Glossary

0-9

3rd Generation Partnership Project
4G (Fourth Generation Wireless)
5G (Fifth Generation Wireless)

A

AAA Server (authentication, authorization, and accounting)
Access Point Name (APN)
Access SBCs and Interconnect SBCs
Adaptive Multi-Rate (AMR)
Adaptive Multi-Rate Wideband (AMR-WB)
Advanced Intelligent Network (AIN)
Aggregate Maximum Bit Rate (AMBR)
Anonymous Call Rejection (ACR)
Answer-Seizure Ratio (ASR)
Application Delivery Controller (ADC)
Application Server
Artifical Intelligence (AI)
Asynchronous Transfer Mode (ATM)
Attribute Value Pair (AVP)
Audio Conferencing
Auto Attendant (AA)
Automatic Call Distributor (ACD)
Automatic Number Identification (ANI)
Automatic Speech Recognition (ASR)
Average Call Duration

B

Back-to-Back User Agent (B2BUA)
Basic Rate ISDN (BRI)
B Channel
Bearer Independent Call Control (BICC)
Bearer Protocol
Bearer Service (BS)
Big Data
Bit Rate
Border Gateway Protocol (BGP)
Breakout Gateway Control Function (BGCF)

C

Cable Entrance Facility
Call Session Control Function (CSCF)
Call Control
Call Forwarding
Call Processing Language (CPL)
Call Routing
CAMEL Application Part (CAP)
CAMEL Service Environment (CSE)
Carrier Access Billing System (CABS)
Carrier Ethernet
Cause Code Mappings
Central Automatic Message Accounting (CAMA)
Centralized Message Distribution System (CMDS)
Central Office (CO)
Centrex (Central Office Exchange Service)
Channel-Associated Signaling (CAS)
Channel Service Unit/Data Service Unit (CSU-DSU)
Charging Data Record (CDR)
Circuit Switched
Class 4 Switch
Clear Channel Signaling (CLEAR)
Cloud Service
Co-location
Committed Information Rate (CIR)
Common Carrier
Common Channel Signaling (CCS)
Competitive Access Provider (CAP)
Competitive Local Exchange Carrier (CLEC)
Congestion Control
Connected Home
Connectivity
Constrained Application Protocol (CoAP)
Control Plane
Conventional Signaling (CS)
Conversational User Interface
Core Network (CN)
Customer Access Line Charge (CALC)
Customer Billing Services System (CBSS)
Customer Premise Equipment (CPE)
Customized Application Mobile Enhanced Logic
Customized Applications for Mobile network Enhanced Logic (CAMEL)
Custom Local Area Signaling Services (CLASS)

D

Data Center
Data Communication Equipment
Data Terminal Equipment (DTE)
D Channel (Delta Channel)
Destination Point Code (DPC)
Diameter Edge Agent (DEA)
Diameter (Protocol)
Diameter Routing Agent
Differentiated Services Code Point (DSCP)
Digital Cross-Connect System (DCS)
Digital Loop Carrier (DLC)
Direct Inward Dialing/Direct Outward Dialing (DID/DOD)
Disk Operating System (DOS)
Distributed Denial of Service (DDoS)
Domain Name System (DNS)
Dual Homing
Dual Tone Multi-Frequency (DTMF)
Dynamic Host Configuration Protocol (DHCP)

E

E.164 Number Mapping (ENUM)
Echo Return Loss (ERL)
Enhanced Control, Orchestration, Management and Policy (ECOMP)
Enterprise Session Border Controller (eSBC)
E-UTRAN
Evolved Packet Core (EPC)
Explicit Congestion Notification (ECN)
Extended Superframe (ESF)
Extensible Authentication Protocol (EAP)
Extensible Markup Language (XML)
Exterior Gateway Routing Protocol (EGP)

F

FAX
Fax Over IP (FoIP)
Fax Server
Fiber Optic Communications
Fiber to the X (FttX)
Frequency Division Duplex (FDD)

G

Gateway
Gateway Mobile Switching Center (GMSC)
General Packet Radio Service (GPRS)
Generic User Profile (GUP)
Gigabit Ethernet (GbE)
Global System for Mobile Communications (GSM)
GPRS Tunneling Protocol (GTP)
Ground Start (GS) Signaling
Ground-Start Signaling

H

H.323
Half-Duplex (HDX)
HD Voice
High-availability Seamless Redundancy (HSR)
High-Bit Rate Digital Subscriber Line (HDSL)
High Speed Packet Access (HSPA)
High Speed Serial Interface (HSSI)
Home Location Register (HLR)
Home Public Land Mobile Network (HPLMN)
Home Public Mobile Network (HPMN)
Home Subscriber Server (HSS)
Hypertext Transfer Protocol (HTTP)

I

IMS Authentication and Key Agreement (IMS-AKA)
IMS Charging ID
IMS Communication Service Identifier (ICSI)
IMS Credentials
IM Services Identity Module (ISIM)
Incumbent Local Exchange Carrier (ILEC)
Independent Telephone Company
Integrated Circuit Card Identifier (ICCID)
Integrated Digital Loop Carrier (IDLC)
Integrated Marketing Communications (IMC)
Integrated Services Digital Network (ISDN)
Intelligent Network (IN)
Interactive Voice Response (IVR)
Interconnection Border Control Function (IBCF)
Interconnection Facility
Interconnection Point (POI)
Interconnect Session Border Controller (I-SBC)
Interexchange Carrier (IXC)
Inter-IMS Network to Network Interface (II-NNI)
International Mobile Equipment Identity (IMEI)
International Mobile Subscriber Identity (IMSI)
International Switching Center (ISC)
Internet Engineering Task Force (IETF)
Internet of Things (IOT)
Internet Protocol (IP)
Internet Protocol version 4 (IPV4)
Internet Protocol version 6 (IPV6)
Internet Service Provider (ISP)
Inter Operator Identifier (IOI)
Interrogating Call Session Control Function (I-CSCF)
Interworking Function (IWF)
Inverse Multiplexing (IMUX)
IP Connectivity Access Network (IP-CAN)
IP Multimedia Services Identity Module (ISIM)
IP Multimedia Subsystem (IMS)
IP Packet Exchange (IPX)
IP Security (IPSec)

J

Java
JavaScript
JavaScript Object Notation (JSON)
Java Telephony Application Programming Interface (JTAPI)

K

Kubernetes (K8s)

L

Load Balancer (LB)
Local Access and Transport Area (LATA)
Local Area Network (LAN)
Local Breakout (LBO)
Local Exchange Carrier (LEC)
Local Loop
Long Term Evolution (LTE)

M

Machine Learning
Machine to Machine (M2M)
Maximum Transmission Unit (MTU)
Media Gateway
Media Gateway Control Function (MGCF)
Media Gateway Control Protocol (MGCP)
Media Resource Broker (MRB)
Media Server
Medium Access Control (MAC)
Mobile Application Part (MAP)
Mobile Broadband
Mobile Country Code (MCC)
Mobile Equipment (ME)
Mobile Network (MN)
Mobile Network Operator (MNO)
Mobile Originating (MO)
Mobile Station International ISDN Number
Mobile Station International Subscriber Directory Number (MSISDN)
Mobile Station (MS)
Mobile Terminating
MQTT Protocol
Mulitplexer (MUX)
Multi-Line Hunting Group (MLHG)
Multimedia Broadcast/Multicast Service (MBMS)
Multimedia Messaging Service (MMS)
Multimedia Resource Function Controller (MRFC)
Multimedia Resource Function (MRF)
Multimedia Resource Function Processor (MRFP)
Multiple Input Multiple Output (MIMO)
Multiple Input Single Output (MISO)

N

Network
Network Access Identifier (NAI)
Network Address Port Translation (NAPT)
Network Address Translation (NAT)
Network Attached Storage (NAS)
Network Effectiveness Ratio (NER)
Network Functions Virtualization (NFV)
Network Operations Center (NOC)
Network Operators
Network to Network Interface (NNI)

O

On-Hook
Online Charging System (OCS)
Open Compute Project (OCP)
Open Database Connectivity (ODBC)
Open Network Architecture (ONA)
Open Network Automation Platform (ONAP)
Open Services Architecture (OSA)
OpenStack
Orchestration Platform
Order and Service Management (OSM)
Original Equipment Manufacturer (OEM)
Outside Plant

P

Packet Data Network (PDN)
Packet Data Protocol (PDP)
Packet Switched/Packet Switching (PS)
Packet Temporary Mobile Subscriber Identity (P-TMSI)
Policy and Charging Control (PCC)
Private Branch Exchange (PBX)
Private Mobile Network (PMN)
Proxy Call Session Control Function (P-CSCF)
Public Globally Routable User Agent URI (P-GRUU)
Public Land Mobile Network (PLMN)
Public Service Identity (PSI)
Public Switched Telephone Network (PSTN)

Q

Quality of Service (QoS)

R

Radio Access Network (RAN)
Radio Access Technology (RAT)
Real-Time Communications (RTC)
Real-time Transport Protocol (RTP)
Real-Time Transport Protocol (RTP/RTCP)
Redundancy
Remote Authentication Dial-In User Service (RADIUS)
Request for Comment (RFC)
Ring-Down
Ringtone
Roaming
Robbed Bit Signaling (In-band Signaling)
Router

S

Secondary Directory Number (SDN)
Secure Real-time Transport Protocol (SRTP)
Selective Forwarding Unit (SFU)
Self Optimizing Network (SON)
Service Capability Interaction Manager (SCIM)
Service Control Point (SCP)
Service Platform Trigger Points (STP)
Service Switching Function (SSF)
Service Switching Point (SSP)
Session Border Controller (SBC)
Session Description Protocol (SDP)
Session Initiation Protocol (SIP)
Session Initiation Protocol with encapsulated ISUP (SIP-I)
Short Message Service (SMS)
Signaling Connection Control Part (SCCP)
Signaling Gateway
Signaling Protocol
Signaling System 7 (SS7)
Signal Transfer Points (STP)
Signal Transport (SIGTRAN)
Signal Unit (SU)
SIP Application Server
SIP Client
SIP Trunk
Smart Home
Softswitch
Software as a Service (SaaS)
Software Defined Networking (SD-WAN)
Stream Control Transmission Protocol (SCTP)

T

T.38 Fax
Telecommunication
Telecommunication Device for the Deaf (TDD)
Telecommunications Relay Service (TRS)
Telecommunications Service Provider (TSP)
Telephony
Telephony Application Server (TAS)
Temporary Globally Routable User Agent URI (T-GRUU)
Temporary Mobile Subscriber Identity (TMSI)
Transmission Control Protocol (TCP)
Transport Layer Security (TLS)
Transrating
Trunk Group (TG)
Trunks

U

Unified Communications as a Service (UCaaS)
Unified Communications (UC)
Unified Messaging System (UMS)
Uniform Resource Identifier (URI)
Uniform Resource Locator (URL)
Universal Call Distributor (UCD)
Universal Mobile Telecommunications System (UMTS)
Universal Service
Universal Subscriber Identity Module (USIM)
Universal Terrestrial Radio Access Network (UTRAN)
User Agent (UA)
User Datagram Protocol (UDP)
User Equipment (UE)
User Plane

V

Value Added Network (VAN)
Value Added Reseller (VAR)
Value Added Service Provider (VASP)
Value Added Service (VAS)
Video over LTE (ViLTE)
Virtual Network Function (VNF)
Virtualization
Virtual Machine (VM)
Virtual Private Network (VPN)
Visited Public Mobile Network (VPMN)
Visitor Location Register (VLR)
Visual Interactive Voice Response (VIVR)
Visual Voicemail (VV)
Voicemail System (VMS)
Voice Over IP (VoIP)
Voice over LTE (VoLTE)
Voice over WiFi (VoWiFi)

W

Wearables
WebRTC
Wholesale Carrier
Wide Area Network (WAN)
Wideband Modem
Wireless Access Mode (WAM)
Wireless Mobility Management (WMM)

X

xDSL
XML Configuration Access Protocol (XCAP)