The abbreviations I used in the telecom technology introduction

1. Abbreviations mentioned in the lecture
 3GPP - 3rd
Generation Partnership Project
 ARPU – Average Revenue Per User
 AS - Application Server
 AVP - Attribute Value Pairs
 AWS - Amazon Web Services
 CAPEX – Capital Expense
 CI - Continuous Integration
 EC2 - Elastic Compute Cloud
 EPC – Evolved Packet Core
 EPS - Evolved Packet System
 ETSI - European Telecommunications Standards Institute
 eUTRAN - evolved UMTS Terrestrial Radio Access Network
 FDM - Frequency Division Multiplex
 FDMA - Frequency Division Multiple Access
 GGSN - Gateway GPRS Support Node
 GMSC – Gateway MSC
 GPRS - General Packet Radio Service
 GSM - Global System for Mobile communications
 HLR - Home Location Register
 HSS - Home Subscriber Server
 IaaS – Infrastructure as a Service
 IMS – IP Multimedia Subsystem
 ISP – Internet Service Provider
 LTE- Long Term Evolution
 MANO – Management and Orchestration
 MIMO - Multiple Input Multiple Output
 MME - Mobility Management Entity
 MMTel - Multimedia Telephony
 MPLS - Multiprotocol Label Switching
 MSC - Mobile Switching Center
 NaaS – Network as a Service
 NFV – Network Function Virtualization
 OFDM - Orthogonal Frequency Division Multiplex
 OFDMA - Orthogonal Frequency Division Multiple Access
 OMA - Open Mobile Alliance
 OPEX - Operational Expense
 PaaS – Platform as a Service
 PCEF - Policy and Charging Enforcement Function
 PCRF - Policy and Charging Rule Function
 PLMN - Public Land Mobile Network
 POTS – Plain Old Telephone System
 PSTN – Public Switch Telephony Network
 QAM – Quadrature Amplitude Modulation
 RAN – Radio Access Network
 RCS - Rich Communications Suite

2.  RTP – Real-time Transport Protocol
 SaaS – Software as a Service
 SBC – Session Border Control
 SDP – Session Description Protocol
 SGSN – Serving GPRS Support Node
 SIP – Session Initiation Protocol
 SLA – Service Level Agreement
 SON – Self Organize Networks
 SRVCC - Single Radio Voice Call Continuity
 UA – User Agent
 UE – User Equipment
 UMTS - Universal Mobile Telecommunications Service
 VCC - Voice Call Continuity
 VLR – Visited Location Register
 VNF – Virtual Network Function
 WDM – Wavelength Division Multiplexing
Some more abbreviations related to telecom
 AAA - Authentication Authorization Accounting
 ACA - ACcounting Answer
 ACR - ACcounting Request
 AKA - Authentication and Key Agreement
 AoC - Advice of Charge
 ASA - Abort Session Answer
 ASR - Abort Session Request
 BBERF - Bearer Binding and Event Reporting Function
 BGCF - Breakout Gateway Control Function
 BTS - Base Transceiver Station
 CAMEL - Customised Application for Mobile network Enhanced Logic
 CAP - CAMEL Application Part
 CCA - Credit Control Answer
 CCF - Charging Collection Function
 CCR - Credit Control Request
 CPM – Converged IP Massaging
 CSCF - Call Session Control Function
 DRA - Diameter Routing Agent
 DTMF - Dual Tone Multiple Frequency
 EAB - Enhanced Address Book
 EDGE - Enhanced Data rates for GSM Evolution
 EIR – Equipment Identification Repository
 ENUM - E.164 Number Mapping
 GCID - GPRS Charging IDentifier
 GIBA - GPRS-IMS-Bundled Authentication
 GTA - Group Total Allowance
 IARI - IMS Application Reference ID
 IBCF - Interconnection Border Control Gateway

3.  ICID - IMS Charging IDentifier
 ICSI - IMS communication service IDentifier
 IETF - Internet Engineering Task Force
 IMAP - Internet Message Access Protocol
 IP-CAN - Internet Protocol Connectivity Access Network
 IP-SM-GW - IP short message gateway
 ISR - Idle state Signaling Reduction"
 ITU - International Telecommunication Union
 IWF – Interworking Working Framework
 LBS – Location Based Service
 MBMS - Multicast/Broadcast Multimedia Service
 MGCF - Media Gateway Control Function
 MMS - Multimedia Messaging Service
 MRFC - Multimedia Resource Function Controller
 MRFP - Multimedia Resource Function Processor
 MSISDN - Mobile Subscriber ISDN Number
 MSRP – Message Session Relay Protocol
 NAB - Network Address Book
 NAS – Non Access Stratum
 OAuth - open standard for authorization
 OCB - Outgoing Call Barring
 OCS - Online Charging System
 OFCS - Offline Charging System
 OIR - Originating Identification Restriction
 PCN - Packet Core network Node (SGSN, S–GW, P–GW)
 PDF - Policy Decision Function
 PDP - Packet Data Protocol
 PS – Presence Server
 PUID – Public User ID
 QoS – Quality of Service
 QCI – QoS Class Identifier
 RLS - Resource List Server
 RRC - Radio Resource Control
 SBCF - Session Based Charging Function
 SDF- Service Data Flow
 SGID - Subscriber Group ID
 SGML - Subscriber Group Member List
 SIMPLE - Session initiation protocol for Instant Messaging and Presence Leveraging
Extensions
 SPR - Subscription Profile Repository
 SSO – Single Sign On
 TDF - Traffic Detection Function
 TIP - Terminating Identification Presentation
 TISPAN - Telecommunication and Internet converged Services and Protocols for
Advanced Networking
 UDR - User Data Repository
 USIM - Universal Subscriber Identity Module
 XCAP - XML Configuration Access Protocol

4.  XDM – XML Document Management
 XML - Extensible Markup Language