I	IFV
I	Information
I	Integer
I	interference
IA	Incoming Access
IAB	Integrated access backhaul
IAB	Interactive Advertising Bureau
IAL	inter-aerial links
IAM	Initial Address Message
IANA	Internet Assigned Number Authority
IANA	Internet Assigned Numbers Authority
IARI	IMS Application Reference Identifier
IARP	Inter-APN Routing Policies
IARP	Inter-APN Routing Policy
IBB	In-band blocking
IBC	Identity Based Cryptography
IBCF	Interconnect Border Control Function
IBCF	Interconnection Border Control Function
IBCF	Interconnection Border Control Functions
IBE	identity-based encryption
IBE	in-band emission
IBS	identity-based signatures
IC	Inactive Coding
IC	Interference Cancellation
ICA	Initiate Call Attempt
ICB	Incoming Call Baring
ICB	Incoming Call Barring
ICB	Incoming Communication Barring
ICB	Incoming Communications Barring
ICCC	IMS CS Control Channel
ICCF	IMS CS Control Function
ICD	Interface Control Document
ICE	Interactive Connectivity Establishment
ICE	ideal channel estimation
ICF	Identifier Caching Function
ICF	Identity Caching Function
ICF	Initial Connectivity Function
ICI	Incoming Call Information
ICI	Inter-Carrier Interference
ICIC	Inter-Cell Interference Cancellation
ICIC	Inter-Cell Interference Coordination
ICLPR	IN Calling Line presentation restriction
ICM	In Call Modification
ICM	Initial Codec Mode
ICMP	Internet Control Message Protocol
ICN	Information Centric Networks
ICO	Initial Connectivity Operator
ICP	Internet Code Point
ICS	IMS Centralized Services
ICS	Implementation Conformance Statement
ICS	In-channel selectivity
ICSI	IMS Communication Service Identification
ICSI	IMS Communication Service Identifier
ICSI	IMS-Communication-Service-Identifier
ICV	Integrity Check Value
IDC	In-Device Coexistence
IDL	Interface Definition Language
IE	Information Element
IE	Information Elements
IEC	Immediate Event Charging
IEF	Identity Event Function
IEI	Information Element Identifier
IEI	Information Element Identity
IEM	In-Ear-Monitoring
IETF	Internet Engineering Task Force
IF	intermediate frequency
IFF	Indirect far field
IFPEI	International Fixed Part Equipment Identity
IFPSI	International Fixed Part Subscription Identity
IGF	Intelligent Gap Filling
IHOSS	Internet Hosted Octet Stream Service
IIN	Issue Identification Number
IK	Integrity Key
IL	Insertion loss
ILCM	Incoming Leg Control Model
ILP	Inter-layer prediction
ILPC	Inner Loop Power Control
IM	IP Multimedia
IM	Identity management
IM	Information Model
IM	Instant Messaging
IM	Integrity Monitor
IM	Inventory Management
IM	interference mitigation
IMBE	Improved Multi-Band Excitation
IMC	IMS Media Coding
IMC	Internet Mail Consortium
IMDN	Instant Message Disposition Notification
IMEI	International Mobile Equipment Identities
IMEI	International Mobile Equipment Identity
IMGCF	Incoming Media Gateway Control Function
IMRN	IP Multimedia Routeing Number
IMRN	IP Multimedia Routing Number
IMS	IP Multimedia Subsystem
IMS	IP Multimedia Subsystems
IMS	IP Multimedia System
IMS	IP Multimedia subsystem
IMS	IP-Multimedia Subsystem
IMS	Identity Management Systems
IMSI	International Mobile Subscriber Identity
IMT	International Mobile Telecommunications
IMU	Inertial measurement unit
IMUN	International mobile user number
IN	Intelligent Network
INAP	Intelligent Network Application Protocol
INE	Interrogating Network Entity
INIPUI	IMS Network-Independent Public User Identities
INIPUI	IMS Network-Independent Public User Identity
IOC	Information Object Class
IOC	Information Object Classes
IOCWI	Inhibition Of Call Waiting Indication
IODE	Issue Of Data, Ephemeris
IOI	Inter Operator Identifier
IOI	Inter Operator Identifiers
IOI	Inter operator identifier
IOV	Input Offset Value
IOV	Input Offset Values
IP	Internet Protocol
IPA	IMMEDIATE PACKET ASSIGNMENT
IPD	Integrated Passive Device
IPEG	In-progress emergency group
IPEPC	In-progress emergency private call
IPEPC	In-progress emergency private communication
IPTI	Inter PDU Transmission Interval
IQF	Identifier Query Function
IQF	Identity Query Function
IR	Intermediate Rate
IRG	IMS Residential Gateway
IRI	Intercept Related Information
IRIP	Intended recipient identity presentation
IRP	Integration Reference Point
IRP	Integrations Reference Point
IS	Information Service
IS	Initialization Segment
IS	Initialization Segments
IS	Interference Suppression
IS	information Service
ISCP	Interference Signal Code Power
ISD	Initialization Segment Description
ISD	Inter Site Distance
ISD	Inter-site Distance
ISDN	Integrated Services Digital Network
ISIM	IM Subscriber Identity Module
ISIM	IMS Subscriber Identity Module
ISIM	Interference suppressing interference mitigation
ISL	Inter-Satellite Links
ISMA	Internet Streaming Media Alliance
ISMP	Inter-System Mobility Policy
ISP	Immittance spectral pairs
ISPI	Internetwork Service Profile Interrogation
ISPM	Internetwork Service Profile Modification
ISPT	Internetwork Service Profile Transfer
ISRP	Inter-System Routing Policy
IST	Immediate Service Termination
IT	Inactivity Test
ITCC	International telecommunication charge call
ITCC	International telecommunication charge card
ITI	Iu Timing Interval
ITRP	Information Time resource pattern
ITS	Intelligent Transport System
ITS	Intelligent Transport Systems
ITS	Intelligent transport system
ITS	intelligent transport systems
ITU	International Telecommunication Union
IUA	ICS User Agent
IUT	Implementation Under Test
IUT	Inter UE Transfer
IUT	Inter-UE Transfer
IV	Initialisation Vector
IV	Initialization Vector
IVR	Interactive Voice Response
IVS	In-Vehicle System