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ESMA: European Securities and Markets Authority
ESP: Encapsulating Security Payload
ESQK: Emergency Service Query Key
ESRK: Emergency Service Routing Key
ESRN: Emergency Service Routing Number
ETC: E-UTRA Test Configuration
ETC2: Ericsson Texture Compression version 2
ETSI: European Telecommunications Standards Institute
ETU: Extended Typical Urban model
ETWS: Earthquake and Tsunami Warning System
EUI: Extended Unique Identifier
EUT: Equipment Under Test (UE or UE with ancillaries)
EUTRAN: Evolved UMTS Terrestrial Radio Access Network
EVA: Enhanced Vulnerability Analysis
EVC: Essential Video Coding
EVM: Error Vector Magnitude
EVS: Enhanced Voice Services
Estab: Establish (ed,ment)
F-SEID: Fully Qualified SEID
F-TEID: Fully Qualified Tunnel Endpoint Identifier
F1-C: F1 Control plane interface
F1-U: F1 User plane interface
F1AP: F1 Application Protocol
FA: Functional Alias
FAC: Fully Anechoic Chamber
FACH: Forward Access CHannel
FACoA: Foreign Agent Care-of-Address
FAP: cdma2000® 1x Femtocell Access Point
FAR: Forwarding Action Rule
FASMO: Frequent and Serious Misoperation
FB: Fullband
FBC: Flow Based Charging
FBW: Fractional Bandwidth
FCC: Federal Communications Commission
FCM: Firebase Cloud Messaging
FCP: File Control Parameters
FCS: Frame Check Sequence
FD: File Distribution
FD-CDM: Frequency division - code division multiple
FDD: Frequency Division Duplexing
FDIS: Final Draft International Standard
FDM: Frequency Division Multiplexing
FDMA: Frequency Division Multiple Access
FDN: Fixed Dialling Number
FDRA: Frequency domain resource allocation
FEC: Forward Error Correction
FECC: Far End Camera Control
FF: Far-Field
FFS: For Further Study
FFT: Fast Fourier Transformation
FIFO: First In, First Out
FIPS: Federal Information Processing Standard
FIR: Finite Impulse Response
FIRST: Forum for Incident Response and Security Team
FKP: (German) Flächen-Korrektur-Parameter (area correction parameter)
FL: Federated Learning
FLL: Frequency Locked Loop
FLOP: Floating point Operation*
FLR: Frame Loss Rate
FLS: Fused Location Server
FLUS: Framework for Live Uplink Streaming
FLUTE: File Delivery over Unidirectional Transport
FM: Fault Management
FMSS: Flexible Mobile Service Steering
FN-BRG: Fixed Network Broadband Residential Gateway
FN-CRG: Fixed Network Cable Residential Gateway
FN-RG: Fixed Network Residential Gateway
FOA: First Order Ambisonics
FOSS: Free Open-Source Software
FOV: Field Of View
FPACH: Fast Physical Access CHannel
FPS: First Person Shooter
FQDN: Fully Qualified Domain Name
FQPC: Fully Qualified Partial CDR
FR: Frequency Range
FR1: Frequency Range 1
FR2: Frequency Range 2
FRC: Fixed Reference Channel
FRER: Frame Replication and Elimination for Reliability
FRF: Frequency Reuse Factor
FS: Free Space
FSA: Frequency Selection Area
FSA ID: Frequency Selection Area Identity
FSK: Frequency-shift keying
FSOATS: Free Space OATS
FSPC: Feature Set Per Component-carrier
FSS: Fixed Satellite Services
FTA: Fine Time Assistance
FTAM: File Transfer, Access and Management
FTEID: Fully Qualified TEID
FTM: Frame Tunnelling Mode
FTP: File Transfer Protocol
FWA: Fixed Wireless Access
FoIP: Facsimile over IP
FoV: Field of view
G-CS-RNTI: Group Configured Scheduling RNTI
G-MOS-LQOfb: Global (Overall) - Mean Opinion Score - Listening Quality Objective - Fullband
G-MOS-LQOn: Global (Overall) - Mean Opinion Score - Listening Quality Objective - Narrowband
G-MOS-LQOw: Global (Overall) - Mean Opinion Score - Listening Quality Objective - Wideband
G-PCC: Geometry-based Point Cloud Compression