toggle menu

Home / Computing & IT / Telecom

Computing & IT >> Telecom Abbreviations

Look through 4999 acronyms and abbreviations related to Telecom:

• XFMR — Transformer
• IPB — Invision Power Board
• LAN — Local Area Network
• URL — Universal Resource Locator
• DDRS — Dynamic Data Rate Selection
• ASAP — As Soon As Possible (pronounced AY-sap)
• ETA — Estimated Time of Arrival
• YTD — Year To Date
• YMMV — Your Mileage May Vary
• EBITDA — Earnings before Interest, Taxes, Depreciation and Amortization
• ANSI — American National Standards Institute, Inc.
• EDD — Earliest Due Date
• OIC — Oh I See
• OEM — Original Equipment Manufacturer (usually in reference to car parts)
• BTW — By The Way
• XML — Extensible Markup Language
• BBS — Bulletin Board Service
• FTP — File Transfer Protocol
• IT — Information Technology
• ROM — Read-Only Memory
• DND — Do Not Disturb
• CPU — Central Processing Unit
• ECG — Electrocardiogram
• APR — Annual Percentage Rate
• GFSK — Gaussian Frequency Shift Keying
• THX — Thanks
• IP — Internet Protocol
• EPA — Environmental Protection Agency (US)
• AC — Alternating Current
• PPM — parts per million
• ARP — Address Resolution Protocol (ATM)
• LASER — Light Amplification By Stimulated Emission Of Radiation (cf. Maser)
• CBCU — Centralized Broadband Control Unit
• COB — close of business (End of duty day)
• DCE — Data Circuit-terminating Equipment
• CU — See You
• CSMA/CA — Carrier Sense Multiple Access/Collision Avoidance
• IRC — Internet Relay Chat
• CRT — Cathode Ray Tube (type of TV)
• UK — United Kingdom of Great Britain and Northern Ireland
• NB — Nota Bene. Abbreviation of the Latin expression commonly used to emphasise the importance of a statement, literally meaning 'observe well'. Or less politely and more amusingly, No Bullshit.
• FIFO — First In, First Out
• PDF — Portable Document Format (created by Adobe Acrobat)
• FAQ — Frequently Asked Questions (sometimes Pronounced Fak)
• POC — Point Of Contact
• ASCII — American National Standard Code for Information Interchange
• R&D — Research & Development
• MOU — Memorandum of Understanding (an MOU between Food & Drug Administratin and a regulatory agency in another country allows mutual recognition of inspections)
• GUI — Graphical User Interface (goo-ey)
• QC — Quality Control

• ATM — Automatic Teller Machine
• API — Application Programming Interface
• C4I — Command, Control, Communications, Computers, & Intelligence
• NMSE — Normalized Mean Square Error
• MTBF — Mean Time Before Failure
• YGWYPF — You Get What You Pay For
• AFAIK — As Far As I Know
• CCTV — Closed-circuit television
• CSR — Customer Service Representative
• IQ — Intelligence Quotient
• TQM — Total Quality Management
• C3I — Command, Control, Communications & Intelligence
• RF — Radio Frequency
• MRI — Magnetic Resonance Imaging
• BPM — Beats Per Minute
• DWDM — Dense Wavelength Division Multiplexing
• ISO — International Organization for Standardization
• LCD — Liquid Crystal Display
• EDI — Electronic Data Interchange
• CR — Carriage Return
• BTU — British Thermal Unit
• MAN — Metropolitan Area Network
• ISP — Internet Service Provider
• RFP — Request For Proposal
• LRU — Line Replaceable Unit
• BRDF — Bidirectional Reflectance Distribution Function
• CY — Calendar Year
• ISO — In Search Of
• TBD — To Be Determined
• VPN — Virtual Private Network (ATM)
• EU — European Union (1994; formerly referred to as the EEC or EC)
• FEMA — Federal Emergency Management Agency
• BRB — Be right back
• ATM — Asynchronous Transfer Mode
• GPS — Global Positioning System (ex-NAVSTAR)
• CSMA/CD — Carrier Sense Multiple Access with Collision Detection
• CT — Computed Tomography
• NPV — Net Present Value {economics}
• LED — Light-Emitting Diode
• LLC — Limited Liability Company
• P&L — Profit and Loss statement
• GIS — Geographic Information System
• CEO — Chief Executive Officer
• ASME — American Society of Mechanical Engineers
• GSM — Global System for Mobile Communications
• RPM — Revolutions Per Minute, (Rotations Per Minute)
• EAP — Employee Assistance Program
• SME — Subject Matter Expert
• JIT — Just in time
• ACK — Acknowledge (telecommunications; Cf. NAK)

• WWW — World Wide Web
• QA — Center for Quality Assurance in International Education
• F2F — Face To Face (also Meeting In Person)
• RQMT — Requirement
• AM — Amplitude Modulation
• DOD — United States Department of Defense
• SYN — Synchronous
• DOA — dead on arrival
• ASTM — American Society for Testing and Materials (Philadelphia, Pennsylvania)
• WTG — Way To Go
• CAD — Computer Aided Designer
• HTTP — Hypertext Transfer Protocol
• O&M — Operation and Maintenance
• PGP — Pretty Good Privacy (encryption)
• AMD — Advanced Micro Devices, Inc. (producer of computer chips)
• PDT — Pacific Daylight Time
• WAN — Wide Area Network
• DOE — Distributed Object Environment
• FET — Field Effect Transistor
• PO — Purchase Order
• WB — Welcome Back
• SD — Standard Deviation
• ABC — activity based costing
• OCR — Optical Character Recognition
• PDA — Personal Digital Assistant
• MIS — Management Information System (OSHA)
• X-BAR — Crossbar telephone exchange
• IAMAI — Internet and Mobile Association of India
• WBS — Work Breakdown Structure
• SMTP — Simple Mail Transfer Protocol
• CCB — Change Control Board
• RDF — Resource Description Framework
• CDR — Critical Design Review
• ISAR — Inverse Synthetic-Aperture Radar
• ARPA — Advanced Research Projects Agency (made early internet)
• EST — Eastern Standard Time
• UR — Your
• IRR — Internal Rate of Return
• SOW — Statement Of Work
• RTN — Regional Telecommunication Network
• DRAM — Dynamic Random Access Memory (dee-ram) (computing)
• RAM — random-access memory
• PDR — Preliminary Design Review
• ATTN — Attention
• DARPA — Defense Advanced Research Projects Agency (US)
• IPO — Initial Public Offering
• CD — Compact Disc
• IRL — In Real Life
• AGC — Automatic Gain Control
• AUP — Acceptable Use Policy

• WACN ID — Wide Area Communications Network IDentifier
• CAE — Computer-Aided Engineering
• VIP — Very Important Person
• ADSL — Asymmetric Digital Subscriber Line
• CRM — Customer Relationship Management
• SLA — Service Level Agreement
• FDIC — Federal Deposit Insurance Corporation
• S X S — Step-by-Step
• PC — Personal computer (host)
• ESA — European Space Agency
• BBS — Bulletin Board System
• LED — law enforcement desk; light emitting diode
• ACH — Automated Clearing House
• SRAM — Static Random Access Memory (ess-ram)
• NSF — National Sanitation Foundation
• VAT — Value Added Tax
• CV — Curriculum Vitae
• POS — Point Of Sale.Retail term, being the physical point at which products are displayed on shelves or paid for at the checkout, as in the EPOS acronym.
• RAEX — Roaming Agreement EXchange
• CPE — Customer Premises Equipment
• PVT — Private
• ACE — Access Control Entry
• ISDN — Integrated Services Digital Network
• HZ — cycles per second (hertz)
• TTYL — Talk To You Later (Internet Slang)
• SQL — Structured Query Language
• CC — Carbon Copy
• SWAG — Scientific Wild Ass Guess
• DOS — Disk Operating System
• FFT — Fast Fourier Transform
• XA-FR — Exchange Access Frame Relay
• TEMIP — Telecommunications Management Information Platform
• COO — Chief Operation Officer
• DSS — Decision Support System
• BFI — Brute Force and Ignorance. An expression found in everyday language since the early 1900s, meaning a heavy handed unrefined solution to a problem (especially fixing something - like bashing an electrical appliance to get it working again). In more recent
• DES — Data Encryption Standard
• PCB — printed circuit board
• MDF — Main Distribution Frame
• DHCP — Dynamic Host Configuration Protocol
• TNX — Thanks
• SSL — Secure Socket Layer
• RFC — Request For Comment
• CIO — Chief Information Officer
• X-OFF — Transmitter Off
• RFI — Request For Information. Sales department shorthand. Special priority when use in conjunction with RFN (see below).
• ICT — Information and Communication Technology
• KISS — Keep It Simple Stupid
• S-BCCH — Short Message Service Broadcast Control Channel
• EOM — End Of Message
• CBT — Computer Based Training

• AM — Ante Meridian
• VHF — Very High Frequency
• IETF — Internet Engineering Task Force
• OC-256 — Optical Carrier Signal, Level 256
• QFSK — Quadrature Frequency Shift Keying
• BCC — Blind Carbon Copy
• CDT — Central Daylight Time
• ATA — Area Transportation Authority
• E-LEAD — Ear Lead
• X-ON — Transmitter On
• ATC — Air traffic control
• NFS — Network File System
• UAX 14 — Unit Automatic eXchange type 14
• PNG — Portable Network Graphics (graphic file standard/extension)
• A-KEY — Authentication key
• B-ICI — Broadband Inter-Carrier Interface
• ASP — Application Service Provider
• RFQ — Request For Quotation
• ZDBOP — Ziff-Davis Benchmark Operation
• C-NBAP — Common Node B Application Part
• ABI — Application Binary Interface
• FIPS — Federal Information Processing Standard
• ASA — American Standards Association
• ROI — Return on Investment
• ITU — International Telecommunication Union
• WYSIWYG — What You See Is What You Get (pronounced Wizzy-wig. See Entry For Derived Acronyms)
• DCOM — Distributed Component Object Model
• QOS — Quality of Service
• POP — Point Of Presence (Internet)
• CMS — Content Management System
• CST — Central Standard Time (UTC-6 Hours)
• IVR — Interactive Voice Response (telephone technology)
• CGI — Common Gateway Interface
• MLS — Microwave Landing System
• NIST — National Institute of Standards and Technology
• MOB — Mobile
• RPI — Retail Price Index
• JV — Joint Venture
• GATT — General Agreement on Tariffs and Trade (government)
• CPM — Critical Path Method
• CFO — Communication Filing Officer
• ACM — Association for Computing Machinery
• DNS — Domain Name System
• RDBMS — Relational Database Management System
• SLIP — Serial Line Interface Protocol
• ECU — Electronic Control Unit
• IRS — U.S. Internal Revenue Service
• DAHDI — Digium/Asterisk Hardware Device Interface
• HVAC — Heating, Ventilation, and Air Conditioning
• EIS — Executive Information System

• DNS — Domain Name Service
• CIS — Commonwealth of Independent States
• RPM — Resale Price Maintenance. The UK Net Book Agreement, as was. Means by which retail prices are controlled by primary suppliers. (Alternatively, Revolutions Per Minute, as in engine speed and 78, 33 and 45 records. In years to come how many people will know
• OC-18 — Optical Carrier Signal, Level 18
• BSOD — Blue Screen Of Death
• FAA — Federal Aviation Administration
• MIPS — Millions of Instructions Per Second
• I.LINK — IEEE 1394, High Performance Serial Bus, implementation
• UHF — Ultra High Frequency (300-3000 MHz; 1m-10cm)
• DLL — Dynamic Link Library (computer file)
• AES — Advanced Encryption Standard
• NMR — Nuclear Magnetic Resonance
• MTTR — Mean Time To Repair
• WML — Wireless Markup Language
• D-NBAP — Dedicated Node B Application Part
• SAN — Storage Area Network
• M-CSI — Mobility management CAMEL (Customized Applications for Mobile network Enhanced Logic) Subscription Information
• CUL — See You Later
• SDD — Software Design Document
• ATOM — Any Transport over MPLS (Multi-Protocol Label Switching)
• EOT — End Of Transmission
• BPS — bits per second
• EEG — Electro-EncephaloGram
• H323 — ANSI standard for format over IP
• DOJ — Department of Justice (US)
• NATO — North Atlantic Treaty Organisation
• DC — Direct Current
• PRI — Primary Rate Interface (ISDN)
• CDMA — Code Division Multiple Access (voice/data transmission)
• C³CM — Command, Control and Communications Countermeasures
• UI — User Interface
• OS — Operating System
• SABGW — System Architecture Evolution Gateway
• T-CARRIER — Trunk Carrier
• SAR — Search And Rescue
• IP — Intellectual Property
• SDR — Special Drawing Rights
• ACL — Access Control List
• EFT — Electronic Funds Transfer
• DSL — Digital Subscriber Line
• CAM — computer aided manufacturing
• NA — Not Applicable
• CRC — Contrôle de Redondance Cyclique (French: Cyclic Redundancy Check)
• RFO — Reason For Outage
• FCC — Federal Communications Commission (US)
• MB — Megabyte
• CLI — Command line Interface (Cabletron)
• CSA — Canadian Space Agency
• I/O — Input/Output
• CIR — Committed Information Rate (Frame Relay)

• PM — Preventive Maintenance
• ROFL — Rolling on the floor laughing
• UDP — User Datagram Protocol (FDDI related)
• NYSE — New York Stock Exchange
• VC-ATOD — Virtual Clearinghouse on Alcohol, Tobacco and Other Drugs
• EC — European Commission
• T-IC — T-interConnect
• DBMS — Database Management System
• RQMTS — Requirements
• EEC — European Economic Community (predecessor of the European Union|EU)
• SIC — Standard Industrial Classification (Code)
• EDS — Electronic Data Systems Corporation
• CSMA/CD — Carrier sense multiple access / collision detection
• FSAI — Fiber Serving Area Interface
• ECO — Engineering Change Order
• ADPE — Automatic Data Processing Equipment
• SQA — Software Quality Assurance
• OC-9 — Optical Carrier Signal, Level 9
• UAV — Unmanned Aerial Vehicle
• USGS — United States Geological Survey (DOI)
• NTIS — National Technical Information Service Technology Administration
• GSA — U.S. General Services Administration
• VM — Voice Mail
• ADD — Addendum
• AAAS — American Association for the Advancement of Science
• UTC — Coordinated Universal Time
• PVC — Permanent Virtual Circuit (ATM)
• DB — Decibel
• UN — United Narions
• B2B — Business to Businesse
• AT&T — American Telephone and Telegraph (U.S. company, also known as "Ma Bell")
• KBYTE — Kilobyte (103)
• BER — Bit-Error Rate
• TCP — Transmission Control Protocol
• NOAA — National Oceanic and Atmospheric Administration (US)
• SCM — Supply Chain Management
• MHS — Message Handling System (electronic)
• GPRS — General Packet Radio Service
• PST — Pacific Standard Time (UTC-8 Hours)
• QMS — Quality Management System
• LF — Low Frequency
• BPR — Business Process Re-engineering
• ADR — Address
• FDDI — Fiber Distributed Data Interface
• CUG — Closed User Group
• BRI — Basic Rate Interface
• DTE — Data Terminal Equipment
• DSC — Differential Scanning Calorimetry
• AGP — Accelerated Graphics Port
• PDH — Plesiochronous Digital Hierarchy

• SAS — Statistical Analysis System
• AIR — Account Information and Refill
• CSMA — Carrier Sense Multiple Access
• VAZO — Violating All-Zero Octet
• M — Meter
• SCSI — Small Computer System Interface
• PSTN — Public Switched Telephone Network
• DAC — Discretionary Access Control
• BSD — Berkeley Software Distribution
• APT — Automatic Picture Transmission
• AE — Account Executive
• SOHO — Small Office Home Office
• ACE — Advanced Computing Environment
• STP — standard temperature and pressure (0° and 1 atm)
• OFC — Office
• ABR — Available Bit Rate
• CONG — Congestion message
• GB — Gigabyte
• CAD — Computer-Aided Design
• RDY — Ready
• KHZ — kilohertz (1000 cycles per second)
• BVR — Beyond Visual Range
• EBCDIC — Extended Binary Coded Decimal Interchange Code (pronounced Eb-see-dik) (cf. BCD)
• DDE — Dynamic Data Exchange (in software parlance)
• ADM — Add-Drop Multiplexer
• DSP — Digital Signal Processor
• ELF — Extremely Low Frequency
• IANA — Internet Assigned Numbers Authority
• ABET — Accreditation Board for Engineering and Technology, Inc.
• FX — Foreign Exchange
• PM — Project Manager
• AFC — Automatic Frequency Control
• SNMP — Simple Network Management Protocol (ATM)
• EMC — Electromagnetic Compatibility
• CMM — Capability Maturity Model
• PERT — Program Evaluation and Review Technique
• PPP — Point-to-Point Protocol
• TCO — Total Cost of Ownership
• PUHU — Pick Up Hang Up
• EAI — Enterprise Application Integration
• CS — Computer Science
• CIA — Central Intelligence Agency
• DMA — direct memory access (computer term)
• W3C — World Wide Web Consortium
• WWW — World Weather Watch
• Q&A — Question & Answer
• DBORS — Data Base of Records
• NIH — Not Invented Here
• AF — Audio Frequency
• DSA — Digital Signature Algorithm

• WWW3 — World Wide Web Consortium
• MAC — Media Access Control
• NEMA — National Electric Manufacturer's Association
• OMG — Object Management Group
• LMS — Learning management system
• OSHA — Occupational Safety and Health Act (1970)
• CM — Configuration Management
• ATCRBS — Air Traffic Control Radar Beacon System
• AOA — Angle Of Arrival
• FM — frequency modulation
• COR — Carrier Operated Relay
• CW — Continuous Wave
• MBR — Master Boot Record
• NEC — National Electrical Code
• CAA — Civil Aviation Authority
• AAC — Advanced Audio Coding
• BR — Branch
• EDT — Eastern Daylight Time
• AT&T — American Telephone & Telegraph
• AYT — Are You There
• AOL — America on line
• ERP — Enterprise Resource Planning
• SAIC — Science Applications International Corporation
• SAE — Society of Automotive Engineers
• JPEG — Joint Photographic Experts Group (24-bit image storage format)
• AQL — Acceptable Quality Level
• EMG — Electromyogram
• ACK — ACKnowledgment
• MLS — Multiple Listing Service
• CORBA — Common Object Request Broker Architecture
• TV — Television
• RPC — Remote Procedure Call
• WMO — World Meteorological Organization (ICSU)
• DC — Disconnected
• RSN — Real Soon Now [which may be a long time coming]
• RFI — Radio Frequency Interference
• RAID — Redundant Array of Inexpensive Disks
• RIP — Routing Information Protocol
• NOS — Network Operating System
• BST — British Summer Time
• DDD — Direct Distance Dial
• AWG — American Wire Gauge
• NPI — New Product Introduction
• EDP — Electronic Data Processing Plc (London Stock Exchange [LSE])
• RFD — Request For Discussion
• PBX — Private Branch eXchange (company phone system)
• EVP — Executive Vice President
• TC — Telephone Call
• WAP — Wireless Application Protocol
• DAM — Diagnostic Acceptability Measure

• HTML — Hyper Text Markup Language
• CMD — Command
• OSI — Open Systems Interconnection (iso Standard)
• NRC — National Research Council (Canada)
• USB — Universal Serial Bus
• AADC — Automated Area Distribution Center
• ROTFL — Roll On The Floor Laughing
• BIOS — Basic Input Output System
• DMSP — Defense Meteorological Satellite Program (U.S.)
• DDL — Data Definition Language
• ICANN — Internet Corporation for Assigned Names and Numbers
• CPT — Carriage Paid To
• MST — Mountain Standard Time
• VOL — Volume
• LD — Long Distance
• ZIP — Zone Improvement Plan
• RMS — root mean square (preferred over "RMS")
• VVX — Voice and Video eXchange
• KM — Knowledge Management
• CG — Center of Gravity (DXS)
• T&C — Terms & Conditions
• VR — Virtual Reality
• BT — British Telecommunications
• BCD — Binary-Coded Decimal
• CFV — Call For Vote(s)
• OM — Old Man
• ADN — Advanced Digital Network
• ROS — Return on Sales
• IM — Instant Message
• SGML — Standard Generalized Markup Language
• ACC — Adaptive Cruise Control
• ACTV — Active
• Z — Zero
• CRL — Certificate Revocation List
• 9 — Nine
• SCC — Standards Council of Canada
• VLF — Very Low Frequency
• AIS — Automated Information System
• PMA — Physical Medium Attachment
• MF — Medium Frequency
• CIS — CompuServe Information Service
• CCD — Charge Coupled Device - a device for the movement of electrical charge.
• AEC — Architecture, Engineering, Construction
• NIST — National Institute of Standards & Technology (US)
• MIB — Management Information Base (ATM)
• SBU — Strategic Business Units
• DME — Distance Measuring Equipment
• EW — Electronic Warfare
• PIN — Personal Identification Number
• BGP — Border Gateway Protocol (routing protocol)

• UPS — Uninterruptible Power Supply
• LDAP — Lightweight Directory Access Protocol (pronounced Ell-dap)
• ECP — Engineering Change Proposals
• NIMBY — Not In My Back Yard
• EEPROM — Electrically Erasable Programmable Read-Only Memory
• ERT — Emergency Response Team
• TNSTAAFL — There's No Such Thing As A Free Lunch
• NIC — Network Interface Card
• VBR — Variable Bit Rate (ATM)
• MMS — Multimedia Messaging Service
• WTO — World Trade Organisation
• AE — Application Entity
• VOIP — Voice Over IP (Internet Protocol)
• ISBN — International Standard Book Number (ISO 2108)
• LEO — Low Earth Orbit (satellite communications)
• ICMP — Internet Control Message Protocol
• WEP — Wired Equivalent Privacy
• MSN — Microsoft Network
• TEL — Telephone
• AMT — Amount
• NBS — National Bureau of Standards (US)
• MBPS — Megabits per second
• SMS — Short Message Service
• RWR — Radar Warning Receiver
• CES — Consumer Electronics Show
• PCM — Pulse-Code Modulation
• CU — Control Unit
• SHA — Secure Hash Algorithm
• WDM — Wavelength Division Multiplexing (fiber optics)
• AC — Access Control
• PDU — Protocol data unit (such as segment, packet, frame, etc.)
• PET — positron emission tomography
• CB — Call Back
• EDVAC — Electronic Discrete Variable Automatic Computer
• OSS — Operational Support System
• ADT — Atlantic Daylight Time (UTC-3 Hours)
• OLE — Object Linking and Embedding (Microsoft communication protocol)
• ATS — applications technology satellite
• RM — Regional Manager
• ENIAC — Electronic Numerical Integrator And Computer
• Y2K — Year 2000
• DRM — Digital Rights Management
• RM — Resource Management
• ASR — Airport Surveillance Radar
• UPS — Ultraviolet Photoelectron Spectroscopy
• ISSN — International Standard Serial Number (ISO 3297)
• OBO — Or Best Offer
• SCADA — Supervisory Control And Data Aquisition
• PD — Public Domain
• TNYWR — The Number You Will Receive

• MMU — Memory Management Unit
• EOB — End Of Business
• HF — High Frequency
• DTI — Department of Trade and Industry (UK)
• EAP — Extensible Authentication Protocol
• AVHRR — Advanced Very High Resolution Radiometer  
• OSPF — Open Shortest Path First (ATM)
• MIME — Multipurpose Internet Mail Extension
• D-H — Diffie-Hellman
• AATSR — Advanced Along-Track Scanning Radiometer
• EGA — Enhanced Graphics Adapter
• BNSC — British National Space Centre
• ISS — International Space Station
• ACD — Automatic Call Distributor
• ADC — Analog-Digital Converter
• BYOD — Bring Your Own Device
• SOAP — Simple Object Access Protocol
• DQPSK — Differential Quadrature Phase-Shift Keying
• JVM — Java Virtual Machine
• MGMT — Management
• PM — post meridian
• DOM — Document Object Model
• SIG — Special Interest Group
• SDK — Software Development Kit (Microsoft)
• TCP/IP — transmission control protocol/internet protocol
• ECE — Economische Commissie voor Europa (United Nations) (Dutch: Economic Commission for Europe)
• SEI — Software Engineering Institute
• PPB — parts per billion (109)
• NAFTA — North American Free Trade Agreement
• AMI — Advanced Metering Infrastructure
• NSA — National Security Agency
• ELINT — Electronic Intelligence Satellite
• BSA — Business Software Alliance
• ASEAN — Association of South East Asian Nations
• PCMCIA — Personal Computer Memory Card International Association
• CCM — counter-countermeasure
• LEC — Local Exchange Carrier
• PDN — Public Data Network
• RACF — Resource Access Control Facility
• MIT — Massachusetts Institute of Technology (U.S.)
• AES — Auger Electron Spectroscopy
• JAXA — Japan Aerospace Exploration Agency
• CHF — Swiss Franc
• STS — Space Transportation System
• CFD — Call For Discussion
• AD — Active Directory
• RTU — Remote Terminal Unit
• EC — European Community
• SDMA — Space Division Multiple Access
• CHAP — Challenge Handshake Authentication Protocol (ATM)

• WB — Write Back
• YL — Young Lady
• SVP — Senior Vice President
• CCNA — Cisco Certified Network Associated
• DWDM — Dense Wavelength-Division Multiplexing
• SDH — Synchronous Digital Hierarchy (ATM)
• CLM — Career Limiting Move. A reminder to think twice before embarking on any action that has an obvious whiff of disaster about it. (Ack R Gesling and S Phillips)
• ALC — Automatic Level Control
• EISA — Extended Industry Standard Architecture
• IEC — International Electrotechnical Commission
• LP — Low Pressure
• USD — United States Dollar
• HDML — Handheld Device Markup Language
• KB — Kilobyte: One thousand and twenty-four bytes kbps kilo bit per second
• LF — Line Feed
• CIM — Common Information Model
• SNR — Signal-to-Noise Ratio
• CFD — computational fluid dynamics
• FCS — Frame check sequence (Ethernet)
• APPL — Application
• DSN — Deep Space Network - network of large antennas and communication facilities.
• ACPI — Advanced Configuration and Power Interface
• AVL — Available
• EPR — Ethylene-Propylene Rubber
• DCE — Distributed Computing Environment
• NNTP — Network News Transfer Protocol
• PECVD — Plasma-Enhanced Chemical Vapor Deposition
• MAC — Message Authentication Code
• WORM — Write-Once, Read-Many
• RAD — Rapid Application Development
• JPL — Jet Propulsion Laboratory (California Institute of Technology) (NASA)
• HTTPS — HyperText Transfer Protocol Secure
• TB — Terabyte
• TLS — Transport Layer Security
• NCSA — National Center for Supercomputing Applications
• GHZ — Gigahertz
• DSTE — Digital Subscriber Terminal Equipment
• CCSDS — Consultative/Consultative Committee for Space Data Systems
• NIC — Network Information Center
• NESDIS — National Environmental Satellite, Data, and Information Service
• CG — Coast Guard
• BIP — Bit-Interleaved Parity
• BOFH — Bastard Operator From Hell
• AAAI — American Association for Artificial Intelligence's
• DLR — Design Layout Record
• WG — Working Group
• ISAS — Institute of Space and Astronautical Sciences (Japan)
• VAC — Vacant
• CTD — Cumulative Trauma Disorder
• VOC — Volatile Organic Compounds (air pollution)

• HW — Hardware
• AME — Amplitude Modulation Equivalent
• AIS — Alarm Indication Signal
• ADCCP — Advanced Data Communications Control Procedures
• ASK — amplitude shift keying
• 100BASE-T2 — 100 Megabits per Second, Baseband, Two-pair Category 3 UTP cables
• AT — Advanced Technology
• POTS — Plain Old Telephone Service (FCW)
• EFF — Electronic Frontier Foundation
• NOC — Network Operations Center
• HDLC — High-Level Data Link Control
• SBC — Southwestern Bell Corporation
• DCN — Design Change Notification
• WIPO — World Intellectual Property Organization
• PLD — Programmable Logic Device
• FASB — Financial Accounting Standards Board
• BUS — Business
• COQ — Cost Of Quality
• RU — Are You?
• SPC — Stored Program Control
• DASD — Direct Access Storage Device
• ADT — Abstract Data Type
• ECMA — European Computer Manufacturer's Association
• TCB — Trusted Computing Base
• PSK — phase-shift keying
• D-RAM — Dynamic Random Access Memory
• ARA — Apple Remote Access
• JST — Japan Standard Time
• 911 — Emergency Services Phone Number
• OD — Outside Diameter
• WLAN — Wireless Local Area Network
• MDA — Model Driven Architecture
• AU — Audio Unit
• DFS — Distributed File System
• ODBC — Open Database Connectivity
• LCP — Link Control Protocol
• NTIA — National Telecommunications and Information Administration
• DQE — Detective Quantum Efficiency
• CERT — Computer Emergency Response Team
• IRS — Interface Requirements Specification
• PKI — Public Key Infrastructure (cryptography)
• MS — Millisecond
• SPC — Statistical Process Control. Forerunning quality theory from the 1960s to TQC and TQM.
• HSDPA — High-Speed Downlink Packet Access
• CRIS — Carrier Route Information System
• SOGA — Share of Gross Adds
• VB — Visual Basic
• RACON — Radar Beacon
• RNC — Radio Network Controller
• DFD — Displaced Frame Difference

• TAG — Technical Advisory Group for Biological Control Agents of Weeds
• EHF — Extremely High Frequency
• CCSD — command communications service designator; control communications service designator
• C4 — Command, Control, Communications, and Computers
• ASQ — Alpha System Qualification
• EEHO — Either End Hop Off
• CSO — Customer Service Operations
• JSC — Johnson Space Center (Houston, TX)
• NIS — Network Information Service
• CMI — Computer Managed Instruction
• APIC — Advanced Programmable Interrupt Controller
• UML — Unified Modeling Language (Object Management Group, OMG)
• URI — Uniform Resource Identifier
• ECR — Electronic Cash Register
• PRF — Pulse Repetition Frequency
• LRJ — Location Reject
• TTY — Teletype Telex Machine
• ESF — Extended Super Frame (ATM)
• DSSS — Direct Sequence Spread Spectrum
• FAR — Federal Aviation Regulation
• NMS — Network Management System
• FCA — Free Carrier
• PT — Project Team
• ACT — ACTIVITY, ACTIVITIES
• ASQC — American Society for Quality Control's
• MRC — Monthly Recurring Charge
• MTU — Maximum Transmission Unit
• BG — Background
• ADP — Automatic Data Processor
• BIS — Bureau of Indian Standards
• ATN — Aeronautical Telecommunication Network
• B2C — Business-to-Consumer
• FEC — Forward Error Correction
• PE — Polyethylene
• ANI — Automatic Number Identification (Caller ID)
• ISAKMP — Internet Security Association and Key Management Protocol
• MPEG — Motion Picture Experts Group
• NTP — Network Time Protocol
• AEW — Airborne Early Warning
• QAM — quadrature amplitude modulation
• AS — Autonomous System
• RFS — Request For Service
• QI — Quality Improvement
• 3G — Third Generation mobile phone network
• STA — State
• TDMA — Time Division Multiple Access
• EDD — Envelope Delay Distortion
• FAX — Facsimile
• EMS — Express Mail Service
• IRDA — Infrared Data Association

• IPVX — Internet Protocol version X
• VTC — Video Teleconference
• ADF — Automatic Direction Finder
• ATF — Advanced Tactical Fighter
• OCC — Occupancy
• SRS — Software Requirements Specifications
• SMI — Structure of Management Information
• AP — Application Protocol
• ECN — Explicit Congestion Notification
• VMS — Virtual Memory System
• UA — User Agent
• PABX — private automatic branch exchange (telephone)
• CGM — Computer Graphics Metafile
• MDA — Monochrome Display Adapter
• PAR — Precision Approach Radar
• RCU — Remote Control Unit
• TRLR — Trailer
• CBC — cipher block chaining
• ADB — Apple Desktop Bus
• RDF — Radio Direction Finder
• STM — Short Term Memory
• RARP — Reverse Address Resolution Protocol
• AMHS — Automated Message Handling System
• GRE — Generic Routing Encapsulation
• SCTP — Stream Control Transmission Protocol
• DTX — Discontinuous Transmission
• CFE — Contractor-Furnished Equipment
• RAN — Radio Access Network
• DSA — Directory System Agent
• FEP — Front End Processor
• ITSEC — Information Technology Security Evaluation Criteria
• YABA — Yet Another Bloody Acronym
• BJT — Bipolar Junction Transistor
• IMSI — International Mobile Subscriber Identity
• ELT — Emergency Locator Transmitter
• MCD — Magnetic Circular Dichroism
• EGP — Exterior Gateway Protocol
• NFPA — National Fire Protection Association
• SAR — synthetic aperture radar (satellite)
• RDP — Radar Data Processing
• ORB — Object Request Broker
• SHF — Super High Frequency
• BPRZ — Bipolar Return-to-Zero
• CGI — Computer-Generated Imagery
• RH — Relative Humidity
• EPR — Electron Paramagnetic Resonance
• NCS — National Communications System
• DAT — Digital Audio Tape
• IPX — Internetwork Packet Exchange
• ISMI — International mobile subscriber identity

• CDE — Common Desktop Environment
• OSTP — Office of Science and Technology Policy
• APC — American Power Conversion
• CPS — characters per second
• MCC — Mission Control Center (JSC)
• AFOSR — Air Force Office Of Scientific Research(USA)
• CMP — Connection Management Protocol
• BOC — Bell Operating Company
• CIC — Circuit Identification Code
• ASIC — application-specific integration circuit
• BIU — Bus Interface Unit
• IS — International Standard
• 100BASE-T — 100 Megabits per second, Baseband, Twisted pair
• PAN — Personal Area Network
• IMEI — International Mobile Equipment Identity
• BAN — Base Area Network
• FAT — File Allocation Table
• MVS — Multiple Virtual Storage
• ARIN — American Registry for Internet Numbers
• ARQ — Automatic Repeat-reQuest
• FTTH — Fiber To The Home
• DDN — U.S. Defense Data Network
• WK — Week
• FTTB — Fiber To The Building
• VAS — Value Added Services
• HSD — High Speed Data
• TTYL — Type To You Later
• COM — Component Object Model
• ACAP — Application Configuration Access Protocol
• KDC — Kerberos Key Distribution Center
• DID — direct inward dial
• LZ — Landing Zone
• DCE — Data Communication Equipment
• RSVP — Resource Reservation Protocol (Internet)
• ECM — Electronic Counter Measures
• WPM — speech--words per minute
• SONET — Synchronous Optical Network
• SIL — Speech Interference Level
• FR — Frame Relay
• VCC — Virtual Channel Connection (ATM)
• CDR — Call-Detail Record
• SP — Service Provider
• NSAI — National Standards Authority of Ireland
• B-ISDN — Broadband Integrated Services Digital Network
• VLSI — Very-Large-Scale Integration
• DSCP — Differentiated Services Control Point
• VIRUS — Vital Information Resources Under Siege
• ADM — Add/Drop Multiplexer
• PCI — Peripheral Component Interconnect
• CRBT — Caller Ring Back Tone

• PDN — Packet Data Network
• LPE — Liquid Phase Epitaxy
• DIT — Directory Information Tree
• TKIP — Temporal Key Integrity Protocol
• DTR — Data Terminal Ready
• BS — Base Station
• BLOS — Beyond Line-Of-Sight
• BUR — Bandwidth Usage Redundancy
• ISRO — Indian Space Research Organisation
• TOS — Type Of Service
• SDLC — Synchronous Data Link Control
• PWD — Password
• APS — Automatic Protection Switching (SONET/SDH)
• PDS — Protected Distribution System
• DOT — Department of Telecommunications (India)
• NAS — Network Access Server
• BPDU — Bridge Protocol Data Unit
• 3GPP — Third Generation Partnership Project
• VOD — Video On Demand
• OSF — Open Software Foundation
• CMC — Career Management Center
• DCMI — Dublin Core Metadata Initiative (Online Computer Library Center)
• ATM — Adobe Type Manager
• QPSK — aeronautical quadrature phase shift keying
• ARG — Argument
• AWACS — Airborne Warning And Control System
• RSS — Really Simple Syndication
• SDP — Session Description Protocol
• ASR — Automatic Speech Recognition
• VSAT — Very Small Aperture Terminal (satellite service)
• WPAN — Wireless Personal Area Network
• MOS — Model Output Statistics
• COMINT — Communications Intelligence
• CC — Country Code
• MIC — Message Integrity Check
• APN — An Access Point Name
• GOS — Grade Of Service
• EEA — European Economic Area
• TG — Task Group
• ES — Errored Second
• DID — data item description
• OTA — Office of Technology Assessment (U.S.; abolished by Congress, Fall 1995)
• CA — Certificate Authority
• EULA — End User License Agreement (usually in reference to software)
• RSVD — Reserved
• ADF — automatic document feeder
• DDCMP — Digital Data Communications Message Protocol
• MSU — Microwave Sounding Unit
• YAHOO — You Are Hazy Over Oranges
• DUP — Duplicate

• NLM — National Library of Medicine (National Institutes of Health)
• YP — Yellow Pages
• RCS — Radar Cross Section
• SW — South West
• VXML — Voice eXtensible Markup Language
• HSCSD — High-Speed Circuit-Switched Data
• SAR — Specific Absorption Rate
• RCC — Rescue Coordination Center
• VF — Voice Frequency
• ATSR — Along-Track Scanning Radiometer
• CAL — Calorie
• MIS — Management Information Service
• ISA — Industry Standard Architecture
• CPS — Cycles Per Second (now Hertz)
• OTN — Optical Transport Network
• EMR — Electromagnetic Radiation
• DTD — Document Type Definition (XML)
• BERT — Bit Error Rate Tester (telecommunication)
• PROM — Programmable Read-Only Memory
• DAP — Directory Access Protocol
• TO — Technical Order
• BER — Basic Encoding Rules (ASN.1)
• CIFS — Common Internet File System
• HSS — Home Subscriber Server
• OMA — Open Mobile Alliance
• PAP — Password Authentication Protocol (ATM)
• FCA — Free Carrier Absorption
• MCSD — Microsoft Certified Solution Developer
• ASTD — American Society of Training and Development (Alexandria, Virginia)
• MS — Mobile Station
• CATV — Cable Television
• SEM — Space Environment Monitor
• TPDU — Transport Protocol Data Unit
• GBPS — Gigabits per second
• VGA — Video Graphics Array
• OAS — Organization of American States
• IS — Intermediate System
• BECN — Backward Explicit Congestion Notification
• ITT — Invitation To Tender
• SML/SMS — Service Management Layer/Service Management Service
• RCV — Receive
• DSS — Digital Signature Standard
• DCS — Data Collection System (NOAA Polar Orbiting Satellites)
• JTF — Joint Task Force
• NTFS — New Technology File System
• SKU — Stockkeeping Unit
• VRML — Virtual Reality Modeling Language
• CTS — Clear To Send
• SMDS — Switched Multimegabit Data Service (ATM)
• LPC — Linear Predictive Coding

• HLR — Home Location Register
• BT — BlueTooth
• TM — Technical Manual
• ESTEC — European Space Research and Technology Centre
• 100BASE-T4 — 100 Megabits per Second, Baseband, Four-pair Category 3 UTP cables
• PPARC — Particle Physics and Astronomy Research Council
• MTSO — Mobile Telephone Switching Office
• APM — Advanced Power Management
• CBR — Constant Bit Rate
• ESS — Electronic Switching System
• IIS — Internet Information Services
• RADIUS — Remote Authentication Dial-In User Service
• SSM — Source-Specific Multicast
• MPLS — Multi Protocol Label Switching
• DLC — Digital Loop Carrier
• POE — power over ethernetinjector
• NOTAM — Notice to Airmen
• IV — Initialization Vector
• AFS — Andrew File System
• PDC — Personal Digital Cellular
• UAS — Unavailable Seconds
• LISP — List Processing Language
• CAV — Constant Angular Velocity
• SVC — Switched Virtual Circuit (ATM)
• TFTP — Trivial File Transfer Protocol (ATM)
• CATV — Community Antenna Television
• STP — Spanning Tree Protocol
• OLAP — Online Analytical Processing
• SIT — Static Induction Transistor
• NE — North-East
• DUA — Directory User Agent
• FMC — Fixed Mobile Convergence "Mobile UC or Unified Communications over Wireless"
• LLC — Logical Link Control
• LCN — Logical Channel Number
• DDS — Digital Data Service
• EIA — Extended Interaction Amplifier
• RMI — Remote Method Invocation
• PIM — Personal Information Manager
• BBU — Baseband Unit
• AXE 10 — Series of electronic telephone exchanges from L.M. Ericsson
• MCA — Micro Channel Architecture
• ABBR — Abbreviation
• AMR — Automated meter reading also known as Automatic Meter Reading
• AR — Access Rate
• CBEMA — Computer & Business Equipment Manufacturers Association
• DISA — U.S. Defense Information Systems Agency
• SMB — Server Message Block
• FC — Fibre Channel
• FCP — Fibre Channel Protocol
• IEEE-SA — Institute of Electrical and Electronics Engineers - Standards Association

• UL — Uplink
• RX — Receive
• WS — Workstation
• ASE — Application Service Element
• MS — Management System
• NMT — Nordic Mobile Telephone
• DMS — Data Management System
• VM — Virtual Machine
• EMCON — Electromagnetic Emission Control
• TOA — Time Of Arrival
• EX — Exercise
• TWT — Traveling Wave Tube
• YYP — Yahoo Yellow Pages
• DA — Destination Address
• AMI — Alternate Mark Inversion
• NREN — National Research and Education Network
• LQC — Line Quality Control
• ACO — Additional Call Offering
• MS — Message Store
• SNA — System Network Architecture
• CDA — Command and Data Acquisition
• IW — Information Warfare
• CS — Cable Select
• OSS — Operations Support System
• JDK — Java Development Kit
• JCL — Job Control Language
• ABN — Abnormal
• MHS — Microwave Humidity Sounder
• TPC — The Phone Company
• ISOC — Internet Society
• AFM — Atomic Force Microscopy
• IRQ — Interrupt Request
• MMB — Middle Mouse Button
• EAC — Engineering Accreditation Commission
• CICS — Customer Information Control System (IBM Mainframe Software; Kicks Or C-I-C-S)
• MCU — Multipoint Control Unit
• NCP — Network Control Protocol
• TDM — Time Division Multiplexer
• JRE — Java Runtime Environment
• TE — Traffic Engineering
• IV&V — independent verification and validation
• PLMN — Public Land Mobile Network
• VLL — Virtual Leased Line
• NOAO — National Optical Astronomy Observatories (Tucson, AZ)
• ASI — Asynchronous Serial Interface
• DN — Distinguished Name
• ARINC — Aeronautical Radio Incorporated
• DCS — Digital Cross-connect System
• RT — Radiotelephone
• DBS — Direct Broadcast Satellite

• RTS — Request To Send
• TCSEC — Trusted Computer System Evaluation Criteria
• LR-WPAN — Low-Rate Wireless Personal Area Network
• POP — Post Office Protocol
• SLP — Service Location Protocol
• CCTA — Central Computer and Telecommunications Agency
• DSN — Defense Switched Network
• WCDMA — Wideband Code Division Multiple Access
• CF — Compact Flash
• PTP — Point to Point Transmission Service (electricity)
• SYM — Symmetric
• RPV — Remotely Piloted Vehicle
• ME — Mobile Equipment
• TE — Terminal Equipment
• DVMRP — Distance Vector Multicast Routing Protocol
• DSLAM — Digital Subscriber Line Access Multiplexer (Module)
• E — Echo Time Zone
• LIU — Line Interface Unit
• BRA — Basic Rate Access
• BACP — Bandwidth Allocation Control Protocol
• SLF — Super Low Frequency
• CAUCE — Coalition Against Unsolicited Commercial Email
• LLU — Local Loop Unbundling
• AIFF — Audio Interchange File Format
• TIFF — Tag Image File Format
• SDM — Service Delivery Management
• AMPS — Advanced Mobile Phone System
• NCAR — National Center for Atmospheric Research (US)
• ISO — Independent System Operator (US) (see also TSO) Responsible for grid management, but does not own assets. (electricity)
• TIA — Telecommunications Industry Association
• SOS — Save Our Souls (Help!)
• SCPC — single channel per carrier
• DPC — Destination Point Code
• AOI — Area Of Interest
• IAB — Internet Architecture Board
• IMC — Intermediate Metal Conduit
• NE — Network Element
• NAT — Network Address Translation
• CSA — Canadian Standards Association (like UL)
• ISO — Infrared Space Observatory
• CAN — Campus Area Network
• OC — Optical Carrier
• SA — Scientific American
• AIN — Advanced Intelligent Network
• NCSC — National Computer Security Center (NSA)
• LT — Line Termination
• TDRSS — Tracking and Data Relay Satellite System
• CCIR — International Radio Consultative Committee (French Acronym)
• TOP — Technical Office Protocol
• OOP — Object-Oriented Programming

• VPI — Virtual Path Identifier
• FITS — Flexible Image Transport System
• JIS — Japanese Industrial Standard
• WINS — Windows Internet Name Service
• NLMS — Normalized Least Mean Square
• ZIP — Zone Information Protocol
• DX — Duplex
• CMOS — Complementary Metal Oxide Semiconductors
• BS — Beam Splitter
• ISI — Inter-Symbol Interference
• FH — Frequency Hopping
• MCP — Microsoft Certified Professional
• AP — access point
• B3ZS — bipolar 3-zero substitution
• CABS — Carrier Access Billing System
• COAX — Coaxial
• CBDS — Connectionless Broadband Data Service
• NII — National Information Infrastructure (USA)
• CCIS — Common Channel Interoffice Signaling
• SM — Senior Member
• VC — Virtual Channel
• DEMUX — Demultiplexer
• CSU — Channel Service Unit
• DIS — Draft International Standard
• LSF — Line Spread Function
• TEC — Total Electron Content
• EIGRP — Enhanced Interior Gateway Routing Protocol
• FDD — Frequency Division Duplex
• FXO — Foreign Exchange Office
• IRTF — Internet Research Task Force
• CU — Channel Unit
• TOMS — Total Ozone Mapping Spectrometer (satellite Instrument)
• DIS — Distributed Interactive Simulation
• ADL — Advanced Distributed Learning
• CAM — Computer-Aided Mapping
• ADEOS — ADvanced Earth Observing Satellite (Japan)
• VHSIC — Very High-Speed Integrated Circuit
• WTLS — Wireless Transport Layer Security
• ASAR — Advanced Synthetic Aperture Radar 
• EMS — Element Management System (ATM)
• BSI — British Standards Institution
• FSK — Frequency-Shift Keying
• ACR — Attenuation Crosstalk Ratio
• CO — Central Office
• CFA — Carrier Facility Assignment
• EBCDIC — Extended Binary-Coded Decimal Interchange Code
• SBC — Session Border Controller
• SVC — Scalable Video Coding
• E — Energy
• 1000BASE-T — 1000 Megabits per Second, Baseband, Twisted Pair

• DII — Defense Information Infrastructure
• VBA — Visual BASIC for Applications
• TDOA — Time Difference Of Arrival
• DNIS — Dialed Number Identification Service
• CAC — Connection Admission Control (Asynchronous Transfer Mode)
• ACFQ — Absence Compensation Fair Queuing
• DNIC — Data Network Identification Code
• EMI — Electro-Magnetic Interference
• ASN.1 — Abstract Syntax Notation One
• UTP — unshielded twisted pair
• IS — Information System
• EPABX — Electronic Private Automatic Branch Exchange
• CIM — Corporate Information Management
• VLAN — Virtual Local Area Network
• SIP — Session Initiation Protocol
• CAVE — Cellular Authentication and Voice Encryption Algorithm
• SXS — Step-By-Step
• DMTS — Distinguished Member Of Technical Staff
• LSR — Local Service Request
• OAM&P — Operations, Administration, Maintenance & Provisioning
• FTAM — File Transfer Access and Management
• ERP — Enterprise Resource Management
• AAF — Advanced Authoring Format
• PSN — Packet Switched Network
• TTL — ToS and Time-to-Live
• CVD — Chemical Vapor Deposition
• DPSK — Differential Phase Shift Keying
• MAJ — Major
• LRC — Learning Resource Center
• MME — Mobility Management Entity
• PM — Phase Modulation
• LEP — Large Electron Positron
• AUI — Attachment Unit Interface
• TDD — Telecommunications Device for the Deaf
• ACF — Access Control Field
• MSRN — Mobile Station Roaming Number
• VESA — Video Electronics Standards Association
• WMAN — Wireless Metropolitan Area Network
• NRPB — National Radiological Protection Board
• MMSI — Maritime Mobile Service Identity
• CAB — Conformity Assessment Body
• BNC — Bayonet Neill-Concelman
• QI — Quality Indicator
• TOVS — TIROS Operational Vertical Sounder
• SAN — System Area Network
• DTU — Data Transfer Unit
• DSCP — Differentiated Services Code Point
• ACF — Advanced Communications Function (IBM)
• NDVI — Normalized Difference Vegetation Index
• AT — Access Tandem

• IRS — Inertial Reference System
• FE — Finite Element
• BTAM — Basic Telecommunications Access Method
• AAS — Adaptive Antenna System
• BIS — Business Information System
• LRC — Longitudinal Redundancy Check
• ROSAT — Roentgen Satellite
• VDS — Variable Depth Sonar
• LIS — Lightning Imaging Sensor
• DIBL — Drain-induced Barrier Lowering
• F — Frequency
• TDD — Time Division Duplex
• FAA — Federal Aviation Agency
• WAR — Weekly Activity Report
• CPN — Cisco Powered Network
• DT — DWDM (Dense Wavelength Division Multiplexing) Terminal
• ECP — Encryption Control Protocol
• VT — Virtual Terminal
• BDE — Borland Database Engine
• COPS — Common Open Policy Service
• AF — Assured Forwarding
• TCP/IP — Transmission Control/Internet Protocol
• HEX — Hexadecimal (base 16)
• RSRQ — Reference Signal Received Quality
• ARPU — Average Revenue Per User
• FCW — Federal Computer Week
• DS — Digital Signal
• AUD — Audit
• TAC — Technical Assistance Center
• ECS — Environmental Control System (Subsystem)
• BMEWS — Ballistic Missile Early Warning System (bee-mews)
• NCC — Network Control Center (GSFC)
• ESP — Encapsulating Security Payload
• SDP — Software Development Plan
• 4GL — Fourth-Generation Language
• SA — Source Address
• IEEE-CS — Institute of Electrical and Electronics Engineers Computer Society
• EMS — Enhanced Messaging Service
• COO — Cost of Ownership
• SPGA — Staggered Pin Grid Array
• PEM — Privacy-Enhanced Mail
• EST — Establish
• T — Temperature
• PGA — Programmable Gate Array
• ECPA — Electronic Communications Privacy Act 1986
• TCPA — Telephone Consumer Protection Act
• NSAP — Network Service Access Point
• CAM — Computer-Aided Manufacturing
• AFP — AppleTalk Filing Protocol
• F — Fellow

• IESG — Internet Engineering Steering Group
• SDSL — Symmetric Digital Subscriber Line
• P — Predicted
• DRFM — Digital Radio-Frequency Memory
• DCS — Digital Cross-Connect
• FEP — Front-End Processor
• LSI — Large Scale Integration -> VLSI
• CLDC — Connected Limited Device Configuration
• E2E — End-to-End
• PIC — Programmable Interrupt Controller
• LDP — Label Distribution Protocol
• DVB — Digital Video Broadcasting
• DAL — Dedicated Access Line
• RDI — Remote Defect Indicator (UNI Fault Management)
• NSS — Network Switching Subsystem
• SPA — Special Prorate Agreement
• QDR — Quad Data Rate
• AMLCD — Active Matrix Liquid Crystal Display
• RDBMS — Relational Data Base Management System (Oracle)
• NAS — Network-Attached Storage
• GDS — Global Distribution System
• NW — North West
• DW — Deep Water
• NAK — Negative Acknowledge
• NI — Network Interface
• RJ-14 — Registered Jack type 14 (2-wire connector)
• Y — Yes
• RISC — Reduced Instruction Set Computing
• WLTF — Wireless LAN (Local Area Network) Task Force
• ECAC — European Civil Aviation Conference
• WARC — World Administrative Radio Conference
• STI — Speech Transmission Index
• NIU — Network Interface Unit
• SAA — Systems Application Architecture
• LU — Logical Unit
• STM — Scanning Tunneling Microscopy
• RACH — Random Access Channel
• EFS — Encrypting File System
• TM — Thematic Mapper (Landsat)
• TLC — The Learning Channel
• CDS — Cell Directory Service
• BIP — Band Interleaved by Pixel
• ISM — Industrial, Scientific and Medical
• 10BASE-T — 10 Megabits per second, Baseband, Twisted pair
• 2W — Two Wire
• SWBD — Switchboard
• TDR — Time-Domain Reflectometry
• RJE — Remote Job Entry
• ATS — Automatic Transfer Switch
• DEM — Digital Elevation Model

• RMON — Remote Monitoring
• FEXT — Far-End Cross Talk
• VLSI — Very Large-Scale Integration
• BAOC — Barring of All Outgoing Calls supplementary service
• AAV — Accountholder Authentication Value
• BOD — Bandwidth on Demand
• UMA — Unlicensed Mobile Access
• AFSK — Audio Frequency Shift Keying
• VTS — Vessel Traffic Service
• IPR — Intellectual Property Right
• BHCA — Busy Hour Call Attempt
• DTMF — Dual-Tone MultiFrequency
• BY — Busy
• DER — Distinguished Encoding Rules
• WHT — Walsh-Hadamard Transform
• LPD — Low Probability of Detection
• UPT — Universal Personal Telecommunications
• ETSI — European Telecommunications Standard Institute
• COMJAM — Communications Jamming
• ECT — Explicit Call Transfer
• LAAS — Local Area Augmentation System
• CEV — Controlled Environment Vault
• STN — Station
• SPI — Service Provider Interface
• MHO — My Humble Opinion
• FEM — Finite Element Method
• SMPTE — Society of Motion Picture and Television Engineers, Inc.
• KAK — Key-Auto-Key
• OMS — Optical Multiplex Section
• UART — Universal Asynchronous Receiver/Transmitter
• CODEC — Coder/decoder
• ETS — European Telecommunication Standard
• SD — Software Development
• ASYNC — Asynchronous
• VCI — Virtual Channel Identifier
• HDSL — High-bit-rate Digital Subscriber Line
• RSS — root-sum-square
• IPS — Instructions Per Second
• IMPACT — Integrated Manufacturing Precision Assembly Cellular Technology
• LATA — Local Access and Transport Area
• CAMA — Centralized Automatic Message Accounting
• CO — Certificate of Origin
• WSDL — Web Services Description Language
• WWAN — wireless wide-area network
• PSN — Public Switched Network
• WAIS — Wide Area Information Server
• CRO — Central Records Office
• MSW — Most Significant Word
• ASARS — Advanced Synthetic Aperture Radar System
• DMT — Discrete Multi-Tone Technology

• IN — Intelligent Network
• PVD — Physical Vapor Deposition
• DCP — Design Change Package
• MSR — Microwave Scanning Radiometer
• DMI — Desktop Management Interface (computing)
• CAC — Carrier Access Code
• NT — New Technology, also Windows NT
• 4G — Fourth Generation Wireless Systems
• CPE — Customer Premise Equipment
• CTU — Central Terminal Unit
• SSMA — Spread-Spectrum Multiple Access
• NPA — Numbering Plan Area
• ASA — Acoustical Society of America
• PCS — Personal Communications Services
• PTO — U.S. Patent And Trademark Office
• WWAN — Wireless Wide Area Network
• FSK — Frequency Shift Keying
• PNP — Plug-and-Play
• OTS — Optical Transmission Section
• IAD — Integrated Access Device
• SUS — Suspension
• YA — Yet Another
• STK — Satellite Tool Kit
• DMX — De-MultipleXer
• MMC — Microsoft Management Console (Microsoft)
• BELLCORE — Bell Communications Research, Inc.
• IEEE — Institute of Electrical and Electronics Engineers
• PUK — PIN (Personal Identification Number) Unlocking Key
• SPD — Serial Presence Detect
• ESCA — photoelectron spectroscopy for chemical analysis
• ITP — Interactive Telecommunications Program
• SVD — Singular Value Decomposition
• IPCP — Internet Protocol Control Protocol
• VTAM — Virtual Telecommunication Access Method
• ADT — American District Telegraph Company
• TRMM — Tropical Rainfall Measuring Mission (US-Japan)
• FIOS — Fiber Optic Services
• S/N — Signal-to-Noise ratio
• TI — Time Interval
• DL — Downlink Message
• FUP — Fair Use Policy
• BLER — Block Error Rate
• LNP — Local Number Portability
• NLM — NetWare Loadable Module
• MEAS — Measure
• SITA — Société Internationale de Télécommunications Aéronautiques
• SATAN — Security Administrator Tool for Analyzing Networks
• DISN — Defense Information Systems Network
• FECN — Forward Explicit Congestion Notification (ATM)
• MTA — Message Transfer Agents (Internet)

• PTT — Push to Talk Testing
• CIP — Continuous Improvement Program
• OBC — Onboard Computer
• LSW — Least Significant Word
• CODASYL — COnference on DAta SYstems Languages
• CBP — Coded Block Pattern
• REA — Rural Electrification Administration (US)
• MSE — Mobile Subscriber Equipment
• BUFR — Binary Universal Form for the Representation (of data)
• ACSE — Association Control Service Element
• SG — Signaling Gateway (IETF)
• TCR — Temperature Coefficient of Resistance
• PTA — Pakistan Telecommunication Authority
• MTP — Message Transfer Part
• ODS — Operational Data Store (knowledge management)
• ESF — Edge Spread Function
• RJ-25 — Registered Jack type 25 (6-wire connector)
• NES — Network Encryption System
• FOSE — Federal Office Systems Exposition
• SEM — Scanning Electron Microscopes
• DIV — Divisionsion
• E&M — ear and mouth (special signaling leads)
• URN — Uniform Resource Namespace
• DUC — Digital Up-Converter
• CRLF — Carriage-Return Line-Feed
• MSC — Mobile Switching Center
• RP — Reference Point
• PIC — Peripheral Interface Controller
• CMIP — Common Management Information Protocol (ATM)
• 1FB — Single line, Flat Business rate;
• COMDEX — Computer Dealers Exposition
• WAAS — Wide Area Augmentation System
• FLM — First Line Maintenance
• RIPE NCC — Reseaux IP Europeens Network Coordination Centre
• TS — Technical Specification
• TSP — Telecommunications Service Priority
• B2B — Business-to-Business
• PUB — Publication (file name extension)
• GDM — GSM (Global System for Mobile communications) Data Module
• VQV — Voice Quality Value
• LQR — Linear Quadratic Regulator
• PU — Physical Unit (IBM)
• PHY — Physical Layer
• STM — Synchronous Transfer Mode
• PAM — Payload Assist Module
• CP — Change Proposal
• SLIP — Serial Line Internet Protocol
• DAC — Digital-To-Analog Converter
• TTY — teletype terminal
• HW — Hardware Wars

• SR — Slow Release
• HFC — Hybrid Fiber Coaxial
• GMRS — General Mobile Radio Service
• RGN — Region
• CSAT — Customer Satisfaction
• LFACS — Loop Facility Assignment and Control System
• SSAP — Source Service Access Point
• ASR — Access Service Request
• UAN — Universal Access Number
• DCN — Disconnect
• RRN — Routing Recording Number
• DLCI — data link connection identifier
• STU — Secure Telephone Unit
• LCR — Least Cost Routing
• TC — Technical Committee (HL7)
• FDTD — Finite Difference Time Domain
• BAN — Billing Account Number
• LSI — Large-Scale Integration
• SPADATS — Space Detection And Tracking System
• ESN — Electronic Serial Number
• W-CDMA — Wideband Code Division Multiple Access
• CAR — committed access rate
• CLNP — ConnectionLess-mode Network Protocol
• AC — Area Code
• SWAP — Shared Wireless Access Protocol
• PTT — Push to Talk Taster
• OT — Office of Telecommunications
• FWA — Fixed Wireless Access
• MX — Mixer
• PARC — Palo Alto Research Center
• CAM — Content Addressable Memory
• LMDS — Local Multipoint Distribution Service
• 2G — Second Generation Wireless Systems
• IWF — Interworking Function
• RADARSAT — Radar Satellite
• EAS — Extended Area Service
• CER — Cell Error Ratio
• EIR — Excess Information Rate
• WAFB — Wireless Absolute Fairness Bound
• ACT — Activity
• LAG — Link Aggregation Group
• IDT — Integrated Digital Terminal
• CDDI — Copper Distributed Data Interface
• FEA — Finite Element Analysis
• VSAM — Virtual Storage Access Method
• AMSS — Automatic Message Switching System
• PSD — Phase-Sensitive Detector
• XPS — X-Ray Photoelectron Spectroscopy
• KSU — Key Service Unit
• SZ — Seizure

• FCA — Free Carrier Alongside
• RECON — Reconnaissance
• ADPCM — Adaptive Differential Pulse Code Modulation
• STN — Station Casinos, Inc.
• DCS — Defense Communications System
• GSM — Groupe Speciale Mobile
• DPCM — differential pulse code modulation
• VAN — Value-Added Network
• LEN — Line Equipment Number
• RAU — Radio Access Unit (Army)
• NTSC — National Television Standards Committee
• STP — Signal Transfer Point
• L2TP — Layer 2 Tunneling Protocol
• TXM — Transmission X-ray Microscope
• MLP — Mobile Location Protocol
• CES — Circuit Emulation Service
• ROW — Rest Of World
• ENV — Environment
• DAS — Data Acquisition System
• AML — Amplitude Modulated Link
• TSO — Telecommunications Service Order
• CAAS — Communications-as-a-Service
• FR PVC — Frame Relay Permanent Virtual Connection
• MAG — Mobile Access Gateway
• NDS — Novell Directory Services
• IPLC — International Private Leased Circuit
• 4 GIG — 4 Giga Intellectual Gadget
• FE — Far End
• PP — Polypropylene
• Y — Yttrium
• RADIUS — Remote Authentication dial In User Service
• HTML — Hyper-Text Markup Language
• PDT — Portable Data Terminal
• DPL — Digital Power Line
• PAL — Programmable Array Logic
• IMAP — Internet Mail Access Protocol
• CNM — Customer Network Management
• HEHO — Head End Hop Off
• CLEC — Competitive Local Exchange Carrier
• EMEA — Europe, Middle East and Africa
• TC — Transmission Convergence (ATM)
• CSIRO — Commonwealth Scientific and Industrial Research Organization
• RADINT — Radar Intelligence
• CAPS — Call Attempts Per Second
• ACLR — Adjacent Channel Leakage Ratio
• ADN — Abbreviated Dialing Number
• CHTML — Compact Hypertext Markup Language
• MPI — Message Passing Interface
• RLS — Recursive Least Squares
• SPE — Synchronous Payload Envelope

• A — Anode
• UMTS — Universal Mobile Telecommunication System
• NIC — Network Interface Controller
• BCH — Binary Coded Hexadecimal
• ACC — Area Control Center
• CIRC — Cross-Interleaved Reed-Solomon Code
• NCP — Network Control Program
• M — Management
• NTDS — Naval Tactical Data System
• TBD — To Be Decided
• PSK — Phase Shift Key
• MGC — Multimedia Gateway Controller
• MC — Message Center
• PTT — Push to Talk Technology
• FRAD — Frame Relay Access Device
• VC — Virtual Circuit (ATM)
• CFNRY — Call Forwarding on No Reply
• SPA — Software Publishers Association
• MTI — Moving Target Indicator
• SDHLR — Super-Distributed Home Location Register
• IRLAN — Infrared LAN
• TOS — Temporarily Out of Service
• SINAD — SIgnal-to-(Noise And Distortion) ratio
• PLL — Phase Locked Loop
• DLP — Data Link Processor
• LN — Line
• ERL — Echo Return Loss
• TOP — technical/office protocol
• ABM — Asynchronous Balanced Mode
• COAM — Customer Owned And Maintained
• IEC — Interexchange Carrier
• DID — Digital Information Display
• TL1 — Transaction Language 1
• SASL — Simple Authentication and Security Layer
• TDWR — Terminal Doppler Weather Radar
• PBT — Polybutylene Terephthalate
• EIP — Equipment installation procedure
• IPOATM — Internet Protocol over ATM
• SIM — Subscriber Identity Module
• CCNA — Cisco Certified Network Administrator
• ER — Extended Range
• CACM — Communications of the ACM
• MBMS — Multimedia Broadcast/Multicast Service
• FTS — Federal Telecommunications System
• SPM — Scanning Probe Microscope
• QOI — Quality of Information
• TN — Telephone Number
• RSS — Radio Service Software (Motorola)
• DOCSIS — Data over Cable Service Interface Specification
• MOL — Manned Orbiting Laboratory

• HDTV — High-Definition Television
• AAS — advanced automation system (FAA)
• LSAP — Link Service Access Point
• NRP — Network Resource Planning
• NDIS — Network Driver Interface Specification (Microsoft Windows NT)
• CT — Computer Telephony
• EFIS — Electronic Flight Information System
• CASE — Computer-Aided Software Engineering
• TMSI — Temporary Mobile Subscriber Identity
• STD — Secondary Telecom District
• DVP — Digital Voice Privacy
• NMC — Network Management Center
• TBPS — Terabits Per Second
• AFI — Authority and Format Identifier
• TELNET — Telecommunications Network Protocol
• ASN.1 — Abstract Syntax Notation 1
• MD — Mediation Device
• RSN — Regional Service Network
• DMARC — Demarcation point
• TACACS — Terminal Access Controller Access Control System
• PUC — Public Utility Commission (electricity)
• IPS — InPlane Switching
• SFX — Special Effects
• CSPDN — Circuit Switched Public Data Network
• BUS — Broadcast and Unknown Server
• SAR — Segmentation and Reassembly (ATM)
• SLAM — Scanning Laser Acoustic Microscope
• CC — Call Control
• BCH — Bose-Chaudhuri-Hocquenghem Coding
• ARCNET — Attached Resource Computer Network
• TRS — Trunked Radio Systems
• DUV — Deep Ultraviolet
• AMA — automatic message accounting
• CD — Critical Dimension
• ST — Such That
• 2G — Second generation cellular
• CLI — Calling Line Identification
• SML — Service Management Layer
• FAS — Frame Alignment Signal
• HSPA — High Speed Packet Access
• REPT — Report
• UBR — Unspecified Bit Rate
• CNG — comfort noise generation
• MILNET — Military Network
• CLETS — California Law Enforcement Telecommunication System
• EA — Extended Address Field Bit
• PTP — Point To point Protocol
• AMPS — Advanced Mobile Phone Service (cellular phone standard)
• PWM — Pulse width modulation
• DL — Digital Library

• DL — Data Link
• DS-0 — Digital Signal, Level 0
• DHD — Dial Home Device
• DF — Direction Finding or Finder
• PDS — Planetary Data System
• ATC — Advanced Technology Center
• SRR — Search and Rescue Region
• L2F — Layer 2 Forwarding protocol
• 1-ESS — x-ESS series of Electronic Switching Systems
• LT — Less Than
• SCH — Synchronization Channel
• MAU — Multistation Access Unit
• VISSR — visible and infrared spin scan radiometer (GOES)
• NTE — Network Terminating Equipment
• ARD — Automatic Ring Down
• IRF — Impulse Response Function
• JAN — Joint Army-Navy
• SA — Selective Availability (on GPS transmissions)
• WSP — Wireless Session Protocol
• ESPN — Entertainment and Sports Programming Network
• RCC — Radio Common Carrier
• RMS — Resource Management System
• CQA — Certified Quality Auditor
• L2TPV3 — Layer 2 Tunneling Protocol Version 3
• MSDP — Multicast Source Discovery Protocol
• TRM — Technical Reference Model
• DA — deca
• SM OFC — Single-Mode Optical Fiber Cable
• MUSIC — MUltiple SIgnal Classification
• UNI — User-Network Interface
• ES — Emergency Service
• IP — Intelligent Peripheral
• BTC — Botswana Telecommunications Corporation
• BCDIC — Binary Coded Decimal Interchange Code
• SL — Single Line
• DICOM — Digital Imaging and Communications in Medicine
• SCR — Sustainable Cell Rate
• PLCP — Physical Layer Convergence Procedure
• TCM — Trellis-Coded Modulation
• NTU — Network Termination Unit
• EBS — Electron Bombarded Silicon
• WSFL — Web Services Flow Language
• IOC — Inter-Office Channel
• CCITT — Comit? Consultatif International T?l?graphique et T?l?phonique
• SIL — Solid Immersion Lens
• AN — Access Node
• MEID — Mobile Equipment Identifier
• CTI — Computer Telephony Integration
• MSI — Maritime Safety Information
• LBR — Low Bit Rate

• ANS — Advanced Network Services
• LUNT — Line Unit Network Termination
• BTN — Billing Telephone Number
• OPC — Originating Point Code
• ATS — Air Traffic Services
• OLS — Optical Line System
• SM — Service Module
• ATSC — Advanced Television Systems Committee
• MAP — Mobile Application Part
• A/C — Air Conditioner
• JISC — Japanese Industrial Standards Committee
• M/W — MicroWave
• ATCA — Advanced Telecom Computing Architecture
• TOU — Time of use (rate) (electricity)
• PMP — Project Management Professional
• PNP — Positive-Negative-Positive
• PT — Payload Type (ATM)
• FA — Functional Area
• DQDB — Distributed Queue Dual Bus
• GTP — GPRS (General Packet Radio Service) Tunneling Protocol
• DPNSS — Digital Private Network Signaling System
• DDLD — Direct Dial Long Distance
• RLC — Radio Link Control
• B3G — Beyond Third Generation
• BONDING — Bandwidth On Demand Interoperability Group
• CI — Common Interface
• SCP — Service Control Point
• MTD — Moving Target Detection
• SDNS — Secure Data Network System
• TUR — Trunk Utilization Report
• CP — Cell Phone
• CPC — Calling Party Control
• ARC — Army Reuse Center
• EPP — Enhanced Parallel Port (PC)
• E — Electra
• USRT — Universal Synchronous Receiver/Transmitter
• NNM — Network Node Manager
• DSU — Digital Service Unit
• TELECOMMUTE — Telecommuting
• FTTC — Fiber To The Curb光纤到路边
• SH — Shell
• SCN — Switched Circuit Network
• BSS — Base Station Subsystem
• DFG — difference-frequency generation
• OTDOA — Observed Time Difference of Arrival
• BMS — Business Management System
• ECM — Error Correction Model
• VOP — Voice Over Packet
• CDC — Connected Device Configuration
• RSL — Restricted Service License

• RT — Remote Terminal
• TE — Test Equipment
• AIF — Audio Interchange Format
• VPWS — Virtual Private Wire Service
• CNG — Fax Calling Tone
• SDU — Signal Distribution Unit
• DPDU — Data Protocol Data Unit
• TEI — Terminal Endpoint Identifier
• MPI — Minimum Picture Interval
• CDV — Cell Delay Variation(ATM)
• MOS — Metal Oxide Semiconductor (FET Devices)
• B6ZS — Bipolar 6 Zero Substitution
• BIND — Berkeley Internet Name Domain
• CALEA — Communications Assistance for Law Enforcement Act
• PSO — Professional Services Organization
• SCO — Synchronous Connection Oriented
• XRF — X-Ray Fluorescence
• SMT — station management (protocol)
• NEMP — Nuclear Electromagnetic Pulse
• CMIS — Common Management Information Service
• MGCP — Multimedia Gateway Control Protocol
• RDMA — Remote Direct Memory Access
• FCFS — First-Come, First-Served
• OST — Office of Science and Technology
• CMRS — Commercial Mobile Radio Service
• TDRS — Tracking and Data Relay Satellites
• PG — Page
• DEC — Decimal
• O/S — Operating System
• ECTF — Enterprise Computer Telephony Forum
• FEBE — Far End Block Error (SONET)
• O — objective
• OSP — Outside Plant
• MRT — Medical Response Team
• METRO — Metropolitan
• CALS — Computer Aided Acquisition and Logistic Support
• GSTN — General Switched Telephone Network
• CMT — Cadmium Mercury Telluride
• CSPRM — Common Signaling Protocols Resource Module
• SMS — System Management Server
• FIRST — Forum of Incident Response and Security Teams (CERT)
• FOIP — Fax Over Internet Protocol
• VAD — Voice Activity Detection
• SVC — Switched Virtual Connection
• UAT — Universal Access Transceiver
• DCS — Digital Cellular System
• CSAR — Combat Search and Rescue
• TCIC — Trunk Circuit Identification Code
• BBM — Blackberry Messenger
• SIL — Silence

• TTY — Text Teletype
• MBE — Molecular Beam Epitaxy
• DPL — Digital Private-Line
• ANC — Access Network Controller
• FITL — Fiber-In-The-Loop
• DBRNC — deciBel Relative to Noise in a Circuit
• SSRC — Synchronization Source
• MC/MIC — Mode Common/Mode Indicate Common
• SSU — Stratospheric Sounding Unit (TOVS)
• MP — Multilink Protocol
• TLK — Talk
• C — Cost
• PIM — Protocol Independent Multicast
• SISIR — Singapore Institute of Standards and Industrial Research
• CCSA — Common Control Switching Arrangement
• DL — Definition List
• LANE — Local Area Network Emulation
• SLBM — Submarine-launched ballistic missile
• MNP — Mobile Number Portability
• HEC — Header Error Control
• FRS — Family Radio Service
• 4W — Four-Wire
• IAT — Integrated Access Terminal
• DGPT — Directorate General of Posts and Telecommunications
• MFLOPS — Millions of Floating Point Operations per Second
• GI — Graded-Index
• CGA — Color Graphics Adapter
• DAC — Digital to Analog Converter-Audio
• ATD — Advanced Technology Demonstration
• DSSSL — Document Style Semantics and Specification Language
• CIAC — Computer Incident Advisory Capability
• SPX — Sequenced Packet Exchange
• CSC — Common Signaling Channel
• SIMT — Système interbancaire marocain de télécompensation
• RTU — Right to Use
• RLU — Remote Line Unit
• WPS — Wireless Priority Service
• PS — Product Specification
• MBWA — Mobile Broadband Wireless Access
• MITI — Ministry of International Trade and Industry
• OWS — Operator Work Station
• 3G HSPA — Third-Generation High-Speed Packet Access
• MIDP — Mobile Information Device Profile
• MO — Magneto-optic
• TLT — Test Loop Translator
• STA — Science and Technology Agency (Japan)
• TSR — Telecommunications Service Request
• ARSR — Air Route Surveillance Radar
• FRS — Frame Relay Service
• EKTS — Electronic Key Telephone Set

• PRI — Priority
• FAT — Final Acceptance Testing
• EV — electronvolt
• MOD — Modify
• NWK — Network
• APDU — Application Protocol Data Units
• VCC — Voice Call Continuity
• FTNS — Fixed Telecommunications Network Services
• XC — Cross-Connect
• BHCA — Busy Hour Call Attempts
• KTS — Key Telephone System
• DXI — Data Exchange Interface
• EIR — Equipment Identity Register
• CDV — Compressed Digital Video
• CPG — Converged Packet Gateway
• SAI — Serving Area Interface
• LSP — Label Switched Path
• DTN — Data Transfer Network
• ARM — Asynchronous Response Mode
• ETN — Electronic Tandem Network
• FDOA — Frequency Difference Of Arrival
• SS7 — Signaling System 7
• DMT — Discrete Multi-tone Transmission
• DMS — Defense Messaging System
• SSM — Synchronization Status Message
• CCLC — Carrier Common Line Charge
• RM-ODP — Reference Model for Open Distributed Processing
• ATA — Analog Telephone Adapter
• BSA — Basic Service Area
• RDT — Remote Digital Terminal
• BWD — backward
• VPA — Valid Peripheral Address
• ASDE — Airport Surface Detection Equipment
• AWS — Advanced Wireless Services
• EU — End User
• VCT — Variable Cam Timing
• UMTS — Universal Mobile Telecommunications Standard
• DOR — Detailed Outage Report
• ACP — Access Control Point
• NETBIOS — Network Basic Input-Output System
• LCGN — Logical Channel Group Number
• SE — Southeast
• MR — Mobile Router
• PCI — Personal Computer Interface
• VOA — Voice Of America
• EGSM — Extended Global System for Mobile Communications
• CGA — Carrier Group Alarm
• HUACA — Hang Up And Call Again
• HFC — Hybrid Fiber/Coaxial network
• ATRAC — Adaptive Transform Acoustic Coding

• DUN — Dial-Up Networking
• SFN — Single Frequency Network
• BT — Bluetooth Tablet
• 3-D — 3-Dimensional
• DCA — Dynamic Channel Assignment
• ISI — Intersymbol Interference
• SLIC — Subscriber Line Interface Circuit
• X — X Window System
• CRB — Cramer-Rao Bound
• FIFO — first-in, first-out
• IPM — Inches Per Minute
• IDF — Independent Distribution Frame
• DTI — Digital Trunk Interface
• EST — Electroshock Therapy
• SMMR — Scanning Multichannel Microwave Radiometer
• BABT — British Approvals Board for Telecommunications
• NAP — Network Access Point
• SRL — Singing Return Loss
• JSC — Joint Scientific Committee (ICSU, WCRP, and WMO)
• RT — Response Time
• DII — Dynamic Invocation Interface
• FHSS — Frequency Hopping Spread Spectrum
• CSR — Customer Service Request
• BSC — Base Station Controller
• SEC — Software Engineering Center
• OSA — Open System Architecture
• ISG — Information Systems Group
• SAF — System Access Fee
• CND — Calling Number Display
• TX — Transmit
• OS/2 — Operating System/2
• 3GSM — Third-generation Global System for Mobile (communications)
• DLT — Delete
• RA — Risk Analysis
• CDR — Clock and Data Recovery
• ALT — Accelerated Life Test
• PVC — Permanent Virtual Connection
• DLU — Digital Line Unit
• CGI — Cell Global Identity
• ILEC — Incumbent Local Exchange Carrier
• PY — person-year
• AAV — Alternate Access Vendor
• IS 41 — Interim Standard 41 (Inter-Cellular Network Communication Protocol)
• Q — Quadrature
• LDM — Limited Distance Modem
• BIC — Bus Interface Controller
• DDU — Disk Drive Unit
• VP — Virtual Path (ATM)
• GFC — Generic Flow Control (ATM)
• CVR — Crystal Video Receiver

• FAW — Frame Alignment Word
• CERN — Conseil Europeen Pour La Recherche Nucleaire
• 3GPP — Third-Generation Partnership Project
• Z — Zulu Time
• B8ZS — Binary Eight Zero Substitution
• BAN — Building Area Network
• CB — Common Battery
• ALB — Analog Loopback
• SQ — Service Quality
• N-AMPS — Narrowband Advanced Mobile Phone System
• PE — Probable Error
• IPRC — Intellectual Property Rights Committee
• TD-CDMA — Time Division - Code Division Multiple Access
• ZD — Zero Defects
• DARTS — Design Approach for Real-Time Systems
• LCAS — Link Capacity Adjustment Scheme
• CELP — Code Excited Linear Prediction
• DC — Display Controller
• PSNEXT — Power Sum Near End Cross Talk
• DFE — Design For Environment
• SMR — Specialized Mobile Radio
• SDN — Software Defined Network
• WVPN — Wireless Virtual Private Network
• DNU — Do Not Use
• C² — Command and Control
• NRZ — Nonreturn To Zero
• ARPANET — ARPA Network
• ADC — Access Deficit Charge
• TCS — Telephony Control Specification
• ECDIS — Electronic Chart Display Information System
• DDL — Digital Data Link
• CEPT — Conférence Européenne des Administrations des Postes et des Télécommunications
• OSCAR — Orbiting Satellite Carrying Amateur Radio
• VNL — Via Net Loss
• REG — range extender with gain
• PLCP — Physical Layer Convergence Protocol (ATM)
• OODBMS — Object-Oriented Database Management Systems
• DM — Domain Model
• MIR — Maximum Information Rate
• EFCI — Explicit Forward Congestion Indication (ATM)
• OXCO — Oven-Controlled Crystal Oscillator
• CLP — Cell Loss Priority (ATM)
• GDK — GIMP (GNU Image Manipulation Program) Drawing Kit
• LSC — Link State Control
• OOK — On/Off Keying
• RNR — Receive Not Ready
• BSS — Basic Service Set
• NHRP — Next Hop Resolution Protocol (ATM)
• MDM — Mobile Device Management
• RAI — remote alarm indication

• BAP — Bandwidth Allocation Protocol
• NAM — Number Assignment Module
• TAD — Telephone Answering Device
• WTP — Wireless Transaction Protocol
• BS — Broadcast Satellite
• TRS — Telecommunications Relay Service
• CCR — Customer Controlled Reconfiguration (Sprint)
• GBT — Ground Based Tower
• DUV — Data-Under-Voice
• GSM-R — Global System for Mobile (communications) – Rail
• SAPI — Service Access Point Identifier
• WRED — Weighted Random Early Detection
• UP — User Profile
• C — Collector
• PMT — Photo Multiplier Tube
• SYNC — Synchronization
• CDPD — Cellular Digital Packet Data
• SR — Service Request
• VT — Vacuum Tube
• DE — Discard Eligibility (ATM)
• CONUS — Contiguous United States
• UCM — Use Case Map
• ADC — Administration Center
• FOC — Fiber-Optic Cable
• DPT — Dynamic Packet Transport
• DACS — Digital Access Cross-connect System
• BSS — Base Station System
• TU — Transmission Unit
• 2W — 2-Wire
• ISSI — Inter-Switching System Interface
• CIC — Carrier Identification Code
• SSM — Spread Spectrum Modulation
• LIM — Line Isolation Monitor
• STD — Subscriber Trunk Dialing
• TMRS — TRAFFIC MEASUREMENT AND RECORDING SYSTEMS
• ACU — Automatic Calling Unit
• CPH — Call Party Handling
• IT — Integration Test
• VLR — Visitor Location Register
• MAI — Multiple Access Interference
• CLK — Clock
• NAU — Network Addressable Unit
• SCCP — Signalling Connection Control Part
• IXC — interexchange carrier
• RS-422 — Recommended Standard 422 (ANSI/EIA standard for transmitting serial data)
• SF — Single Frequency
• DAS — Distributed Antenna System
• COT — Central Office Terminal
• PTI — Payload Type Indicator
• COO — Cell of Origin

• RDS — Rate Determining Step
• CDM — Conceptual Data Model
• LBS — Location-Based Services
• FEAT — Feature
• BCS — British Computer Society
• SCM — Single-Carrier Modulation
• LD — Laser Diode
• MV — Motion Vector
• AH — Authentication Header
• CD-ROM — Compact Disk-Read-Only Memory
• AAL — ATM (Asynchronous Transmission Mode) Adaptive Layer
• PTM — Point-To-Multipoint
• TCAM — Telecommunications Access Method
• ALOC — Average Length Of Call
• VPC — Virtual Path Connection (ATM)
• CBQ — Class-Based Queuing
• ASAS — All-Source Analysis System
• DSI — Digital Speech Interpolation
• EVA — Electronic Video Agent
• DXF — Data Exchange Format
• CYTA — Cyprus Telecommunications Authority
• AECT — Association for Educational Communications and Technology's
• SCCP — Signaling Connection Control Point
• DMT — Discrete Multi-Tone
• AIT — Automatic Identification Technology
• BIOS — Basic Input-Output System
• S/D — Source/Drain
• SNI — Subscriber Network Interface
• ICI — Interexchange Carrier Interface
• DCAS — Downloadable Conditional Access System
• BSID — Base Station Identity
• SAT — Satellite
• MTS — Message Transfer System
• CGSA — Cellular Geographic Service Area
• TSE — Toronto Stock Exchange
• BATM — Basic Telecommunication Access Method
• TBCD — Telephony Binary Coded Decimal
• NBP — Name Binding Protocol
• AIS-P — Alarm Indication Signal - Path
• SB — Switchboard
• ACE — Adaptive Communication Environment
• PDL — Positioning Data Link
• USF — Universal Service Fund
• LP — Line Pair
• DNI — Data Network Interface
• DMT — Digital-Discrete Multi-Tone
• VLP — Very Low Power
• HUP — Hook-UP
• CSCW — Computer-Supported Cooperative Work
• BRAN — Broadband Radio Access Network

• STE — Section Terminating Equipment
• SMSC — Short Message Service Center
• DPST — Double-Pole Single-Throw
• BOSS — Binary Object Storage System
• CAS — Column Address Strobe
• DM — Differential Mode
• WIS — WAN (Wide Area Network) Interface Sublayer
• UTL — Utility
• LORAN — Long Range Aid to Navigation System
• SRM — Scalable Reliable Multicast
• MLM — Multi-Longitudinal Mode
• LMT — Lightwave Microcell Transceiver
• IBS — In-Building Solutions
• DXC — Digital Cross Connect
• GRX — GPRS Roaming Exchange
• SS1 — Signalling System 1 (500/20 Hz tones)
• NIMH — Nickel-Metal Hydride
• BREW — Binary Runtime Environment for Wireless
• FMS — Fraud Management System
• SPID — Service Profile Identifier
• NC — Network Computer (PC Internet)
• P2P — Person-to-Person
• MAPI — Messaging Applications Programming Interface
• SPIN — Service Provider Identification Number
• ADM — Administration, Office of
• DCF — Distributed Coordination Function
• 4WA — Four Wire Analog
• AAL5 — ATM (Asynchronous Transmission Mode) Adaptation Layer 5
• WDN — Wireless Developer Network
• FDL — Facility Data Link
• DLL — Digital Local Line
• BCST — Broadcast
• LASA — Large Aperture Seismic Array
• RXQUAL — Received Signal Quality
• EDFA — Erbium-Doped Fiber Amplifier
• TEL & TEL — TELephone and TELegraph
• EBIC — Electron Beam Induced Current
• PACS — Personal Access Communications System
• GERAN — GSM (Global System for Mobile communications) Edge Radio Access Network
• FGDC — Federal Geographic Data Committee's
• PAM — Pulse Amplifier Modulation
• EM — Electromigration
• BNCC — Base Network Control Center
• MLA — Modern Language Association
• AVR — Automated Voice Response
• CDA — Communications Decency Act's
• CIP — Carrier Identification Parameter
• ZCZ — Zero Correlation Zone
• BHA — Busy Hour Attempts
• ALI — Automatic Location Information

• ETOC — Electronic Table of Contents
• LASINT — Laser Intelligence
• WDA — Wireless Digital Assistant
• TCAP — Transaction Capabilities Application Part
• ANSI-41 — ANSI standard for mobile management
• CMS — Conversational Monitor System
• CAP — Capability
• DDM — Data Distribution Manager
• PMMA — Polymethyl Methacrylate
• MDN — Mobile Directory Number
• FTTP — Fiber To The Premises
• AEA — American Electronics Association's
• INE — Intelligent Network Element
• CGI — Computer Graphics Interface
• GOSIP — Government Open Systems Interconnection Profile
• WBMP — Wireless Bitmap
• AWG — arrayed waveguide grating
• SOH — Section Overhead
• CRV — Call Reference Value
• CD ROM — Compact Disc Read-Only Memory
• 802.11 HR — High data Rate IEEE 802.11 Wireless LAN protocol
• UNI — User Network Interface
• TDM — Time Division Multiplexing
• CS-PDU — Convergence Sublayer - Protocol Data Unit
• F/W — Firmware
• CON — Concentrator
• BOA — Basic Object Adapter
• DMI — Distributed Management Interface
• SYSADM — System Administrator
• ARS — Automatic Route Selection
• TEM — Transmission Electron Microscope
• E — Echo
• DDD — Direct Distance Dialing
• 3GIP — Third Generation Internet Protocol
• BS — Backing Store
• LH — Link Handler
• KSPS — KiloSymbols Per Second
• TOC — Telecommunication Operations Center
• V — Variable
• PC — Peripheral Controller
• IRC — International Record Carrier
• 3G — 3rd Generation Wireless Format
• TRIG — Trigger
• GMSS — Global Mobile Satellite System
• GTB — Global Telecom Brokers
• SINS — Ship’s Inertial Navigation System
• GTM — Go to Meeting
• TAPI — Telephony Application Programming Interface
• * — Star, special function key
• MMDS — Multichannel Multipoint Distribution Service

• ARPT — Autorité de Régulation des Postes et Télécommunications
• AIS-V — Alarm Indication Signal - Virtual
• CV — Coding Violation
• CCR — Current Cell Rate (ATMF)
• VLBI — Very Long Baseline Interferometry
• COMB — Combined
• PSS — Performance Support System
• CB — Citizens' Band
• IDCP — Internet Device Control Protocol
• WATS — Wide Area Telecommunications Service
• TACSAT — Tactical Satellite
• CFS — Call for Service
• CS — Convergence Sublayer (ATM)
• AWT — Agence Wallonne des Télécommunications
• FFH — Fast Frequency Hopping
• A/D — Analog-to-Digital converter
• TMF — Telecommunications Management Forum
• ETF — Early Termination Fee
• UTRAN — UMTS (Universal Mobile Telecommunication System) Terrestrial Radio Access Network
• CFR-47 — Code of Federal Regulations Title 47 (FCC)
• DME — Distributed Management Environment (OSF)
• AM — Activity Manager
• APPN — Advanced Peer-to-Peer Network
• QSTN — Question
• JWG — Joint Working Groupof
• TRANSEC — Transmission Security
• ATU-C — ADSL (Asymmetric Digital Subscriber Line) Transceiver Unit - Central office end
• MMM — Mobile Media Mode
• SETI — Search for Extraterrestrial Intelligence
• OML — Object Model Library
• ATS — Abstract Test Suite
• CPC — Continous Packet Compression
• NA — Network Adapter
• MC — Maintenance Control
• QOSM — Quality of Service Management
• CP — Call Processing
• QOTS — Quality Of Telephone Services
• CAE — Common Application Environment
• CACH — Call Appearance Call Handling
• FTTK — Fibre To The Kerb
• EMR — Electromechanical Relay
• DCMES — Dublin Core Metadata Element Set
• # — Number sign, octothorp; special function key
• CCCH — Common Control Channel
• WFA — Wait for Answer
• EDC — Electronic Dispersion Compensator
• PTM — Packet Transport Mode
• CCA — Carrier-Controlled Approach
• IG — Interface Group
• HU — Hook Up

• AS — Access System
• TMS — Time Management System
• CIS — Computer and Information Science
• TA — Terminal Adapter (ATM)
• TON — IEEE/ACM Transactions On Networking
• NICT — National Institute of Information and Communications Technology
• IMP — Interface Message Processor
• BA — Behaviour Aggregate
• RADSL — Rate Adaptive Digital Subscriber Line
• LCP — Local Control Point
• JMA — Japanese Meteorological Agency
• DORA — EV-DO (EVolution-Data Optimized) standard Revision A
• WAE — Wireless Application Environment
• DDU — Digital Data Unit
• MFC — Multi-Frequency Code
• LOO — Likelihood of Occurrence
• WLL — Wireless Local Loop
• TP — Transition Point
• INMS — Integrated Network Management System
• MERIS — medium-resolution imaging spectrometer
• LDN — Local Directory Number
• DTU — Date/Time Update
• DCO — Dial Central Office
• TAM — Telephone Answering Machine
• MBS — Maximum Burst Size (ATM)
• CPAP — Customer Premises Access Profile
• REN — Ringer Equivalence Number
• BOM — Bit-Oriented Message
• DOV — Data-Over-Voice
• FB — Fine Business
• SCU — System Control Unit
• VGF — Voice Grade Facility
• CNE — Certified Novell Engineer
• TSG — Telephone Security Group
• P — Priority
• SDLC — Systems Development Life Cycle
• VSM — Vestigial Sideband Modulation
• BCSM — Basic Call State Model
• LTU — Line Terminating Unit
• BTS — Base Transceiver Station (cellular)
• UCA — Utility Communications Architecture
• SNIX — Single Noise Interference Xterminator
• SIA — Securities Industry Association
• VPX — Virtual Path Cross-Connect
• DTU — Data Terminal Unit
• LIF — Logical Interchange Format
• EMF — Event Management Framework
• ABR — Available Bandwidth Rate
• 100VG — 100 Voice Grade (IEEE 802.12 AnyLAN Standard)
• UMTS — Universal Mobile Telecommunications Service

• WNMS — Wireless Network Management System
• SCCS — Switching Control Center System
• VG — Voice Grade
• STP — Shielded Twisted Pairs
• SD — Speed Dial
• TSI — time-slot interchange
• FPLMTS — Future Public Land Mobile Telecommunications System
• LRQ — Location Request
• INTELSAT — International Telecommunications Satellite
• TCB — Telecommunication Certification Body
• FGD — Feature Group D
• CNID — Calling Number Identification Display
• NSEP — National Security Emergency Preparedness
• CLF — Carrier Line Failure
• EC — Equipment Controller
• ADCCP — Advanced Data Communication Control Procedures
• MCD — Community Care Access Centre
• 4WAI — Four-Wire Analog Interface
• IPNG — Internet Protocol, Next Generation (now called IPv6)
• AARQ — A-Associate Request
• CSLIP — Compressed SLIP
• GFI — General Format Identifier
• CLLM — Consolidated Link Layer Management
• DBN — Dial-Back Number
• DNA — Digital Network Architecture
• CRBT — Color Ring Back Tone
• ETSI — European Telecommunications Standards Institute
• TSB — Telecommunication Standardization Bureau
• P&A — Privacy and Authentication
• ATB — All Trunks Busy
• AIS-L — Alarm Indication Signal - Line
• TLC — Television the Learning Channel
• IMPI — IP (Internet Protocol) Multimedia Private Identity
• 4WE&M — Four-Wire Ear and Mouth
• COM — Comedy Central
• MIN — Mobile Identification Number
• WSP — Wireless Service Provider
• BUS — Business Units
• PMOS — P-channel Metal Oxide Semiconductor
• DDP — Datagram Delivery Protocol
• TWX — Teletypewriter Exchange Service
• EF&I — Engineering, Furnishing and Installation
• WAYP — White and Yellow Pages
• SAS — Special Access Surcharge
• SRA — Seamless Rate Adaptation
• AQP — Association for Quality and Participation
• ISD — International Subscriber Dialling
• TP-PMD — Twisted Pair Physical Medium Dependent
• SLIC — Subscriber Loop Interface Circuit
• DS-3 — Digital Signal, Level 3

• CCCI — Command, Control, Communications and Intelligence
• SLV — Satellite-Launch Vehicle
• DMNG — Digital Mobile News Gathering
• TAX — Trunk Automatic Exchange
• CNI — Calling Number Identification
• CAMEL — Customized Applications for Mobile-network Enhanced Logic
• KEK — Key Encrypting Key
• EVC — Electronic Voucher Charging
• ROSE — Remote Operations Service Element
• CSDU — Core Service Data Unit
• FRF-LMI — Frame Relay Forum - Local Management Interface
• AB — Answer Back
• DDS — Dataphone Digital Service (AT&T)
• ELFEXT — Equal-Level Far-End Cross-Talk
• ATB — Above-Ground Telecommunications Backbone
• ZBTSI — Zero Byte Time Slot Interchange
• MF — Multiple Frequency
• RAU — Remote Access Unit
• TP — Termination Point
• WSA — Wireless Security Auditor
• SGCP — Simple Gateway Control Protocol
• LDI — Long Distance Interconnect
• CTE — Computer Telephony Engineer
• LOB — Line Of Bearing/Balance
• SAP — Service Advertising Protocol
• NICAD — Nickel Cadmium
• DECT — Digital Enhanced Cordless Telecommunication
• CBWFQ — Class Based Weighted Fair Queueing
• CTTC — Centre Tecnològic de Telecomunicacions de Catalunya
• DBF — Digital Beam-Forming
• NANP — North American Numbering Plan
• VN — Virtual Network
• ETOM — Enhanced Telecom Operations Map
• DS — Delivery System
• UNO — Universal Network Operations
• VR — Virtual Router
• RBOC — Regional Bell Operating Company (Baby Bell)
• WTS — Wireless Telecommunications Symposium
• DE — Discard Eligible
• RWIN — Receive Window
• FMS — Fixed Mobile Substitution
• FECC-F — Forward Error Correction Count - Fast data
• CLASS — Custom Local Area Signaling Services
• SN — Stock Number
• WFT — Wireline Formation Test
• CTO — Commonwealth Telecommunications Organisation
• BASIZE — Buffer Allocation Size
• PGP — Pretty Good Protection (encryption)
• 3G — Third Generation (mobile communication system)
• ILD — International Long Distance

• EDSX — Electronic Digital Signal Cross-Connect
• DR — Design Review
• NEF — Network Element Function
• BPP — Billed Party Preference
• MRCA — Most Recent Common Ancestor
• DPT — Dial Pulse Terminate
• AL — Alignment
• SACS — Security Access Control System
• BB — Blackberry
• LPDP — Local Policy Decision Point
• SOHO — SOlar and Heliospheric Observatory
• BIS — Brought Into Service
• FNN — Full National Number
• XNS — Xerox Network Systems
• DTE — Digital Terminal Equipment
• ADPC — Automatic Data Processing Center
• E — Exchange
• FOD — Fax on Demand
• GOSIP — Government Open System Interconnection Profile
• LEED — Low-energy Electron Diffraction
• RDT — Recall Dial Tone
• TUP — Telephone User Part
• PIH — Pin in Hole
• LAPB — Link Access Protocol-Balanced
• BDSL — Broadband Digital Subscriber Line
• OTF — On-The-Fly (data acquisition method)
• WIN — Wireless Intelligent Network
• WDS — Wireless Distribution System
• BHCC — Busy Hour Call Completions
• CAPTAIN — Character And Pattern Telephone Access Information Network
• ADM 3X — DS3 Add-Drop Multiplex
• RLC — Reverse Link Channel
• SIM — Subscriber Identification Module
• CU — Cooling Unit
• GAN — Global Area Network
• AAP — Alternate Access Provider
• PSLV — Polar Satellite Launch Vehicle (Indian Space Research Organization; India)
• FGA — Feature Group A
• RS — Receive Signature
• ADC — Advanced Data Control
• GSM — Global System for Mobile telecommunications
• CS — Central Station
• ADF — Application Dedicated File
• SDSL — Symmetrical Digital Subscriber Line
• OCI — object code insertion
• CLCC — Ceramic Leaded Chip Carrier
• MA — Maintenance Action
• DTL — Defense Telephone Link
• O/G — Outgoing
• FLL — Fixed-Loss Loop

• RRC — Root Raised-Cosine
• DNC — Do Not Call
• BORSCHT — Battery feed, Overvoltage protection, Ringing, Signaling, Coding, Hybrid, and Testing
• FDI — Feeder Distribution Interface
• VTIR — visible and thermal infrared radiometer
• SN — Service Number
• ATIS — Alliance for Telecommunications Industry Solutions
• CCS — Common Channel Signaling
• CD — Committee Draft
• LOP-P — Loss Of Pointer - Path
• AGCH — Access Grant Channel
• RDSS — Radio Determination Satellite Service
• LB — Local Battery
• RTC — Real-Time Control
• B-ISDN — Broadband ISDN
• IRAC — Internal Review and Audit Compliance
• CIP — Channel Interface Processor
• ACL — Asynchronous Connection-less Link
• M — Memory
• ADIF — Accounting Data Interchange Format
• TD — Transmit Data
• ACM — Address Complete Message
• EM — Element Manager
• EADAS — Engineering and Administrative Data Acquisition System
• CT — Computer Terminal
• VFL — Visual Fault Locator
• FESS — Flywheel Energy Storage System
• RPCU — Radio Port Control Unit
• CFOT — Certified Fiber-Optic Technician
• TJB — Telephone Junction Box
• STN — Station Terrienne de Navire
• MH — Message Handler
• DAP — Distributed Array Processor
• MAPDU — Management Application Protocol Data Unit
• MEECN — Minimum Essential Emergency Communication Network
• ATMS — automatic transmission measuring system
• ATTRA — Appropriate Technology Transfer for Rural Areas
• MNOS — Metal-nitride-oxide Semiconductor
• ICL — Inserted Connection Loss
• TSC — Technical Standards Committee
• MSG — Management Steering Group
• ILETS — International Law Enforcement Telecommunications Seminar
• MP — Modulation Parameter
• AMC — Adds, Moves and Changes
• SMAS — Service Management System
• DRQ — Disengage Request
• AFCEA — Armed Forces Communications and Electronics Association's
• CDA — Communications Decency Act of 1996
• LFTYR — Ley Federal de Telecomunicaciones y Radiodifusión
• ULF — Ultra Low Frequency

• TEHO — Tail End Hop Off
• OMF — Object Management Framework
• CDVT — Cell Delay Variation Tolerance
• FXS — Foreign Exchange Subscriber
• SC — Switching Center
• PCN — Personal Communications Networks (European PCS)
• SMDR — station message detail recording
• VAR — Value-Added Reseller
• TRX — Tandem Repeater eXchange
• CTIA — Cellular Telecommunications Industry Association
• GOMP — Get Off My Phone
• DACS — Digital Access Cross-Connect Switch
• LRB — Loop Reverse Battery
• FCA — Fixed Channel Allocation
• FAC — Forced Authorization Code
• OSD — Onscreen Display
• CRS — Cell Relay Service
• CRL — Computing Research Laboratory
• FT1 — Fractional T1
• TARP — Target Identifier Address Resolution Protocol
• VO — Voice Only
• AOS — Alternate Operator Service
• PMT — Program Management Team
• RX — Receiver
• FLN — Fixed Line Network
• RCP — Right-Hand Circular Polarization
• VOB — Voice Over Broadband
• UAN — Universal Area Network
• CPN — calling party number
• NF — Noise Factor
• ALCAP — Access Link Control Application Protocol
• AOC — ADSL (Asynchronous Digital Subscriber LIne) Overhead Control channel
• PAGCH — Paging and Access Grant Channel
• DS-1 — Digital Signal, Level 1
• ET — Exchange Terminal
• WRT/R — Wireless Transmitter/Receiver
• CMA — Communications Management Association
• LULT — Line Unit/Line Termination
• AP — Action Point
• WBI — Wireless Broadband Internet
• WE — Western Electric
• VADB — Virtual Auto Dial Backup
• SSN — Switched Service Network
• TACS — Total Access Cellular System
• LS — Loop Start
• AAL2 — ATM (Asynchronous Transmission Mode) Adaptation Layer 2
• LBX — Low Bandwidth X
• ULL — Unbundled Local Loop
• SGSN — Serving GPRS (General Packet Radio Service) Support Node
• PTE — Path Terminating Equipment (SONET)

• B-CPE — Broadband Customer Premises Equipment
• CHT — Active
• CAM — Common Access Method
• DPDT — Double-Pole Double-Throw
• AAV — Alternative Access Vendor
• RAD — Recorded Announcement Device
• EC-N — Electrical Carrier (n=a number, e.g., EC-4)
• ASD — Alternative Service Delivery
• SMU — Service Management Unit
• LAP-B — Link Access Procedure - Balanced
• LLA — Link Level Access
• LCN — Local Communications Network
• TESMA — Telecommunications Equipment and Services Master Agreement
• RFR — Radio Frequency Radiation
• EECM — End-to-End Call Manager
• WIM — WAP (Wireless Application Protocol) Identity Module
• RSL — Remote Serial Link
• VDSL — Very high-speed Digital Subscriber Line
• DLT — Digital Line Termination
• JWP — Joint Working Party
• GCS — Global Communication System
• MPU — Main Processor Unit
• TSC — Test System Controller
• NSE — Network Software Environment
• CCS — Call Center Service
• QLLC — Qualified Logical Link Control
• ESM — electronic support measure
• TPF — Transmission Priority Field
• DTAP — Direct Transfer Application Process
• MOC — Ministry of Communications
• TWA — The Wireless Association (former Cellular Telecommunciations and Internet Association)
• WTNM — Working Telephone Number Management
• BSC — Bi-Synchronous Communications
• CDR — call detail recording
• VOB — Versioned Object Base
• ZLE — Zero-Latency Enterprise
• VHM — Voice Health Monitor
• COFA — Change Of Frame Alignment
• SN — Switching Network
• AIU — Analog Interface Unit
• SRU — Search and Rescue Unit
• MTS — Message Telecommunications Service
• BLP — Burst Loss Probability
• DNSIX — Defense Network Security Information Exchange
• NECA — National Exchange Carrier Association
• TOMS — Telecom Operations Management System
• FUD — Fair Use Doctrine
• PJC — Pointer Justification Count
• CCS — Common Command Set
• LCF — Location Confirm

• RJ-11 — Registered Jack type 11 (4-wire connector)
• ITCC — Information Technology and Communications Complex
• DCSS — Digital Cross-connect Systems
• HQGSM — High-Quality Global System for Mobile communications
• PROV — Provisioning
• IMTS — Improved Mobile Telephone Service
• EUMETSAT — European Meteorological Satellite
• UCS — Universityrsal Multiple-Octet Coded Character Set
• ET — Electronic Transmission
• NCF — Network Control Facility
• 4G — Fourth Generation
• ACRE — Authorization and Call Routing Equipment
• SMS — Service Management System
• TNI — Telephone Network Interface
• COC — Central Office Connection
• LMS — Location and Monitoring Service
• UCF — Unregistration Confirm
• ADM — Administration Building
• UPC — Usage Parameter Control
• CE — Channel Element
• NT — Network Termination
• ECSA — Exchange Carriers Standards Association
• GRUB — Greedy Reclamation of Unused Bandwidth
• DC — Device Control
• SMASE — Systems Management Application Service Element
• PD — Pulse Duration
• HPN — Home Phone Network
• MB — Measured Business
• ATU-R — ADSL (Asymmetric Digital Subscriber Line) Transceiver Unit - Remote terminal end
• TIMS — Telephone Information Management System
• FIC — Flight Information Center
• NFR — Near-Field Recording
• STMR — Sidetone Masking Rating (telecommunications)
• RXP — Roaming Exchange Protocol
• TSDU — Transport Service Data Unit
• RP — Radio Port
• WTA — Western Telecommunications Alliance
• OMP — Open Management Platform
• PVG — Personal Voice Greeting
• WVOIP — Wireless Voice over Internet Protocol
• DUL — Dial-Up List
• QPA — Quality Performance Analysis
• TTC — Telemetry Telecommand and Control
• THZ — TeraHertz
• TCL — Transverse Conversion Loss
• DDI — Direct Dialing Incoming
• ARQ — Admission Request
• ANAC — An Automatic Number Announcement Circuit
• NMF — Network Management Forum
• IDD — International Direct Dialing

• FMR — Follow Me Roaming
• DSCS — Defense Satellite Communication System
• WPC — Wireless Personal Communications
• EEROM — Electronically Erasable Read-Only Memory
• RSN — Readable Serial Number
• MEH — Mobile-Executed Handoff
• BSSMAP — Base Station System Management Application Part
• HSCSWD — High-Speed Circuit-SWitched Data
• IBSS — Independent Basic Service Set
• ACA — Adaptive Channel Allocation
• WLAP — Wireless LAN (Local Area Network) Access Point
• DSVD — Digital Simultaneous Voice and Data
• SOR — Statement of Requirements
• ESCON — Enterprise System Connection
• WDP — Wireless Datagram Protocol
• RICK — Repeater Interface Communications Kit
• CPOP — Circuit Precedence Over Packet data
• PTCL — Pakistan Telecommunication Company Ltd
• MSS — Mobile Satellite Service
• AMTFT — Active Matrix Thin Film Transistor
• INA — Information Network Architecture
• ASTE — Advanced Systems and Telecommunications Equipment
• RTU — Remote Test Unit
• WTA — Wireless Telephony Applications
• DACS — Digital Access Carrier System
• TPSP — Third Party Service Provider
• TFL — Telecom Fiji Limited
• COP — Character Oriented Protocol
• SCR — System Change Request
• C³ — Command, Control and Communications
• RTFM — Read The Friendly Manual
• CCITT — Comite Consultatif International Telegraphique et Telephonique (now ITU-T)
• LIDB — Line Information DataBase
• SHD — Smart Handheld Device
• BT — Burst Tolerance
• STARS — Software Technology For Adaptable, Reliable Systems
• ACF — Access Coordination Function
• WARP — Wireless ATM (Asynchronous Transmission Mode) Research Project
• AFPS — Automatic Facility Protection Switching
• TMTC — Telemetry and Telecommand
• CMTS — Cellular Mobile Telephone System
• PLE — Path Length Efficiency
• ANSI — Advanced Network Signaling Input
• SCORM — Shareable Content Object Reference Model
• DPDCH — Dedicated Physical Data Channel
• LCU — Lightweight Computer Unit
• NSN — National Significant Number
• CAL — Customer Access Line
• CAP — Competitive Access Provider
• SCC — Specialized Common Carrier

• AADS — Ameritech Advanced Data Services
• LCU — Line Control Unit
• EPL — Echo Path Loss
• NESC — National Electrical Safety Code
• BTP — Business Telecom Products, Inc.
• RNX — Restricted Numeric eXchange
• RCU — Radio Control Unit
• CBMS — Computer-Based Message System
• SSCP — System Services Control Point
• UDP — Up Down Pair
• CSTA — Computer Supported Telecommunications Applications
• AON — All-Optical Network
• ARDIS — Advanced Radio Data Information Service
• C/T — Carrier to Noise Temperature Ratio
• IATA — Intelligent Agents for Telecommunication Applications
• ATIS — Automatic Transmitter Identification System
• ACNA — Access Customer Name Abbreviation
• TI — Time
• PCCA — Portable Computer Communications Association
• GLT — Great Lakes Telecom
• BWX — Broadband Wireless Exchange
• AVT — Audio Visual Telecommunications
• WPBX — Wireless Private Branch Exchange
• BSS — Broadband Switching System
• TCIYP — Turks and Caicos Islands Yellow Pages
• APS — Advanced Power System
• SHM — Short-Haul Modem
• LSMS — Local Service Management System
• BSRF — Basic System Reference Frequency
• DOD — Direct Outward Dialing
• APPC — Advanced Program-to Program Communications
• QR — Quality record
• ROH — Receiver Off-Hook
• DTW — Dynamic Time Warping
• TCC — Transmission Control Code
• 2G — Second-generation mobile telephone system
• OMC — Operations and Maintenance Centre
• RLA — Received Level Average
• IDLC — Integrated Digital Loop Carrier
• CCEA — Cross Connect Equipment Assignment
• BAF — Bellcore AMA (Automatic Message Accounting) Format
• LEC — Liquid Encapsulated Czochralski
• DACS — Digital Access and Cross-Connect System
• DDSD — Delay Dial Start Dial
• NMC — Nortel Matra Cellular
• BPSK — Binary Phase-shift Keying
• CDM — Configuration Data Manager
• CPCI — Compact Peripheral Component Interconnect
• EMV — EuroPay, MasterCard, Visa
• DS-2 — Digital Signal, Level 2

• RCMAC — Recent Change Memory Administration Center
• EFD — Event Forwarding Discriminator
• IMT-2000 — International Mobile Telecommunications 2000
• SBX — Small Business Exchange
• SDP — Software Development Process
• SCU — Service Creation Unit
• CAN — Controller Area Network
• A/V — Audiovisual
• CM — Common Mode
• TNMS — Telecommunications Network Management System
• ETB — Empresa de Telecomunicaciones de Bogotá
• NQA — Niveau de Qualite Acceptable
• C — Connectivity
• ISSP — Interim Interswitch Signaling Protocol
• DCC — Digital Control Channel
• SSU — Synchronization Supply Unit
• TRAC — Totally Reconfigurable Analog Circuit
• DFT — Draft
• RCF — Remote Call Forwarding
• DPA — Distributed-Power Architecture
• CATI — Computer-Assisted Telephone Interviewing
• FLC — Forward Link Channel
• NARC — Non-Automatic Relay Center
• WTC — Wireless Topic Center
• WTL — Wireless Transport Layer
• TWC — The Weather Channel(r)
• UIT — Union Internationale des Télécommunications
• CMISE — Common Management Information Service Element
• ELSEC — Electronic Security
• BGP4 — Border Gateway Protocol 4
• WAWS — Washington Area Wideband System
• PVN — Private Virtual Network
• WDSL — Wireless Digital Subscriber Line
• DAVIC — Digital Audio Video Council
• WAL — WATS (Wide Area Telecommunications Service) Access Line
• NAM — Numeric Assignment Module
• WFG — Wireless Firewall Gateway
• QS — Quasi-Synchronous
• TPS — Telephone Preference Service
• PSDN — Public Switched Digital Network
• FR — Functional Requirement
• SHR — Self-Healing Ring
• DLE — Digital Local Exchange
• ECC — Extended Community Calling
• VAB — Vehicle Assembly Building
• ECS — Encryption Control Signal
• BAM — Basic Access Module
• PFE — Power Feed Equipment
• CRTS — Cellular Radio Telecommunications Service
• LMBCS — Lotus Mult-Byte Character Set

• RCT — remote Control Terminal
• NC — Network Channel
• PRE — Preliminary
• ARFA — Allied Radio Frequency Agency
• EDGE — Enhanced Data for GSM (Global System for Mobile communication) Evolution
• CSAC — Computer Science Accreditation Commission
• CCH — Common Channel Handler
• CLD — Cross-Layer Design
• FTAM — File Transfer Access and Manipulation
• FI — Format Identifier
• FC — Frame Control
• VTQ — Voice Transmission Quality
• WNAP — Wireless Network Access Point
• CSCC — coordinated state change control
• AWA — Advanced Wireless Access
• PVG — Packet Voice Gateway
• CVT — Circuit Validation Test
• CEPT — Conference of European Posts and Telecommunications
• RBT — Ring Back Tone
• MIS — Marketing Intelligence System
• LRF — Laser Range Finder
• ITU-T — International Telecommunication Union - Telecommunications section
• PHIGS — Programmer's Hierarchical Interactive Graphics System
• MDRAM — Multibank Dram
• VQA — Voice Quality Analyzer
• WISP — Wireless Internet Service Provider
• CPN — Customer Premise Network
• MVDS — Microwave Video Distribution System
• INSAT — Indian National Satellite
• VDSL — VHBR (Very High Bit Rate) Digital Subscriber Line
• FPS — Framing Pattern Sequence
• IDCU — Integrated Digital Carrier Unit
• NSDI — National Spatial Data Infrastructure
• VSC — Vertical Service Code
• MT — maintenance
• OC-96 — Optical Carrier Signal, Level 96
• RTB — Retransmission Buffer
• ANT — ADSL Network Terminator
• BCIX — Berlin Commercial Internet Exchange
• VMU — Virgin Mobile USA (mobile phone network)
• CCC — Clear Channel Capability
• LTU — Line Termination Unit
• PTN — Public Telephone Network
• KTF — Korea Telecom Freetel
• CMOS — Cellular Management Operation System
• LOF — Loss of Frame (ATM)
• ACTS — Automated Coin Toll System
• PNM — Pulse Number Modulation
• VPDN — Virtual Private Dial-up Network
• VTI — Vietnam Telecom International

• VNS — Virtual Network System
• LGE — Loop- or Ground-start Exchange
• WBA — Wireless Broadband Access
• AEIMP — Apple Event Interprocess Messaging Protocol
• ESG — Enhanced Service Gateway
• CWTS — China Wireless Telecommunication Standard
• T3 — Transmission service at the DS3 rate of 44.736 Mbps
• ATL — Advanced Technology Laboratory
• ICTA — Idaho Cable Telecommunications Association
• WFM — Wireless Frequency Modulation
• ESDS — Electrostatic Discharge Sensitive
• LWT — Listen While Talk
• MEI — Multiple Extension Interworking
• LADS — Local Area Data Service
• MITS — Metaphors for Integrated Telecommunications Services
• ERI — Enhanced Roaming Indicator
• AASR — Abbreviated Access Service Request
• TT — Text-Telephone
• VDR — Voice Digitization Rate
• IPCU — iPhone Configuration Utility
• LRM — Long Reach Multimode
• CALC — Customer Access Line Charge
• LVM — Line Verification Module
• DCS — Digital Cross-connect Switch
• IPXCP — Internetwork Packet Exchange Control Protocol
• DPBX — Digital Private Branch Exchange
• CAS — channel associated signaling
• MA — Message Analysis
• MC — Management Center
• SDCCH — Standalone Dedicated Control Channel
• HDB3 — High-Density Bipolar Three-bit substitution
• BT — Back Trace
• ITAD — Integrated Telephone Answering Device
• EGPRS — Enhanced General Packet Radio Service
• RFS — Resource Facing Service
• SAMS — Service Agreement Management System
• MQFP — Metric Quad Flat Pack
• QOV — Quality of Voice
• STAN — Supply of Telstra Account Number
• STD — Standard Deviation
• TCA — Threshold Crossing Alert
• ACMA — Atlantic Cable Maintenance Agreement
• DIL — Direct Inward Line
• 800 — Freephone
• CMAS — Cellular Management System
• IVN — Interactive Video Network
• RTC — Right to Carry
• DEO — Digital End Office
• WNAN — Wireless Neighborhood Area Network
• NMC — Network Model Coverage

• OA&M — Operations, Administration & Maintenance
• FOE — Fiber Optic Equipment
• BTU — Basic Transmission Unit
• DTR — Down-Time Ratio
• WDM — Windows Driver Model
• SAMA — Spread Aloha Multiple Access
• NRI — Net Radio Interface
• DECCO — DISA Defense Commercial Communications Office
• VSM — Voice Service Module
• WFA — Work Force Administration
• HDSL2 — High-bit-rate Digital Subscriber Line, Second Generation
• LRF — Location Registration Function
• USA — Underground Service Alert
• TRAI — Telecom Regulatory Authority of India
• GEO — Geostationary Earth Orbit
• SS — Switching System
• PRM — Performance Report Message
• DCEF — Distributed Cisco Express Forwarding
• MODEM — modulation and demodulation
• YIP — Your Internet Phone
• TDR — Time Domain Reflectometer
• VMWI — Voice Message Waiting Indicator
• DMTF — Desktop Management Task Force
• UDT — Unreliable Data Transfer
• TCM — Time Compression Multiplexer
• ENS — Enhanced Network Services
• ILF — Initial License Fee
• 888 — Freephone
• UOS — Units of Service
• EML — Element Management Layer
• CD-R — Compact Disk-Recordable
• AI — Airborne Interception
• SR — Scanning Radiometer
• XWI — XML (extensible markup language) for Wireless Images
• VCA — Voice Connecting Arrangement
• VTA — Vermont Telecommunications Authority
• M2M — Multipoint-to-Multipoint
• AMOLED — Active Matrix Organic Light-Emitting Diode
• SAA — Service Adaptive Access
• CIPOA — Classical Internet Protocol over ATM (Asynchronous Transfer Mode)
• DS-4 — Digital Signal Level 4
• PTN — Provider Telecommunications Network
• AFRINIC — African Network Information Centre
• WPOP — Wireless Point-of-Presence
• HBH — Hop-By-Hop
• ALI — Automatic Location Identifier
• ENUM — tElephone NUmber Mapping
• ROC — Receiver Operating Characteristic
• IRAC — Interdepartment Radio Advisory Committee
• CEPT — Committee of European Postal & Telephone (authorities)

• IRLAP — InfraRed Link Access Protocol
• ELEC — Enterprise Local Exchange Carrier
• CM — Connection Manager
• EM — Engineer(ing) Manual
• SNAP — Sub-Network Access Protocol
• RTT — Roof Top Tower
• PDSO — Packet Data Security Overlay
• IR — International Roaming
• VQT — Voice Quality Testing
• VOFR — Voice Over Frame Relay
• ADTM — Asynchronous Data Transfer Mode
• VSAT — Very Small-Aperture Terminal
• ADTS — Ameritech Digital Transport Service
• LOH — Line Overhead
• SCRC — SCCP Routing Control
• CEE — Communaut? Economique Europ?enne
• VVP — Versatile Voice Processing
• IOT — Interoffice Trunk
• BEAR — Billed Entity Applicant Reimbursement
• CLOS — Clear Line Of Sight
• N-AMPS — Narrowband Advanced Mobile Phone Service
• OID — Object Interaction Diagram
• SM — Spectrum Management
• CSP — Continuous Speech Processing
• CCP — Compression Control Protocol
• BS — Busy Season
• LAT — Local Area Transport (network)
• EDT — European Deaf Telephone
• VLF — Vertical-Laminar-Flow
• SPU — Service Publication Unit
• UAC — Uniform Annual Charge
• SVW — Sioux Valley Wireless
• DOITT — Department of Information Technology and Telecommunications
• STE — Software Test Environment
• PTT — Post, Telephone, and Telegraph (authority)
• CID — Craft Interface Device
• FD — Full Duplex
• DLCS — Digital Loop Carrier System
• TSMA — Telecommunications Services Master Agreement
• OIM — Operations Interface Module
• EOT — Eastern Oregon Telecom
• WMA — Wireless Messaging API (Application Programming Interface)
• NMAS — Network Management System
• ISTD — International Subscriber Trunk Dialing
• INWATS — INward Wide Area Telecommunications Service
• EC — Enhanced Cellular
• TI — Time Integration
• WAPI — Wireless LAN Authentication and Privacy Infrastructure
• HCV — High Capacity Voice
• FRSS — Frame Relay Switching System

• ABATS — Automatic Bit Access Test System
• FEAC — Far End Alarm and Control
• D-AMPS — Digital Advanced Mobile Phone Service
• RA — Requirements Analysis
• MDCP — Media Device Control Protocol
• DTAM — Document Transfer and Manipulation
• WLAB — Wireless LAN (Local Area Network) Access Bridge
• ITOC — Independent Telephone Operating Company
• DORK — Disciples Of The Righteous King
• JEDEC — Joint Electronic Devices Engineering Council
• WAGN — West Antarctic GPS (Global Positioning System) Network
• AAPR — Annual Average Performance Ratio
• ML-PPP — Multilink Point-to-Point Protocol
• ADAD — Automatic Dialing Announcing Device
• LI — Length Indicator
• LMU — Line Monitor Unit
• PSQM — Perceptual Speech Quality Measure
• TASI — Time Assigned Speech Interpolation
• MNA — Multi-Network Area
• UCS — Unified Communication Service
• CNAD — Calling Name Delivery
• USD — Universal Service Directive
• CCSS6 — Common Channel Signaling System # 6
• WDMW — Web Directory for Mobile and Wireless
• WNA — Wireless Network Adapter
• ICSF — Internet Connection Sharing and Firewall
• DCU — Distribution and Control Unit
• PMD — Physical Media-Dependent
• CSAP — Core Service Access Point
• FEBE-F — Far End Block Error count - Fast data
• UBC — Utility Based Computing
• RID — Routing Identifier
• LZ — Lempel-Ziv compression algorithm
• MCR — Minimum Cell Rate (ATM)
• STN — Stansted Airport railway station
• LCT — Large Capacity Tandom
• TWL — Leased Teletypewriter Service
• IC-POT — Interexchange Carrier-Point of Termination
• 3WC — Three Way calling
• WAPF — Wireless Application Protocol Forum
• FOTS — Fiber Optical Transmission System
• FECC-I — Forward Error Correction Count - Interleaved data
• QPM — QoS (Quality of Service) Policy Manager
• ESSE — Embedded Systems Software Environment
• ULP — Upper Layer Protocol
• WAVE — Wide Area Voice Exchange
• SMLC — Serving Mobile Location Center
• SC — Standards Committee
• AAS — Automatic Announcement Subsystem
• RFH — Remote Frame Handler

• MMJ — Modified Modular Jack
• WDCS — Wireless Distributed Communication System
• ASA — Avaya Site Administration
• NMS — NetWare Management System
• LVDS — Low-Voltage Differential Signalling
• PSDS — Packet Switched Data Service
• CSAA — Central Service Area Authority
• WPKI — Wireless Public Key Infrastructure
• AA — Auto-Answer
• TEM — Telecommunications Expense Management
• WOIP — Wireless communications over Internet Protocol
• DTS — Digital Terminal Systems
• CASE — Computer-Assisted Software Engineering
• WPOS — Wideband Packet over SONET (Synchronous Optical NETwork)
• AEE — Agent Execution Environment
• FTTE — Fiber to the telecom enclosure
• HUMAN — High-speed Unlicensed Metropolitan Area Network
• SJR — Signal-to-Jamming Ratio
• MFA — Multi-Frame Alignment
• CIU — Communications Interface Unit
• AI — Adapter Interface
• RCR — Research and Development Center for Radio Systems
• SF — Superframe
• PSPDN — Packet Switched Public Data Network
• TAU — Test Access Unit
• VMO — Virtual Mobile Operator
• FR-SSCS — Frame Relay Service Specific Convergence Sub-Layer
• ICAL — Interexchange Carrier Access Line
• CFNA — Call Forwarding No Answer
• USF — Universal Server Farm
• 3RNGR — Three Ringer
• UI — Unnumbered Information (frame)
• 802.X — Series of LAN standards developed by IEEE
• IMT-A — International Mobile Telecommunications - Advanced
• WAVE — Wireless Access in Vehicular Environments
• PI — Processor Interface
• CCBS — Completion of Call to Busy Subscriber
• IVP — Integrated Voice Protocol
• SWIFT — Society Of Worldwide Interbank Financial Telecommunications
• SES — Scientific and Engineering Software
• DQDB — Distributed Queue Double Bus
• MHD — Maximum Hour Demand
• MOC — Maintenance and Operations Console
• BMAS — Business Management System
• DRTT — Dial Repeating Tie Trunk
• VDT — Video Dial Tone
• TRCSL — Telecommunications Regulatory Commission of Sri Lanka
• NF — Not Found
• IDSL — ISDN (Integrated Services Digital Network) Digital Subscriber Line
• RDF — Remote Distribution Frame

• IDPR — Interdomain Policy Routing
• TFO — Tandem Free Operation
• STEREO — Solar Terrestrial Relations Observatory
• MTBM — Mean Time Between Maintenances
• UR — User Rate
• IOC — Interoffice Channel
• ATACS — Army Tactical Communications System
• ALIS — Access Lines in Service
• PSN — Packet-Switched Network
• HPPI — High-Performance Parallel Interface
• QOD — Quality of Data
• ISSIP — Inter-Switching System Interface Protocol
• AMTI — Airborne Moving Target Indicator
• SMRP — Simple Multicast Routing Protocol
• SNI — Service Node Interface
• DDSN — Digital Derived Services Network
• ULC — Universal Line Card
• WDP — Wireless Data Pool
• WBTS — Wireless Business Telephone System
• CMAP — Connection Management Access Protocol
• SAMI — Structured Adjustment & Maintenance Interface
• ISDP — Intelligent Shared Dual Path
• BFS — Broadcast File System
• EA — expedited acknowledgement
• ERM — Explicit Rate Marketing
• E-TDMA — Expanded Time Division Multiple Access
• ADTS — Automated Digital Terminal System
• MBAC — Measurement-Based Admission Control
• SPNI — Service Provider Network Identifier
• TMOD — Telecommunications and Mission Operations Directorate
• PC — Project Coordinator
• UIF — User Interface Framework
• WIVO — WIreless VelOcity
• RCH — Receive Channel
• SCMG — SCCP Management
• NR — Nummer
• TP — Telephone Pole
• USOC — Universal Service Order Code (cable colors)
• B-ISUP — Broadband ISDN User Part
• TLM — Trouble Locating Manual
• BTO — Betts Telecom Oklahoma
• D4 — Digital channel bank, Fourth generation
• WAW — Wide Area Wireless
• QOSOI — Quality Of Service Over IP (Internet Protocol)
• DSX — Digital Signal Cross-Connect
• LTU — Line Test Unit
• CARS — Community Antenna Relay Service
• DRTL — Dial Repeating Tie Line
• DS0 — Digital Signal Zero
• CARS — Cable Antenna Relay Services

• VPL — Virtual Path Link (ATM)
• SPI — Security Parameters Index
• OPS/INE — Operations System/Intelligent Network Element
• DISA — Direct Inward Switch Access
• ETT — Emerging Telecommunications Technologies
• LLB — Line LoopBack
• WCA — Wireless Cable Association International
• UDC — Universal Digital Channel
• IPN — Intelligent Peripheral Node
• GS — Ground Start
• WIRC — Wireless Information Resource Center
• ISP — International Signaling Point
• WIPS — Wireless Intelligent Personal Server
• NSM — Network Status Monitor
• LXT — Local Exchange Terminal
• WPMS — Wireless Protocol Management System
• RDTD — Restricted Differential Time Delay
• ITFS — International Toll Free Services
• XNS — Xerox Network System
• WSF — Workstation Function
• WACN — Wide Area Communications Network
• NETS — Nationwide Emergency Telecommunications Service
• RTZ — Rate for Transmission service for a Zone load
• PCIA — Personal Communications Industry Association
• DMS — Distribution Management System
• NCOS — Network Class Of Service
• SPCS — Stored Program Control System
• QQS — QOS (Quality Of Service) Query Service
• EXCL — Exclusive
• UVG — Universal Voice Grade
• ISDNUP — Integrated Services Digital Network User Part
• WEDE — Wireless Enterprise Delivery Environment
• CAS — Customer Accounts Service
• TADS — Target Acquisition Designation Sight
• USPI — Universal Serial Phone Interface
• DLE — Digital Line Equipment
• CALA — Customer Address Location Area
• TRANS — Transaction
• VGCP — Voice Grade Channel Processor
• RZ — Return to Zero
• WSL — Wireless Systems Laboratory
• SQR — Signal to Quantizing noise Ratio
• IR — Information Request
• HTO — Hellenic Telecommunications Organisation
• MNOC — Mobile Network Operation Center
• VNT — Very Nice Telephone
• INAP — Intelligent Network Application Part
• EC — Entropy Coding
• GVPN — Global Virtual Private Network
• BASH — Bandwidth Sharing

• NBS — New British Standard
• CODEC — Coder-Decoder (usually for audio/video data)
• ETS — End of Transmission Signal
• MEAS — Measurement Specialties, Inc.
• NBDP — Narrow Band Direct Printing
• VGC — Voice Grade Channel
• URR — UHF (Ultra-High Frequency) Radio Receiver
• RYP — Russian Yellow Pages
• WBOK — Wireless Broadband of Oklahoma
• TBI — Telecom Brokerage Inc
• STUN — Simple Traversal of UDP (User Datagram Protocol) through NAT (Network Address Translation)
• DM — delta modulation
• ALT — Automatic Link Transfer
• S-HTTP — Service Hypertext Transport Protocol
• SLICE — Selective Line Insertion Communication Equipment
• IPCDN — IP over Cable Data Networks
• WITS — Washington Interagency Telecommunications System
• AMEL — Active-matrix Electroluminescent
• V — Vector
• ACEK — Authentication Encryption Key
• CELL — Caller Enabled Leased Line
• TCBH — Time Consistency Busy Hours
• BBCR — BroadBand Communications Research
• ITA — Illinois Telecommunications Association
• QEDI — Quod Erat Demonstrandum
• MMMS — Mobile Multimedia Messaging Service
• LQD — Line Quality Disturbance
• CLIP — Caller Line Identification Presentation
• AAR — Automatic Alternate Routing
• NML — Network Management Layer
• SMDS — Switched Multi-megabit Data Service
• BC — Basic Call
• IMT-FT — International Mobile Telecommunications - Frequency Time
• FHMA — Frequency Hopping Multiple Access
• AFIPS — American Federation of Information Processing Societies
• TXS — Telephone eXchange Strowger
• OOR — Operator Override
• BTE — Broadband Terminal Equipment
• VOX — Voice Operated Transmission
• TACSIM — Tactical Simulation (Simulator)
• RANAP — Radio Access Network Application Part
• SS6 — Signalling System 6
• INPT — Institut National des Postes et Télécommunications
• FCCSET — Federal Coordinating Committee for Science, Engineering and Technology
• OC-48 — Optical Carrier Signal, Level 48
• SWN — Statewide Wireless Network
• LGS — Loop- or Ground-start Subscriber
• VASP — Value-Added Service Provider
• IMPCS — Indian Mobile Personal Communication System
• TME — Telocator Message Entry

• FACS — Facility Assignment and Control System
• IAST — Industry Access Service Tariff
• TLP — Transmission Level Point
• ENST — Ecole Nationale Supérieure des Télécommunications
• DCID — Downstream Channel ID
• PRM — Premium Rate
• COMPANDER — COMpressor/exPANDER
• UPS — Un-interruptable Power Supply
• VPM — Voice Private Message
• MOA — Managed Object Agent
• BDFB — Battery Distribution Feeder Bay
• TSAR — Terminating Switched Access Rate
• OLEC — Other Local Exchange Carrier
• CCSD — Cellular Circuit Switched Data
• ONE — Other Network Entity
• DNR — Dial Number Recorder
• WSN — Wireless Sensor Network
• LRN — Local Routing Number
• MTS — Message Transmission Subsystem
• SLTS — Sri Lanka Telecom Services
• ESA — Enhanced Subscriber Authentication
• COI — Community of Interest
• T3 — 44.736 Mbits per Second line
• ITEC — Internet Telecom and Electronic Commerce
• KBS — Kilobits per Second
• ZD — Ziff-Davis
• ETET — Electrical and Telecommunications Engineering Technology
• TTG — Test Tone Generator
• COBE — Corporate Owned Business Only
• TD-SCDMA — Time-division Synchronous Code-division Multiple Access
• TDB — Technology Development Board
• QNC — Quick Net Connect
• CDSL — Consumer Digital Subscriber Line
• RCQS — Roaming Call Quality Sensor
• CFS — Customer Facing Services
• CF — Coin First Payphone
• WDRM — Wireless Design Reference Manual
• DMI — Digital Multiplex Interface
• WGX — Wireless Gateway Switch
• ATSC — Australian Telecommunications Standardization Committee
• KTA — Kentucky Telecom Association
• STN — Station Terrestre de Navire
• ECR — Enhanced Call Routing
• STU — Signal Transmission Unit
• IDEN — Integrated Dispatch Enhanced Network
• GATE — GPRS (General Packet Radio Service) Application Test Environment
• LQR — Line Quality Report
• TIF — Telecommunications Infrastructure Fund
• FCT — Fixed Cellular Terminal
• ICCF — Interexchange Carrier Compatibility Forum

• MIS — Miscellaneous
• PNE — Path Number Efficiency
• NSPE — National Society of Professional Engineers
• AWCC — Afghan Wireless Communications Company
• PTT — Post Telegraph and Telecommunications
• SCE — Service Creation Environment
• TMF — Telemanagement Forum
• EVRC — Enhanced Variable Rate CODEC (CODer-DECoder)
• CAIRO — Communications Audio Interface for Remote Operations
• DAF — Directory Access Function
• CSR — Customer Service Report
• MCPC — Multiple Channels Per Carrier
• DFT — Draft Tax Forms
• UDS — Universal Directory Service
• NSP — National Signaling Point
• MCD — Mobile Communications Division
• BPOP — Building Point of Presence
• W-CDMA — Wideband Code-Division Multiple-Access
• D/A — Digital-to-Analog converter
• AUSPI — Association of Unified Telecom Service Providers of India
• SSP — Security Service Provider
• ONI — Operator Number Identification
• AS — Active Service
• ATL — Atlanta
• PSX — Power System Exchange
• TPB — Talking Phone Book
• CTIT — College of Telecommunications and Information Technology
• DTV — Digital Television
• WLNP — Wireless Local Number Portability
• CR — Connection Request
• ASIC — Application Specific Instruction Code
• CCIR — Comittee Consultatif International Radiotelecommunique
• CITR — Canadian Institute for Telecommunications Research
• EOI — End of Image
• CLASS — Cell Level ATM (Asynchronous Transfer Mode) Services Simulator
• LDB — Last Data Bit
• TI — Telecom Implementation
• RDI-L — Remote Defect Indicator - Loop
• ARJ — Admission Reject
• DBRN — deciBel Relative to Noise
• TSGR — Transport System Generic Requirements
• GPBX — Global Private Branch eXchange
• VDV — Voice/Data/Video
• TWX — Teletypewriter Exchange (Telex)
• ABTA — Associação Brasileira de Telecomunicações por Assinatura
• DMPB — Digital Multi-Point Bridging
• YAC — Yet Another Caller-ID program
• CDB — Configuration Data Base
• ARAI — Adjunct Route Application Interface
• CSV — Circuit Switched Voice

• SNI — Subscriber-Network Interface
• IO — Inter-Office
• MVD — Motion Vector Data
• BP — Block Parity
• ICLD — Inter-Channel Level Difference
• FDMMA — Frequency Division Multiplexing Multiple Access
• TSP — Telecom Service Provider
• RFIDAI — Radio Frequency IDentification Association of India
• SQL — Specified Quality Level
• T&R — Tip and Ring
• MMDX — Multi-Media Data Services
• DUC — Designated Underlying Carrier
• WNSK — Wireless Networking Starter Kit
• RSS — Received Signal Strength
• ADTS-E — Ameritech Digital Transport Service - Enhanced
• SHN — Self-Healing Network
• RSU — Remote Switching Unit
• MMDS — Multichannel Multipoint Distribution System
• AC — Absorption Coefficient
• MLHG — Multi-Line Hunt Group
• S&F — Store & Forward
• SSTC — Subsystem Status Test Control
• ECAN — Echo Cancellation
• AT — Attenuation
• AGPS — Assisted Global Positioning System
• RU — Release Unit
• DCB — Digital Channel Bank (Sprint)
• DCC — Data Communications Channel
• WQOS — Wireless Quality of Service
• FWT — Fixed Wireless Terminal
• PRCS — Philips Radio Communications Systems
• ESG — Error Satellite Gauge
• DTF — Digital Transmission Facility
• REGEN — Regenerator
• WTK — Wireless Toolkit
• RSL — Request and Status Links
• CT — Cordless Telecommunications
• QC — Quality Circle
• BTL — Bell Telephone Laboratories, Inc.
• IPT — Internet Protocol Telephony
• UIT — Union Internationale des Telecommunications
• D3 — Digital channel bank, Third generation
• LQN — Line Quality Network
• HTU-R — HDSL (High-bit-rate Digital Subscriber Line) Transmission Unit - Remote
• JTU — Japan Telephone Upgrade
• UCD — Uniform Call Distributor
• SIU — Subscriber Interface Unit
• UBL — Universal Bluetooth Link
• 3WO — Third Wire Open
• OC-1 — Optical Carrier Signal, Level 1

• OC-3 — Optical Carrier Signal, Level 3
• TSD — Type Specific Driver
• H11 — High-capacity ISDN channel operating at 1.536 Mbps
• LBA — Location-Based Advertising
• SKT — Sun Kyung Telecom
• MAPP — Mobile Access Personal Presence
• SPCS — Stored Program Control Switch
• ISM — Interstellar Medium
• NARSAP — National Advanced Remote Sensing Application Program
• WDA — Wireless Developer Agency
• SU — super-user
• IPTD — Internet Protocol Telephony Design
• WCMP — Wireless Control Message Protocol
• KB — Knowledge-Based
• BHP — Burst Header Packet
• JDC — Japan Digital Cellular
• TELECOM — Telecommunications
• D/I — Drop and Insert
• CTS — Call Tracking System
• TWSS — Telecom Web Services Server
• CDF — Communications Data Field
• EA — Emergency Action(s)
• WTDC 98 — World Telecom Development Conference 1998
• WTA — Wireless Telephony Application
• AAC — Alternate Area Code
• PTK — Post and Telecom of Kosovo
• AVD — Alternate Voice/Data
• SSS — Subscriber Switching Subsystem
• SWAT — Sit, Wait, and Talk
• DCU — Drum Control Unit
• DCP — Distributed Collaborative Planning
• MAHO — Mobile Assisted Handoff
• FWS — Fixed Wireless Services
• ATR — Advanced Telecommunications Research Institute
• HSUPA — High-Speed Uplink Packet Access
• SVGA — Super VGA
• HKT — Hong Kong Telecommunications Ltd.
• MHL — Mobile High-definition Link
• SIO — Service Information Octet
• CC — Composite Clock (SONET)
• SAR-PDU — Segmentation And Reassembly Protocol Data Unit
• HDT — Host Digital Terminal
• SLS — Sidelobe Suppression
• PSC — Picture Start Code
• JSR — Jump to Subroutine
• SCSA — Standard Consolidated Statistical Area
• NPSI — Network Packet Switching Interface
• MIDP — Mobile Information Device Protocol
• MMS — Multimedia Message Service
• CONS — Connection-oriented Network Services

• DECT — Digital Enhance Cordless Telecommunications
• DPCM — Differential Pulse Code Modulator
• UASL — Unified Access Service License
• CANARIE — Canadian Network for Advancement of Research, Industry, Education
• UPCU — Uplink Power Control Unit
• MDU — Monthly Domestic Usage
• FEBE-I — Far End Block Error count - Interleaved data
• CPS — Carrier Pre-Selection Service
• MCF — Message Confirmation Frame
• MES — Master Earth Station
• IMTC — International Multimedia Telecommunication Consortium
• ACS — Accelerated Change Service
• BEP — Back-End Processor
• LATA — Local Access Transport Area
• APTG — Asia Pacific Telecom Group
• MVDM — Multiple Virtual DOS Machine
• UPC — Universal Personal Communication
• ACR — Anonymous Call Rejection
• LUL — Land Use Line
• TSAP — Telecommunication Systems Analysis Position
• DOD — Dial on Demand
• UNICODE — UNIversal trunk - out-of-service CODE
• DMP — Decode Media Protocol
• TTGS — Test Tone Generator Software
• VOX — Voice Exchange
• LME — Line Monitoring Equipment
• LO — Lockout
• SVC — Single Voice Coil
• TSAU — Time Slot Access Unit
• DM — Design Manager
• VOF — Voice Over Fiber
• UBI — Usage Billing Information
• ITTP — Information Technology And Telecommunications Policy
• DS-4 — Digital Stream 4 (274.016 mbps)
• CSL — component sublayer
• WAR — Wireless Access Revolution
• PTN — Portable Telephone Network
• WNL — Wireless Networks Laboratory
• JYP — Jamaican Yellow Pages
• ACA — Automatic Circuit Assurance
• PTAM — Professional Telephone Answering Machine
• CFA — Carrier Failure Alarm
• SMDS — Satellite Multimedia Delivery System
• ESL — Educational Sales Ledger
• PLM — Product Line Manager
• GTB — Global Telecoms Business
• APS — American Protective Services
• IRB — Instruction Reorder Buffer
• SUF — Service Update Facility
• LSAP — Link Layer Service Access Point

• DTC — Department of Telecommunications and Cable
• VON — Voice Over Network
• RAT — Radio Access Technologies
• TSS — Telecommunication Standards Sector
• SPT — System Page Table
• LAP-B — Link Access Protocol-Balanced
• TAE — Terminal Adapter Equipment
• NCP — Network Control Point
• NFF — Neutral File Format
• Q3 — Network Management Interface
• BFW — Broadband Fixed Wireless
• VRC — Virtual Redundancy Check
• IOCDS — Input/Output Configuration Data Set
• L4 — Layer 4
• MSSC — Mobile Satellite Switching Centre
• CIS — Communications and Information Systems
• MBA — Masters in Business Administration
• TRK — Trunk
• WITS — Web Interface for Telescience
• DIAG — Diagnostics
• P — Point
• SARTS — Switched Access Remote Test System
• VMB — Voice Mail Box
• CCC — Credit Card Calling
• PM — Processable Mode
• WIPI — Wireless Internet Platform for Interoperability
• WVI — Wireless Vehicle Interface
• VCR — Videocassette Recorder
• CGT — Consultants Group for Telecommunications
• GETS — The Government Emergency Telecommunications Service
• C-M — Control-Monitor
• RBS — Robbed Bit Signaling
• RDI-V — Remote Defect Indicator - Virtual
• FRAD — Frame Relay Assembler/Disassembler
• DODD — Department Of Defense Directive
• MNP — Microcomputer Networking Protocol
• SE — Southeast Euro
• PCMCIA — Personal Computer Memory Card Industry Association
• M-M — Multiplex-Multicast
• SRTS — Synchronous Residual Time Stamp
• TTIL — Team Telecom International Ltd.
• MC-SS — Multi-Carrier Spread Spectrum
• CUSA — Central Urban Service Area
• BETRS — Basic Exchange Telecommunications Radio Service
• IWU — Interworking Unit
• UDLC — Universal Digital Loop Carrier
• MFJ — Modified Final Judgement
• GSMA — Global System Mobile Association
• DS-1C — Digital Signal, Level 1C
• DVC — Digital Video Compression

• VINF — Vista INformation Solution
• DH — Delivery Head
• TSR — Terabit Switch/Router
• WOS — Wireless Optimization Service
• CCC — CDMA Cluster Controller
• MFAS — Multi-Frame Alignment Signal
• SIGTRAN — Signaling Transport
• WIWT — Wireless Internet of West Tennessee
• EFRC — Enhanced Full Rate Codec
• DSVT — Digital, Secure Voice Telephone
• BU — Back Up
• TXD — Transmit Data
• ESMT — Ecole Superieure Multinationale Des Telecommunications
• BIT — Bureau of Information and Telecommunications
• ACVS — Ameritech Customized Video Service
• MSO — Marine Safety Office(r)
• WUP — Wired Up Privacy
• PDE — Positioning Determination Entity
• SUBT — Subscriber Terminal
• DFRI — Datacom Reference Frame Input
• RIC — Radiocommunications Information Circular
• CCTA — Cctacentral Computer And Telecommunications Agency
• SMSL — Standard Multimedia Scripting Language
• UTP — Universal Transmission Protocol
• ETC — Enhanced Telecommunications Corporation
• TIMS — Transmission Impairment Measurement System
• APR — Alarm Processing Remote
• CIS — Center for Integrated Systems
• DS-2 — Digital Stream 2 (6.312 mbps)
• WIG — Wireless Internet Gateway
• UMS — Unified Messaging Service
• ROPP — Receiver Only Packet Pair
• DUNCE — Dial-Up Networking Connection Enhancement
• OMP — Operations and Management Platform
• DLOL — Digital Loss Of Link
• EVN — Enterprise VoIP (Voice-over-IP) Network
• VM — Voice Messaging
• WDF — Wireless Data Forum
• PPCH — Packet Paging Channel
• CTIE — Centre for Telecommunications and Information Engineering (Monash University; Australia)
• GT&T — Guyana Telephone and Telegraph Company
• CTN — Corporate Telecommunication Networks
• NR — normal
• TCCL — Terminating Carrier Command Line
• SVI — Service Interception
• LLAR — Local Loop Access Ring
• LET — Line Equipment Transfer
• WECA — Wireless Ethernet Compatibility Alliance
• WFFQ — Wireless Fluid Fair Queueing
• TBPS — terabit per second

• IPC — Initial Paging Channel
• DTAU — Digital Test Access Unit
• D/U — Delay Unit
• TSM — Transaction State Machine
• CMT — Commercial Metering Transponder
• MIC — Management Integration Consortium
• MAP — Mobile Applications Port
• IDC — Information Distribution Company
• CNT — Corporacion Nacional de Telecomunicaciones
• DLC — Digital Leased Circuit
• DLI — Dialed Line Identification
• MEOS — Medium Earth Orbit Satellite
• CIL — Call Identification Line
• DVI — Digital Video Interleaved
• BNT — Broadband Networking Technology
• IU — Internal Use
• RFI — Remote File Inquiry
• WNVA — wireless Network Vicinity Assessment
• DSP — Domain Specific Part
• PR — Preference
• LPU — Line Protection Unit
• LDL — Long Distance Link
• MP — Master Processor
• WTNG — World Telephone Numbering Guide
• ILETS — Idaho Law Enforcement Telecommunication System
• RTNR — Real-Time Network Routing
• VRT — Voltage Reduction Technology
• ML — maximum length
• LAC — Line Assignment Center
• HIC — Head-End Interface Converter
• FSM — Field Service Manager
• WCRL — Wireless Communications Research Laboratory
• SPN — Service Panel Number
• XOT — X.25 Over TCP (Transmission Control Protocol)
• DWB — Designer's Workbench
• DAMPS — Digital Advanced Mobile Phone System
• PWT — Personal Wireless Telecommunication
• SEM — Sionscanning Electron Microscopy
• QLC — Quality Com
• WTDC 2003 — World Telecom Development Conference 2003
• QSK — Quadrature Shift Keying
• DVCC — Digital Verification Color Code
• HCDS — High Capacity Digital Services
• ECA — Extended Calling Area
• BANC — Broadband Access Network Coordination
• TEO — Telephone Equipment Order
• ACL — Average Call Length
• CDRM — Cross-Domain Resource Manager
• WTDM — Wideband Time Division Multiplexing
• PTO — Public Telephone Operator

• AC — Always Connected
• WISI — Wireless Integrated Strike Interface
• TSPS — Traffic Service Position System
• WCS — Wireless Communications Service
• BRTL — Blu-Ray Triple Layer
• TU — Total Usage
• DCCH — Digital Control Channel
• RCDD — Registered Communications Distribution Designer
• DCD — Data Carrier Detect
• ITSP — Internet Telephone Service Provider
• TVR — Telephone Voice Response
• DDCZ — Daily Demand Charge for a Zone
• PPV — Pay-Per-View
• CUG — Closed Users Group
• RAMA — Resource Auction Multiple Access
• ICC — Interexchange Carrier Charge
• SLTE — Signaling Link Termination Equipment
• MBA — Message Body Authenticator
• DMF — Distributed Messaging Fabric
• HIP — Holes In Phonebooks
• VF0 — Voice Fundamental Frequency
• UIH — Unnumbered Information with Header check
• TRAN — Transient
• NSSG — Network Solutions and Service Group
• RWF — Roaming Wireless Framework
• IOCA — Interception of Communications Act
• RPV — Resource Property Value
• WRU — Wireless Receiver Unit
• YBY — Why Be Yellow
• IUC — Interconnect Usage Charge
• IVW — InfoView Wireless
• VRS — Video Relay Service
• NACSIM — National Communications Security Information Memorandum
• MOD — Modulo
• C/R — Control/Response indication bit
• WAP — Web Access Phone
• WTPF 3 — World Telecommunication Policy Forum 3
• ESP — Essential Service Protection
• CPC — Crosstalk Prevention Coding
• ECITTC — European Committee for Information Technology Testing and Certification
• C — Clock
• WICS — Wireless Integrated Communication System
• RSI — Record Status Indicator
• DDCNZ — Daily Demand Charge for Non-Zone Network Load
• UBT — Universal Backend Tester
• ACOU — Additional Call Offering Unrestricted
• ECC — Emergency Communications Center
• MTIE — Maximum Time Interval Error
• B911 — Basic 911 Emergency Service
• LTP — Long Term Prediction

• SGW — Server GateWay
• CASP — Communications Application Service Provider
• E&M — Earth and Magneto (signaling leads)
• SLM — Subscriber Loop Multiplex
• WLS — Wireless Location Services
• OTF — Optical Transfer Function
• ECMA — European Community Manufacturers Association
• SGS — Software Generation System
• UGC — UnderGround Communications
• WIAS — Wholesale Internet Access Services
• THL — Trans-Hybrid Loss
• DNA — Do Not Answer
• WWA — Wireless Web Application
• RCV — ReCharge Voucher
• SSS — System/segment Specification
• TOH — Transport Overhead
• MJU — Modular Jack Unit
• MID — Maritime Identification Digits
• BISDN — Broadband Integrated Services Digital Network
• NATA — North American Telecommunications Allocation
• OMNCS — Office of the Manager, National Communications System
• SS5 — Signalling System 5 (2400/2600 Hz tones)
• EV-DV — EVolution Data/Voice
• PRAM — Parameter RAM
• TBRL — Terminal Balance Return Loss
• TOT — Time Of Transmission
• VRR — Videoconferencing Reservation Request
• COB — Change Of Billing
• AS56 — Access System Centum 56 series
• MLMS — Mobile Learning Management System
• WN — Wireless Network
• VTE — Virtual Test Environment
• BSM — Broadband Satellite Multimedia
• WFII — Wireless Facilities Information Infrastructure
• NEBS — New Equipment Building Specifications
• SRVT — SCCP Routing Verification Test
• SLC — Service Level Contract
• VFM — Voice Frequency Measurement
• ISD — Instructional Systems Designers
• VOI — Voice Over Internet
• WWCE — World Wide Cellular Extension
• IVAD — Integrated Voice and Data
• ALIT — Automatic Line Insulation Test
• KSR — Key Send Receive
• STDM — Statistical Time Division Multiplexing
• SIT — Special Information Tone
• STP — Shielded Twisted-Pair
• BUC — Block Up-Converter
• APTC — Atlantic Provinces Telecommunications Council
• TAP — Test Access Path

• CT — Control terminal
• ITV — Instructional Telecommunications And Video
• STMB — Space-Time Multiple Beam
• STS — Synchronous Transfer Signal
• URC — Utility Reference Customer
• ADLI — Automatic Dial Line Identification
• NATS — North American Terrestrial System
• OTH-B — Over-the-Horizon Backscatter
• MSID — Mobile Station Identity
• WNAS — Wireless Network Access Services
• MMC — Minimum Monthly Charge
• MAC — Message Authenticity Check
• DS-1 — Digital Stream 1 (1.544 mbps)
• TVRO — Television Receive-Only
• TINA — Telecommunications Information Networking Architecture
• CBS — Common Battery Signaling
• ITSO — International Telecommunications Satellite Organization
• AT — Access Terminal
• RXD — Receive Data
• ASP — Active Signaling Protocol
• MRVT — MTP Routing Verification Test
• HFT — Human Factors in Telecommunications
• SCC — System Control Center
• IOS — Internet Over Satellite
• T1 — Transmission service at the DS1 rate of 1.544 Mbps
• SCM — Service Class Mark
• CK — Check Bit
• NSK — Nonstop Kernel
• WIX — Wireless Information EXchange
• LAPM — Link Access Protocol for Modems
• ERMES — European Radio Message System
• WLTG — Wireless LAN (Local Area Network) Technology Group
• SRU — Single Receiver Unit
• TP — Transaction Processor
• DSX-2 — Digital Stream Crossconnect 2 (6.312 Mbps)
• D — Diagonal
• UMTS — Universal Mobile Telecommunication Services
• WISE — Wireless Infrastructure Simulation Environment
• WBCS — Wireless Business Communications Systems
• FECC — Federal Emergency Communications Coordinator
• CTN — Community Telecommunications Network
• TTE — Telecommunications Terminal Equipment
• WBE — Wireless Business Engine
• FCO — Foreign Central Office
• SPA — Service Planning Area
• WCS — Wireless Communication Services
• DX — Duplex Signaling
• INSAT — India's Indian National Satellite
• PTFP — Public Telecommunications Facilities Program
• BCM — Bit Compression Multiplexer

• FCAPS — Fault, Configuration, Accounts, Performance, Security
• FICORA — Finnish Communications Regulatory Authority
• WSI — Wireless Services Integration
• LDC — Long Distance Carrier
• WNC — Wireless Network Communications
• NS — Non-Standard
• WIXD — Wireless Internet eXpress Data Connection
• IDDD — International Direct Distance Dialing
• WTRS — Wisconsin Telecommunication Relay System
• GSN — GPRS (General Packet Radio Service) Support Node
• XDSL — "generic" Digital Subscriber Line
• CO — Central Operations
• WTB — Wanted to buy
• TCCMS — Telecom Consumer Complaints Monitoring System (India)
• KEY — Keyset (multiline phone)
• MM — mismatch
• IVD — Integrated Voice and Data
• COMS — Cambridge Open Mobile System
• USI — User System Interface
• ESFDL — Extended Super Frame Data-Link
• TSAPI — Telephony Server Application Programming Interface
• CR — Call Reference
• SWF — SWitched Fractional
• STV — Subscription Television
• RPE-LPC — Regular Pulse Excited - Linear Predictive Coder
• PPT — Permanent Part Time
• MDTS — Mobile Data Terminal Software
• TSIP — Telecommunications System Installation Plan
• TIBS — Tactical Information Broadcast Service
• TOM — Telecom Operations Map
• MGW — Mobile GateWay
• HCT — Hierarchical Cellular Tree
• APOT — Access Point Of Termination
• RCMS — Recharge Card Management System
• FO — Fiber-Optic
• TSAPI — Telephony Services Application Programming Interface
• TELCO — Telecommunication Network for Cooperative Driving
• BWRC — Berkeley Wireless Research Center
• TEDP — Telecommunication Equipment Distribution Program
• ITW — International Telecoms Week
• IR — Information Rate
• LLI — Logical Link Identifier
• GEO — Geostationary-Earth-Orbit
• WID — Wireless Information Device
• SQM — Signal Quality Manager
• DUNC — Dial-Up Networking Connection
• TTK — Telephone Travel Kit
• LQO — Line Quality Operation
• TIE — Telephone Interconnect Expansion
• MED — Manipulative Electronic Deception

• TTP — Third-Party Provider
• TMN — Telecommunications Management Network
• NTON — National Transparent Optical Network
• ISDT — Integrated Services Digital Terminal
• BLT — Bottom Line Telecommunications
• IESS — INTELSAT Earth Station Standard
• TEM — Telecom Expense Management
• ISC — Information Systems Council
• BSVCI — Broadcast Signaling Virtual Channel Identifier
• F — Flow
• LAPD — Link Access Procedure D channel
• SAM — Service Access Multiplexer
• VRSP — Voltage, Ringing Signal Positive
• CERN — Centre Europйen de Recherche Nuclйaire
• LETS — Line Efficiency Tracking System
• CHM — Changeover and Changeback Messages
• OC-192 — Optical Carrier Signal, Level 192
• SEE — Software Engineering Environments
• SN — Station Number
• SSCOP — Service Specific Connection Oriented Protocol (ATM)
• SSP — Service Switching Point
• RTP — Research Triangle Park
• FUNI — Frame (relay) User Network Interface
• WWOM — Wireless Work Order Management
• TTAC — Telecommunication Technology Advisory Committee
• OE — Originating Equipment
• FELB — Far-End Loop Back
• LEO — Low-Earth-Orbit
• VCE — Voice Clarity Enhancement
• GOS — Gerry Otis Simpson
• ETT — Emona Telecoms Trainer
• WUF — Wireless University Forum
• SCAT — Single Channel Autonomous Trunking
• RFA — Recurrent Fault Analysis
• MDCNZ — Monthly Demand Charge for Non-Zone network Load
• IOPS — Internet Operators Providers Services
• CSUR — Conscript Unicode Registry
• RII — Routing Information Indicator bit
• FEFA — Far End Failure
• DMB — Disconnect and Make Busy
• CICT — Commission on Information and Communications Technology
• MEAS — Measured Extended Area Service
• NCA — Non-Call Associated
• RTAP — Real-Time Application Platform
• ITTC — Information and Telecommunication Technology Center
• CTSO — Cellular Telephone Service Order
• WACM — Wide Area Communications Management
• LSOA — Local Service Order Administration
• WNIU — Wireless Network Interface Unit
• STDM — Statistical Time Division Multiplexer

• VTAC — Vermont Telecom Advancement Center
• CTE — Computer Telephony Engine
• LMOS — Loop Maintenance Operations System
• VMB — Voice Message Broadcasting
• WDDM — Wavelength-Division Demultiplexing
• WCB — Wireline Competition Bureau (FCC)
• RDI-P — Remote Defect Indicator - Path
• GLD — German Long Distance
• TVL — TELECOM VANUATU LIMITED
• CW — Call Waiting Supplementary Service
• WTN — Working Telephone Number
• WACP — Wide Area Calling Plan
• CLS — Current Level of Service
• MJT — Modular Jack Terminal
• WPA — WiFi Protected Access
• UPR — User Performance Requirement
• CSP — Converged Service Platform
• WTDC 2002 — World Telecom Development Conference 2002
• NCOSE — National Council on Systems Engineering
• RLF — Remote Line Failure
• NAB — National Association Of Broadcasters
• WEWI — Wireline Electronic Weight Indicator
• LCN — Local Channel Number
• DSS — Digital Switching Subsystem
• MM — Multimode (fiber optic cable)
• DCAT — DSL (Digital Subscriber Line) Customer Advocacy Team
• IRTC — Illinois Rural TeleCommunication
• IA5 — International Alpha Set No. 5
• ACE — Authentication Encryption
• CQ — Communications Quality
• JICC — Justice International Calling Card
• JIS — Jurisdictional Interstate Service
• CPT — Cellular Paging Teleservice
• LAP-D — Link Access Procedure- Digital channel
• TNS — Time to Next Send
• JLS — Just Lousy Service
• TAMS — Telecom Analysis and Management System
• BT — Busy Tone
• WWTW — World Wide Telecom Web
• AA — Automatic Answer
• DMB — Digital Multimedia Broadcasting
• TDP — Tag Distribution Protocol
• TANE — Telephone Association of New England
• STE — Syrian Telecommunications Establishment
• LMS — Local Measured Service
• CMI — Computer Managed Instituteuction
• WHAT — Wireless Hybrid Asynchronous Time-bounded
• CSF — Common Service Framework
• AA — Agile Access
• PCTF — Per-Call Test Failure

• A — All lines
• ECSA — Exchange Carrier Standards Association
• ISC — International Switching Center
• TED — Triteal Enterprise Desktop
• RRO — Regulated Rate Option
• TCMS — Trunked Code Management System
• TAAC — Telecommunications Access Advisory Committee
• IVI — Intel Video Interactive
• GTXC — Global Telephone Exchange Carrier
• TSG — Test Signal Generator
• IS-41 — TIA/EIA Interim Standard for mobile management
• HOMEPNA — Home Phoneline Networking Alliance [also HomePNA2]
• WIPN — Wireless Internet Protocol Network
• IWE — Institute for Wireless Education
• VRSM — Voltage, Ringing Signal Modified (inverted)
• SYNTRAN — Synchronous Transmission
• WWAT — Wireless Wide Area Telemetry
• CC — Coordination Center
• OCTS — Ocean Color and Temperature Scanner
• AZDL — Adjusted Zonal Daily Load
• DLS — Dual Line Signalling
• UTRA — Universal Terrestrial Radio Access
• ISM — Instrumentation Scientific and Medical
• ITU-TSS — International Telecommunications Union - Telecommunications Standardization Sector
• SQE — Signal Quality Error
• BRQ — Bandwidth Request
• TLS — Telephone Line Simulator
• DTF — Dial Tone First
• WCPE — Wireless Customer Premises Equipment
• VPLS — Virtual Private LAN (Local Area Network) Service
• DCN — Disconnected and Changed Numbers
• AMT — Australasian Mobile Telecommunications
• OM — operations management
• AIOD — Automatic Identification of Outward Dialed calls
• DEN — Directory Enabled Networks
• LCA — Line Circuit Address
• CNA — Certified Novell Administrator
• WNQS — Wireless Network Quality Specification
• DSP — Data Service Provider
• RRJ — Registration Reject
• TMR — Trunked Mobile Radio
• ECP — Exchange Control Panel
• PIN — Positive-Intrinsic-Negative
• WLSM — Wireless LAN (Local Area Network) Springboard Module
• SDN — Software-Defined Network
• CBO — Call-Back Only
• ELL — Ethernet Leased Line
• UNP — UN-Published
• LADT — Local Area Data Transport
• SYNC — Synchronous

• SMG — Super Master Group
• ASE — Accredited Systems Engineer
• WIPSC — Wireless Intelligent Personal Server Consortium
• SINAP — Signalling and Intelligent Network Applications Platform
• CSA — Central Service Area
• PTCM — Pragmatic Trellis-Coded Modulation
• UMC — Ukrainian Mobile Communications
• IDM — Interim Data Modem
• SSS — Switching Subsystem
• ICS — Intelligent Calling System ID Identification
• OTM — Object Transaction Manager
• MERS — Most Economical Route Selection
• DCH — Discrete CHannel
• MEO — Middle-Earth-Orbit
• RACE — Research for Advanced Communications in Europe
• ALC — Automatic Line Controller
• URM — Uniform Redial Model
• WTF — Wireless Telecommunications Facility
• DPO — Dial Pulse Originate
• WIT — Wireless Image Transfer
• EPI — External Provisioning Interface
• MUF — Maximum Useable Frequency
• ADU — Accumulation and Distribution Unit
• SHOE — Simple Hypertext Ontology Extensions
• DQR — Directory enQuiry Restricted
• WNT — Windows NT
• SCS — Signal Collection System
• QIC — Quality Improvement Council
• DA — decanoic acid
• OHD — Optical Heterodyne Detection
• WTR — Wireless Token Ring
• DS-1C — Digital Stream 1C (3.152 mbps)
• WIPA — Walkup Internet Port Authentication
• IWCS — Integrated Wideband Communications System
• EDGE — Enhanced Data for GSM Evolution
• WWTA — World Wireless Technologies, Asia
• EOC — Embedded Operations Channel
• YLT — Your Local Telecom
• WEPD — Weighted Early Packet Discard
• FFM — First Failure to Match
• BTMS — BITEK Telecommunications Management System
• UTL — United Telecom Limited
• WBA — Wireless Business Application
• WLA — WireLess Access
• ZDL — Zonal Daily Load
• TIMS — Transmission Impairment Measuring Set
• TMT — Technology, Media, and Telecommunications
• WTPF — World Telecommunication Policy Forum
• CS — Clear to Send
• TSSI — Telecom Switched Services Interoperability

• ECTEL — Eastern Caribbean TELecommunications Authority
• RAPID — Remote Access Protocol Interface Device
• DLIS — Directory Listing Inquiry System
• CLECS — Competitive Local Exchange Carriers
• ITF — Information Transport Function
• WDCX — Wideband Digital Cross-connect
• VSP — VoIP Service Partner
• NOLM — Nonlinear Optical Loop Mirror
• PNVS — Pilot Night Vision Sensor
• RATS — Radio-Amateur Telecommunications Society
• OC-12 — Optical Carrier Signal, Level 12
• CCS — Centa- (hundred) Call Seconds
• WLAR — Wireless LAN (Local Area Network) Access Repeater
• RWT — Receiver Wait Time
• RU — Remote Unit
• TAPS — TELEPHONE APPLICATION PROCESSING SYSTEM
• EC — Echo Cancelling
• QCIF — Quarter Common Image Format
• TLWS — Trunk and Line Work Station
• POR — Power On Reset
• WNA — Wireless Network Auburn
• WGIS — Wireless Geographical Information System
• CMP — Connection Management Procedures
• IMT — International Mobile Telecommunications
• M — Maintenance (Job Status)
• AM — Advance Mobile
• LOP-V — Loss Of Pointer - Virtual
• WVAS — Wireless Value Added Services
• DCPZ — Daily withdrawal coincident with Customer Peak for a Zone
• VODAFONE — Combined Voice, Data, Telephone:
• CVSD — Continuous Variable Slope Detection
• SWAN — Structured Wireless Aware Network
• DLC — Digital Line Controller
• CID — Cell IDentification number
• WIGLE — Wireless Geographic Logging Engine
• RNW — Radio NetWork
• FERF — Far-End Receive Failure
• VVD — Voice and Video Data
• IQ — In-phase and Quadrature
• NIMA — National Imagery Mapping Agency
• PST — Public Safety Telecommunications
• WWVC — WorldWide VideoConferencing
• FOTP — Fiber Optic Test Procedures
• WTIS — Wireless Telecommunications Information & Services
• CPS — Customer Premises System (Bellcore)
• TTS — Telephone Traffic Simulator
• WRAN — Wireless Rural Area Network
• MTS — message transport system
• ITNL — Indusind Telecom Network Ltd
• DP — Drop Point

• DF — Distributing Frame
• WCM — Wireless Connection Manager
• IDDD — International Direct Dialing Designator
• WDSN — Wireless Distributed Sensor Networks
• SRS — Supported Residential Services
• TLC — Text Link Cellular
• VIDF — Vertical Intermediate Distributing Frame
• CHE — Central Head-End
• E-911 — Enhanced emergency telephone number
• IMMAT — Instituto Municipal Malvinas Argentinas Telecomunicaciones
• LQE — Line Quality Engineering
• SLT — Signaling Link Termination
• WLRL — Wireless LAN (Local Area Network) Research Laboratory
• WDDF — Wireless Data Delivery Function
• VSR — Viking Single-line loud Ringer
• TRNA — Temporarily Restricted Net Asset
• WIDS — Wireless Intrusion Detection Sensor
• LMC — Loop Maintenance Center
• WL — Wire Line
• AUBW — AutoBot Walkthrough
• DI — Document Index
• TFA — Toll Free Authorization
• ILQ — Inbound Link Quality
• GTSS — Global Telecom Solutions Sector
• BASH-R — BAndwidth SHaring with Resource constraints
• MPPP — Multilink Point-to-Point Protocol
• SM-SC — Short Message Service Center
• UNL — Unlisted
• ECG — English Cell Group
• EMLPP — Enhanced Multi-Level Precedence and Priority
• RATS — Richmond Amateur Telecommunications Society
• TESP — Telecommunications Enterprise Strategic Program
• UMATS — University of Maryland Academic Telecommunication System
• TIP — Telecommunications Infrastructure Planning
• PICS — Protocol Implementation Conformance Statement
• EMX — Earth and Magneto Signaling
• CFU — Call Forward Unconditionally
• COIC — Central Office Interface Circuit
• WORP — Wireless Outdoor Router Protocol
• IMN — Intelligent Mobile Network
• CSL — Create a Simple Life
• UCP — Universal Communications Platform
• FCA — Fixed Channel Assignment
• ESVN — Executive Secure Voice Network
• O — Optical
• AGRAS — Air-Ground Radiotelephone Automated Service
• ATZ — Attention: Reset modem
• XI — X Identification (frame)
• AIOD — Automatic Identification of Outward Dialing
• AC — Authorization Center

• STN — Satellite Telecommunications Networks
• RES — Resident
• OR — Office Regenerator
• CMP — Communications Module Processor
• SNA — Systems Network Architecture
• ANCD — Automatic Network Call Distrubution
• TE — Thermoelectric
• RWI — Real Wireless Intelligence
• LQI — Line Quality Indicator
• ADSRF — Additional Device Savings Recovery Fee
• SNECS — Single National Emergency Call System
• DNMS — Dual Network Media Server
• VMES — Vehicle-Mounted Earth Station
• WDL — Wireless Device License
• WHM — Wireless Host Module
• MBCM — Multiple Block-Coded Modulation
• HTU-C — HDSL (High-bit-rate Digital Subscriber Line) Transmission Unit - Central office
• X25 — A Packet Switching Protocol
• IKI — Institut Kosmitcheskikh Issledovanii
• CDO — Community Dial Office
• WNI — Wireless Network Interface
• MMT — Multimedia Multiparty Teleconferencing
• VTPM — Virtual Terminal Protocol Machine
• VOIPTXT — Voice over Internet Protocol Text
• ENFIA — Exchange Network Facilities for Interstate Access
• CSI — Clearing Subnetwork Identification
• CDR — Common Data Rate
• UPPC — Up-Path Power Control
• ARE — All Routes Explorer
• FSS — Fixed Satellite System
• CL — cell loss
• ISD — Independent Segment Decoding
• FSS — Fixed Satellite Services
• ITS — Institute for Telecommunication Sciences
• BIPT — Belgian Institute for Post and Telecommunications
• UTFX — Unit Testing Framework - XSLT (Extensible Stylesheet Language Transformation)
• FDS — Filtering, Distributing, and Serving
• WND — Wireless Network Design
• CI — Customer Installation
• SDB — Switched Digital Broadcast
• WGX — WebPhone Gateway eXchange
• CN — Calling Number
• LAP — Link Access Protocol
• VMIC — VME Microsystems International Corporation
• WTIA — Wireless Technology Industry Association
• OTA — Over-the-Air Activation
• COSMIC — common systems main interconnecting
• HPNA — Home Phoneline Network Adapter
• RPS — Reference Picture Selection
• PN — Public Network

• WOQS — Wireless Operator Quarterly Service
• MFN — Multiple Frequency Network
• UNS — Universal Numbering System
• SDK — Service Development Kit
• ACG — Automatic Code Gapping
• THT — Total Handling Time
• WNM — Wireless Network Management
• MFT — Metallic Facilities Terminal
• WLN — WireLess Networking
• MVPRP — Multivendor Problem Resolution Process
• SLC — Subscriber Line Concentrator
• RBES — Rule-Based Expert Systems
• SLIM — Service Level Improvement Method
• CF — Coin First
• QPW — QUIKPAGER Wireless
• SS3 — Signalling System 3 (2280 Hz tone)
• MDC — Monthly Demand Charge
• KLM — Keyboard Layout Management
• LOSW — Loss Of Synchronous Word
• RLCI — Receive Line Clock Input
• APTG — Amplifier Probe and Tone Generator Kit
• TGPSI — Transmission Gap Pattern Sequence Identifier
• SRB — Software Release Bulletin
• TPC — Transmit Power Control
• WNRC — Wireless Networks Research Center
• ICR — Intelligent Call Routing
• ASC — Available Spare Capacity
• RSS — Remote Switching Sites
• RTRP — Regional Telecommunications Restructuring Project
• OC-36 — Optical Carrier Signal, Level 36
• COPS — Caring Operators Personal Service
• BT — Bluetooth Two
• CRA — Constant Rate Allocation
• TMAP — Technical Management Assistance Programme
• TBR — Tagged Bit Rate
• SCRG — Servicing Carrier Reference Guide
• HSC — High Speed Connect
• TTTN — Tandem Tie Trunk Network
• ZUD — Zero Unscheduled Downtime
• ESMR — Enhanced Specialized Mobile Radiotelephony
• RTDC — Regional Telecommunication Development Conference
• MP — Management Processor
• PAL — Phase Alternating by Line
• CSL — Communication Services Limited
• TL1 — Transaction Language One
• VRSP — Video Relay Service Provider
• IDR — Installer Design Required
• LVC — Label Virtual Circuit
• BTS — Business Telecommunications Services
• MNET — Minnesota's Network for Enterprise Telecommunications

• EDGE — Edhanced Data Rates for Global Evolution
• IVDT — Integrated Voice/Data Terminal
• BC — Committed Burst Size
• SPC — Service Provider Code
• TELCO — Telecommunications Company
• LOP-L — Loss Of Pointer - Line
• SLLR — Single Line Loud Ringer
• RI — Ring In
• WRRK — Wireless Router and Repeater Kit
• MWC — Multi-Way Calling
• SPTC — Swaziland Post and Telecommunications Corporation
• CU — Copper Local Loop
• JTRS — Joint Tactical Radio Systems
• CMRS — Commercial Mobile Radio Services
• WIOP — Wireless Inter-ORB (Object Request Broker) Protocol
• MIS — Mobile Information Service
• TELEX — Teleprinter Exchange
• RBHC — Regional Bell Holding Company
• HTU — HDSL (High-bit-rate Digital Subscriber Line) Transmission Unit
• RAST — Receive and Send Terminal
• GSA — Guarded Single Assignment
• DUITS — Digital, Ubiquitous, Interoperable, Transparent and Secure
• BETAG — Beginning-End Tag
• ILRM — Interim Local Management Interface
• EPSCS — Enhanced Private Switch Controlled System
• DCA — Distributed Communications Architecture
• AOS — Alternative Operator Services
• SCRB — SBC (Single Board Computer) Control and Reset Box
• WIAD — Wireless Integrated Access Device
• SWANSAT — Super-Wide Area Network SATellite
• DV — Data and Voice
• UDTX — Universal Data Transceiver
• STE — Signaling Terminal Equipment
• DP — Dial Pulsing
• WTEL — Wireless TELephony
• FOB — Forward on Busy
• WTSF — Wireless Telecommunication Services Facilities
• WECM — WebSphere Everyplace Connection Manager
• TCM — Tandem Connection Maintenance
• DF — Data Frame
• AMSI — Ameritech Message Signal Interface
• VQR — Voice Quality Rating
• PSP — Payphone Service Provider
• LL — Lower Layer
• WMTS — Wireless Medical Telemetry Service
• WTCP — Wireless Transport Control Protocol
• EPPR — Empty Packet Production Rate
• UMTS — Universal Mobile Telecom Surfwax
• DPE — Dollar Phone Enterprise
• WUA — Wireless USB (Universal Serial Bus) Adapter

• LE — Line Encryption
• EUCL — End User Common Line
• BAC — Bar Calls
• ERA — Enhanced Remote Access
• CCO — Component Coordinator
• USLD — United States Long Distance
• ASR — Automatic Send-Receive
• P — Planning
• SAC — Syntax-based Arithmetic Coding
• VFM — Voice/ Fax Module
• VCA — Voice Communications Adapter
• TICS — Telecommunications And Instructional Computing Support
• WSNN — Wireless Sensor Network News
• MDCZ — Monthly Demand Charge for a Zone
• DSS — Digital Subscriber Signalling
• TUMS — Telephone and Utilities Maintenance System
• ISC — Infrastructure Service Charge
• GTTI — Global Telecommunication Training Institute
• ROF — Reformat on the Fly
• PSU — Packet Switching Unit
• ISA — Innovative Slot Allocation
• BR — Basic Rate
• DSRF — Device Savings Recovery Fee
• SDP — Service Definition and Provisioning
• THAAD — Theater High Altitude Area Defense
• PAD — Packet Assembler-Disassemble
• WBT — Wireless Business Technology
• MAPS — Maps Application Provisioning System
• DTIS — Department of Telecommunications and Information Services
• BLERT — Block Error Rate Test
• RCE — Region Code Enhancement
• ULSI — Ultra Large-scale Integration
• SRP — Spatial Reuse Protocol
• LAW — Local Area Wireless
• ADU — Analog-to-Digital Unit
• BLERT — BLock Error Rate Tester
• CCF — Custom Calling Feature
• VCC — VSAT (Very-Small-Aperture Terminal) Control Center
• TISM — Telecommunication, Information Studies and Media
• SWNI — Smart Wireless Network Interface
• TETRA — Trans-European Trunked RAdio
• XDSL — x (any type of) Digital Subscriber Line
• AHT — Average Holding Time
• VWO — Virtual Wire Operations
• MMF — Microsoft Mail File
• ATR — Advanced Telecommunications Research laboratory
• TOSL — Telecommunications Ombudsman Service Limited
• CTNS — Certified Telecommunications Network Specialist
• WTNP — Wireless Telephone Number Portability
• TVL — Telecoms Virtual Library

• WTRP — Wireless Token Ring Protocol
• IN7 — Compaq SS7 stack
• ITU-T — International Telecommunication Union-Telecommunications
• MOM — Mainboard Operation Monitor
• MOE — Modem Operating Environment
• DCPNZ — Daily transmission Charge for Peak Non-Zone network load
• EICS — EURESCOM Information and Communications Services
• RLDI — Receive Line Data Input
• VT — Virtual Tributary signal
• HLB — Hierarchical Line Balancing
• WOSN — Wireless Optimization Service Node
• DCPV — Daily Customer Pool Volume
• BCDMA — Broadband CDMA
• SILO — Signal Intercept from Low Orbit
• WFQ — Weighted Fair Queueing
• TPE — Telephony Platform Engine
• RUIM — Removable User Identification Module
• UTI — Union Internationale des Telecommunications
• WNRL — Wireless Network Research Laboratory
• TTX — TeleTeXt
• IRMA — Interactive Remote Messaging Application
• HN — Home Number
• LAP-D — Link Access Protocol-D channel
• CNA — Called Number Authority
• RALB — Resource All Busy
• WICD — Wireless Interface Connection Daemon
• NTSA — Networking Technical Support Alliance
• CNA — Cell Not Available
• ACIS — Andy Charles Ians System solid modelling geometric engine
• RSS — Remote Switching System
• DT — Dial Tone
• VMAC — Voice Mobile Attenuation Code
• WBBI — Wireless BroadBand Internet
• DSX-3 — Digital Stream Crossconnect 3 (44.736 Mbps)
• COC — Carrier of Carriers
• TSY — Telephony Server
• SDTA — South Dakota Telecommunications Association
• WXE — Wireless Exchange Engine
• MJC — Modular Jack Cable
• WP7 — Windows Phone 7
• WTID — World TELECOM Internet Day
• WLS — Wait Listing Service
• RB — Randomized Block
• SLC — Subscriber Loop Carrier
• UMTS — Unified Mobile Telecommunication System
• VDS — Variable Department Sonar
• CVSD — Continuously Variable Slope, Delta modulation
• SHIT — Single-Hop Infrastructure Transmission
• TIC — Talking In Confidence
• GAT — GSM, AMPS, and TDMA

• IMS — IP (Internet Protocol) Multimedia Subsystem
• VCC — Virtual Call Center
• DB — Dial Back
• ICE — Information Content Exchange
• CID — Call Instance Data
• WAVE — Wireless Audio Visual Email
• WPMS — Wireless Pay phone Management System
• CDM — Code Division Multiplexing
• WLEC — WireLess Ethernet Converter
• RPS — Really Poor Service
• F — Flowability
• HCF — High Connection Failure
• ADTN — Agency Data Telecommunications Network
• WNP — Wireless Number Portability
• SCC — Signal Conversion Circuit
• MCFI — Multiple number Call Forwarding Inhibit
• TPS — Transmission Parameter Signalling
• TLC — Telecommunication Link Controller
• ZPD — Zero-Plus Dialing
• T2R — Trusted Transaction Roaming
• SWF-DS1 — SWitched Fractional Digital Signal 1 line
• BDS — Bundled Digital Services
• CS — Communications Satellite
• RTX — Real Telephone eXchange
• PVRA — Physical Volume Reserved Area
• CUA — Call Unit Autodialer
• RHE — Regional Head-End
• WON — Wireless Optical Network
• VQC — Vector Quantizing Code
• ATLAS — Accessing Telecoms Links Across Scotland
• HTI — Handoff Transfer Initiate
• CMS — Circuit Multiplication System
• UG — User's Group
• SATRA — A Saudi Arabian Telecommunications Regulatory Authority
• SCPI — Standard Commands for Programmable Instituteuments
• LR — Line Rate
• SS — Single Step
• RWN — Regional Wireless Networks
• TSD — Transmission System Development
• VNTR — Variable Number Tandem Repeats
• TLX — TELEX (TELegraph EXchange)
• IRB — Instituteuction Reorder Buffer
• RI — Ring Interface
• TMAB — Telecom Managers Association of Belgium
• WADS — Wireless Access Development System
• SS#7 — Signaling System # 7
• VLDS — Very Large Data Storage
• MND — Multi-Number Dialer
• WLLD — Wireless Local Loop Delivery
• SAM — System Administration Manager

• WGS — Worldwide Geodesic System
• PVS — Pennisula Video Surveillance
• DIP — Dialup Internet Protocol
• VQL — Vector Quantizing Level
• RZ — Receive ZModem
• DAP — Demand Access Protocol
• CPP — Calling Party Pays
• TTE — Tallahassee Telephone Exchange
• FCOT — Fiber Central Office Terminal
• CMM — Cable Management Module
• CENTREX — Central Office Exchange
• TOS — Terms Of Service
• USITA — United States Independent Telephone Association
• SVC — Signaling Virtual Channel
• L — Lambert
• VAC — Voice Activity Compression
• WMTP — Wireless Messaging Transfer Protocol
• CD — Channel Delay
• H0 — High-capacity ISDN channel operating at 384 kbps
• RASC — Radio Access System Controller
• ASLV — Augumented Satellite Launch Vehicle
• ITR — Intelligent Text Retrieval
• TDR — Transaction Data Reports
• STPI — Stentor Telecom Policy, Inc.
• IPOD — Internet Phone Over Data
• DCN — Data Communications Network
• ITC — Interstate Telecommunications Cooperative
• RAU — Residential Adaptor Unit
• LDDS — Limited Distance Data Service
• AA — Audit Agent
• CASE — Common Application Service Elements
• LQF — Line Quality Function
• OC-24 — Optical Carrier Signal, Level 24
• PCL — Product Computing Module Load(s)
• QRW — Quasi-Random Word
• ANP — Autonomous Network Planning
• ATM — Automated Transmissions Machine
• T — Tip
• FTFW — FactoryTalk For Windows
• RTNZ — Rate for Transmission service for a Non-Zone load
• IS — Integrated Services
• CRACK — Challenge Response for Authenticated Crypto Keys
• IMM — Interactive Mobile Media
• RSI — Repetative Strain Injury
• PNA — Parallel Network Architecture
• UMS — Universal Messaging System
• WTNO — Wireless Technologies and Network Overview
• CTUF — Cape Telecommunications Users Forum
• ISUP — ISDN Service User Part
• ACF — Admission Confirm

• MFR — Multi-link Frame Relay
• CPEB — Channel Partner Enablement Briefing
• SSD — Source-surface Distance
• DLT — Double Leading Tone
• HFK — Hands Free Kit
• TRF — Transmit Reject Filter
• RCMAG — Recent Change Memory Administration Group
• SS2 — Signalling System 2 (600/750 Hz tones)
• APS — Affordable Portable Services
• TSA — Terminating Switched Access
• WNQR — Wireless Network Quality Review
• STX — Start of Transmission
• ITU-R — International Telecommunication Union-Radiocommunications
• DRS — Dial Return System
• HIDF — Horizontal Intermediate Distributing Frame
• WIUB — WIreless Universal Base-mounted
• BRITE — Basic Rate Interface Transmission Extension
• WIMC — Wireless Intelligent Mobile Communicator
• TLR — Traffic Line Remover
• PSN — Personal Subscription Number
• WT — Wireless Telephony
• SP — Single Purpose
• TNS — Telephone Notification System
• RTDF — Rural Telecomunication Development Fund
• PIC — Pre-Subscribed Interexchange Carrier
• BYOP — Bring Your Own Portal
• TBS — Telephone Billing Service
• WNE — Wireless Network Experiment
• T1 — 1,544 Mbits per Second line
• WRI — Wireless Reader Interface
• BM — Maximum Burst size
• RTSE — Remote Transfer Service Element
• WACS — Wireless Access Communications System
• VANS — Value Added Network Services
• VMW — Vertically Modulated Well
• AMS — Analog and Mixed Signal
• RACE — Research into Advanced Communications in Europe
• OC — Output Controller
• HSOPA — High-Speed OFDM (Orthogonal Frequency Division Multiplexing) Packet Access
• RYC — Returned Your Call
• BGSA — Banded Geographical Service Area
• SSG — Signalling Server Global
• SMDF — Subscriber Maintenance Distributing Frame
• TIRKS — Trunk Integrated Records Keeping System
• SARS — Service Assistance Referral System
• IMR — International Mobile Roaming
• EQ — Equal To
• PTP — Personal Telco Project
• WNAR — Wireless Network Access Requirements
• LAS — Local Authentication Service

• CRT — Combined Rlogin and Telnet
• DHA — Dialogue Handling
• CSS — Customer Service System
• QNS — Questar Network Services
• WCTG — Wireless Communications Technologies Group
• STA — State Transport Authority
• COCOT — Customer Owned Coin Operated Telephone
• SCAYNP — Someone Calls And You No Pay
• SIP — Service Interface Point
• AMP — amplifier / amplification
• CS — Customer Specification
• ASR — Automatic Set Relocation
• PTML — Pakistan Telecommunications Mobile, LTD.
• UWT — United World Telecom
• WCTP — Wireless Communication Transfer Protocol
• CSM — Communications Services Management
• ET — Emerging Technologies
• CS — Connection Segment
• SRP — Specialized Resource Point
• SM — Statistical Multiplexing
• WFUP — Wireless Fair Usage Policy
• ULLS — Unconditioned Local Loop Service
• EA — Emergency Action (JOC)
• CD — Connect Direct
• WACR — Wide Area Call Reception
• TDU — T1 Distribution Unit
• TXE — Transmitter Empty
• NAS — North American Standard
• MLP — Multi-layer Perception
• WUPE — Wireless User Premises Equipment
• QNL — QoS Networking Laboratory, Boston University
• XA-SMDS — Exchange Access Switched Multi-Megabit Data Service
• RINO — Roaming International Network Operator
• BCP — Before Cell Phones
• WBSN — Wireless Broadband-Sharing Network
• WTS — Wireless Telecommunication Services
• ATP — Association of Telecom Professionals
• RITS — Residential Information Technology Services
• DMS — Digital Multiplex Switch
• TPQ — Transmission Power Quality
• TPSN — Triple Play Subscriber Network
• FFC — Front-Facing Camera
• IPM — Interpersonal Messaging System
• M-LEAD — Mouth Lead
• TSB — Telecommunications Systems Bulletin
• WWO — Wireless Work Order
• PTC — Pots Tandem Centrex
• MLC — Multiple Level Cell
• TLPU — Telecommunications Line Protector Unit
• TR — Temporal Reference

• WNQ — Wireless Network Quality
• T — Tipper
• DFA — Distribution Feeder Antenna
• CMM — Calls, Minimums, Maximums
• FB — Framing Bit
• KTL — Killarney Telecommunications Ltd
• HOPA — Higher-Order Path Adaptation
• TMO — Telecommunications Management Officer
• CWC — Center Weight Control
• TBQ — Telecommunications Billing Question
• WLSS — WireLess Select Switch
• WTAI — Wireless Telephony Applications Interface
• VIL — Voice Interconnect Link
• TIE — Telephone Interconnect Equipment
• RPE-LTP — Regular Pulse Excited - Long Term Prediction
• AP — Applications Processor
• WIZ — Wireless Internet Zone
• LSP — Local Support Provider
• ISBX — Internet Satellite Broadcast Exchange
• CAPS — Common ISDN API Service
• RANN — Recorder ANNouncer
• CTI — Computer Telephone Integration
• USPRO — United States Product Data Association
• PTA — Pre-Transmission Audit
• EMS — Element Management Service
• SCC — Switching Control Center
• FTW — France Telecom Wireless
• RWL — RF (Radio Frequency) / Wireless Laboratory
• WCFQ — Wireless Credit-based Fair Queueing
• ECHI — External Call History Interface
• SFS — Start of Frame Sequence
• CD — Carrier Detect
• IFLS — Inter-Frequency Load Sharing
• SG — Supergroup
• NSC — Non-Standard Facilities Command
• SS7 — Signalling System 7
• EB — Expanded Basic
• CPI — Computer-PBX Interface
• TMS — Time-Multiplexed Switch
• WCRM — Wireless Customer Relationship Management
• SPH — Samsung PHone
• NMS — Network Management Service
• CPIC — Cost Per Inbound Call
• MLS — Mobile Location Services
• CF — Carrier Furnished
• CLID — Calling Line IDentifier
• GWCS — General Wireless Communications Service (46560 - 4685 MHz)
• UL — Upper Layer
• WWRF — Wireless World Research Forum
• CTS — Cordless Telephone System

• HBOS — High-Bandwidth Optical Services
• C — Connection
• CF — Call Forward
• BT — British Telecom…
• TJR — Trunk and Junction Routing
• DNI — Did Not Include
• MAP — Management Assessment Program
• ECS — Emergency Communication System
• SOA — Service Order Administration
• TACS — Total Access Communications Systems
• WWJ — Wireless Watch Japan (est. 2001)
• RYP — Romanian Yellow Pages
• SRM — Short-Range Modem
• VA — Voice Activity
• VMLA — Virtual Mobile Location Area
• UIQ — User Interface Quartz
• TAP — Telocator Alphanumeric Paging
• IPD — Intelligent Pulse Decoding
• URQ — Unregistration Request
• SMT — Secure Mobile Transfer
• WMIP — Wireless-Mobility Integration Protocol
• WAP — Wireless Access Provider
• ICE — Integrated Communications Environment
• WIVA — Wireless Integrated Voice Access
• GDS — Generic Digital Services
• VMR — Video Mail Retrieval
• RGC — Resource-Guaranteed Connection
• UARS — Upper Atmospheric Research Satellite
• ET — Exchange Termination
• RTPB — Residential consumer Third Party Billing
• AIP — Administrative Installation Point
• WIAX — WIreless Internet Access
• FP — Full Period of service
• WTCD — World Telephone Card Databank
• DC — Dry Circuit
• WRBB — Wireless Rural BroadBand
• FPS — Fast Packet Switching
• DNA — Daytime Nighttime Anytime
• TRD — Timed Release Disconnect
• RTE — Run-Time Environment
• NCSU — North Carolina State Universityrsity
• VMUI — Voice Mail User Interface
• TTFG — Telecommunications Technology Forecasting Group
• BC — Burst copy
• CSP — Callback Service Provider
• NM — Network Manager (GSFC)
• PTCL — Pakistan TeleComunication Land-line
• ISUP — International Standards Telecommunications Union
• WWSI — Wireless Web Systems Integration
• WBIA — Wireless Broadband Internet Access

• AMI — Alternate Mark Indicator
• RR — Receiver Ready
• VYP — Virtual Yellow Pages
• GC — Global Communications
• SNAP — Subnetwork Access Point
• IDS — Information Directory Service
• TSM — Telecommunications Systems Management
• CEP — Communication End Point
• WTFB — World Telecoms Financial Benchmarks
• AC — Armored Cable (electricity)
• TXC — Transmission Complete
• WMBD — Wireless Media Broadcast Device
• ALS — Alternative Line Service
• NB — Narrowband
• PTC — Pacific Telecommunications Council
• TDSA — TELCO (TELephone COmpany) Distribution Support Architecture
• WTDC — World Telecommunications Development Conference
• TSB — Telecommunications System Bulletin
• CP — Charging Party
• VQE — Voice-Quality Enhancements
• WPCS — Wireless Personal Communications Services
• LW — Long-wavelength
• VTS — Virtual Talk Session
• IWW — Internet World Wireless conference
• DCCX — Direct Circuit Control Exchange
• DCR — Dropped Call Rate
• WSP — Wireless Signal Processor
• CT — Channel Termination
• ACC — Automatic Carrier Control
• SAG — Subscription Assignment Group
• ISI — Institute of Scientific Information
• TCA — Telecom Computing Architecture
• CTWU — Chunghwa Telecom Workers' Union
• WFOC — Wireless Full Operational Capability
• WIBR — WIreless gate BRidge
• SIO — Subscribers In Operation
• SRD — Short Range Devices
• WTSO — Washington Telecommunications Services and Operations
• ITP — Interdisciplinary Telecom Program
• DM — Distributed Management
• TW — TWinbrook (telephone exchange)
• WGEN — Wireless GENeration
• APTG — Academy for Professional TraininG
• THP — Terminal Handler Process
• ARP — Access Responsible Party
• WCIT — World Conference on International Telecommunications
• ALS — Accounts Ledger System
• WLIA — Wireless Location Industry Association
• ESP — Electro-Selective Pattern
• ROI — Return On Information

• TSI — Telecommunications Services Inc
• WCS — Wireless Coupon System
• CFO — Core Funded Organization
• UKB — Universal Keyboard
• TACS — Telephone Access Customer Satisfaction
• RPT — Reply Paid Telegram
• SSP — Secure Service Provider
• UPMT — Universal Per-application Mobility management using Tunnels
• WNPD — Wireless Network Persistent Data
• VPF — Virtual Private Facility
• LTS — Laboratory for Telecommunication Sciences
• SVD — Simultaneous Voice and Data Processor
• WIEA — Wireless Internet Enterprise Application
• SMS — Server Malloc (Memory ALLOCation) System
• MC — Make Call
• TOS — Testing Operation System
• WBGK — Wireless BridGe Kit
• WRB — Wireless Receiver Box
• SD — Signal distribution
• EUS — End User Segment
• OTD — Open Terminal Directive
• SCC — Service Connection Charges
• WCOE — Wireless Center of Excellence
• WICI — Wireless Innovations in Communications Initiative
• UCC — Universal Connectivity Charge
• RTS — Real-Time Simulator
• PSA — Protocol-Specific Annex
• CTM — Cellular Textphone Modem
• WNPO — Wireless Number Portability Operations subcommittee
• NE — Network Entity
• CS — Carrier Sense
• PC — Process Control
• VERT — Vertical (distribution frame)
• CSP — Custom SIM Profile
• MLE — Metropolitan Line Extension
• VIEW — Virtual Interface Environment Workstation
• TAB — Tape Automated Bonding
• O — Oblique
• WBCT — Wireless Broadband Communications Technology
• VMY — Voice Mobility
• VO — Validation Office
• WLSE — Wireless LAN (Local Area Network) Solution Engine
• WTNPA — Wireless Telephone Number Portability Act
• MARS — Military Affiliated Radio System
• ROS — Remote Operations Service
• VQI — Voice Quality Improvement
• VTAC — Vermont Telecommunications Application Center
• UNLD — UNlimited Long Distance
• DA — Dodecanedioic Acid
• NN — node number

• ULQ — User Level Quality
• IAC — Install And Commission
• SDNB — Secondary DN Call Blocking
• CAL — Connection Access License
• RKB — Ring Knowledge Base
• WWZA — Wireless WorkZone Alliance
• SMC — Switch Management Center
• ZFH — Novell ZENworks For Handhelds
• FAS — Fals ansewring supervision
• DT — Dialup Terminal
• IAV — Images, Audio, Video
• DOS — data over signaling
• DTS — Data Telecom Support
• F — Farenheit
• MFRM — Multi-carrier Flexible Radio Module
• RO — Recieve Only
• SPV — Sound, Picture, Voice
• UNE-P — Unbundled Network Element - Platform
• STC — Signaling Transport Converter
• FA — Failed Answer
• TS — Tip and Sleeve
• WHIW — Wireless Home Installation Wizard
• TWT — Time Warner Telecom
• TCO — Total Connection Operation
• CC — Connection Confirm
• CSA — Carrier Servicing Area
• TCP — Telephone Connecting Program
• WWZ — Wireless Work Zone
• TELEX — TELegraph EXchange
• DCT — Digital Cordless Telecommunications
• TIRF — Telecoms Industry Regulatory Forum
• TMC — Timeslot Management Channel
• AV — AUTOVON
• TES — Telecom Electric Supply
• MB — Medium Band
• CI — CHARM Interface
• SS4 — Signalling System 4 (2040/2400 Hz tones)
• VZP — Virtual Zapping Phone
• UA — Universal Access
• WUSI — Wireless Universal Strike Interface
• STR — Synchronous Transmitter/Reciever
• LSI — Loop Start Interface
• WIXC — Wireless Internet eXpress Connection
• SCC — SuperComputer Center
• TIM — Telecom Idea Management
• TMD — Trunk Main Distributing
• ISM — Invocation State Machine
• VWM — Virtual Wire Manager
• GTI — Graphics, Text, and Images
• WRBS — Wireless Router Base Station

• MMS — Meteorological Measurement System
• TTD — Temporary Transmit Delay
• CAT — Charges, Access, and Terms
• DD — Digit Directory
• AT — ATtention command
• CP — Customer Premises
• LVZ — Line Variance Zero
• WCTB — Wireless Campus TestBed
• TNS — Terminating Noncritical Section
• ETC — Eligible Telecommunications Carrier
• LTA — Leased Transport Area
• WLHP — WireLess HeadPhone
• SEFL — Single-Ended Fault Locating
• DB — Dropped Burst
• O — Other
• RCS — Radio Cluster Server
• WFZ — Wire Free Zone
• FAST — Field Automated Subscriber Testing
• TOPS — Terahertz to Optical Pulse Source
• BP — Burst Period
• TBF — Telephone Band Filtering
• FT — Field Testing
• WEXK — Wireless EXit Kit
• GTA — GEORGIA TELECOMMUNICATIONS ASSOCIATION
• TSL — Transaction Sublayer
• ISD — Instituteuctional Systems Design
• QC — Quality Conversation
• TAP — Telecommunity Appalachian Project
• STS — Small Telephone System
• BT — Best Telecommunications
• RCVS — Recharge Card Voucher System
• SLM — Signal Line Measurement
• WBOX — Wireless in a Box
• QOB — Quality Of Burst
• TL — Telephone Lead
• CAS — Carrier Activity Sensor
• RCS — Real Communication Solution
• ACD — Apex Collaborative Dialing
• MAP — Manufacturers Application Protocol
• VMS — Virtual Machine System
• SMI — Subsystem Multiplicity Indicator
• RDY/BSY — Ready/Busy
• SAM — Sme Access For Mobile
• TVM — T1 Voice Module
• AL — Alignment Level
• TLC — Transparent Line Control
• AU — Audio Units
• WLDD — Wireless Location-Dependent Data
• CTR — Carrier Telegraph Receiver
• SLM — Signal Leakage Meter

• S — Subscriber
• PSS — Phone Search Space
• TELECOMMUTE — Telecommuters
• RDN — Relative Distinguishing Name
• CAS — Combined Antennae Services
• ITR — International Telecommunication Regulations
• GRT — Georgian Railway Telecom
• BPS — Baud per Second
• R — Rimorchio (trailer)
• RC — Rating and Certification
• PPC — Pay-Per-Call
• WIKS — Wireless Interactive Keypad System
• RA — Return Alarm
• RAS — Remote Access Services
• FC — Fiber Channel
• BOT — Baseline of Text
• WLDS — Wilkes Long Distance Service
• ACF — Advanced Communications Facility
• RC — Rudy's Cellular
• TO — Telecommunications Operator
• TCT — Tin Can Technology
• SA — Service Analysis
• SSS — Self-Synchronous Scrambling
• OC — Operations Channel
• BS — Burst Selector
• SCP — Service Commitment Period
• TPI — Tip-Party Identification
• TAC — Terminal Access Circuit
• BTS — Best Transmission Second
• SX — Simplex (one-way)
• TT — Touch Tone
• PD — Power Distribution
• TTR — Touch Tone Required
• WRAPS — Wireless Remote Audio Perimeter Sharing
• RI — Receiver Induced
• SC — Supervisory Center
• FL — Fiber Link
• RIM — Remote Integrated Mulitplexor
• WTRN — Wireless Token Ring Network
• VIS — Vodafone International Services
• SB — Service Billing
• IVS — Interactive Video Services
• IPS — Instituteuctions Per Second
• WURST — Wideband, Uniform Rate, Smooth Truncation
• CPP — Calling Party Pay
• SIF — Signaling Information Fields
• PWP — Plastic Wall Phone
• CTR — Covert Telephone Recording
• MCN — Mittweidaer CampusNet
• B — Bits

• SPF — Summertime Phone Functionality
• RTA — Rapid Thermal Annealing
• DS — Data Service
• AN — Accessory Number
• BS — Basic Service
• WWYP — Westford Web Yellow Pages
• WLHB — WireLine HandBook
• MBS — Meter Backflow Services
• MCP — Mobile Centered Paging
• EOC — End Of Contents
• SO — Serving Office
• SE — Status Enquiry
• SI — Service Indication
• TI — Time Independent
• VR — Variable Rate
• RDD — Random Digit Dialing
• MCA — Missed Calls Alert
• LG — Line Good
• WCZO — Wireless Communication Zoning Ordinance
• DE — Development Estimate
• LCWN — LiveCache Wireless Network
• ASB — Application-Specific Bit
• RTB — Remote Telephone Bell
• RSU — Required Service Utilization
• SU — Service Unlimited
• ITA — Inferior Telecommunications Apparatus
• TS — Telecom Server
• SCD — Strong Commit Dependency
• ER — EntityRelationship
• TC — Terminating Channel
• WOW — WithOut Wires
• RI — Ring Indicate
• SCM — Selected Communications Mode
• HS — Heterogeneous Services
• RB — Resource Bearer
• TT — Tiny Telephone
• YPBX — Ytelco Private Branch Exchange
• RB — Reverse Billing
• IMS — Internal Messaging System
• RD — Receive Delay
• SD — Software Distributor
• VZBB — Verizon BroadBand
• TP — Typical Provider
• TSR — Telephone Special Range
• SSC — Service Shortcut Changer
• T — Telecom
• RT — Refuse Transmission
• SR — Subscriber Ready
• TOC — Telecommunications Outdoor Connectors

Show More Results

100