Glossary of Networking Terms

3G - Third Generation
3GPP, 3GPP2 - Third Generation Partnership Project, Project 2
AAA - Authentication, Authorization and Accounting
AAL - ATM Adaptation Layer
ACD - Automatic Call Distribution
ACTS - Automated Coin Toll Service
ADPCM - Adaptive Differential Pulse Code Modulation
AG - Access Gateway
AH - Authentication Header
AIN - Advanced Intelligent Network
AIS - Alarm Indication Signaling
AIX - Advanced Interactive Executive
ALCAP - Access Link Control Application Protocol
AMR - Adaptive Multi-Rate
ANDSF - Access Network Discovery and Selection Function
ANSI - American National Standards Institute
AP - Application Part
API - Application Programming Interface
APP - Application Marker
APS - Automatic Protection Switching
ARP - Address Resolution Protocol
AS - Application Server
ASN-1 - Abstract Syntax Notation One Encoder / Decoder
ASP - Application Service Provider
ASR - Audio Response System
ATCA - Advanced Telecommunications Computing Architecture
ATM - Asynchronous Transfer Mode
ATMARP - Asynchronous Transfer Mode Address Resolution Protocol
AuC - Authentication Center
B-ISUP - Broadband ISDN User Part
B2BUA - Back-to-Back User Agent
BDP - Business Decision Point
BGCF - Breakout Gateway Control Function
BICC - Bearer Independent Call Control
BM-SC - Broadcast / Multicast Service Center
BMC - Broadcast Multicast Control
BOOTP - Bootstrap Protocol
BRAS/MSS - Broadband Remote Access Switch / Multi Service Switch
BS - Base Station
BSC - Base Station Controller
BSS - Base Station System
BSSAP - Base Station System Application Part
BSSGP - Base Station Subsystem GPRS Protocol
BTS - Base Transceiver System
BTSM - BTS Management
CALA - Caribbean and Latin America
CAMEL - Customized Applications for Mobile Networks Enhanced Logic
CAN - Connectivity Access Network
CAP - CAMEL Application Part
CAPEX - Capital Expenditure
CBC - Cell Broadcast Center
CBN - Common Bonding Network
CC - Call Control, Connection Confirm
CCF - Charging Control Function
CCPU - Continuous Computing
CD-ROM - Compact Disc Read-Only Memory
CDMA - Code Division Multiple Access
CDVT - Cell Delay Variation Tolerance
CFR - Code of Federal Regulations
CGF - Charging Gateway Function
CGW - Charging Gateway
CID - Channel Identifier
CISPR - Comite International Spécial des Peturbations Radioélectriques (or International Special Committee on Radio Interference)
CLEI - Common Language Equipment Identifier
CLI - Command Line Interface
CLIP - Classical IP
CM - Connection Manager
CN - Core Network
COPS - Common Open Policy Service
COPS-PR - COPS Policy Provisioning
CORBA - Common Object Request Broker Architecture
COTS - Commercial Off-The-Shelf
CP-TA - Communications Platforms Trade Association
CPU - Central Processing Unit
CRF - Charging Rules Function
CS - Circuit Switched
CS2K - Communication Server 2000
CSA - Canadian Standards Association
CSCF - Call Session Control Function
CSE - CAMEL Service Environment
CSU - Computer Switching Unit
CSV - Comma Separated Values
DAT - Digital Audio Tape
DES - Diagnostic Error Signaling
DFT/HA - Distributed Fault-Tolerant / High Availability
DFT - Distributed Fault-Tolerant
DHCP - Dynamic Host Configuration Protocol
Diameter - Signaling protocol for AAA functions in IMS networks
DiffServ - Differentiated Services
DL - Data Link, Down Link
DLT - Digital Linear Tape
DNS - Domain Name System
DPI - Deep Packet Inspection
DPM - Downtime Performance Measurement
DS-0 - Digital Signal Zero (64Kbps)
DS-1 - Digital Signal One (1.544Mbps)
DS-3 - Digital Signal Three (44.7Mbps)
DS - Differentiated Services
DSCP - Dynamic Subnet Configuration Protocol
DSL - Digital Subscriber Line
DSLAM - Digital Subscriber Line Access Multiplexer
DSMIP - Dual Stack Mobile IP
DSP - Digital Signal Processing
DSU - Digital Switching Unit
DTMF - Dual Tone Multi-Frequency
DVD - Digital Video Disk
DVMRP - Distance Vector Multicast Routing Protocol
E1 - European Format Digital Signal Level 1
EADPCM - Embedded Adaptive Differential Pulse Code Modulation
EAP - Extensible Authentication Protocol
eBM-SC - Enhanced Broadcast / Multicast Service Center
eBS - Evolved Base Station
ECF - Event Charging Function
ECMP - Equal Cost Multi-Path
EIA - Electronic Industries Association
EIR - Equipment Identification Register
EM - Element Manager
EMC - Electromagnetic Compatibility
EMS - Element Management System
EN - European Norm
eNb - E-UTRAN NodeB
ENUM - Telephone Number Mapping
EPC - Evolved Packet Core
EPS - Evolved Packet System
ePDG - Enhanced Packet Data Gateway
ESI - End System Identifier
ESP - Encapsulating Security Payload
ETS - European Telecommunication Standard
ETSI - European Telecommunications Standards Institute
E-UTRAN - Evolved UTRAN
F1 - F1 Class of OAM
F3 - Virtual Path OAM
F5 OAM - Virtual Circuit OAM
FA - Foreign Agent
FAP - Femto Access Point
FCC - Federal Communications Commission
FGW - Femto Gateway
FITs - Failures per Billion Hours of Operation
FMECA - Fault Modes, Effects and Criticality Analysis
FP - Framing Protocol
FR - Frame Relay
FRU - Field Replaceable Unit
FT/HA - Fault-Tolerant / High Availability
FTP - File Transfer Protocol
FTTx - Fiber to the curb / home / premises
GAN - Generic Access Network
GANC - Generic Access Network Controller
GbE - Gigabit Ethernet
GERAN - GSM Edge Radio Access Network
GGSN - Gateway GPRS Support Node
GK - Gatekeeper
GMLC - Gateway Mobile Location Center
GMM/SM - GPRS Mobility Management and Session Management
GMSC - Gateway MSC
GPRS - General Packet Radio System

GPS - Global Positioning System
GRE - Generic Routing Encapsulation
GSM - Global System for Mobile Communications
GSN - GPRS Support Node
GSP - Global Service Provider
GTP - GPRS Tunneling Protocol
GTT - Global Title Translation
GUI - Graphical User Interface
GW - Gateway
H.248 - MEGACO, Media Gateway Control Protocol
H.323 - Umbrella protocol for H.255.0, H.245, H.450
HA - High Availability
H-AAA - Home AAA
HDLC - High-level Data Link Control
HDTV - High Definition Television
HLR - Home Location Register
HNB - Home NodeB
HSS - Home Subscriber Server
I-CSCF - Interrogating Call Session Control Function
i-SCSI - Internet Small Computer Systems Interface
I/F - Interface
I/O - Input / Output
IA - Intel Architecture
IAD - Integrated Access Device
IBN - Isolated Bonding Network
ICMP - Internet Control Message Protocol
IEC - Inter Exchange Carrier
IEEE - Institute of Electrical and Electronics Engineers
IETF - Internet Engineering Task Force
IGMP - Internet Group Management Protocol
IKE - Internet Key Exchange
ILMI - Integrated Local Management Interface
IM - Instant Messaging
IM-SSF - IP Multimedia - Service Switching Function
IME - Interface Management Entity
IMS - IP Multimedia Subsystem
IMS-MGW - IP Multimedia Subsystem Media Gateway Function
IN - Intelligent Network
INAP - Intelligent Network Application Protocol
InATMARP - Inverse ATMARP
IOS - Inter-Operability Specifications
IP - Internet Protocol
IP PBX - Internet Protocol Private Branch Exchange
IP-SP - IP-Signaling Point
IPBCP - IP Bearer Control Protocol
IPoA - IP over ATM
IPsec - IP Security
IPT - Integrated Project Team
IPTV - IP Television
IRIG-B - Inter Range Instrumentation Group mod B
ISC - IMS Service Control
ISDN - Integrated Services Digital Network
ISG - Intelligent Services Gateway
ISO/IEC - International Organization of Standardization / International - Electrotechnical Commission
ISUP - ISDN User Part
ITU-T - International Telecommunications Union Telecom sector
IUA - ISDN Q.921 User Adaptation Layer
IVR - Interactive Voice Response
IWGW - Interworking Gateway
IWMSC - Interworking MSC
JFS - Journaling File System
JTAG - Joint Test Action Group
KVM - Keyboard Video Mouse
L1 - Layer 1 in OSI Model (Physical Layer)
L2 - Layer 2 in OSI Model (Data Link layer)
L2F - Layer 2 Forwarding
L2TP - Layer 2 Tunneling Protocol
LAN - Local Area Network
LAPB - Link Access Procedure Balanced
LAPC - Link Access Procedure for Control Plane
LAPD - Link Access Protocol on D channel
LAPDm - LAPD Mobility
LAPV5 DL - Link Access Protocol V5 Data Link
LAPV5 EF - Link Access Protocol V5 Envelope Function
LB - Load Balancing
LBS - Location-Based Services
LCS - Location Services
LDAP - Lightweight Directory Access Protocol
LDF - Load Distribution Function
LE - Local Exchange
LL - Local Loop
LLC - Logical Link Control
LMA - Local Mobility Anchor
LMI - Local Management Interface
LMU - Location Management Unit
LNP - Local Number Portability
LOC - Location Center
LSR - Label Switch Router
LTE - Long-Term Evolution
M2PA - MTP2 Peer-to-Peer Adaptation Layer
M2UA - MTP2 User Adaptation Layer
M3UA - MTP3 User Adaptation Layer
MAC - Media Access Control
MAG - Mobile Access Gateway
MAP - Mobile Application Part
MBMS - Multimedia Broadcast Multicast Service
MBS - Maximum Burst Size
MCE - Multi-cell / multicast Coordination Entity
MCU - Multipoint Conference Unit
MD 5 - Message-Digest Algorithm
MD - Manufacture Discontinue
MDM - Media Device Manager
MEGACO - Media Gateway Control Protocol (H.248)
Mesh-BN - Meshed Bonding Network
MFC - Most Favored Customer
MFRP - Multimedia Function Resource Processor
MG - Media Gateway
MGC - Media Gateway Controller
MGCF - Media Gateway Control Function
MGCP - Media Gateway Control Protocol
MGW - Media Gateway
MIB - Management Information Base
MIP - Mobile IP
MIPS - Million Instructions Per Second
MM - Mobility Management
MME - Mobile Management Entity
MMS - Multimedia Messaging Service
MNP/LNP - Mobile / Local Number Portability
MPLS - Multi-Protocol Label Switching
MPoA - Multi-Protocol over ATM
MRFC - Multimedia Resource Function Controller
MRFP - Multimedia Resource Function Processor
MSC - Mobile Switching Center
MSCF - Messaging Service Control Function
MTP - Message Transfer Part
NA - North American
NAPT - Network Address Port Translation
NAS - Network Attached Storage, Not Access Stratum
NAT - Network Address Translation
NBAP - Node B Application Part
NEBS - Network Equipment Building System
NEDS - Network Equipment Development Standard
NFS - Network File System
NGN - Next Generation Network
NIC - Network Interface Card
NNI - Network-Network Interface
NRE - Non-recoverable Engineering
NS - Network Services
NSRP - Network Service-Ready Platform
NTP - Network Time Protocol
OAM - Operations, Administration & Maintenance
OC-3 - Optical Carrier Level 3 (155.5Mbps)
OC-12 - Optical Carrier Level 12 (622.1Mbps)
OC-48 - Optical Carrier Level 48 (2.488Gbps)
OC-192 - Optical Carrier Level 192 (9.953Gbps)
OC-768 - Optical Carrier Level 768 (39.81Gbps)
OEM - Original Equipment Manufacturer
OFDM - Orthogonal Frequency Division Multiplexing
OFDMA - Orthogonal Frequency Division Multiple Access
OFM - Outage Frequency Measurement
OM - Operational Measurement
OPEX - Operating Expense
OSA - Open Service Access
OSA-GW - Open Service Access - Gateway
OSA-SCS - Open Services Architecture Service Capability Server
OSI - Open Systems Interconnection
OSP - Open Settlement Protocol
OSPF - Open Shortest Path First
OSS - Operations Support System
OXC - Optical Cross Connect

P-CSCF - Proxy Call Session Control Function
P-MSC - Packet Mobile Switching Center
PBX - Private Branch Exchange
PCAP - Positioning Calculation Application Part
PCI - Peripheral Component Interconnect
PCR - Peak Cell Rate
PDCP - Packet Data Control Protocol
PDF - Policy Decision Function
PDG - Packet Data Gateway
PDSN - Packet Data Support Node
PEC - Product Engineering Code
PG-MSC - Packet Gateway Mobile Switching Center
PGW - Packet Gateway
PHP - PHP Hypertext Preprocessor embedded scripting language
PHY - Physical Layer
PI - Product Integrity
PICMG - PCI Industrial Computers Manufacturers Group
PKM - Privacy Key Management
PLOA - Protocol Layers Over ATM
PMC - PCI Mezzanine Card
PMIP - Proxy Mobile IP
POTS - Plain Old Telephone Service
PPC - PowerPC
PPP - Point-to-Point Protocol
PPTP - Point-to-Point Tunneling Protocol
PRI - Primary Rate Interface
PSF - Protocol-Specific Function
PSTN - Public Switched Telephone Network
PTM - Packet Telephony Manager
PTT - Push-to-Talk
PVC - Permanent Virtual Circuit
PVG - Packet Voice Gateway
QoE - Quality of Experience
QoS - Quality of Service
RFP - Request for Proposal
RFQ - Request for Quote
RIP - Routing Information Protocol
RLC - Radio Link Control
RLC/MAC - GPRS Radio Link Control / Medium Access Control
RNC - Radio Network Controller
RNSAP - Radio Network Subsystem Application Part
ROI - Return on Investment
RR - Radio Resource
RRC - Radio Resource Control
RTCP - Real-time Control Protocol
RTP - Real-time Transport Protocol
RTPC - Signaling Route Management Transfer Prohibited Control
S-CSCF - Serving Call Session Control Function
SABP - Service Area Broadcast Protocol
SAE - System Architecture Evolution
SAF - Service Availability Forum
SAN - Storage Area Network
SBC - Session Border Controller, Single Board Computer
SCCP - Signaling Connection Control Part
SCF - Switching Control Function
SCIM - Service Capability Interaction Manager
SCP - Service Control Point
SCR - Sustained Cell Rate
SCS - Service Capability Server
SCSI - Small Computer System Interface
SCTP - Stream Control Transmission Protocol
SDH - Synchronous Digital Hierarchy
SDHLR - Super Distributed Home Location Register
SDK - Software Development Kit
SDP - Session Description Protocol
SEG - Security Gateway
SFP - Small Form-factor Pluggable
SG - Signaling Gateway
SGF - Set Graphic Rendition
SGSN - Serving GPRS Support Node
SHA-1 - Secure Hash Algorithm-1
SIGTRAN - Signaling Transport
SIP - Session Initiation Protocol
SLF - Subscription Locator Function
SM - Session Management
SMLC - Serving Mobile Location Center
SMP - Symmetrical Multi-Processing
SMS - Short Messaging Service
SMSC - Short Message Service Center
SNA - Storage Network Architecture
SNC - Synchronous Network Clock
SNDCP - SubNetwork-Dependent Convergence Protocol
SNMP - Simple Network Management Protocol
SNTP - Simple Network Time Protocol
SONET - Synchronous Optical Network
SPARC - Scalable Processor Architecture
SPG - Signaling Processor Gateway
SRF - Specialized Resource Function
SRNC (UMB) - Session Reference Network Controller
SRNC (WCDMA) - Serving RNC
SRTP - Secure Real-Time Protocol
SS - Supplementary Services
SS7 - Signaling System 7
SSC1 - Seismic Server Cabinet 1
SSCF - Service Specific Coordination Function
SSCOP - Service Specific Connection Oriented Protocol
SSCS - Service Specific Convergence Sublayer
SSF - Service Switching Function
SSH - Secure Shell
SSP - Signaling Service Point
SSS - Signaling Software Subsystem
STC - Signaling Transport Converter
STM - Synchronous Transfer Mode
STP - Signaling Transfer Point
SUA - SCCP User Adaptation Layer
SVC - Switched Virtual Circuit
T1 - Digital Carrier Facility for Digital Signal Level 1
TAPA - Trillium Advanced Portability Architecture
TAS - Telephony Application Server
TC - Transmission Convergence Sublayer
TCAP - Transaction Capability Application Part
TCP - Transmission Control Protocol
TCP/IP - Transmission Control Protocol / Internet Protocol
TCO - Total Cost of Ownership
TDM - Time Division Multiplexing
TEM - Telecom Equipment Manufacturer
TFTP - Trivial File Transfer Protocol
THIG - Topology Hiding Internetwork Gateway
TNL - Transport Network Layer
TLS - Transport Layer Security
TRX - Transcoder
TTS - Text-To-Speech
TUCL - TCP / UDP Convergence Layer
TUP - Telephony User Part
UAS - Universal Audio Server
UBR - Unspecified Bit Rate
UDP - User Datagram Protocol
UE - User Equipment
UL - Underwriters Laboratory
UMA - Unlicensed Mobile Access
UMTS - Universal Mobile Telecommunications System
UNC - Universal Naming Convention
UNI - User-Network Interface
UP - User Plane
USP - Universal Signaling Point
UTRAN - UMTS Terrestrial Radio Access Network
UUI - User-to-User Indicator
V5.2 - V5.2 Interface Signaling
V5UA - V5.2-User Adaptation Layer
V-AAA - Visitor AAA
VBR - Variable Bit Rate
VC - Virtual Connection
VCC - Virtual Channel Connection
VCCI - Voluntary Control Council for Interference
VCI - Virtual Channel Identifier
VCL - Virtual Channel Links
VLAN - Virtual Local Area Network
VLR - Visiting Location Register
VNS - Voice Navigation System
VO - Validation Office
VoATM - Voice over ATM
VoD - Video on Demand
VoIP - Voice over Internet Protocol
VP - Virtual Path
VPI - Virtual Path Identifier
VPL - Virtual Path Links
VPN - Virtual Private Network
VRRP - Virtual Router Redundancy Protocol
VrTx - Virtual Real-Time Executive real-time operating system
VXML - Voice Extensible Markup Language
WAG - Wireless Access Gateway
WCDMA - Wideband WCDMA
WLAN - Wireless Local Area Network
WRR - Weighted Round Robin
WSF - Wireless Service Framework
X.25 - Packet switched data network protocol
XFS - X Font Server