Telecom Abbreviations & Acronyms

Complete glossary of telecommunications terminology. Search 218+ industry abbreviations across voice, mobile, network, messaging, business, and regulatory domains.

218
Terms
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Showing 218 of 218 abbreviations
2G
mobile
Second Generation Mobile
Digital cellular standard (GSM/CDMA) supporting voice and basic data services.
3G
mobile
Third Generation Mobile
Mobile standard (UMTS/WCDMA) enabling mobile broadband data up to 42 Mbps.
3GPP
regulatory
3rd Generation Partnership Project
Global standards body developing specifications for mobile telecommunications (3G, 4G, 5G).
4G
mobile
Fourth Generation Mobile
LTE-based mobile broadband standard with speeds up to 1 Gbps and all-IP architecture.
5G
mobile
Fifth Generation Mobile
Latest mobile standard (NR) offering ultra-low latency, massive IoT, and multi-Gbps speeds.
A2P
messaging
Application to Person
Messaging from a software application to a mobile user (e.g., OTP codes, alerts, marketing).
ACD
voice
Average Call Duration
Mean length of completed calls, a key KPI for voice quality and billing analytics.
ACL
network
Access Control List
Set of rules filtering network traffic based on IP address, port, or protocol.
ACMA
regulatory
Australian Communications and Media Authority
Australia's regulatory body for broadcasting, the internet, radiocommunications, and telecommunications.
ACR
voice
Answer to Call Ratio
Percentage of calls answered out of total attempts, measuring network reachability.
AEC
voice
Acoustic Echo Cancellation
Technology removing echo from voice calls caused by acoustic feedback between speaker and microphone.
ANI
voice
Automatic Number Identification
Identifies the calling party's phone number, used for billing and caller ID.
ANSI
regulatory
American National Standards Institute
US organization coordinating voluntary standards development across industries including telecom.
API
business
Application Programming Interface
Set of defined methods allowing software applications to communicate and exchange data.
APN
mobile
Access Point Name
Gateway identifier between a mobile network and the internet or private data network.
ARP
network
Address Resolution Protocol
Maps IP addresses to MAC addresses on a local area network segment.
ARPU
business
Average Revenue Per User
Key financial metric calculating average monthly revenue generated per subscriber.
ASR
voice
Answer Seizure Ratio
Percentage of successfully answered calls out of total seizures, a critical voice KPI.
B2B
business
Business to Business
Commercial transactions and services between two businesses, as opposed to consumer-facing.
BEREC
regulatory
Body of European Regulators for Electronic Communications
EU advisory body promoting consistent application of telecom regulations across Europe.
BGP
network
Border Gateway Protocol
Core internet routing protocol exchanging routing information between autonomous systems.
BSC
mobile
Base Station Controller
Controls multiple BTS units in a GSM network, handling handovers and radio resource management.
BSS
business
Business Support System
Software systems handling customer-facing operations: billing, CRM, order management.
BTS
mobile
Base Transceiver Station
Radio equipment at a cell site that communicates directly with mobile devices.
BYE
voice
Session Termination (SIP)
SIP method used to terminate an established multimedia session between endpoints.
BYOC
business
Bring Your Own Carrier
Model allowing businesses to use their own telecom carrier with a CPaaS or UCaaS platform.
CA
mobile
Carrier Aggregation
LTE-Advanced feature combining multiple frequency bands to increase data throughput.
CALEA
regulatory
Communications Assistance for Law Enforcement Act
US law requiring telecom carriers to enable lawful interception of communications.
CAPEX
business
Capital Expenditure
Upfront investment in physical assets like network infrastructure, towers, and equipment.
CCaaS
business
Contact Center as a Service
Cloud-based contact center platform providing omnichannel customer interaction tools.
CDMA
mobile
Code Division Multiple Access
Radio access technology using spread spectrum for multiple simultaneous users on the same frequency.
CDN
network
Content Delivery Network
Distributed network of servers delivering content from geographically close locations for faster loading.
CDR
business
Call Detail Record
Detailed log of a call including origin, destination, duration, timestamps, and billing data.
CEPT
regulatory
European Conference of Postal and Telecommunications Administrations
European body coordinating postal and telecommunications policies and spectrum management.
CIDR
network
Classless Inter-Domain Routing
IP addressing scheme that replaces classful addressing with flexible prefix-length notation.
CLEC
business
Competitive Local Exchange Carrier
Telecom operator competing with the incumbent carrier (ILEC) for local telephone services.
CLI
voice
Calling Line Identification
Presentation of the caller's number to the called party. Also known as Caller ID.
CNAM
messaging
Caller Name Delivery
Service that provides the caller's name along with the phone number for caller identification.
CODEC
voice
Coder-Decoder
Algorithm that compresses and decompresses voice/audio data for transmission (e.g., G.711, G.729).
CPaaS
business
Communications Platform as a Service
Cloud platform providing APIs for embedding voice, messaging, and video into applications.
CPE
business
Customer Premises Equipment
Telecom hardware located at the subscriber's site (e.g., routers, modems, IP phones).
CPM
messaging
Converged IP Messaging
Next-gen messaging platform combining SMS, MMS, and chat into a unified IP-based service.
CPS
voice
Calls Per Second
Measure of traffic throughput capacity on a switch or SBC, critical for load testing.
CRM
business
Customer Relationship Management
Software for managing customer interactions, sales, and support across the subscriber lifecycle.
CSFB
mobile
Circuit-Switched Fallback
Mechanism for LTE devices to fall back to 2G/3G for voice calls when VoLTE is unavailable.
CSP
messaging
Communication Service Provider
Company offering communication services including voice, data, and messaging to end users.
D2D
mobile
Device to Device
Direct communication between nearby mobile devices without routing through a base station.
DHCP
network
Dynamic Host Configuration Protocol
Automatically assigns IP addresses and network configuration to devices on a network.
DID
voice
Direct Inward Dialing
Allows external callers to reach a specific extension without going through an operator.
DLR
messaging
Delivery Report
Notification confirming whether an SMS/MMS was successfully delivered to the recipient's handset.
DNIS
business
Dialed Number Identification Service
Service identifying which number was dialed, used for call routing in multi-DID setups.
DNS
network
Domain Name System
Hierarchical naming system translating human-readable domain names into IP addresses.
DSCP
network
Differentiated Services Code Point
Replacement for ToS field, providing fine-grained QoS classification in IP headers.
DSP
voice
Digital Signal Processor
Specialized processor handling real-time voice compression, echo cancellation, and tone detection.
DSS
regulatory
Dynamic Spectrum Sharing
Technology allowing 4G LTE and 5G NR to share the same frequency band simultaneously.
DTMF
voice
Dual Tone Multi Frequency
Signaling tones generated by telephone keypads used for IVR navigation and dialing.
DWDM
network
Dense Wavelength Division Multiplexing
Fiber optic technology transmitting multiple signals on different wavelengths simultaneously.
E.164
regulatory
ITU-T Numbering Standard
International standard defining the format for telephone numbers (country code + subscriber number).
E1
voice
E-Carrier Level 1
European standard digital trunk carrying 30 voice channels at 2.048 Mbps.
EDGE
mobile
Enhanced Data rates for GSM Evolution
Upgrade to GPRS providing faster data speeds (up to 384 kbps) on 2G networks.
eNB
mobile
Evolved Node B
4G LTE base station that connects mobile devices to the core network via the S1 interface.
ENUM
business
E.164 Number Mapping
DNS-based system translating telephone numbers into internet addresses (URIs) for VoIP routing.
EPC
mobile
Evolved Packet Core
Core network architecture of 4G LTE providing all-IP connectivity and mobility management.
eSIM
mobile
Embedded SIM
SIM chip soldered into a device allowing remote provisioning of carrier profiles.
ESME
messaging
External Short Messaging Entity
Application or system connecting to an SMSC via SMPP to send and receive SMS messages.
ETSI
regulatory
European Telecommunications Standards Institute
European standards organization for ICT including telecom, broadcasting, and smart technologies.
FAS
voice
False Answer Supervision
Fraudulent practice where a call appears answered before the called party picks up.
FCC
regulatory
Federal Communications Commission
US government agency regulating interstate and international communications by radio, TV, wire, and satellite.
FTP
network
File Transfer Protocol
Standard protocol for transferring files between client and server over TCP/IP networks.
FTTB
network
Fiber To The Building
Fiber optic deployment extending to the building entrance with copper to individual units.
FTTC
network
Fiber To The Curb
Fiber optic extending to a street-level cabinet, with copper for the last few hundred meters.
FTTH
network
Fiber To The Home
Fiber optic connectivity delivered directly to the subscriber's home or premises.
FTTP
network
Fiber To The Premises
General term for fiber optic delivery to any type of end-user location.
FXO
voice
Foreign Exchange Office
Port or interface connecting to a telephone line (receives dial tone from the CO).
FXS
voice
Foreign Exchange Station
Port or interface providing dial tone and ring voltage to an analog telephone or fax.
G.711
voice
ITU-T Audio Codec Standard
Uncompressed PCM codec at 64 kbps, the default codec for PSTN-quality voice.
G.729
voice
ITU-T Compressed Audio Codec
Low-bandwidth codec at 8 kbps, widely used in VoIP for bandwidth-constrained links.
GDPR
regulatory
General Data Protection Regulation
EU regulation on data protection and privacy impacting telecom customer data handling.
gNB
mobile
Next Generation Node B
5G NR base station handling radio access for 5G standalone and non-standalone modes.
GPRS
mobile
General Packet Radio Service
Packet-switched data service on 2G networks providing always-on internet connectivity.
GRE
network
Generic Routing Encapsulation
Tunneling protocol encapsulating packets within IP for creating virtual point-to-point links.
GSM
mobile
Global System for Mobile Communications
Most widely used 2G digital cellular standard, developed by ETSI, operating globally.
GSMA
regulatory
GSM Association
Global industry body representing mobile operators and ecosystem companies worldwide.
HLR
mobile
Home Location Register
Central database in GSM containing subscriber profile data and current network location.
HSPA
mobile
High Speed Packet Access
3G upgrade (HSDPA+HSUPA) delivering faster data rates up to 42 Mbps.
HTTP
network
Hypertext Transfer Protocol
Application-layer protocol for transmitting web pages and data over the internet.
ICMP
network
Internet Control Message Protocol
Network protocol for error reporting and diagnostics (e.g., ping, traceroute).
IEEE
regulatory
Institute of Electrical and Electronics Engineers
Professional association developing standards for electronics, computing, and telecommunications (e.g., Wi-Fi).
IETF
regulatory
Internet Engineering Task Force
Open standards organization developing internet protocols and standards via RFCs.
ILEC
business
Incumbent Local Exchange Carrier
The original, legacy telephone company serving a geographic area before deregulation.
IMEI
mobile
International Mobile Equipment Identity
Unique 15-digit number identifying a mobile device, used for theft prevention and network control.
IMS
regulatory
IP Multimedia Subsystem
Architectural framework for delivering IP-based multimedia services including VoLTE and RCS.
IMSI
mobile
International Mobile Subscriber Identity
Unique identifier stored on SIM card used to identify a subscriber on any GSM/LTE network.
INVITE
voice
Session Initiation (SIP)
SIP method used to initiate a call or session between two endpoints.
IoT
mobile
Internet of Things
Network of connected physical devices (sensors, vehicles, appliances) communicating via cellular or other networks.
IP
network
Internet Protocol
Core network protocol providing addressing and routing of packets across interconnected networks.
IPTV
business
Internet Protocol Television
Television content delivered over IP networks rather than traditional broadcast or cable.
IPv4
network
Internet Protocol Version 4
Fourth version of IP using 32-bit addresses, supporting approximately 4.3 billion unique addresses.
IPv6
network
Internet Protocol Version 6
Latest IP version using 128-bit addresses, providing virtually unlimited address space.
IPX
business
IP Packet Exchange
Carrier-grade interconnect for exchanging VoIP, data, and messaging between international operators.
ISP
business
Internet Service Provider
Company providing internet access to consumers and businesses via various technologies.
ITSP
business
Internet Telephony Service Provider
Company providing VoIP-based telephone services to businesses and consumers.
ITU
regulatory
International Telecommunication Union
UN agency coordinating global telecom standards, spectrum allocation, and satellite orbits.
ITU-T
regulatory
ITU Telecommunication Standardization Sector
Branch of ITU responsible for defining international telecommunications standards and recommendations.
IVR
voice
Interactive Voice Response
Automated telephony system that interacts with callers via voice menus and DTMF input.
IX
business
Internet Exchange
Physical facility where ISPs and networks peer to exchange traffic directly.
KPI
business
Key Performance Indicator
Measurable value used to evaluate operational success (e.g., ASR, NER, MOS in telecom).
LACP
network
Link Aggregation Control Protocol
IEEE protocol bundling multiple physical links into a single logical link for redundancy and bandwidth.
LAN
network
Local Area Network
Computer network connecting devices within a limited area such as an office or building.
LCR
voice
Least Cost Routing
Algorithm that selects the cheapest available carrier route for outbound voice traffic.
LEA
regulatory
Law Enforcement Agency
Government body authorized to request lawful intercept of communications from telecom operators.
LI
regulatory
Lawful Intercept
Legal capability for carriers to provide call/data interception to authorized law enforcement.
LLDP
network
Link Layer Discovery Protocol
Vendor-neutral protocol for network devices to advertise their identity and capabilities to neighbors.
LNP
business
Local Number Portability
Ability for subscribers to keep their phone number when switching carriers.
LTE
mobile
Long Term Evolution
4G radio access technology providing high-speed mobile broadband with flat all-IP architecture.
MAP
messaging
Mobile Application Part
SS7 protocol supporting mobile services including SMS routing, roaming, and handover.
MCC
mobile
Mobile Country Code
Three-digit code identifying a country in mobile networks (e.g., 310 = USA, 234 = UK).
MEC
mobile
Multi-access Edge Computing
Computing at the network edge to reduce latency for applications like autonomous vehicles and AR.
MIMO
mobile
Multiple Input Multiple Output
Antenna technology using multiple transmitters and receivers to increase data throughput.
MMS
messaging
Multimedia Messaging Service
Extension of SMS supporting images, audio, video, and rich content in mobile messages.
MNC
mobile
Mobile Network Code
Two or three-digit code identifying a specific mobile operator within a country.
MNO
business
Mobile Network Operator
Carrier that owns and operates its mobile network infrastructure and spectrum licenses.
MNP
business
Mobile Number Portability
Service allowing mobile subscribers to retain their number when changing operators.
MO
messaging
Mobile Originated
Message or call initiated by the mobile subscriber (sent from the handset).
MOS
voice
Mean Opinion Score
Numeric quality rating of voice calls (1-5 scale) based on listener perception or algorithm.
MPLS
network
Multi-Protocol Label Switching
High-performance routing technique directing data via labels rather than IP lookups for faster forwarding.
MSISDN
mobile
Mobile Station International Subscriber Directory Number
The full international phone number used to identify a mobile subscriber (e.g., +44...).
MT
messaging
Mobile Terminated
Message or call received by the mobile subscriber (delivered to the handset).
MTU
network
Maximum Transmission Unit
Largest packet size (in bytes) that can be sent over a network link without fragmentation.
MVNE
business
Mobile Virtual Network Enabler
Company providing infrastructure and services enabling MVNOs to operate without building a network.
MVNO
business
Mobile Virtual Network Operator
Carrier offering mobile services using another operator's network infrastructure under a wholesale agreement.
NANP
regulatory
North American Numbering Plan
Telephone numbering plan covering the US, Canada, Caribbean, and Pacific territories with country code +1.
NAT
network
Network Address Translation
Remaps private IP addresses to a public IP address, enabling internet access for internal hosts.
NB-IoT
mobile
Narrowband IoT
Low-power wide-area network technology for IoT devices on existing LTE infrastructure.
NER
voice
Network Effectiveness Ratio
Measures network success rate excluding user-related failures like busy or no answer.
NFV
network
Network Functions Virtualization
Virtualizing network services (firewalls, load balancers) on commodity hardware instead of dedicated appliances.
NNI
business
Network-to-Network Interface
Interconnection point between two carrier networks for exchanging traffic.
NOC
business
Network Operations Center
Centralized facility for monitoring, managing, and maintaining network performance 24/7.
NR
mobile
New Radio (5G)
5G radio access technology defined by 3GPP supporting sub-6 GHz and mmWave bands.
NSA
mobile
Non-Standalone (5G)
5G deployment mode using 5G NR radio with existing 4G LTE core infrastructure.
NTP
network
Network Time Protocol
Protocol for clock synchronization between computer systems over packet-switched networks.
OFCOM
regulatory
Office of Communications
UK regulatory authority for broadcasting, telecommunications, and postal services.
OPEX
business
Operating Expenditure
Ongoing costs for running a business, including salaries, maintenance, and service fees.
OSI
network
Open Systems Interconnection
Seven-layer reference model describing how network protocols interact from physical to application layer.
OSPF
network
Open Shortest Path First
Link-state interior routing protocol using Dijkstra's algorithm for optimal path calculation.
OSS
business
Operations Support System
Software managing network operations: provisioning, fault management, performance monitoring.
OTA
mobile
Over The Air
Wireless delivery of software updates, configuration, or SIM profiles to mobile devices.
OTP
messaging
One Time Password
Single-use verification code sent via SMS or voice for two-factor authentication.
OTT
business
Over The Top
Services delivered over the internet bypassing traditional distribution (e.g., WhatsApp, Netflix).
P2A
messaging
Person to Application
Message sent by a mobile user to an application or short code service.
P2P
messaging
Person to Person
Direct messaging between two mobile subscribers, the traditional SMS/MMS use case.
PBX
voice
Private Branch Exchange
Private telephone switching system within an organization connecting internal extensions to PSTN.
PDD
voice
Post Dial Delay
Time between sending the last dialed digit and receiving a ringback or response.
PESQ
voice
Perceptual Evaluation of Speech Quality
ITU standard (P.862) for automated measurement of voice quality on telephone networks.
PLMN
mobile
Public Land Mobile Network
A complete mobile network operated by a single carrier, identified by MCC+MNC combination.
PoP
network
Point of Presence
Physical location where a carrier or ISP provides network access and peering.
PRI
business
Primary Rate Interface
ISDN access providing 23 (T1) or 30 (E1) B-channels for digital voice trunking.
PSTN
voice
Public Switched Telephone Network
Traditional circuit-switched global telephone network used for analog voice communication.
QCI
mobile
QoS Class Identifier
Value defining the QoS handling for LTE bearers (e.g., priority, delay, error rate).
QoE
network
Quality of Experience
Subjective measure of end-user satisfaction with a service, beyond technical QoS metrics.
QoS
voice
Quality of Service
Set of technologies and policies ensuring reliable network performance for voice and data traffic.
RADIUS
network
Remote Authentication Dial-In User Service
Protocol for centralized authentication, authorization, and accounting for network access.
RAN
mobile
Radio Access Network
Part of the mobile network connecting user devices to the core via base stations.
RCS
messaging
Rich Communication Services
Enhanced messaging protocol (successor to SMS) supporting rich media, typing indicators, and read receipts.
RFC
regulatory
Request for Comments
IETF publication documenting internet standards, protocols, and best practices.
ROI
business
Return on Investment
Financial metric measuring the profitability of telecom infrastructure and service investments.
RSSI
mobile
Received Signal Strength Indicator
Measurement of radio signal power received by a mobile device, indicating coverage quality.
RTCP
voice
RTP Control Protocol
Companion protocol to RTP providing quality statistics and synchronization for media streams.
RTP
voice
Real-time Transport Protocol
Protocol for delivering audio and video over IP networks with timing and sequence control.
SA
mobile
Standalone (5G)
5G deployment mode using a 5G core network independently, without 4G infrastructure.
SBC
voice
Session Border Controller
Network device that controls signaling and media at the border of VoIP networks for security and interop.
SDH
network
Synchronous Digital Hierarchy
International standard (equivalent to SONET) for high-speed data transmission over fiber optic.
SDN
network
Software Defined Networking
Approach decoupling the control plane from the data plane for centralized, programmable network management.
SDP
voice
Session Description Protocol
Describes multimedia session parameters (codecs, addresses, ports) in SIP and RTP sessions.
SFP
network
Small Form-factor Pluggable
Compact optical transceiver module used in networking switches and routers for fiber connections.
SHAKEN
messaging
Signature-based Handling of Asserted information using toKENs
Implementation of STIR framework for caller ID authentication across carrier networks.
SIGTRAN
messaging
Signaling Transport
IETF protocols transporting SS7 signaling over IP networks, bridging legacy and modern telecom.
SIM
mobile
Subscriber Identity Module
Smart card storing subscriber identity (IMSI), authentication keys, and carrier configuration.
SIP
voice
Session Initiation Protocol
Signaling protocol for initiating, maintaining, and terminating real-time voice/video sessions.
SLA
business
Service Level Agreement
Contract defining expected performance metrics like uptime, latency, and response times.
SMPP
messaging
Short Message Peer-to-Peer Protocol
Industry-standard protocol for exchanging SMS between SMSC and external short message entities.
SMS
mobile
Short Message Service
Text messaging service allowing up to 160-character messages over cellular signaling channels.
SMSC
messaging
Short Message Service Center
Network element that stores, routes, and forwards SMS messages between senders and recipients.
SNMP
network
Simple Network Management Protocol
Protocol for monitoring and managing network devices such as routers, switches, and servers.
SONET
network
Synchronous Optical Networking
Standardized multiplexing protocol for transferring digital data over optical fiber.
SRTP
voice
Secure Real-time Transport Protocol
Encrypted version of RTP providing confidentiality and authentication for media streams.
SS7
messaging
Signaling System 7
Telecom signaling protocol suite managing call setup, routing, SMS delivery, and number portability.
SSL
network
Secure Sockets Layer
Cryptographic protocol (predecessor to TLS) providing encrypted communication over networks.
STIR
messaging
Secure Telephony Identity Revisited
Framework for authenticating caller identity to combat robocalls and spoofing (used with SHAKEN).
T.38
voice
Fax over IP Protocol
ITU standard for sending fax transmissions over IP networks in real time.
T1
voice
T-Carrier Level 1
North American digital trunk carrying 24 voice channels at 1.544 Mbps.
TCO
business
Total Cost of Ownership
Complete cost assessment including purchase, deployment, operation, and maintenance over asset lifetime.
TCP
network
Transmission Control Protocol
Reliable, connection-oriented transport protocol ensuring ordered delivery of data packets.
TDM
voice
Time Division Multiplexing
Technique dividing a single communication channel into time slots for multiple simultaneous calls.
TLS
network
Transport Layer Security
Cryptographic protocol securing communications over networks, successor to SSL.
ToS
network
Type of Service
IP header field used to specify priority and QoS handling for packets.
TRAI
regulatory
Telecom Regulatory Authority of India
Indian government body regulating the telecommunications sector, tariffs, and service quality.
UCaaS
business
Unified Communications as a Service
Cloud-delivered platform combining voice, video, messaging, and collaboration tools.
UDH
messaging
User Data Header
Header in SMS messages enabling concatenation, port addressing, and special message types.
UDP
network
User Datagram Protocol
Connectionless transport protocol offering fast, low-overhead data delivery without guaranteed order.
UMTS
mobile
Universal Mobile Telecommunications System
3G mobile standard based on WCDMA radio access, part of the 3GPP family.
UNI
business
User-to-Network Interface
Demarcation point between a subscriber's equipment and the carrier's network.
URI
voice
Uniform Resource Identifier
String identifying a SIP user or resource (e.g., sip:user@domain.com).
USO
regulatory
Universal Service Obligation
Regulatory mandate requiring operators to provide basic telecom services to all citizens.
USSD
mobile
Unstructured Supplementary Service Data
Session-based GSM protocol for real-time interactive services (e.g., balance checks, menus).
VLAN
network
Virtual Local Area Network
Logical network segmentation within a physical network, isolating traffic for security and management.
VLR
mobile
Visitor Location Register
Temporary database storing information about roaming subscribers currently in the area.
VoIP
voice
Voice over Internet Protocol
Technology for delivering voice communications over IP-based networks instead of PSTN.
VoLTE
voice
Voice over LTE
Standard for high-quality voice calls directly over 4G LTE data networks using IMS.
VPN
network
Virtual Private Network
Encrypted tunnel over a public network providing secure, private connectivity between sites or users.
WAN
network
Wide Area Network
Network spanning a large geographic area connecting multiple LANs, often using leased lines or MPLS.
WAP
messaging
Wireless Application Protocol
Early standard for accessing internet content on mobile phones, predecessor to modern mobile web.
WCAG
regulatory
Web Content Accessibility Guidelines
W3C standards for making web content accessible, increasingly applied to telecom portals and apps.
WCDMA
mobile
Wideband Code Division Multiple Access
Radio access technology used in UMTS/3G networks offering higher bandwidth than CDMA2000.
WebRTC
voice
Web Real-Time Communication
Browser-based API enabling real-time voice, video, and data communication without plugins.
WLAN
network
Wireless Local Area Network
LAN using Wi-Fi radio technology for wireless device connectivity within a limited area.
WLR
business
Wholesale Line Rental
Regulated product allowing operators to resell the incumbent's copper line access to end customers.
XaaS
business
Anything as a Service
General term for the broad category of cloud-delivered services (SaaS, PaaS, IaaS, etc.).