(57 to 66 GHz)
2-WIRE
3,1 KHZ - 3,1 kHz audio
3D Ray-Tracing
3DTV
3G - Third Generation
3GPP - Third Generation Partnership Project
3GPP Access
3GPP2 - Third Generation Partnership Project 2
3PTY - Three party (supplementary service)
464XLAT
4G
4-WIRE
5G - Cellular technology beyond LTE, IMT-2020 conformant
5GMS
60 GHz
6rd
6TiSCH
7 KHZ - 7 kHz audio
AAL - ATM Adaptation Layer
AAS - Active Antenna Systems
Abstracted Network Information
Acceleration
ACCESS
access control
accessibility - can be accessed by users with disabilities
accountability
ACOUSTIC - cf. coupling, etc
acronym
ACT - Asynchronous Contact Tracing
ADAPTION - Adaption (adaptation), terminal, rate, etc
ADDRESSING - Addressing, numbering, routeing
ADMINISTRATION
ADSL - Asymetrical Digital Subscriber Line
ADSL2
ADSL2plus
Advertisement
AERONAUTICAL - cf. terrestrial, maritime, satellite, etc.
AFA - Autonomous Frequency Assignment
AFTR
AGEING - cf. Human Factors
Agriculture
AIP - Additional Information Presentation (supplementary service)
air flow
AIR INTERFACE - Air Interface for radiocommunications
Air Traffic Management - Air Traffic Management
ALARM
ALGORITHM - (security, encryption, ...)
AM - Amplitude Modulation
AMATEUR - Commercially available amateur radio equipment
AMBIENCE - Ambience listening (supplementary service)
AMPLIFICATION
AMSS - Aeronautical Mobile Satellite Service
AN - Access Network
ANALOGUE
Analysis
ANF - Additional Network Feature
anonymity
Anonymous Communication Reject - ACR
ANTENNA - Antenna, aerial
AOC - Advice of Charge
AP - Access Priority (supplementary service)
API - Application Programme Interface
APM - Application Transport Mechanism (SS7)
Application
application layer
AR Cloud
ARCHITECTURE - inc. reference models, etc
ARCU model
AREA SELECT - Area selection (supplementary service)
artificial intelligence
ASCI - Advanced Speech Call Items
ASiC - Associated Signature Containers
ASN.1 - Abstract Syntax Number one
assessment
Assistive Listening
assurance
ATM - Asynchronous Transfer Mode
ATS - Abstract Test Suite
ATS_GR FILE - Seperate ATS graphical file exists
ATS_MP FILE - Seperate ATS mp file exists
Attribute Attestation
Audience
AUDIO
audio frequency induction loop
audio-PMSE
AUDIOTEX
Augmented Reality
AUTH - Call authorised by dispatcher (supplementary service)
authentication
authorization
automation
Automotive
Autonomic Networking
AVAILABILITY - QoS characteristic
AVI - AudioVisual Information
award criteria
B2B - Business to business
B2C - Business to customer
B4
Back haul
backhaul
bandwidth
BASE STATION - cf. radio
BASIC - cf. Call, Service, Access, etc.
battery
BC - Bearer Capability information element (ISDN)
B-CHANNEL - Bearer channel
BEARER - cf. channel, service
BEM - Block Edge Mask
Benchmarking - Benchmarking
BICC - Bearer-independent call control
BIIS - BInary Signalling System for non-trunked PMR
B-ISDN - Broadband ISDN
B-ISUP - Broadband ISUP
bitcoin
Block Edge Mask
blockchain
BONDING - (electrical safety connection)
B-QSIG - Broadband QSIG
BR
BROADBAND - (inc. B-ISDN)
BROADCAST - point to multipoint message transfer - see "multipoint"
BROADCASTING - Broadcasting, TV, audio
BSS - Broadcast Satellite Services
BSSAP - BSS Application Part (GSM protocol)
BSV
BWA - Broadband Wireless Access
C REFERENCE POINT - C Reference point (ISDN)
CA - Conditional Access
CABLE
cables
CAdES - CMS Advanced Electronic Signature
Calculation
CALL BARRING - Call Barring (supplementary service)
Call Centre
CALM - Continuous Air Interface for Long and Medium distance
CAMEL - Customized applications for mobile network enhanced logic
CAP - Conformance Assessment Process
CARD - Intelligent Card
categorization
category
CB - Citizens Band (radio)
CBC - Cell Broadcast Centre (GSM)
CBDS - Connectionless Broadband Data Service
CBS - Cell Broadcast Service
CCBS - Completion of Call to Busy Subscriber
CCM - Container Infrastructure Service (CIS) Cluster Managem
CCM system
CCNL - Completion of Communications on not Logged-in
CCNR - Completion of Call on No Reply (supplementary service)
CCS - Common Channel Signalling
CDA - Call Distribution to Attendant (supplementary service)
CDHN - Convergent Digital Home Network
CDIV - Call Diversion (supplementary service)
CDMA - Code-Division Multiple Access
cdma2000 - Code-Division Multiple Access 2000
CDN - Content Delivery Network
CELL - (radio)
cellular - cellular (radio)
CENTREX
Certificate
CF - Call Forwarding (supplementary service)
CGNAT
channel bandwidths
Channel coding
channel modelling
CHARACTER - Characters, symbols, graphics, pictograms
CHARGING - Charging, billing, accounting
Chat
children - cf. Human Factors
CHIRPING
CI Plus - CI Plus
CI/CD - Continuous Integration and Continuous Delivery
CIRCUIT MODE
Citizen
CL - Connectionless, non-connection-oriented
CLAT
Climate change mitigation - Reductions in human emissions of greenhouse gases
CLIP - Calling Line Identification Presentation (supp. service)
CLIR - Calling Line Identification Restriction (supp. service)
closed control loop
CLOUD
Cloud computing
Cloud Gaming
cloud-native
CMTS - Cable Modem Termination System
CNAP - Calling Name Presentation (supplementary service)
CNIP - Calling Name Identification Presentation (supplementary ser)
CNIR - Calling Name Identification Restriction (supplementary serv)
CO - Call Offer (supplementary service)
CO2 emission
coaxial
cochlear implant
CODEC - COder/DECoder
CODING
coexistence
Cognition
cognitive
COLP - COnnected Line identification Presentation (supp. service)
COLR - COnnected Line identification Restriction (supp. service)
Commerce
Communications module
companion screen
CONF - Conference (supplementary service)
CONFIDENTIALITY - (security)
CONFIGURATION
conflict detection
CONFORMANCE - Conformance of an equipment to a standard
conformity
CONNECTION-ORIENTED - CONNECTION ORIENTED
CONNECTOR
CONP - Connected Name Identification Presentation (supp. service)
Container
Content
Context capturing and analysis
CONTRIBUTION - (to TV distribution network)
CONTROL
Control Interface
Conversation
cooling capacity
coordination
COP - Code Of Practice
Core Network
cost impact
Countermeasures
COUPLING - (electric, magnetic, acoustic)
Covid
CPE - Customer Premise Equipment
C-PMSE - Cognitive Programme Making Special Events
CR - Call Restriction (supplementary service)
CRA
Critical Infrastructure
CROSS CONNECT
CROSSTALK - (in transmission cables, ...)
CRS - Cognitive Radio System
CS1 - Capability Set 1
CS2 - Capability Set 2 (IN)
CS3 - Capability Set 3 (IN)
CS4 - Capability Set 4 (IN)
CSFB
CSMA - Carrier Sense Multiple Access
CST - Call Setup Time
CSTA - Computer-supported telephony applications
CT - Cordless Telephone
CT2 - Cordless Telephone - 2nd generation
CTAN - Cordless terminal authentication - terminal (supp. svce.)
CTAT - Cordless terminal authentication - network (supp. svce.)
CTE - Circuit-Terminating Equipment
CTM - Cordless Terminal Mobility
CTS - Conformance Test Services
CTSD
CUG - Closed User Group (supplementary service)
Customer Premises Networks
CVG - Convergence (layer)
CW - Call Waiting (supplementary service)
Cyber
Cyber Security
Cyber-defence
Cybersecurity
D2-MAC - TV (see MAC)
DAA - Detect-And-Avoid
DAB - Digital Audio Broadcasting
DAM - DECT Authentication Module
DASH
DATA
Data Centres
data collection
data interoperability - data interoperability
data management
data mechanism
data models
data preservation
data processing
data sharing
data storage
data usability - ability of a user to derive useful information from data
D-band
DCE - Data Circuit terminating Equipment
D-CHANNEL - ISDN signalling channel
DCS - (extension of GSM)
DDI - Direct Dialling In (supplementary service)
Decentralized Identifier - DID
DECT - Digital Enhanced Cordless Telecommunications
DECT-2020
definitions
de-jitter buffer
delay
deployement trial
deployment scenarios
design
Design for All - cf. Human Factors
device
device complexity
DevOps - Development and Operat
DFRS - Digital Fixed Radio Systems
Diameter
dictionary
DIGITAL
digital certificate
Digital Clone
digital identity - digital identity
Digital Right Management
digital signature
Digital Twins
digitalized
DIRECTORY
DISABILITY - cf. Human Factors
DISCRETE - Discrete listening (supplementary service)
DISKETTE - Diskette associated with this item
Distortion
distributed
distributed filters
Distributed Ledger
distribution
Diversity - cf. Human Factors
DLC - Data Link Control
DMAP - DECT Multimedia Access Profile
DMO - Direct mode operation (TETRA)
DND - Do Not Disturb (supplementary service)
DNS - Domain name system
DOCSIS - Data Over Cable Service Interface Specification
Double talk
dPMR - digital Private Mobile Radio
DPRS - DECT Packet Radio Service
DQDB - Distributed Queue, Double Bus
DRM - Digital Radio Mondiale
DROES - Data Receive Only Earth Stations (satellite)
DRRS - Digital Radio Relay System
DRX - Discontinuous (radio) reception
DSB - Double Side Band
DSC - Digital Selective Calling
DSLAM - Digital Subscriber Line Access Multiplexer
DS-Lite
DSRC - Dedicated Short Range Communications
DSRR - Digital Short Range Radio
DSS1 - Digital Subscriber Signalling no. 1 (ISDN)
DSS2 - Digital Subscriber Signalling no. 2 (B-ISDN)
DTE - Data Terminal Equipment
DTH - Direct to the home (satellite broadcasting)
DTM - Dynamic synchronous transfer mode (transmission / switching)
DTMF - Dual Tone Multi-Frequency (in-band signalling)
DTX - Discontinuous (radio) transmission
DVB - Digital Video Broadcasting
DVB-H - Digital Video Broadcasting Handheld
DVB-I
DVB-SH
Dynamic Triggering
Earphones
EARTH STATION - (satellite)
EARTHING
Ear-Worn Devices
E-band
ecall - Manual/automatic initiated emerg. call (TS12) from vehicle
ECHO
e-commerce - electronic commerce
Ecosystem
ECT - Explicit Call Transfer (supplementary service)
e-delivery services
EDGE - Enhanced Data Rates for GSM Evolution
EEER - Equipment Energy Efficiency Ratio
eHealth
EHF - Extremely High Frequency (30 GHz to 300 GHz)
E-INTERFACE - (GSM)
ELECTRIC
electronic preservation
electronic registered delivery
ELECTRONIC SIGNATURE
EMAIL - EMAIL
embedded
EMC - Electro-Magnetic Compatibility
EMERGENCY - Including maritime/terrestrial search & rescue
emergency services
EMF - electromagnetic field (cf safety)
EMISSION - Of unwanted signals, radiated/conducted (EMC)
eMLPP - enhanced Multi-Level Precedence and Pre-emption service
e-mobility
E-Model - (speech quality)
encryption
ENDORSEMENT - Endorsement of a Standard/Recommendation from another body
End-user
energy consumption
Energy Efficiency
Energy Management
enforcement
ENG - Electronic News Gathering (satellite)
Enhanced Mobile Broadband
enum - mapping E.164 numbers to URI (universal resource identifier)
ENv - ETSI deliverable - as a basis for CEN/CENELEC ENv
ENVIRONMENT
Environmental impact
EPC - Evolved Packet Core
EPG - Electronic Programme Guide
EPIRB - Emergency Position Indicating Radio Beacons
EQUIPMENT PRACTICE
ERDS - Electronic Registered Delivery Service
ER-GSM
ERMES - European Radio MEssaging System
ERROR HANDLING
ERS
eSSP - embedded Smart Secure Platform
ESV - Earth Station on board Vessel
ethernet
ethics
EU qualified
EUDI Wallet - EU Digital Identity Wallet
E-UTRA - Enhanced-UMTS Terrestrial Radio Access
EV - Electric Vehicle
Evaluation
EVOLUTION
eWarrant
e-waste management
Exposure
extended validation certificat - extended validation certificate
F5G
FACILITY
FAX - Facsimile
FDD - Frequency Division Duplexing
FDMA - Frequency Division Multiple Access
FEATURE KEY - (ISDN generic protocol)
FEC - Forward Error Correction
FIBRE - (optical)
Field trial
filtering
Fixed networks
flexible deployment
Flexilink
FM - Frequency Modulation
FMBS - Frame Mode Bearer Service
FOLLOW ME - Follow me supplementary service
Food
FPH - Free-Phone (supplementary service)
FPLMTS - Future Public Land Mobile Telecommunications System
FRAME MODE
FRAME RELAY
Framework
frequency range
FRMCS - Future Rail Mobile Communication System
Front haul
fronthaul
FS - Fixed Services
FSS - Fixed Satellite Services
FT - File Transfer
FTS - Fixed Terminal Subsystem
FTTR - Fibre To The Room
Full-Band
FUNCTIONAL - (ISDN generic protocol)
functional architecture
functional block
FWA - Fixed Wireless Access (cf RLL, WLL, FRA)
FWS - Fixed Wireless Systems
GAP - Generic Access Profile (DECT)
gap analysis
GATEKEEPER
GATEWAY
GEM
GEM 1.3
gender-balanced design
GENERIC
GFT - Graphical presentation Format (TTCN-3)
GLDB - Geo Location DataBase
GMDSS - Global Maritime Distress and Safety System
GMPRS - GEO (Geostationary Earth Orbit) Mobile Packet Radio Service
GMR - GEO (Geostationary Earth Orbit) Mobile Radio
GMR-1 - GEO (Geostationary Earth Orbit) Mobile Radio - family 1
GMR-2 - GEO (Geostationary Earth Orbit) Mobile Radio - family 2
GNSS - Global Navigation Satellite System
GPRS - General Packet Radio Service
graphical notation
green-house gas emission
GRIDS - GeneRic ID Services
GROUP 3 - (facsimile)
GROUP 4 - (facsimile)
group call
GROUP NUMBER - Dynamic Grp No Assignement (supplementary service)
GSM - Global System for Mobile communications
GSM_PHASE1 - GSM Phase 1
GSM_PHASE2 - GSM Phase 2
GSM_PHASE2_PLUS - GSM Phase 2+
GSM-R - GSM for Railways
GSO - Geostationary Satellite Orbit
GTP - GPRS Tunnelling Protocol
GTPv2-C - GPRS Tunnelling Protocol Version 2 - Control Plane
H.248 - ITU-T recommendation
H.323 - ITU-T recommendation
H.F. - High Frequency (3 MHz to 30 MHz)
HANDBOOK
handheld microphone
HANDOVER - (between cells, between networks)
handset
HANDSFREE - (voice terminal operation)
HAPS - High Altitude Platform Station
Harmonised standard
HDMAC - High Definition MAC
HDR - High Dynamic Range
HDR Composer
HDR Metadata Embedder
HDSL - High bit rate Digital Subscriber Line
HDTV - High Definition TV
Headphones
headset
HEALTH - Long term health aspects under RTTE directive. See SAFETY.
HEARING AID
Hearing Impairment
Hearing Loop System
HEO - Highly-inclined Elliptical Orbit (satellite)
HF - Human Factors
HFC - Hybrid Fibre Coaxial
hidden node - cf. Powerline
HIPERACCESS - high speed fixed radio access to customer premises
HIPERLAN - HIgh PErformance Radio Local Area Networks (LAN)
HIPERMAN - High performance radio metropolitain area networks
HLC - High Layer Capability information element (ISDN)
HOLD - (service)
Home Gateway
HomePlug AV
HTML - HyperText Mark-up Language
human voice communication
HYBRID - Mixed analogue/digital; or fibre/copper medium
IBCF - Interconnection Border Control Function
ICO - Intermediate Circular Orbit
ICONS - cf. Human Factors
ICS - Implementation Conformance Statement
ICT - Information and Communications Technology
ICT site hosting
ICT sites
ID - Identification, Identity
identification - identification
Identity
Identity proofing
IDL - Interface Description Language
IE - Information Element (ISDN signalling)
IEM - In-Ear Monitor
IIoT - Industrial Internet of Thing
IM - Intent Management
IM service interface
IMB
IMEI - International MS Equipment Identity (GSM)
IMMUNITY - ... to radiated/conducted interference (EMC)
impairment
Implant
IMS - IP Multimedia System
IMT - International Mobile Telecommunications
IMT-2000 - International Mobile Telecommunications 2000 (ITU project)
IMT-2020
IMT-Advanced - IMT-Advanced
IN - Intelligent Network
INAP - IN Application Protocol
INBAND - In band (signalling)
INCLUDE - Include Call (supplementary service)
inclusive design
incumbent
inductive
Industrial
Industry
Information assurance
INFORMATION MODEL - Information model (see X.720)
information preservation
instrumental
INT - call INTrusion (supplementary service)
Intelligence-defined Network
intelligent homes & buildings
intelligent mobility
intelligent transportation
Intelligibility
intent management
INTERACTION - (between services)
Interception
interconnection
INTERFACE
Interference Analysis
INTERNET
INTEROPERABILITY - between equipment from different suppliers
INTERWORKING - (between networks, between equipment in general)
ION - Identity Oriented Networks
IoT - Internet of Things
IoT platforms
IP - Internet Protocol
IP address
IP Address Resolution
IP Retention
IPCable - IP services in cable TV networks
IP-Network
IPR - Intellectual Property Right
IPTV - Internet Protocol TeleVision
IPv4
IPv6 - Internet Protocol version 6
ISAC - Integrated Sensing And Communications
ISDN - Integrated Services Digital Network
ISM - Industrial, Scientific and Medical radio band (433 MHz)
ISPBX - Integrated Services Private Branch Exchange
iSSP - integrated SSP
IST - Immediate Service Termination
ISUP - ISDN User Part (of SS7)
ITS - Intelligent Transport Systems
IXIT - Implementation, eXtra Information for Testing
jitter buffer
JSON
KEY ESCROW - (security)
Key Exchange
KEYPAD - (generic ISDN protocol)
keyword
Knowledge Graph
Knowledge-based Reasoning
KPI - KPI Performance Indicator
L2VPN
LAN - Local Area Network
Language
LAPB - Link Access Protocol, Balanced (packet signalling)
LAPD - Link Access Protocol, D-channel (ISDN)
large antenna array
LASER
LATE ENTRY - Late entry (supplementary service)
Lawful Disclosure
Lawful Interception - Lawful Interception
LAYER 1 - (of OSI 7-layer model)
LAYER 2 - (of OSI 7-layer model)
LAYER 3 - (of OSI 7-layer model)
LAYER 4 - (of OSI 7-layer model)
LAYER 6 - (of OSI 7-layer model)
LAYER 7 - (of OSI 7-layer model)
LBRDC - Low Bit Rate Data Communications
LC - LSA Controller
LC3plus - Low Complexity Communication Codec plus
LCA - Life Cycle Assessment
LE - Local Exchange
LEASED LINE
ledger
LEO - Low Earth Orbiting Satellite
levels
LF - Low Frequency (30 kHz to 300 kHz)
LH - Line Hunting (supplementary service)
License schemes
Lightweight Certificate Policy
LIST - List search call (supplementary service)
Listen Before Talk
listening effort
listening quality
LLC - Low Layer Compatibility information element (ISDN)
LMES - Land Mobile Earth Station (satellite)
LMSS - Land Mobile Satellite Services
LNB - Low Noise Block
local
LOCAL LOOP - (copper, fibre, radio, ...)
localisation
LOCATION - Location
LOUDNESS - (rating)
LOUDSPEAKING - (voice terminal)
LOWER LAYER - (of OSI 7-layer model)
LR - LSA Repository
LSA - Licensed Shared Access
LSA spectrum resource
LSE - Logical Secure Element
LSI - Logical Secure element Interface
LSN - Large Scale NAT
LTE - (LTE: 3GPP technology beyond UMTS/HSPA+)
LTE-Advanced - LTE-Advanced
LTN - Low Throughput Networks
M2CNP
M2M - Machine to Machine (Communication)
M2PA - Message Transfer Part 2 User Peer-to-Peer Adaptation Layer
M2UA - MTP2 user adaptation
M3UA - MTP3 user adaptation
MABR
MAC - Multiplex Analogue Components or Medium Access Control
MAGNETIC - (coupling)
MAINTENANCE - Maintenance
MAN - Metropolitan Area Network
MAN-Advanced - MAN-Advanced
MANAGEMENT - Management
Management Plane
Mandates
MANO - Management and Orchestration
Manufacturing
MAP - Mobile Access Protocol
mapping system
MARITIME - (Cf terrestrial, satellite, aeronautical)
market placement
Match percentage
maturity assessment
MBSFN
MBT - Model Based Testing
MCBTS - Multi Carrier Base Tranceiver Station
MCID - Malicious Call Identification (supplementary service)
MCOBA
M-Commerce - Mobile Commerce
MDAF - Management Data Analytics Function
Measurement
MEASUREMENT UNCERTAINTY - measurement uncertainties
MEC - Multi-Access Edge Computing
MEGACO - Media Gateway Controller
MEO - Medium Earth Orbit (satellite)
MES - Mobile Earth Station (satellite)
META-PROTOCOL
METASIGNALLING
METHODOLOGY
metrics
MF - Medium Frequency (300 kHz to 3 MHz)
MFCN - Mobile/Fixed Communication Network
MFF - Machine to machine Form Factor
MGC - Media Gateway Controller
MHEG - Multimedia/Hypermedia Experts Group
MHI - Message Handler Interface
MHP
MHS - Message Handling System
MICROCOMPUTER
microwave
midhaul
MIGRATION
Millimetre wave
MIMO - Multiple Input Multiple Output
mission critical applications
mission critical communication
ML watermarking - Machine Learning watermarking
MMC - Meet Me Conference (supplementary service)
MME - Mobility Management Entity
MMI - Man-Machine Interface, human factors
MMS - Multimedia Messaging Service
MMSS - Maritime Mobile Satellite Service
MO - Managed Object
MOBILE - (telecommunications in general)
MOBILITY - (concept of)
mobility support
MOCS - Managed Object Conformance Statement
Model
model-driven engineering
modelling
MODEM - MOdulator/DEModulator
MODULATION
Module
MONOMODE - Optical fibre; terminal equipment
MOS - Mean Opinion Score
MPA - Multi-PTN Attendant (supplementary service)
MPEG - Motion Picture Experts Group
MPLS - Multi Protocol Label Switching
MPTY - Multiparty (supplementary service)
MPX - Multiplex(er)
MRVT - MTP Routeing verification test
MS - Mobile (radio) Station
MS-Aloha - Mobile Slotted Aloha
MSAN - Multi-Service Access Node
MSAP - Mobile Service Access Point
MSC - Mobile system Switching Centre
MSN - Multiple Subscriber Number (supplementary service)
MSR - Multi Standard Radio
MSS - Mobile Satellite Service
MTA - Message Transfer Agent
MTP - Message Transfer Part (SS7)
MTP2 - Message Transfer Part layer 2
MTP3 - Message Transfer Part layer 3
MTS - Message Transfer System
multi service testing
MULTICALL - supplementary service; <1 cct-switched call per UE
MULTICHANNEL - Multiple 64 kbit/s channels
MULTIMEDIA - inc Hypermedia
MULTIMODE - Optical fibre; terminal equipment
multi-party computation
MULTIPOINT - multipoint to multipoint communication - see "broadcast"
MUX - Multiplex, multiplexing
MWI - Message Waiting Indication (supplementary service)
MWS - Multimedia Wireless Systems
mWT - millimetre wave, transmission
NAME - (generic identification supplementary services)
narrowband
NAT
NAT64
NAVIGATION - cf. Human Factors
NAVTEX - Navigation telegraph
NBI - Northbound Interface
NCF - Network Control Facilities
NE - Network Element
NETWORK
Network KQI
network management
Network Measurement
Network monitoring
Network Performance
Network scenarios
Next Generation Protocol
NFC - Near Field Communication
NFV - Network Functions Virtualization
NFVI - NFV Infrastructure
NGSI-LD
NICAM - Near-instantaneous companded audio multiplex
NINT - Network Interception (supplementary service)
NIT - Network Integration Testing
NMDS - Narrowband Multi-service Delivery System
NNI - Network-Network Interface
NOISE
Noise Cancellation
NOMADIC - Nomadic Wireless Access
non 3GPP access
NON-GSO - Non-GeoStationary Orbit
Normalized Certificate Policy
NP - Number Portablilty
NR - 3GPP 5G radio access technology
NS - Night Service (supplementary service)
NSS - Network Switching Subsystem
OAM - Operations And Maintenance
OAN - Optical Access Network
object audio
OBJECT IDENTIFIER - (ASN.1)
objective
ODA - Open Document Architecture
OFDM - Orthogonal Frequency-Division Multiplexing
OFDMA - Orthogonal Frequency-Division Multiple Access
Offloading
OIP - Originating Identification Presentation
OIR - Originating Identification Restriction
OKPI - Operational Key Performance Indicators
OLT - Optical Line Terminal
OMAP - Operations, Maintenance and Administration Protocol
ON - Optical Distribution Network
oneM2M
ONP - Open Network Provision
ontology - ontology
open source
Open Source Software - OSS
operational
OPTICAL - (fibre)
Optical Access Network
Optical Network Device
orchestration
OSA - Open Service Access
OSI - Open Systems Interconnection
OSS - Open Source Software
OSSS - Orthogonal Sequence Spread Spectrum
OTE - Open Testing Environment
OTT voice applications - OTT voice applications
OTT voice generic clients - OTT voice generic clients
OUTBAND - Out of band (signalling)
outdoor enclosure
PABX - Private Automatic Branch Exchange
PACKET MODE
PAD - Packet Assembler/Disassembler
PAdES - PDF Advanced Electronic Signature
PAGING
Pandemic
PAP - Public Access Profile
parallel task
parametrization
PAS - Publicly Available Specification
PAT
PATH
PATH REPLACEMENT - (ANF)
Payment
PAYPHONE
PCI - Programmable Communications Interface
PCM - Pulse Code Modulation
PCN - Personal Communications Network
PCTR - Protocol Conformance Testing Report
PDC - Programme Delivery Control (for domestic video/VCR)
PDH - Plesiochronous Digital Hierarchy
PDL - Permissioned Distributed Ledger
PDN - Public Data Network
PDO - Packet data optimized (TETRA)
PERFORMANCE - (inc. Quality of Service)
personalization - adaptation to personal preferences and needs
PES - PSTN/ISDN Emulation Subsystem
PHI - Packet Handler Interface
PHOTOGRAPHIC - (syntax)
Physical layer
PICS - Protocol Implementation Conformance Statement
PICTOGRAMS - cf. Human Factors
PINX - PTN Exchange
PISN - Private Telecommunication Network
PIXIT - Protocol Implementation, eXtra Information for Testing
PLANNING
plastic
PLAT
Platforms
PLCP - Physical Layer Convergence Procedure
PLMN - Public Land Mobile Network
PLUS - to cover for + as in Phase 2+
PMBS - Packet Mode Bearer Service
PMR - Private Mobile Radio
PMSE - Programme Making Special Events
POF - Plastic Optical Fiber
POINT-TO-MULTIPOINT
POINT-TO-POINT
policies
policy management
policy requirements
PON - Passive Optical Network
PORTABILITY
POTS - Plain Old Telephone Service
POWER - (radio transmission)
Power Measurement
Power over Coaxial Cable
POWER SUPPLY
powering
Powerline
pre-connectorized
prediction
PRIMARY - (rate, ISDN access)
PRIORITY CALL - Priority Call (supplementary service)
privacy
PRIVATE - (network)
PRM - Premium Rate service
PROCEDURE
procurement
PROFILE - (protocol stack)
Proof of Concept
propagation
PROTECTION - ...against transients, EMC, etc
PROTOCOL
Provenance
Provider
PSAP - Public Safety Answering Point
PSPDN - Packet Switched Public Data Network
PSS1 - Private network Q reference point Signalling System number 1
PSTN - Public Switched Telephone Network
PTS - Profile Test Specification
PUBLIC - (network)
Public key - Public key (encryption)
Public Safety
PUM - Private User Mobility
push - Push service (unsolicited information transfer to user)
PVC - Permanent Virtual Call
PWS - Public Warning System
PWSN - People With Special Needs
Q3 INTERFACE
QERDS - Qualified Electronic Registered Delivery Service
QoE - Quality of Experience
QoE layered model
QoS - Quality of Service
QREM - Qualified Registered Electronic Mail
QSIG - PTN signalling at the Q reference point
QUALITY
quantum cryptography
Quantum Key Distribution
Quantum Safe Cryptography
quick ODN
R2 - Signalling system R2
RACK
RADAR
RADIO
radio measurements
RADIO MIC - Wireless microphone
radio parameters
radiodetermination
railways
RAN
RAP - Radio Application Package
RATE - (transmission bit rate)
RC - Remote Control (supplementary service)
RCS - Rich Communication Suite
RDS - Radio Data System
RDSS - Radio Determination Satellite Service
real time - real time
Real World capture
Real-time text
RECEIVER - (radio, etc)
RED
Referential specification
registered e-delivery services
registered electronic mail
REGISTRATION - (see also ADMINISTRATION)
REGULATION - Signifies relevance to EC Directive.
RELAY - Radio relay
release
RELIABILITY
REM - Registered Electronic Mail
REMOTE - (control, surveillance, etc)
remote resources access
remote services access
renewable
REPEATER - (radio)
REPLICATION - of directories, etc
REPORT - Call report (supplementary service)
Request For Proposal (RFP)
Requirements
RES - Radio Equipment and Systems
residential network
resilience
resiliency
Retained Data
RETENTION - Call retention (supplementary service)
RETRIEVAL - document, database, etc
REV - Reverse charging
Reverberation
reverse
RF HW models
RF/analog impairments
RFID
R-GSM
RINA
RIS - Reconfigurable Intelligent Surfaces
risk assessment
risk management
RLAN - Radio Local Area Network
RLL - Radio in the Local Loop
RLP - Radio Link Protocol (GSM)
RNIS
RO - Receive Only
ROAMING - (mobile)
ROBUSTNESS
router
routing support
RPF - Reverse Power Feed
RRS - Reconfigurable Radio System
RTP
RTTH - Radio To The Home (DECT)
RTTT - Radio Transport and Traffic Telematics
Runtime
S REFERENCE POINT - S Reference Point
S/MIME
S11 - interface between the MME and S-GW
S1AP - S1 Application Protocol
SAFETY
SAR - Search And Rescue
SAREF
SARS-CoV-2
SATELLITE - (Cf terrestrial, aeronautical, maritime)
SBA - Service Based Architecture
SBI - SouthBound Interface
SC - Service Centre (GSM)
scalability
SCAS - Security Assurance Spec
SCCP - Signalling Connection Control Part (SS7)
scenarios
SCF - Selective Call Forwarding supplementary service
SCFB - SCF on Busy supplementary service
SCFNR - SCF on No Reply supplementary service
SCFU - SCF Unconditional supplementary service
SCHEDULING
SCL - SSP Common Layer
scoring
SCR - Screening (supplementary service)
SCRIPT - programme, sequence of commands
SCS - System Conformance Statement
SCTP - Simple Control Transmission Protocol (IETF)
SCWS - Smart Card Web Server
SDH - Synchronous Digital Hierarchy
SDL - Specification and Description Language
SDN - Software Defined Networks
SDR - Software Defined Radio
SDS - Short Data Service
SDSL - Symetrical / Short range Digital Subscriber Line
SE - Serial Call (supplementary service)
SECTION - (view across interface)
secure by default
secure element
secure e-mail
SECURITY
Security by default
Security mode - (Mobile Commerce)
Security requirements
SELCALL - Selective Calling (radio)
Self-Management
self-organization
Self-organizing
Semantic - Semantic
semantic reasoning
Sensor
server
SERVICE
service classification
service KQI
Session Initiation Protocol - SIP
SFC - Service Function Chain
SG - Signalling Gateway
SGW - Serving Gateway
sharing
SHF - Super High Frequency (3 GHz to 30 GHz)
SHORT NUMBER - Short number addressing
SHORT RANGE - (radio)
SIGNAL PROCESSING - SIGNAL PROCESSIng
SIGNALLING
SIGTRAN - Signalling transport (IETF WG)
SIM - Subscriber Identity Module (GSM)
Simulation
SIP - Supplementary Information Presentation (supp. service)
SIP-I - Session Initiation Protocol with encapsulated ISUP
SITE ENGINEERING
SLA - Service Level Agreement
Slicing
SLO - Service Level Objectives
smart agriculture
Smart Appliance
SMART CARD - embedded IC card
Smart Cities
smart city
smart contract
Smart Escalator
Smart Grid
Smart Identity
smart industry
Smart Interface
Smart Lift
smart manufacturing
smart meter - smart meter
Smart Voice-Controlled Device
smart water
Smart Watering
smartphone
SMATV - System Master Antenna TV
SME - Small and Medium-sized Enterprise
SMS - Short Message Service (GSM)
SMSCB - SMS Cell Broadcast
SMT - Surface Mount Technique
SN - Service Node
SNG - Satellite News Gathering
software
Software Reconfiguration
Software-Defined Networking
SOHO - Small Office Home Office
SoLSA - Support of Localised Service Area (SoLSA) (GSM)
sound - sound
Southbound Interface
SPACING - (between radio transmitters)
S-PCN - Satellite - Personal Communications Network (Cf PCN)
SPECIAL NEEDS - cf. Human Factors
Spectral Management
spectrum
spectrum regulation
SPEECH
SPI - Serial Peripheral Interf
Splitter - Device for separation of signals
SPREAD SPECTRUM - (radio transmission)
SRD - Short Range Device (radio)
SRDOC - System Reference Document
SS7 - CCITT Common Channel Signalling System No. 7
SSB - Single Side Band modulation
SSCF - Service Specific Co-ordination Function
SSCOP - Service Specific Connection Oriented Protocol
SS-CT - Call transfer (supplementary service)
SSF - Service Switching Function
SSIG - Terminal-Network signalling at the S reference point
SSL/TLS certificates
SSP - Smart Secure Platform
STAGE 1 - (of three stage method)
STAGE 2 - (of three stage method)
STAGE 3 - (of three stage method)
standardization impacts
standards framework
standards landscape
state of the art
STDMA - Self-Organizing Time Division Multiple Access
stereoscopic
STM - Synchronous Transport Module
storage
STORE - store and forward, stored speech services
structure-born speech
SUA - SCCP-user adaptation layer (IETF)
SUB - Subaddressing (supplementary service)
subjective testing
SUBSCRIBER
subtitle
Superwideband
SUPPLEMENTARY SERVICE - Supplementary service (also supp. service or ss.)
survey
Sustainability
SWAPPING
switch
SWITCHING
SYMBOLS - cf. Human Factors
SYNCHRONIZATION
SYSTEM
T REFERENCE POINT - T Reference point
TAA1 - TETRA Authentication Algorithm number 1.
TACTILE - MMI for the blind
TAXONOMY - Taxonomy
TC - Transaction Capabilities
TCAP - Transaction Capabilities Application Part (SS7)
TCI - TTCN-3 Control Interface
TCL - Test Case Library
TCP-based video services
TD-CDMA - Time Division - Code-Division Multiple Access
TDD - Time Division Duplexing
TDL
TDM - Time Division Multiplex
TDMA - Time Division Multiple Access (radio)
technological challenge
TELEACTION - ISDN teleservice
TELECOMMAND - inc. remote control
TELEMETRY
TELEPHONY
TELESERVICE
TELETEX
TELETEXT
TELEX
TERMINAL - (as opposed to NETWORK)
terminology
TERRESTRIAL - (Cf satellite, maritime, aeronautical)
TES - Transportable Earth Station (satellite)
test
Test Tool Interface
TESTING
TETRA - TErrestrial Trunked RAdio system
TETRAPOL - TETRA - Police (FDMA-PMR)
TEXT
TFI - Terminal Facility Identifier
TFT - Tabular presentation Format (TTCN-3)
TFTS - Terrestrial-Flight Telecommunications System
TH - Trunk Hunting (supplementary service)
thermal
Threat Analysis
threat intelligence
THz - TeraHertz
THz component technologies
THz materials
time series - time series
Timeslicing
Time-stamping - (security)
TIP - Terminating Identification Presentation
TIR - Terminating Identification Restriction
TMN - Telecommunications Management Network
TONE - Information tones on voice terminals/network
Total conversation
TP - Terminal Portability (supplementary service)
TPID - Talking party identification (supplementary service)
Traceability
TRAFFIC
Train
transceiver efficiency
transcoding
transformer
TRANSIENT - ... voltage, current, field, etc
transition
TRANSMISSION
TRANSMITTER - (radio)
TRANSPONDER - (satellite)
TRANSPORT
TRI - TTCN-3 Runtime Interface
TRUNKING - (PMR)
trust
trust services - (security)
Trustworthy AI
TSP1 - Test Synchronisation Protocol no. 1
TSS&TP - Test suite structure & test purposes
TTCN - Tree and Tabular Combined Notation
TTCN-3
TTP - Trusted Third Party
Tunnelling
TUP - Telephone User Part
TV - TeleVision
TVRO - TV Receive Only (satellite earth station)
U REFERENCE POINT - U reference point
UAN - Universal Access Number service
UCI - Universal Communications Identifier
UE Identity
UHDTV - Ultra High Definition TV
UHF - Ultra-High Frequency (300 MHz to 3 GHz)
UIC - Union Internationale des Chemins de fer
UICC - Universal Integrated Circuit Card
UIS - User Information System
UMB - Ultra Mobile Broadband
UML - Universal modelling language
UMTS - Universal Mobile Telecommunications System
UNB - Ultra Narrow Band
Unbundling - Unbundling in the local loop
UNDERGROUND - (environment)
UNDERWATER - (cabling)
UNI - User-Network Interface
UPnP - Universal Plug and Play
upper layer
UPS - Uninterruptible Power Supply
UPT - Universal Personal Telecommunications
UR - User Requirements
URI - Uniform Resource Identifier
usability - extent to which a product can be used
usage needs
USB - Universal Serial Bus
USBS - User Signalling Bearer Service
use case - use case
USER - (as opposed to Network)
User-Centric
USSD - Unstructured Supplementary Service Data
UTRA - UMTS Terrestrial Radio Access
UUS - User-User Signalling (supplementary service)
UWB - Ultra Wide Band
UWC 136 - Universal Wireless Communication (wrt TIA/EIA 136)
V INTERFACE - Interface from AN to LE (see Q.500)
V+D - Voice plus data (TETRA)
V2X
V5 INTERFACE - (see V INTERFACE)
VAD - Voice Activity Detection
VALIDATION - Of functional requirements, such as protocols, etc.
VB5 INTERFACE - Broadband interface from AN to SN
V-band
VC - Virtual Call
VCC - Virtual Card Calling service
VCR - Video Cassette Recorder
VDSL - Very high speed Digital Subscriber Line
VDSL1
VDSL2
VEMMI - Videotex Enhanced MMI (see Videotex, MMI)
Verifiable Registry
VHE - Virtual Home Environment
VHF - Very High Frequency (30 MHz to 300 MHz)
VIDEO
Video Security
Video Surveillance
VIDEOTEX
ViLTE - Video over LTE
VIM - Virtualised Infrastructure Manager
virtual services
Virtualisation - Virtualisation
VLF - Very Low Frequency (3 kHz to 30 kHz)
VM - Virtual Machine
VNF - Virtual Network Function
Vo5G - Voice over 5G
VOCABULARY - Vocabulary, jargon, technical terms, etc
VoDSL - Voice over DSL
VOICE - Voice band (300 Hz to 3,4 kHz) (Cf SPEECH)
VoIP - Voice over Internet Protocol
VoLTE
VoNR - Voice over New Radio
VOT - Tele-Voting service
VPN - Virtual Private Network
VSAT - Very Small Aperture Terminal (satellite earth station)
VSB - Vestigial Side Band amplitude modulation (VSB/AM)
Vulnerabilities
WAN - Wide Area Network
warrant
warrantry
WAS - Wireless Access Systems
Waste management
water consumption
W-band
WCDMA - Wideband Code-Division Multiple Access
WCG - Wide Colour Gamut
WDM - Wavelength Division Multiplexing
WDS - Wireless Data Systems
Wearable
WEEE - Waste of Electric and Electronical Equipment
white space
WIDE SCREEN - Wide Screen (16:9 aspect ratio for TV screens)
Wideband
WiMAX
Wireless
wireless ad-hoc network
Wireless charger
wireless mesh network
wireless microphone
wireless microphone system
WLAN
WLL - Wireless Local Loop (DECT)
WMAN - Wireless Metropolitan Area Network
WMAS
WoT - Web of Things
WPT - Wireless Power Transmission
WRS - Wireless Relay Station (DECT)
WTM - Wireless Terminal Mobility
X.21 - CCITT Recommendation X.21
X.25 - CCITT Recommendation X.25
X.28 - CCITT Recommendation X.28
X.31 - CCITT Recommendation X.31
X.32 - CCITT Recommendation X.32
X.500 - CCITT Recommendation X.500
X.75 - CCITT Recommendation X.75
XAdES - XML Advanced Electronic Signature
xDSL - (generic) Digital Subscriber Line
X-Haul
XML - Extensible Markup Language
XMLERS
YANG - Yet Another Next Generation