree of polarization
DOPL Differential optical path loss
DP-QPSK Dual polarization quadrature phase-shift keying
DPSK Differential phase-shift keying
DPSS Diode-pumped solid-state
DQPSK Differential quadrature phase-shift keying
DSx Digital signal (level)
DSF Dispersion-shifted fiber
DSL Digital subscriber line
DSP Digital signal processing
DTE Data terminal equipment
DWDM Dense wavelength division multiplexing
ECMA European Computer Manufacturers Association
EDA Equipment distribution area
EDFA Erbium-doped fiber amplifier
EF Encircled flux
EFM Ethernet in the first mile
EIA Electronic Industries Alliance
ELED Edge-emitting diode
EMB Effective modal bandwidth
EMD Equilibrium modal distribution
EMI Electromagnetic interference
EMP Electromagnetic pulse
EO Electrical–optical
EPON Ethernet passive optical network
ERK Emergency restoration kit
ESCON Enterprise System Connection
ESL Estimated splice loss
ETSI European Telecommunications Standards Institute
EVC Equivalent voice channels
FAT Fiber access terminal
FBG Fiber Bragg grating
FBT Fused biconical taper
FC Fiber connector
FCIA Fibre Channel Industry Association
FDB Fiber demarcation box
FDDI Fiber distributed data interface
FDF Fiber distribution frame
FDH Fiber distribution hub
FDM Frequency division multiplexing
FDU Fiber distribution unit
FEC Fiber entrance cabinet; forward error correction
FET Field effect transistor
FIFM Fiber in the first mile
FILM Fiber in the last mile
FITL Fiber in the loop
FM Frequency modulation
FOCIS Fiber Optic Connector IntermateabilityStandard
FOCS Fiber optic communication system
FORJ Fiber optic rotating joint
FOTP Fiber optic test procedure
FOTR Fiber optic transceiver
FOTS Fiber optic transmission system
FP Fabry-Perot (laser)
FRP Fiberglass rodent protection
FSAN Full Service Access Network
FSWDM Full spectrum wavelength division multiplexing
FTTA Fiber to the antenna
FTTB Fiber to the building or business
FTTC Fiber to the curb or cabinet
FTTD Fiber to the desk
FTTH Fiber to the home
FTTN Fiber to the node
FTTO Fiber to the office
FTTx Fiber to the premises
FWHM Full width, half maximum
FWM Four wave mixing
GbE Gigabit Ethernet
GBIC Gigabit interface converter
GD Group delay
GEM G-PON encapsulation method
GFF Gain flattening filter
GI-MMF Graded-index multimode fiber
GI-POF Graded-index plastic optical fiber
G-PON Gigabit PON
GRIN Gradient index
HASB High air-speed blown
HC Horizontal cross-connect
HDA Horizontal distribution area
HDPE High-density polyethylene
HDSL High bit rate digital subscriber line
HDTV High definition television
HFC Hybrid fiber coax
HFOC Hardened fiber-optic connector
HIPPI High performance parallel interface
HMFOC Hardened multifiber optical connector
HSTR High-speed Token Ring
HVAD Hybrid vapor axial deposition
IC Integrated circuit; or intermediate crossconnect
ICCF Interexchange Carrier Compatibility Forum
ICEA Insulated Cable Engineers Association
IDF Intermediate distribution frame
IEC International Electrotechnical Commission
IEEE Institute of Electrical and Electronics Engineers
IFC Intrafiber cabling
ILD Injection laser diode
ILEC Incumbent local exchange carrier
ILTA Integrable tunable laser assemblies
InGaAsP Indium gallium arsenide phosphide
IP Internet protocol
IPA Isopropyl alcohol
IPTV Internet protocol television
IOR Index of refraction
ISDN Integrated services digital network
ISI Intersymbol interference
ISO International Standards Organization
ISP Internet service provider
ITS Information transport system; intelligent transportation system
ITU International Telecommunications Union
IVD Inside vapor deposition
IXC Interexchange carrier
kpsi Thousand pounds per square inch
LAN Local area network
LATA Local access and transport area
LEC Local exchange carrier
LED Light-emitting diode
LIA Laser Institute of America
LID Local injection and detection
LSA Least square approximation
LSZH Low smoke zero halogen
LTGF Loose tube gel filled
LWP Low water peak
MAN Metropolitan area network
Mb Megabit
MC Main cross-connect
MCPC Mode conditioning patchcord
MCVD Modified chemical vapor deposition
MDA Main distribution area
MDF Main distribution frame
MDPE Medium-density polyethylene
MDU Multiple dwelling unit
MEM Micro-electro-mechanical
MFD Mode-field diameter
MFU Multiple family unit
minEMBc Minimum calculated effective modal bandwidth
MiniBNC Miniature bayonet Neill-Concelman
MLM Multilongitudinal mode
MMF Multimode fiber
MPD Mode power distribution
MPEG Moving Pictures Experts Group
MPLS Multiprotocol label switching
MPLS-TP MPLS transport profile
MPO Multifiber push-on connector
MRCL Maximum rated cable load
MSO Multiple system operator
MSP Managed service provider
MST Multifiber service terminal
MSTP Multiservice transport platform
MTBF Mean time between failures
MTDC Multitenant data center
MTP Multiple transfer push-on
MTRJ Mechanical transfer registered jack
MTU Multiple tenant unit
MUTOA Multiuser telecommunications outletassembly
NA Numerical aperture
NAP Network access point
NCC Network control center
NEBS Network equipment building system
NEC National Electrical Code
NECA National Electrical Contractors Association
NEMA National Electrical Manufacturers Association
NESC National Electrical Safety Code
NFPA National Fire Protection Association
NGI Next generation Internet
NIST National Institute of Standards and Technology
nm Nanometer
NOC Network operations center
NRZ Nonreturn to zero
ns Nanosecond
NTIS National Technical Information Service
NTSC National Television Standards Committee
NZDS Nonzero dispersion-shifted fiber
OA Optical amplifier
OADM Optical add/drop multiplexer
OAM Operations, administration and maintenance
OAM&P Operations, administration, maintenance and provisioning
OAN Optical access networking
OC Optical carrier
OCDMA Optical code division multiple access
OD Outside diameter; optical density
ODN Optical distribution network
ODU Optical demultiplexer unit
OE Optical-to-electrical
OEE Optical entrance enclosure
OEIC Optoelectronic integrated circuit
OEO Optical–electrical–optical
OFCP Optical fiber conductive plenum
OFCR Optical fiber conductive riser
OFDM Optical frequency division multiplexing
OFL Overfilled launch
OFLC Overfilled launch condition
OFNP Optical fiber nonconductive plenum
OFNR Optical fiber nonconductive riser
OFSTP Optical fiber system test procedures
OI Optical isolator
OLS Optical line system
OLT Optical line terminal
OLTS Optical loss test set
OM Optical multimode
OMU Optical multiplexer unit
ONT Optical network terminal
ONU Optical network unit
OOK On-off keying
OOO Optical–optical–optical
OPGW Optical power ground wire
OPM Optical power meter
OPS Optical protection switch
ORL Optical return loss
OS Optical single-mode
OSA Optical spectrum analyzer; optical subassembly; Optical Society of America
OSC Optical supervisory channel
OSHA Occupational Safety and Health Administration
OSI Open system interconnection
OSNR Optical signal-to-noise ratio
OSP Outside plant
OSS Operational support system
OTDM Optical time-division multiplexing
OTDR Optical time-domain reflectometer
OTN Optical transport network
OTU Optical translator unit
OVD Outside vapor deposition
OXC Optical cross-connect
P2MP Point-to-multipoint
P2P Point-to-point
PAS Profile alignment system
PBX Private branch exchange
PC Physical contact
PCM Pulse code modulation
PCVD Plasma chemical vapor deposition
PDC Polarization dependence of the center wavelength
PDFA Praseodymium-doped fiber amplifier
PDL Polarized dispersion loss
PDLC Polarization-dependent loss compensation
PDM Polarization division multiplexing
PE Polyethylene
PIC Photonic integrated circuit
PIN Positive-intrinsic-negative
PINFET Positive-intrinsic-negative field-effect transistor
PLC Planar lightwave circuit
PLOAM Physical layer operations, administration, and maintenance
PMD Polarization mode dispersion
PMDC Polarization mode dispersion compensation
PMQPSK Polarization multiplexed quadrature phase-shift keying
POF Plastic optical fiber
PON Passive optical network
POP Point of presence
POTP Passive optical transport platform
POTS Plain old telephone service
PPE Personal protective equipment
PSK Phase-shift keying
PSTN Public switched telephone network
PtP Point-to-point
PTZ Pan, tilt, zoom
PU Polyurethane
PVC Polyvinyl chloride; permanent virtual circuit
PVDF Polyvinylidene fluoride
PXC Photonic cross-connect
QAM adrature amplitude modulation
QDM Double-band amplitude modulation
QoS ality of service
QPSK adrature phase-shift keying
RADSL Rate adaptive digital subscriber line
RBOC Regional Bell operating company
RBS Rated breaking strength
RCVR Receiver
RF Radio frequency
RFI Radio frequency interference
RFoG Radio frequency over glass
RFTS Remote fiber test system
RIN Relative intensity noise
RML Restricted mode launch
ROADM Reconfigurable optical add/drop multiplexer
ROSA Receiver optical subassembly
ROW Rights of way
RT Remote terminal
RTM Reference test method
RTU Remote test unit
RU Rack unit
Rx Receive; receiver
SA Serving area
SAN Storage area network
SBS Stimulated Brillouin scattering
SCTE Society of Cable Telecommunications Engineers
SDH Synchronous digital hierarchy
SDM Spatial division multiplexing
SDS Safety data sheet
SDSL Symmetric digital subscriber line
SDV Switched digital video
SERDES Serializer/deserializer 
SFF Small form factor
SFP Small form factor pluggable
SHR Self-healing ring
SLED Surface-emitting LED
SLIC Subscriber line interface circuit
SLM Single longitudinal mode (laser)
SMA Subminiature type A connector
SMDS Switched multimegabit data service
SMF Single-mode fiber
SNMP Simple (or signalling) network managementprotocol
SNR Signal-to-noise ratio
SOA Semiconductor optical amplifier
SONET Synchronous optical network
SOP State of polarization
SPC Super physical contact
SPIE Society of Photographic Instrumentation Engineers
SPM Self phase modulation
SSB Single side band
STM Synchronous transfer mode
STP Shielded twisted pair
STS Synchronous transport signaling
SVC Switched virtual circuit
SVOD Switched video on demand
SWDM Short wavelength division multiplexing
TAXI Transparent asynchronous transmitter receiver interface
TC Telecommunications closet
TCP/IP Transport control protocol/Internet protocol
TDM Time division multiplexing
TDMA Time division multiple access
TEC Thermoelectric cooler
TIA Telecommunications Industry Association
TMC Traffic management center
TO Telecommunications outlet
TOSA Transmitter optical subassembly
TPON Telephony passive optical network
Tx Transmit; transmitter
TTL Transistor-transistor logic
UHDTV Ultra high definition television
UL Underwriters Laboratory
ULC Underfilled launch condition
UNI User network interface
UPC Ultra physical contact
UPS Uninterruptible power supply
UTP Unshielded twisted pair
UV Ultraviolet
VAD Vapor axial deposition
VCSEL Vertical-cavity surface-emitting laser
VFC Voice frequency channels
VOA Variable optical attenuator
VOD Video on demand
VoIP Voice over Internet protocol
VPN Virtual private network
VPON Video passive optical network
VSB Vestigial sideband
VT Virtual tributary
WA Work area
WAN Wide area network
WBMMF Wideband multimode fiber
WDM Wavelength division multiplexing
WHMIS Workplace Hazardous Material InformationSystem
WIC Wavelength independent coupler
WSS Wavelength selectable switch
WXC Wavelength cross-connect
XFP 10 Gigabit small form factor pluggable
XMD 10 Gb/s miniature device
XPM Cross phase modulation
ZDA Zone distribution area
ZWP Zero water peak
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