In the telecommunications industry, traditional wireline services remain fundamental to global communication networks. Understanding the terminology related to these services is essential for professionals in this field. From infrastructure components to network protocols, a thorough grasp of these acronyms can significantly enhance your ability to manage and optimize telecom services.
This resource is designed specifically for IT, finance, and telecommunications professionals working within large enterprises. Our goal is to provide you with a useful guide to the most used acronyms in traditional telecom wireline services, ensuring you have quick and easy access to the terms you encounter daily. Additional resources are available via the Gartner glossary.
This Resource Covers
Each acronym is accompanied by its full form and a brief description to provide context and enhance your understanding.
Traditional Telecom Wireline Services Acronyms
AAL – ATM Adaptation Layer
ALC – Automatic Level Control
AMI – Alternate Mark Inversion
AN – Access Network
ANSI – American National Standards Institute
AP – Access Point
APM – Advanced Power Management
ARP – Address Resolution Protocol
ASE – Amplified Spontaneous Emission
ASR – Automatic Speech Recognition
ASP – Application Service Provider
ATM – Asynchronous Transfer Mode
BERT – Bit Error Rate Test
BER – Bit Error Rate
BGP – Border Gateway Protocol
BOM – Bill of Materials
BPL – Broadband over Power Lines
BRI – Basic Rate Interface
BSS – Base Station Subsystem
BSS – Business Support System
CATV – Community Antenna Television
CBR – Constant Bit Rate
CCF – Customer Care Framework
CCS – Common Channel Signaling
CFR – Code of Federal Regulations
CIR – Committed Information Rate
CLEC – Competitive Local Exchange Carrier
CLI – Command Line Interface
CLS – Central Link Switch
CM – Configuration Management
CMDA – Code Division Multiple Access
CMTS – Cable Modem Termination System
CPE – Customer Premises Equipment
CSP – Communications Service Provider
CSU/DSU – Channel Service Unit/Data Service Unit
CW – Continuous Wave
CWDM – Coarse Wavelength Division Multiplexing
DAC – Digital to Analog Converter
DACS – Digital Access and Cross-Connect System
DDF – Digital Distribution Frame
DECT – Digital Enhanced Cordless Telecommunications
DHCP – Dynamic Host Configuration Protocol
DNS – Domain Name System
DOCSIS – Data Over Cable Service Interface Specification
DSL – Digital Subscriber Line
DSLAM – Digital Subscriber Line Access Multiplexer
DS3 – Digital Signal 3
DWDM – Dense Wavelength Division Multiplexing
E1 – European Basic Rate (2.048 Mbps)
EAP – Extensible Authentication Protocol
EIGRP – Enhanced Interior Gateway Routing Protocol
ELFEXT – Equal Level Far End Cross-Talk
EON – Elastic Optical Network
EPON – Ethernet Passive Optical Network
ESN – Electronic Serial Number
FAS – Frame Alignment Signal
FDDI – Fiber Distributed Data Interface
FDM – Frequency Division Multiplexing
FEC – Forward Error Correction
FEXT – Far End Crosstalk
FMC – Fixed-Mobile Convergence
FOTS – Fiber Optic Transmission System
FTP – File Transfer Protocol
FTTC – Fiber to the Curb
FTTH – Fiber to the Home
FTTN – Fiber to the Node
FTTP – Fiber to the Premises
FWA – Fixed Wireless Access
G.703 – ITU-T standard for transmitting voice and data
G.704 – ITU-T standard for framing signals
G.705 – ITU-T standard for functions and interworking
G.706 – ITU-T standard for frame alignment
G.707 – ITU-T standard for network node interface
G.708 – ITU-T standard for control of digital hierarchy
G.709 – ITU-T standard for optical transport network
G.711 – ITU-T standard for audio companding
G.729 – ITU-T standard for audio data compression
GPON – Gigabit Passive Optical Network
GSM – Global System for Mobile Communications
GSM-R – Global System for Mobile Communications – Railway
GMR – Global Mobile Radio
HDLC – High-Level Data Link Control
HDSL – High bit-rate Digital Subscriber Line
HFC – Hybrid Fiber-Coaxial
HTTP – HyperText Transfer Protocol
HTTPS – HyperText Transfer Protocol Secure
ICT – Information and Communication Technology
ICMP – Internet Control Message Protocol
IEEE – Institute of Electrical and Electronics Engineers
IETF – Internet Engineering Task Force
IGMP – Internet Group Management Protocol
IGP – Interior Gateway Protocol
ILEC – Incumbent Local Exchange Carrier
IMAP – Internet Message Access Protocol
IP – Internet Protocol
IPX – Internetwork Packet Exchange
IPv4 – Internet Protocol version 4
IPv6 – Internet Protocol version 6
ISDN – Integrated Services Digital Network
ISP – Internet Service Provider
ITU – International Telecommunication Union
ITU-T – International Telecommunication Union – Telecommunication Standardization Sector
IXC – Interexchange Carrier
LACP – Link Aggregation Control Protocol
LAN – Local Area Network
LATA – Local Access and Transport Area
LDAP – Lightweight Directory Access Protocol
LLDP – Link Layer Discovery Protocol
LLC – Logical Link Control
LOS – Line of Sight
MAC – Media Access Control
MAN – Metropolitan Area Network
MDF – Main Distribution Frame
MEF – Metro Ethernet Forum
MGCP – Media Gateway Control Protocol
MIMO – Multiple Input Multiple Output
MPLS – Multi-Protocol Label Switching
MPLS-TP – MPLS Transport Profile
MST – Multiple Spanning Tree
MSTP – Multiple Spanning Tree Protocol
MUX – Multiplexer
NANP – North American Numbering Plan
NAS – Network Attached Storage
NAT – Network Address Translation
NEXT – Near-End Crosstalk
NID – Network Interface Device
NOC – Network Operations Center
NR – New Radio (5G)
NRZ – Non-Return-to-Zero
OC – Optical Carrier
OC-3 – Optical Carrier 3
OC-12 – Optical Carrier 12
OC-48 – Optical Carrier 48
OC-192 – Optical Carrier 192
OC-768 – Optical Carrier 768
OAM – Operations, Administration, and Maintenance
OAM&P – Operations, Administration, Maintenance, and Provisioning
OFDMA – Orthogonal Frequency Division Multiple Access
OLT – Optical Line Terminal
ONT – Optical Network Terminal
OEO – Optical-Electrical-Optical
OLS – Optical Line System
O-RAN – Open Radio Access Network
OSS – Operations Support System
P2P – Point-to-Point
PAT – Port Address Translation
PBX – Private Branch Exchange
PDH – Plesiochronous Digital Hierarchy
PIM – Protocol Independent Multicast
PON – Passive Optical Network
POP – Post Office Protocol
PPE – Premises Equipment
PSTN – Public Switched Telephone Network
PTT – Push-to-Talk
PTP – Precision Time Protocol
QAM – Quadrature Amplitude Modulation
QoS – Quality of Service
RADIUS – Remote Authentication Dial-In User Service
RAN – Radio Access Network
RAS – Remote Access Service
RARP – Reverse Address Resolution Protocol
RFI – Radio Frequency Interference
RFOG – Radio Frequency over Glass
RJ – Registered Jack
ROADM – Reconfigurable Optical Add-Drop Multiplexer
RSVP – Resource Reservation Protocol
RTP – Real-Time Protocol
RSTP – Rapid Spanning Tree Protocol
RTC – Real-Time Communication
RTT – Round Trip Time
SAN – Storage Area Network
SDH – Synchronous Digital Hierarchy
SDN – Software-Defined Networking
SDSL – Symmetric Digital Subscriber Line
SFP – Small Form-factor Pluggable
SHDSL – Single-Pair High-Speed Digital Subscriber Line
SIP – Session Initiation Protocol
SIP-T – Session Initiation Protocol for Telephones
SLA – Service Level Agreement
SNMP – Simple Network Management Protocol
SONET – Synchronous Optical Networking
SSL – Secure Sockets Layer
STP – Spanning Tree Protocol
STM – Synchronous Transport Module
STS – Synchronous Transport Signal
TA – Terminal Adapter
TAPI – Telephony Application Programming Interface
TCM – Trellis-Coded Modulation
TCP – Transmission Control Protocol
TE – Traffic Engineering
TDM – Time Division Multiplexing
TIA – Telecommunications Industry Association
TIP – Telecom Infra Project
TLS – Transport Layer Security
TMI – Telecommunication Management Infrastructure
TSP – Telecommunication Service Provider
UDP – User Datagram Protocol
VDSL – Very-high-bit-rate Digital Subscriber Line
VDSL2 – Very-high-bit-rate Digital Subscriber Line 2
VLAN – Virtual Local Area Network
VoDSL – Voice over DSL
VoIP – Voice over Internet Protocol
VPN – Virtual Private Network
WAN – Wide Area Network
WDM – Wavelength Division Multiplexing
WEP – Wired Equivalent Privacy
WLAN – Wireless Local Area Network
WPA – Wi-Fi Protected Access
WPA2 – Wi-Fi Protected Access 2
xDSL – Various types of Digital Subscriber Line technologies
The author, Rob Halik, is a Senior Analyst at Tellennium, specializing in Managed Mobility Services, Telecom Expense Management, and Utility Bill Management. With over 25 years of industry experience, Rob offers enterprise expense management insights to help businesses streamline operations and reduce costs. This article is a collaborative effort by Tellennium’s expert team members, including Greg McIntyre, Shawn Veitz, Matt McIntyre, and Todd Givens, who together bring over 100 years of industry experience to the table.
Explore More Articles
Your Guide to Telecom Expense Management
Telecom expenses can be a significant portion of your company’s overall budget. Effective TEM can help businesses reduce costs, improve efficiency, and optimize their telecom infrastructure. Your Guide to Telecom Expense Management Read Below or Download the Report PDF What this report covers: Introduction to Telecom Expense Management Key Features to Look for in a
Technology Expense Management: How TEM Has Evolved
Technology expense management is the broader evolution of traditional telecom expense management. It applies established expense management practices beyond fixed telecom services to mobility, SaaS, utilities, and other enterprise expenses. Understanding this expanded scope helps organizations manage a wider range of technology costs with greater visibility and control. The term TEM originally focused on enterprise
A 4 Step Guide to Selecting a Telecom Expense Management (TEM) Provider
For enterprise communications network operations and financial management teams, selecting a telecom expense management (TEM) provider to partner with is the single biggest decision that they will make relative to optimizing their organization’s communication network for the right services at the right costs over the upcoming years. The right TEM partner will bring an advanced modern day expense management technology platform to the table along with a team