COMMUNICATIONS STANDARDS REVIEW

CSR ACRONYM DEFINITIONS

This file has not been updated since July 2002. We are no longer keeping it current.

A-D

More Acronym Definitions:

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    1-1SDoC One Standard-One Test, Supplier's Declaration of Conformity
    2B1Q 2 Binary 1 Quaternary (U.S. line coding for ISDN
    2D-VLC Two Dimensional Variable Length Coding
    3G Third Generation
    3GPP Third Generation Partnership Project (ETSI)
    3WC Three Way Call
    4B3T 4 binary 3 trinary (European line coding for ISDN)
    10MDSL 10 Mbit/s DSL
    -A-
    A/DAnalog to Digital
    A&TArchitecture & Transport (DSL Forum Committee, formerly ATM)
    A/TTAnalog Tie Trunk (TIA-646-B)
    AAAAuthentication, Authorization and Accounting
    AACAdvanced Audio Coding
    AACCHAuxiliary Analog Control Channel
    AAL ATM Adaptation Layer
    AAL(D) Analog PSTN Access Line (Analog PBX Interface, TIA-646-B)
    AAL5-CUATM Adaptation Layer 5 Composite User
    AAPAlternative Approval Procedures (ITU)
    AASO Advanced Audio Server Override (package)
    AASB Advanced Audio Server Base
    AASS Advanced Audio Server Set (package)
    AAU Advanced Audio Package
    AAV Authentication Algorithm Version
    ABAC Aggregate Bearer Admission Control
    AbC Approval by Correspondence
    ABM Aggregate Bearer Measurement
    ABNF Augmented Backus-Naur Form
    ABR Average Bit Rate
    ABT Adaptive Block Transform
    AC Advisory Circular
    ac alternating current
    AC Alternating Current
    AC Arithmetic Coding
    AC Authentication Center
    AC Auto Configuration (DSL Forum)
    AC Automatic Callback
    ACA Adaptive Channel Allocation
    ACBO Automatic Cross Band Operation
    ACC Analog Control Channel
    ACC Automatic Configuration Client
    ACC Automatic Congestion Control
    ACCH Associated Control Channel
    ACD Automatic Call Distribution
    ACEAdvanced Coding Efficiency
    ACELPAdaptive CELP
    ACF Admission Confirm
    ACF Authentication Control Function
    ACG Automatic Code Gapping
    ACI Anonymous Call Interception
    ACIL Association of Independent Scientific, Engineering and Testing Firms
    ACK Acknowledgment
    ACKS Acknowledgments
    ACM Address Complete Message
    ACOS IEC Advisory Committee on Safety
    ACR Absolute Category Rating
    ACR Alternate Carrier Routing
    ACR Anonymous Call Rejection
    ACRE Authorization and Call Routing Equipment
    ACS Auto-Configuration Server
    ACS Automatic Configuration Service
    ACSB Amplitude Companded Single Side Band
    ACSE Association Control Service Element
    ACT Activation
    ACTA Administrative Council for Terminal Attachment (T1 and TIA)
    ACTE Approvals Committee for Terminal Equipment
    ACTSAdvanced Communications Technology Satellite
    AD Administrative Domain
    ADA Americans with Disabilities Act
    ADAAGADA Accessibility Guidelines
    AD-BES Administrative Back-End Services
    ADC Analog to Digital Converter
    ADDS Application Data Delivery Service
    ADHAGAd Hoc Authentication Group (TR-45.2)
    ADI Analog Devices Inc.
    ADL All Digital Loop (without underlying POTS or ISDN)
    ADL Automatic Determination of Location
    ADLC Asynchronous Data Link Control
    ADLG Automatic Determination of Location and Guidance
    ADLNB Association of Designated Laboratories and Notified Bodies (European)
    ADLU All Digital Loop masks
    ADMAll Digital Mode
    ADP Answer Detection Pattern
    ADPCMAdaptive Differential PCM
    ADS Asynchronous Data
    ADSI Analog Display Services Interface (Bellcore)
    ADSL Asymmetric Digital Subscriber Loop (Line)
    ADSLF ADSL Forum
    ADSL-R Asymmetric Digital Subscriber Loop (Remote)
    ADT Asynchronous Data Teleservice
    AEC Acoustic Echo Controller
    AECE Acoustic Echo Control Equipment
    AESAdvanced Encryption Standard-Rijndael
    AFE Analog Front End
    AFNOR Association francaise de normalisation (French Standardization)
    AG Access Grant
    AGC Audiographics Conferencing
    AGC Automatic Gain Control
    AGCH Access Grant Channel
    AGNI Advisory Group for Network Issues
    AHAG Ad Hoc Authentication Group (TR-45)
    AHES Ad Hoc Emergency Services (TR-45.2)
    AHG Ad Hoc Group
    aHIT! TIPIA merger into IMTC
    AHMMGAd Hoc Microcell/Microsystems Guidelines
    AHPAIAd Hoc PCS Air Interface Joint Group
    AHSOGAd Hoc on Self Organization Group
    AHWG Ad Hoc Working Group
    AI Air Interface
    AI Answer Indicator (V.8)
    AIC Advanced Intra Coding
    AIG Administrators Interest Group
    AIG Authentication Implementation Guide
    AIIM Association for Information and Image Management
    AIM Audio in Multimedia (EBU Project Group B)
    AIN Advanced Intelligent Network
    AINIATM Inter Network Interface
    AIS Alarm Indication Signal
    AIV Alternative Inter VLC
    a.k.a. Also Known As
    AKA Authentication and Key Agreement
    AL Answer List
    AL1 H.223 Adaption Layer 1
    AL-PDUAnswer List - Protocol Data Unit
    AL-SDUAnswer List - Service Data Unit
    ALC Automatic Level Control
    ALCE Automatic Level Control Equipment
    ALE Automatic Link Establishment Radios
    ALFApplication Level Framing
    ALI Automatic Location Identification
    ALIT Automatic Line Insulation Test
    ALT Automatic Link Transfer
    ALU Arithmetic Logic Unit
    AM Amplitude Modulation
    AM Assignment Message
    AMA Adaptive Motion Accuracy
    AMA/CDRAutomatic Message Accounting/Call Detail Recording
    AMD Amendment
    AMF Authentication Management Function
    AMPS Advanced Mobile Phone Service
    AMR Adaptive MultiRate
    AMR-WB Adaptive Multi-Rate Wideband
    AN Access Network
    AN Access Node
    AN Advisory Note
    ANAI Access Network Architecture and Interfaces
    ANATEL Agencia Nacional de Telecomunicacoes (Brazil)
    ANF Additional Network Feature
    ANF-CMN Additional Network Feature - Common Information (H.450.12)
    ANFP Access Network Frequency Plan
    ANI Automatic Number Identification
    ANOVAAnalysis of Variance Procedure
    ANS Answer Tone
    ANSam Answer Tone, amplitude modulated (V.8)
    ANSI American National Standards Institute
    ANT Access Network Transport (Q1/15)
    AOC Advice of Change
    AOC Advice of Charge
    AOC ADSL Overhead Channel
    AOC-D Advice Of Charge during a call
    AOC-E Advice Of Charge at the End of a call
    AOD Audio on Demand
    AOL America On Line (Commercial service)
    AP Advanced Prediction
    AP Application Protocols
    APCM Analog PCM Modem
    APCO Associated Public Safety Communications Officers, Inc.
    APD Photodiode with Avalanche gain
    APDU Application Protocol Data Unit
    APE Application Protocols Entities
    APEC Asian Pacific Economic Cooperation
    API Application Programming Interface
    APIC APCO Project 25 Interface Committee
    APLAC Asian Pacific Laboratory Accreditation Cooperation
    APON ATM PON
    APP Application Marker
    APS Asynchronous Protocol Specification
    AR Adaptive Reception Control
    AR Auto-Regressive
    AR Automatic Recall
    ARC Adaptive Reception Control
    ARC Alarm Reporting Control
    ARCH Access Response Channel
    ARDB Administrative Reference DataBase
    ARF Audio Resource Function
    ARIB Association of Radio Industries and Businesses (accredited standards setting body in Japan)
    ARJ Admission Reject
    ARLP Acoustic Reference Level Plan
    ARM Application Resource Manager
    ARQ Admission Request (H.225)
    ARQ Automatic Repeat Request
    arTISIL active and recent Testing & Interoperability WG and Interoperability Sub-Working Group Series/Items Logs
    ASAP As Soon As Possible
    ASC Automatic Service Configuration
    ASCII American Standard Code for Information Interchange
    ASE Applications Service Element
    ASIC Application Specific Integrated Circuit
    ASID Access, Searching and Indexing of Directories
    ASL Active Speech Level
    ASN Abstract Symbol Notation
    ASO Arbitrary Slice Ordering
    ASOG Access Service Ordering Guidelines
    ASON Automatic Switched Optical Networks (IETF)
    ASP Advanced Simple Profile
    ASP Application Service Provider
    ASR Automatic Speech Recognition
    ASTM formerly American Society of Testing and Measurement
    ASVD Analog SVD
    AT Access and Terminals (ETSI TC)
    AT Asynchronous Terminal
    ATA Analog Terminal and Access Project
    ATa Analog Working Group (ETSI TC AT)
    AT-A ETSI Access and Terminals Analog Working Group
    ATAABAnalog Technical Ad hoc Advisory Board
    ATAc ATA's Conventional Technology WG
    ATAe ATA's Enhanced Technology WG
    ATBCBArchitectural and Transportation Barriers Compliance Board
    ATC Analog Traffic Channel
    AT-D Access and Terminals Digital Working Group (ETSI)
    ATd Digital Working Group (TC AT)
    ATf Features Working Group (TC AT)
    ATF Administrative Task Force
    AT-F ETSI Access and Terminals Features Working Group
    ATG Access Transport Group (DSL Forum)
    ATIA Australian Telecommunications Industry Association
    ATIS Alliance for Telecommunications Industry Solutions
    ATM Asynchronous Transfer Mode
    ATMB-PON Asynchronous Transfer Mode Broadband Passive Optical Network
    ATMF ATM Forum
    ATMOVEAdaptive-Template Movement
    ATM Asynchronous Transfer Mode - Transmission Convergence
    ATM-Utopia Universal Test and Operations Physical Layer Interface for ATM
    ATO Analog Tandem Office (TIA-646-B)
    ATS Abstract Test Suite
    ATS Assigned Time Slot
    ATSC-DASE Advanced Television Systems Committee - DTV Application Software Environment
    ATU-CADSL Transceiver Unit - Central Office End
    ATU-R ADSL Transceiver Unit - Remote Terminal End
    ATV Advanced Television
    A-UAAuthentication User
    AuCAuthentication Center
    AuFAuthentication Function
    AV AudioVisual
    AVC Audio Visual Coding
    AVC Audiovisual Conferencing
    AVD Alternating Voice Data
    AVI Interactive Audiovisual Services
    AVIS Audio Visual Information Systems
    AVMMSAudioVisual and MultiMedia Services
    AVTAudio/Visual Transport
    AWG American Wire Gauge
    AWG Arbitrary Wave Form Generator (TR-30.3)
    AWGN Additive White Gaussian Noise
    AWI Alert With Info
    -B-
    BBi-directionally predicted
    B2B Business-to-Business
    B2C Business-to-Consumer
    B2G Business-to-Government
    B&G Bits&Gains (Q4/15)
    B&W Black and White
    BA Basic Access (ISDN)
    BAM Biconic Connector
    BAPT Bundesamt fur Post und Telekommunikation
    BARASETSI SAGE standard encryption algorithm for audiovisual services
    BAS Bit rate Allocation Signal
    BAU Base Audio Package
    BB Bandwidth Broker
    BBN Bulk Billing Number
    BB-RAS Broadband Remote Access Server
    BBS Bulletin Board System
    BC Basic Call
    BC Bearer Channel
    BCC Basic Control Channel
    BCCA Board Committee on Conformity Assessment
    BCCH Broadcast Control Channel
    BCD Binary Coded Decimal
    BCD Broadband Content Delivery
    BCDF Broadband Content Delivery Forum
    BCF Backward Control Field
    BCF Bearer Control Function
    BCH Bose, Chaudhuri, and Hocquengham
    BCM Back Channel Message
    BCTP Basic Call Transfer Protocol (SG11)
    BDBjøntegaard Delta
    BDBRS Bjøntegaard Delta Bit Rate Savings
    BD-PSNR Bjøntegaard Delta PSNR
    BDS Blank Detail Specification
    BEBorder Element
    BEM Big Emerging Markets
    BER Bit Error Rate
    BERT Bit Error Rate Test
    BES Back-End Services
    BEST Back-End Service Transaction
    (B)FER Burst Frame Error Rate
    BF Bearer Function
    BFI Bad Frame Indicator
    BFOC Bayonet Fiber Optic Connector
    BFT Binary File Transfer
    BGN Background Noise Conditions
    BGP Border Gateway Protocol (IETF)
    B-HLI Broadband High Layer Information
    BICC Bearer Independent Call Control (ITU-T SG11)
    BICSI Building Industry Consulting Services International
    BID Billing ID Numbers
    BINTERMS Basic Interoperability for Terminals for Telematic Services
    B-ISDNBroadband ISDN
    BISSBasic Interoperable Scrambling System (EBU)
    BISS-EEncrypted Basic Interoperable Scrambling System (EBU)
    B-ISUPBroadband ISDN User Part
    BITB Boulder Industry Test Bed
    BLER Block Error Rates
    BLERf Error Free Block Rate
    BLESBroadband Loop Emulation Service
    B-LLI Broadband Lower Layer Information
    BME Block based Motion Estimation
    BMI Base Station, Mobile Switching Center, and Interworking Function
    BMMBroadcast-Based Multimedia
    BMSC Base Station Manufacturer Code
    BNC IDBackbone Network Connection Identifier
    BNF Backus-Naur Form
    B-NT Broadband Network Termination
    BNT Binary File Transfer
    BNTF Bi-National Task Force
    BNTG Bi-National Task Group
    BNWGBi-National Working Group
    BOBusiness Office
    BOF Birds of a Feather
    BoD Board of Directors (DSL Forum)
    BOMA Building Owners & Managers Association
    BONDINGBandwidth On Demand Interest Group (TR-41)
    BOSBusiness Object Summit
    BPBoundary Point (Q14/9, MediaHomeNet)
    BPI+Baseline Privacy Interface Plus
    B-PISN Broadband PISN
    B-PON Broadband Passive Optical Network
    BPTC Block-Product-Turbo-Codes
    B-QSIG Broadband QSIG
    BRA Basic Rate Access
    BRAN Broadband Radio Access Networks (ETSI TC)
    BRAS Broadband Remote Access Server
    BRI Basic Rate Interface
    BRKACKBreak Acknowledge frame (V.42)
    BRMBit Repetition Message
    BRQ Bandwidth Request
    BS Base Station
    BS Broadcasting Service (Sound) (ITU-R Recommendations)
    BSC Base Station Controller
    BSC Binary Symmetric Channels
    BSD Berkeley Software Design (Unix Operating System)
    BSMAPBase Station Management Application Part
    BSMC Base Station Manufacturer Code
    BSMI Bureau of Standards, Metrology and Inspection
    B-SMS Broadcasts Short Message Service
    BSN Broadband Service Node (Nortel)
    BSR Board of Standards Review (ANSI)
    BSS Base Station System
    BSS Broadcasting-Satellite Service
    BST Broadcast SMS Teleservice
    BT British Telecom (United Kingdom PTT)
    BT Broadcasting Service (Television) (ITU-R Recommendations)
    BTA Basic Trading Area
    BTC Business Telecommunications Committee (ETSI)
    BTM Basic Transfer Mode
    BTS Base Transceiver System
    B-UNI Broadband User Network Interface
    B-VOP Bidirectional Video Object Planes
    B/WBlack and White
    BWC Bandwidth Control
    BWS Building Wiring Standard
    -C-
    C&I Commands and Indications
    C&S Control and Signaling (ATM Forum Working Group)
    CA Channel Aggregation
    CA Communication Application (T.611)
    CA Conformity Assessment
    CAB Conformity Assessment Body
    CABA Continental Automated Buildings Association (North America's Home and Building Automation Association)
    CABAC Context-based Adaptive Binary Arithmetic Coding
    CAC Carrier Access Code
    CAC Connection Admission Control
    CAD Computer Aided Design
    CAGJES Canadian Advisory Group on Joint Electrical Safety Committee
    CAI Common Air Interface
    CAL Common Application Language
    CALEACommunications Assistance for Law Enforcement Act
    CAMA Centralized Automatic Message Accounting
    CANACINTRACamara Nacional de la Industria de Transformacion (Mexico)
    CANIECECamara Nacional de la Industria Electronica Y de Communicaciones Electricas (Mexico)
    CAP Carrier-less Amplitude modulation Phase modulation
    CAPI Common API (ISDN)
    CAPCSCellular Auxiliary Personal Communications Service
    CARECarrier Access Records Exchange
    CAS Channel Associated Signaling
    CAS Customer Alert Signal
    CASCO Committee on Conformity Assessment (ISO)
    CASE Conformity Assessment System Evaluation (NIST)
    CASS Common Air Satellite Structure
    CAT Cellular Action Team (ECSP committee)
    CATS Consortium for Audiographics Teleconferencing Standards
    CATV Cable Television
    CAVE Cellular Authentication and Voice Encryption Algorithm
    CAWG Conformity Assessment Working Group (Trilateral)
    CB Call Barring (TIA TR-34)
    CB Certification Body
    CB Citizen Band
    CBC Call Bearer Control
    CBC Cipher Block Chaining
    CBEMAComputing Business Equipment Manufacturers Association (see ITI)
    CBPCoded Block Pattern (H.261)
    CBPCMCoded Block Pattern - Chrominance
    CBPCCoded Block Pattern for Chrominance
    CBPYCoded Block Pattern for Luminance
    CBR Constant Bit Rate
    CC Call Control
    CC Common Carrier
    CC Communication Capability field
    CC Conference Call
    CC Continuity Check (Rec. I.610)
    CC Control Channel
    CCA Common Cryptographic Algorithm
    CCAT CDMA Card Application Kit
    CCB Common Carrier Bureau
    CCBS Completion of Calls to Busy Subscribers
    CCI Connection Control Interface
    CCIR Comite consultatif international des radiocommunications
    CCITT Comite consultatif international telegraphique et telephonique
    CCM Call Connection Management
    CCM Client Connection Manager
    CCNR Completion of Calls on No Reply
    CCR Call Connect Reliability
    CCR Comparison Category Rating
    CCS Common Channel Signaling
    CCSN Common Channel Signaling Network
    CCSRL Control Channel Segmentation and Reassembly Layer
    CCT Channel Check Test
    CCT Consultative Committee - Telecommunications (Trilateral)
    CD Committee Draft
    CD Communication Device
    CDCompact Disk
    CD-ROMCompact Disk-Read Only Memory
    CDCP Call Detail Collect Point
    CDF Cumulative Distribution Function
    CDG CDMA Development Group
    CDGP Call Detail Generation Point
    CDH Cooperative Document Handling
    CDIS Call Detail Information Source
    CDL Coded Digital control channel Locator
    CDMA Code Division Multiple Access
    CDN Content Distribution Network
    CDPD Cellular Digital Packet Data
    CDR Call Detail Recording
    CDRP Call Detail Rating Point
    CDS Caller Display Signaling
    CDTAC FCC Consumer/Disability Telecommunications Advisory Committee
    CDV Committee Draft for Vote, IEC
    CE Capabilities Exchange
    CE Core Experiment
    CEA Consumer Electronics Association
    CEASD Common ETSI Approach to Standards Development
    CeBIT Trade show in Hannover, Germany
    CEBus Consumer Electronics Bus
    CEC Canadian Electric Code
    CEC European Committee for Standardization
    CED Called Station Identification (T.30)
    CEG Card Expert Group (ETSI)
    CEG Integrated Circuit Card Expert Group
    CELP Code Excited Linear Prediction
    CEN Commission Europeenne de Normalisation (European Standards Committee)
    CENELECCommission Europeenne de Normalisation Electrotechnique (European Electrotechnical Standards Committee)
    CEOC Clear Embedded Operations Channel
    CEPT Conference of European PTTs
    CER Cell Error Ratio
    CESCircuit Emulation Service
    CESID Caller Emergency Station Identification
    CEXT Central Office End Crosstalk
    CF Call Forwarding
    CF Center Frequencies
    CF Communication Functions
    CFA Carrier Failure Alarms (s)
    CFBL Call Forward Busy Line/ Don't Answer
    CFI Calling Feature Indicator
    CfP Call for Proposal
    CFP Computer Fax Protocol
    CFP Cypher Feedback
    CFR Code of Federal Regulations
    CFR Confirmation to Receive
    CFU Call Forwarding - Unconditional
    CG Correspondence Group
    CGI Control Grid Interpolation
    CH Compare HDLC
    CHAP Challenge Handshake Authentication Protocol
    CHASE A class of algorithms for decoding block codes, after D. Chase
    CHSCandidate Harmonized Standard
    CI Call Indicator (V.8)
    CI Calling Identity
    CI Characteristic Impedance
    CI Count Indicator
    CI Customer Installation
    CI Customer Interface
    C/I Carrier to Interference Ratio
    CIA Calling subscriber Internet Address
    CIAJ Communications Industry Association of Japan
    CIB Configuration Information Base
    CIC Circuit Identifier Code
    CICES Canadian Interference Causing Equipment Standard
    CICG Centre International de Conferences Geneve (building used by ITU)
    CID Caller Identification
    CIDCWCalling Identity Delivery on Call Waiting
    CIDR Classless Inter-Doman Routing
    CIELAB a device-independent color space
    CIF Common Intermediate Format
    CIG Calling Subscriber Identification
    CILC Canadian Interconnection Liaison Committee
    CIM Common Information Model
    CIP Component-Independent Palette
    CIR Carrier to Interference Ratio
    CISC CRTC Interconnection Steering Committee
    CISPR International Special Committee on Radio Interference
    CISPR/I Subcommittee of CISPR dealing with EMC of information technology, multimedia equipment, and receivers
    CIT Charge-Rate Indication Teleservice
    CITEL Comision Internanericana de Telecomunicaciones
    CJ CM terminator
    ckt circuit
    CL Capabilities Select (see CR)
    CLAD Cell Assembly/Disassembly
    CLASS Bellcore service mark for signaling features such as Caller ID
    CLEC Competitive Local Exchange Carriers
    CLEI Common Language Equipment Identifiaction
    CLI Calling Line Identification
    CLID Calling Line Identity
    CLIP Calling Line Identification Presentation
    CLIP Calling Line ID Parameter
    CLLI Common Language Location Identifier (Telcordia)
    CLNP Connectionless Network Protocol
    CLR Capabilities List Request
    CLR Cell Loss Ratio
    CLR Circuit Layout Record
    CM Cable Modem
    CM Call Manager
    CM Call Menu (V.8)
    CM Channel Management
    CM Common Mode
    CM Connection Management
    CMB CRC Message Block (TIA-464-C)
    CMC Common Mail Call
    CMC Common Messaging Call
    CME Circuit Multiplication Equipment
    CME Communications Management Entity
    CMI Controlled Mode Idle
    CMIP Common Management Information Protocol
    CMIS Common Management Information Services
    CMISE Common Management Information Service Element
    CMMRCommon Mode Rejection
    CMMRDCellular Microcell/Microsystem Requirements Document
    CMN Common information
    CMODESConfidentiality Modes
    CMOS Comparison Mean Opinion Score
    CMOS Complimentary Metal Oxide Semiconductor
    CMRS Commercial Mobile Radio Services (U.S.)
    CMS Call Management Server
    CMS Call Management Signaling
    CMS Circuit Multiplication System
    CMSS Call Management Server Signaling protocol
    CMT Cellular Messaging Teleservice
    CMTS Cable Modem Termination System
    CMTSDCellular Mobile Telephone Service Descriptions
    CMTT previous Joint CCIR/CCITT Study Group for Television and Sound Transmission
    CMY Cyan, Magenta, Yellow
    CMYK Cyan, Magenta, Yellow, Black
    CN Corporate Network
    CNAD Calling Name Delivery
    CNAP Calling Name Presentation
    CNAR Calling Name Restriction
    CNG Calling Tone (T.30)
    CNG Comfort Noise Generator
    CNI Calling Number Identification
    CNI Comfort Noise Insertion
    CNID Calling Number Identification
    CNIP Calling Number Identification Presentation
    CNIP Calling Name Identity Presentation
    CNIR Calling Number Identification Restriction
    CNP Connection Negotiation Protocol
    CNR Carrier to Noise Ratio
    CNRP Common Name Resolution Protocol
    CO Central Office
    COFETEL Comision Federal de Telecomunicaciones de Mexico
    CoIP Conferencing over IP (IMTC Activity Group)
    COMM comm.drv for Microsoft Windows
    CONNEG Content Negotiations (IETF)
    COO Cell of Origin
    COPEE Council on Office Products Energy Efficiency
    COPS Common Open Policy Service
    CORBA Common Object Request Broker Architecture
    CORD Cibernet On-line Roaming Database
    CoS Class of Service
    COS Corporation for Open Systems
    COS-OSTCorporation for Open Systems Executive Industry Group
    COSP Customer Owned Outside Plant
    COST Co-Operation in the field of Science and Technology research
    COTS Commercial Off-The-Shelf
    CP Communications Protocol
    CP Continuous Presence (H.243)
    CP Customer Premises
    CP Cyclical Prefix
    CPA Combined Paging/Access
    CPAN Customer Premises Area Network
    CPAP Customer Premises Access Profile
    CPCS Common Part Convergence Sublayer
    CPE Customer Premise Equipment
    CPEVCity Pair Polyethylene PVC
    CPF Compatible Protocol Field
    CPF Custom Picture Format
    CPH Call Party Handling
    CP-IWF Customer Premises - InterWorking Function (ATM Forum)
    CPL Call Processing Language
    CPM Conference Preparatory Meeting
    CPM Continuous Presence Multipoint
    CPN Calling Party Number
    CPN Customer Premise Network
    CPS Common Part Sublayer (ATMF)
    CPSII Communications Protocol Stack Independent Interface
    CPS-TC Control Specific Transmission Convergence
    CPT Cellular Paging Teleservice
    CPU Central Processing Unit
    CQ CAS Signal
    CQ Communication Quality
    CQP IPCable2Home QoS Portal
    CQPSK Compatible Differential Offset Quadrature Phase Shift Keying (Digital Modulation)
    CR Capabilities Request (see CL)
    CR Change Request (TIPHON)
    CRe Capabilities Request sent by autoanswering station at call initiation
    CRC Cyclic Redundancy Code
    CRFP Cordless Radio Fixed Parts
    CR-LDP Constraint-based Routed Label Distribution Protocol (a protocol within MPLS)
    CRP Command Repeat
    CRT Cathode Ray Tube
    CRT Chinese Remainder Theorem
    CRTC Canadian Radio and Television Commission
    CRTS Cellular Radio Telecommunications Service
    CRV Call Reference Value
    CS Canadian Standard
    CS Circuit Switched
    CS1 BICC Capability Set 1
    CS2 BICC Capability Set 2
    CS-ACELP Conjugate Structure ACELP
    CS-PDUConvergence Sublayer - Protocol Data Unit
    CSA Called Subscriber Internet Address
    CSA Canadian Standards Association
    CSA Carrier Serving Area
    CSC Call Signalling Channel
    CSCI Computer Software Configuration Item
    CSD Coordinated Standards Document
    CSDN Circuit Switched Data Network
    CSD-P Circuit Switched Data, Point-to-Point Service
    CSE Communication Service Equipment
    CSEP Call Setup Error Probability
    CSF Signaling Control Function
    CSFP Call Setup Failure Probability
    CSI Construction Specification Institute
    CSMA/CD Carrier Sense Multiple Access/Collision Detection
    CSN Circuit-Switched Network
    CSO Composite Second Order distortion
    CSO Curvature of the Second Order
    CSPP Computer System Policy Project
    CSR Communications Standards Review
    CSS Communication Systems Security
    CSS Communications Standards Summary
    CSS Composite Source Signal
    CSS Convolutional Spectral Shaping
    CSTA Computer Supported Telecommunications Applications
    CSU Customer Service Unit
    CT Call Trace
    CT2 Cordless Telephone 2 (ETSI)
    CTA Council For Terminal Attachment
    CTB Composite Triple Beat
    CTE Connected Telecommunications Equipment
    CTIA Cellular Telecommunications Industry Association
    CTE Connected Telecommunications Equipment
    CTE Connected Terminal Equipment
    CTF Consumer Telephone Forum (Telcordia)
    CTIA Cellular Telecommunications Industry Association
    CTI Computer Telephony Integration
    CTM Cellular Text Telephone Modem
    CTM Cordless Terminal Mobility
    CTN Corporate Telecommunication Networks
    CTO Chief Technical Officers
    CTP Common Transport Protocol
    CTR Common Technical Requirements
    CTRMP Cordless Telephone Range Measurement Performance
    CTX Centrex
    CU Composite User
    CUG Closed User Group
    CuT codec under test
    CV Code Violation
    CVoADSL Channnelized Voice over ADSL
    CVoDSL Channnelized Voice over DSL
    CVoSDSL Channnelized Voice over SDSL
    CVSD Continuous Variable Slope Detection
    CW Call Waiting
    CW Continuous Wave
    CWD Call Waiting Deluxe
    CWID Call Waiting ID
    CWP Cost Work Program
    CYL Complex stutter dial report
    -D-
    D-AMPSDigital AMPS
    D/A Digital to Analog
    D/S Downstream
    D/TT Digital Tie Trunk
    DA Delegated Authority
    DAA Data Access Arrangement
    DAB Digital Audio Broadcast
    DAC D/A Converter
    DAL Digital Access Line
    DAM Diagnostic Acceptability Measurement
    DANS Directory and Name Service
    DANS Distributed Access Node System
    DAP Document Application Profile
    DAS Door Answering System
    DASEDTV Application Software Environment
    DAT Digital Audio Tape
    DAVICDigital Audio-Visual Council
    DAWS Digital Advanced Wireless Service
    DB Data Base
    DBA Dynamic Bandwith Assignment
    DBM Dual Bitmap
    DBMSData Base Management System
    DBS Direct Broadcast Satellite
    DC Data Compression
    DC Direct Current (steady state)
    DC Directionality Classification
    DCA Dynamic Capacity Allocation
    DCC Data Country Code
    DCC Digital Control Channel
    DCCH Digital Control Channel
    DCD Data Carrier Detect
    DCE Data Circuit terminating Equipment
    DCE Digital Cellular Equipment
    DCF Dispersion Compensation Fibers
    DCME Digital Circuit Multiplication Equipment
    DCMS Digital Circuit Multiplication Systems
    DCN Disconnect (T.30 )
    DCP Datagram Control Protocol (IETF)
    DCP Digital Connectivity Probing
    DCOR Draft technical Corrigendum (ISO/IEC)
    DCR Degradation Category Rating
    DCS Digital Cellular System
    DCS Digital Command Signal (T.30)
    DCS Digital Crossconnect System
    DCT Data Calling Tone
    DCT Discrete Cosine Transform
    DCT-U Digital Cordless Telephone - U.S.
    DDIDirect Dialing In
    DDoSDistributed Denial of Service
    DDR Document Discrepancy Report
    DDS Digital Data Service
    DEC Digital Extended Command (proposed T.30 extended negotiations)
    DECT Digital Enhanced Cordless Telecommunications (ETSI)
    DEG Draft ETSI Guide
    DELT Double-Ended Loop Testing
    DEN Directory Enabled Networks
    DEO Digital End Office
    DER Digital Extended Request (proposed T.30 extended negotiations)
    DES Data Encryption Standard (U.S.)
    DES Digital Extend Signal (T.30)
    DES Draft European Standard
    DF Data Compression Format (T.class2)
    DF Deblocking Filter
    DFD Displaced Frame Difference
    DFE Decision Feedback Equalizer
    DFP Distributed Functional Plane
    DFPA Defense Fire Protection Association
    DF-STPDeFault Signal Transmission Parameters
    DG Drafting Group
    DGK Directory GateKeeper
    DGN Director General de Normas (SECOFI, Mexican Standards Organization)
    DGS Digital Station
    DH Diffie-Hellman protocol
    DHC Dynamic Host Control
    DHCP Dynamic Host Control Protocol (RFC 2131)
    DHE Document Handling Equipment
    DI Digital Interface
    DI Distribution Interface
    DIAMETER IETF protocol used for authentication, authorization and accounting
    DIC Delay Interval Compensation
    DID Direct Inward Dialing
    DIG ISDN compatible Digital Station and tie trunk (TIA-646-B)
    DIL Digital Impairment Learning
    DIMRSDigital Integrated Mobile Radio System
    DIN Deutsche Institut fur Normung (German Standardization Institute)
    DIS Digital Identification Signal
    DIS Draft International Standard (ISO)
    DISA Defense Information Systems Agency
    DISXML Extended Markup Language
    DJGPP MSDOS port of gcc
    DKTS Digital Key Telephone Station
    DLC Digital Loop Carrier
    DLC Dynamic Load Control
    DLCI Data Link Connection Identifier
    DLL Dynamic Link Library
    DLP Data Protocol (H.DLP)
    DM Differential Mode
    DMA Direct Memory Access
    DMH Data Message Handler
    DMI Desktop Management Interface
    DMI Draft Miscellaneous Work Item (ETSI)
    DMIF DSM-CC Multimedia Integration Framework
    DMOS Degradation MOS
    DMP Downlink Measurement Protocol
    DMT Discrete MultiTone
    DMTF Desktop Management Task Force
    DMV Differential Motion Vector
    DN Directory Number
    DND Do Not Disturb
    DNI Digital Negotiation Information Signal
    DNIS Dialed Number Identification Service
    DNK Digital Not acKnowledge
    DNS Domain Name Server
    DoC Declaration of Conformity
    DOC Department of Commerce
    DOC Department of Communications (Canada)
    DOCSF Display Oriented Color Space for Facsimile
    DOCSIS Data Over Cable Service Interface Specification
    DoD Department of Defense (U.S.)
    DOE Department of Energy (U.S.)
    DOL Data Off-Loading
    DoS Denial of Service
    DOS Department of State (U.S.)
    DP Data Privacy
    DP Data Pump
    DP Dial Pulse
    DPA Data Privacy Algorithm
    DPA Document Printing Application
    DPBX Digital PBX
    DPCM Digital PCM Modem
    DPI Dots Per Inch
    DPL Digital Power Line (Q1/15)
    DPS Data Partitioned Slice
    DPS Dynamic Power Save
    DPNSS Digital Private Network Signaling System
    DPSK Differential Phase Shift Keying
    DPT Distribution-Preserving Tomlinson
    DQoS Dynamic Quality of Service
    DQUANT Field for modified quantization mode (H.263+)
    DR Discrepancy Report
    DRA Dynamic Rate Adaptation
    DRC Dynamic Rate Change
    DRM Digital Rights Management
    DRQ Disengage Request
    DRPear Drum Reference Point
    DRRDynamic Rate Repartitioning
    DRT Diagnostic Rhyme Test
    DRUMS Detailed Revision/Update of Message
    DS0 64 kbit/s Channel
    DS1 1.544 Mbit/s T1 Interface
    DS3 44.736 Mbit/s T3 Interface
    DSA Directory System Authentication
    DSAA DECT Standard Authentication Algorithm
    DSAP Data Services Access Profile
    DSAT Digital Supervisory Audio Tone
    DSC DECT Standard Cipher
    DSCDedicated Signaling Channel
    DSCP Differentiated Services Code Point
    DSI Digital Speech Interpolation
    DSL Digital Subscriber Line
    DSL Document SeLection
    DSLAM DSL Access Multiplexer
    DSLFDSL Forum
    DSL-TILCDSL Test Implementation Liaison Committee (Japan)
    DSM-CCDigital Storage Media - Command and Control
    DSMCCDigital System Multimedia Communication Control
    DSN Delivery Status Notification
    DSN Disposition Service Notification
    DSNG Digital Satellite News Gathering
    DSP Digital Signal Processing
    DSR Data Set Ready
    DSR Distributed Speech Recognition
    DSR Dynamic Symbol Reordering
    DSREQ Data Service Request
    DSS1 Digital Subscriber Signaling 1
    DST Destination host
    DSU Data Service Unit
    DSV Distributed Speaker Verification
    DSVD Digital SVD
    DSX Digital Signal Cross-Connect
    DT Dual Tone
    DTA Digital Terminal and Access Project (ETSI)
    DTAABDECT Technical Advisory Ad hoc Board
    DTAM Document Transfer Access Method
    DTAP Direct Transfer Application Part
    DTC Digital Traffic Channel
    DTC Digital Transmit Command
    DTC Domain Traffic Class
    DTCXDouble Transcompression
    DTD Document Type Definition
    DTE Data Terminal Equipment
    DTGDigital TV Group (UK)
    DTIF Disabilities Issues Task Force
    DTL Designated Transit List
    DTM Dynamic synchronousTransfer Mode
    DTMF Dual Tone Multi Frequency
    DTR Data Terminal Ready
    DTR Draft Technical Report (ETSI)
    DTS Definitive Telefax Standard
    DTVDigital Television
    DTX Discontinuous Transmission
    DUT Device Under Test
    DV Digital Video
    DVB Digital Video Broadcasting
    DVB-CSADigital Video Broadcasting - Common Scrambling Algorithm
    DVB-MUGDigital Video Broadcasting MHP Umbrella Group
    DVB-S Digital Video Broadcasting - Satellite
    DVB-T DVB Terrestrial
    DVCC Digital Verification Color Code
    DVD Digital Versatile Disk (also Digital Video Disk)
    DVEM Differential Vector Error Magnitude
    DWDM Dense Wavelength Division Multiplexing

    More Acronym Definitions:

  • E-H

  • I-M

  • N-R

  • S-Z


  • Acronym Definitions last updated July 2, 2002. We are no longer keeping it current.


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