IDL Interface Definition Language
IETF Internet Engineering Task Force
IM Information Manager
IMEI International Mobile Equipment Identity
IMS IP Multimedia Subsystem
IMSI International Mobile Subscriber Identity
IMT International Mobile Telecommunication
IMT-DS Direct Sequence
IMT-MC Multi Carrier
IMT-SC Single Carrier
IMT-TC Time Code
IOT Inter Operability Tests
IOR Interoperable Object Reference
IP Internet Protocol
IR Incremental Redundancy
ISC Internetworking Services Card
ISDN Integrated Services Digital Network
Itf-b Interface Node B - OMC-R
Itf-r Interface RNC - OMC-R
ITU International Telecommunication Union
Iub Interface Node B - RNC
Iur Interface RNC - RNC
Iu-CS Interface RNC - CN Circuit Switch
Iu-PS Interface RNC - CN Packet Switch
Kbps Kilobits per second
L1, L2, L3 Layer , Layer 2, Layer3
LA Local Area
LAC Local Area Code
LAN Local Area Network
LCS LoCation Services
LLC Logical Link Control
LM Load Module
LMT Local Maintenance Terminal
LIF Low speed Interface
LQC Link Quality Control
M3UA SS7 MTP3 User Adaptation layer
MAC Medium Access Control
MAP Mobile Application Part
MBS Multi-standard Base Station (UTRAN)
MBS Maximum Burst Size (ATM)
MCR Minimum Cell Rate
MExE Mobile Execution Environment
MM Mobility Management
MMUX Mac Multiplexer
MSC Mobile Switching Centre
MSP Multiple Subscriber Profile
MTP3 Message Transfer Part level 3
MTP-3B Message Transfer Part level 3 Broadband
NAS Non Access Stratum
NBAP Node-B Application Part
NE Network Element
N/E Normal/ Emergency
NEM New element manager
NM Combined EM and SNM
NML Network Management Layer
NMS Network Management System
NPA Network Performance Analyser
NTP Network Time Protocol