Michael Hegenbarth/Ralf-Rainer Damm; Stand: 8. Oktober 2001Abkürzungsverzeichnis Text- und Datenkommunikation, Elektronik, Internet, industrielle undAbkürzungsverzeichnis Text- und Datenkommunikation, Elektronik, Internet, industrielle undAbkürzungsverzeichnis Text- und Datenkommunikation, Elektronik, Internet, industrielle undAbkürzungsverzeichnis Text- und Datenkommunikation, Elektronik, Internet, industrielle und

wissenschaftliche Institutionen, Standardisierung, Deutsche Telekomwissenschaftliche Institutionen, Standardisierung, Deutsche Telekomwissenschaftliche Institutionen, Standardisierung, Deutsche Telekomwissenschaftliche Institutionen, Standardisierung, Deutsche TelekomEnthält jetzt über 3900 AbkürzungenEnthält jetzt über 3900 AbkürzungenEnthält jetzt über 3900 AbkürzungenEnthält jetzt über 3900 Abkürzungen

(List of Abbreviations in Text and Data Communications, Electronics,(List of Abbreviations in Text and Data Communications, Electronics,(List of Abbreviations in Text and Data Communications, Electronics,(List of Abbreviations in Text and Data Communications, Electronics,Internet, Industrial and Scientific Institutions, Standardization, DeutscheInternet, Industrial and Scientific Institutions, Standardization, DeutscheInternet, Industrial and Scientific Institutions, Standardization, DeutscheInternet, Industrial and Scientific Institutions, Standardization, Deutsche Telekom) Telekom) Telekom) Telekom)

Comprises now more than 3900 abbreviationsComprises now more than 3900 abbreviationsComprises now more than 3900 abbreviationsComprises now more than 3900 abbreviations

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0

1

2

2G Second Generation

3

3-D dreidimensional3DES Triple Data Encryption Standard3G Third Generation (of Mobile Communications)3PTY Three-Party (Konferenzschaltung)

4

5

6

7

8

9

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A

A... Application ...AA Application AdapterAAA Authentication, Authorization, AccountingAAC Advanced Audio CodingAAI Application Attachment InterfaceAAL ATM Adaptation LayerAAL5 ATM Adaptation Layer 5AAM Application Attachment ModuleAAP Alternative Approval Procedure (ITU-T)AAR Automatic Alternate RouteABA American Banks AssociationABG AbschlussbaugruppeABI Application Binary InterfaceABM Asynchronous Balanced ModeABR - Available Bit Rate (ATM)

- Area Border RouterABT AbtastschaltungAC - Authentication Center (GSM)

- Audio CodecACAP Application Control Access ProtocolACC - Advanced Computer Communications

- Automatic Contur Control- Access Control Component

ACD Automatic Call DistributionACF Access Control FieldACK Acknowledge (ASCII-Zeichen Nr. 06h)ACM - (Communications of the) Association of Computing Machinery

- Association Control Procotocol MachineACME Analogue Circuit Multiplexing EquipmentACO Alarm Cut-OffACOS Advisory Committee on Safety (IEC)ACPI Advanced Configuration and Power Management Interface (Microsoft)ACS Architekten-ComputersystemeACSB Amplitude Compandored Single SidebandACSE Association Control Service ElementACTE Approval Committee for Terminal Equipment (ETSI)ACTS Advanced Communications Technologies and Services (EU-Forschungsprojekt)AD AddendumADC Analogue-to-Digital ConverterADCCP Advanced Data Communication Control Procedure (identisch mit HDLC, von ANSI)ADCP Application Dependent Convergence ProtocolADF Automatic Document Feeder (Vorlageneinzug)ADI - L'Agence de l'Informatique, Paris

- Autodesk Device Interfaceadi Anwenderverband Deutscher Informationsanbieter e.V.ADLNB Association of Designated Laboratories and Notified BodiesADM - Asynchronous Disconnected Mode

- Add-Drop Multiplexer- Auftrags- und Datenmanagement (DTAG)

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ADMD Administration Management Domain (MHS),(Öffentlicher Versorgungsbereich)

ADO Active Data ObjectADP Association of database producersADPCM Adaptive Differential Pulse Code Modulation (ITU-T G.726)ADR Anforderungsgerechtes Darstellen und Modellieren durch Repräsentierende

ElementeADSL Asymmetric Digital Subscriber LoopADT Abstract Data TypeAdV Arbeitsgemeinschaft der Vermessungsverwaltungen der Länder der Bundesrepublik

DeutschlandADW Analog-Digital-Wandler (= ADC)AE Application EntityAEA Anschalteeinheit, analogAE-ADDR Applicaton Entity AddressAEB Auxiliary Equipment BackplaneAEC - Architecture, Engineering and Construction

- Acoustic Echo CancellerAED Abfrageeinrichtung für Fernsprechanschlüsse mit DatenverkehrAEEC Airlines Electronic Engineering CommitteeAEEI Asociacion Española de Empresas de InformacionAEG Allgemeine Elektrizitäts-GesellschaftAEI Application Entity InvocationAEK Anschalteeinrichtung für KartentelefoneAEM Access System Element ManagerAES - Application Environment Services

- Advanced Encryption StandardAEU Auxilliary Equipment UnitAFC - Automatic Frequency Control

- Antiferromagnetically Coupled MediaAFCEA Air Force Communication Engineers AssociationAFI Authority and Format IdentifierAFM - Adobe Font Metrics

- ATM Feeder MultiplexerAFNOR Association Française de NormalisationAfOD Anschluss für Online-Dienste-AnbieterAG Advisory Group (ISO)AGC Automatic Gain ControlAGFIZ Arbeitsgemeinschaft der FachinformationszentrenAGP Advanced Graphics PortAGRU Automatische Ansage geänderter RufnummernAGt AnschlussgerätAHC Advanced High Speed CMOS (Texas Instruments)AI Artificial IntelligenceAIA Aerospace Industries AssociationAICGS American Institute of Contemporary German StudiesAIDC Automatic Identification and Data Collection EquipmentAIDCP Application Interface Dependent Convergence ProtocolAIF Anweisungen für den internationalen FernsprechdienstAIIP Associazione Italiana Internet ProvidersAIN Advanced Intelligent NetworkAIS Alarm Indication SignalALB Analog Loopback

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ALBLA Aktualisierte Leitungsbedarfsliste Ausland (DTAG)ALC - Automatic Level Control

- Access Line ConcentratorALGOL Algorithmic LanguageALLA Allied Long Lines AgencyALM Alarm Interface ModuleALMI ANSI LMI StandardAM - Amplitudenmodulation

- Auftragsmanagement (DTAG)AMA Automatic Message AccountingAMAE Application Management Application EntityAMCS All Media Cabling SystemAMEV Arbeitskreis Maschinenwesen und Elektrotechnik staatlicher und kommunaler

VerwaltungenAMI Alternate Mark Inversion (Code)AMPS Advanced Mobile Phone SystemAMR Audio Modem RiserANGA Verband privater Kabelnetzbetreiber e. V.ANGELA Angebotsliste Ausland (DTAG)ANI Automatic Number IdentificationANIDA Projektgruppe für Aquisition und Beratung vom Kunden bei Anwendernetzen mit

internationalem Text- und DatenverkehrANIS Analoger Telefonanschluss an einem vermittelnden Netzknoten (VNK) des ISDNANO Access Network OperatorANRS Anrufsatz für den Übergang vom Fernsprechnetz zu DatenanwendungenANSI American National Standards InstituteANT Access Network TransportANTIOPE Aquisition Numérique et Télévisualisation d'Images Organisées en Pages d'Ecriture

(entspricht Videotext)ANUIT Associazione Utenti Italiani de TelecommunicazioneAOC-D Advice of Charge; charging information during the callAOC-E Advice of Charge; charging information at the end of the callAOC-R Advice of Charge; charging inforamtion on user requestAOC-S Advice of Charge; charging information at call-setup timeAODI Always On – Dynamic ISDN (USA)AOL America OnlineAON Aktives Optisches NetzAOW Asia Oceania WorkshopAP - Access Point (to the PSTN/ISDN) (Netzanschaltepunkt)

- Application ProcessAPC American Power Conversion Corp.APCI Advanced Configuration and Power Interface (Microsoft)APDU - Application Protocol Data Unit

- Alarm and Power Distribution UnitAPE Abgesetzte periphere EinheitAPI - Association Phonétique Internationale (Lautschrift)

– Application Programming InterfaceAPNIC Asian-Pacific Network Information CenterAPOP Authenticated Post Office ProtocolAPPC Advanced Program-to-Program CommunicationAPPN Advanced Peer-To-Peer NetworkAPRS Automated Position Reporting SystemAPS - Arbeitsplatzsystem (DTAG)

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- Automatic Protection SwitchingAPT Automatically Programmed ToolAQSC Automatic Quality of Service ControlARC Atlantic restoration conferenceArcos Americas region Caribbean ring systemARA Alarm Receiving AttentionARD Arbeitsgemeinschaft der öffentlich-rechtlichen Rundfunkgesellschaften DeutschlandsARI Autofahrer-Rundfunk-InformationssystemARIN American Registry for Internet NumbersARISE A Re-usibility Infrastructure for Software Engineering

(RACE R1021)ARM Asynchronous Response ModeARP Address Resolution ProtocolARPA Advanced Research Projects AgencyARPU Average Revenue per UserARQ Automatic Repeat RequestARS Action Request System (DTAG)ART Autorité de Régulation des TélécommunicationsARX Alternate Routeing Expert SystemAS Autonomous SystemAsB Anschlussbereich (DTAG)ASBR Autonomous System Border RouterASCII American Standard Code for Information InterchangeASE Application Service ElementASF Apache Software FopundationASIC Application Specific ICASL Assessment Services Limited (Testlabor in UK)ASM Asynchronous Segment MulitplexerASMW Amt für Standardisierung, Messwesen und Warenprüfung (DDR)ASN.1 Abstract Syntax Notation 1ASP - Application Oriented Software Test Plug

- Abstract Service Primitive- Association of Shareware Prefessionals- Application Service Providing- Active Server Pages- Access Service Provider

ASTM American Society for Testing and MaterialsATTH ATM to the HomeASU Asynchron-Synchron-UmsetzerASUT Association Suisse des Usagers de Télécommunication, BernAT&T American Telephone and Telegraph CompanyATA Analogue Terminals and Access (ETSI)ATC Asynchronous Transfer Control (entity)ATD Asynchronous Time DivisionATDL Alternativer Telekommunikations-DienstleisterATG - Auslands-Tochtergesellschaft (DTAG)

- Alcatel Thomson GigadiscATM - Asynchronous Transfer Mode

- Automatic Teller Machine (Geldautomat)- Advanced Testing Methods (ETSI Committee)

ATMR Asynchronous Transfer Mode RingATOS Anlagenindividuelle Unterlagen-Tools (DTAG)ATRT Ausschuss für technische Regulierung in der TelekommunikationATSU Asynchronous Transfer Service User

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ATU ADSL Transmission UnitATU-C ADSL Transmission Unit - Central OfficeATU-R ADSL Transmission Unit – RemoteATVS Aktives TaktverteilsystemAU Access UnitAUI Attachment Unit InterfaceAUI - Access Unit Interface

- Attachment Unit InterfaceAUTEL Asociacion Española de Usario de TelecommunicacionesAUTEX Automatische Telex- und TeletexauskunftAVC Audiovisual ComputerAVS Anrufempfänger für automatischen DatenverkehrAVSt AuslandsvermittlungsstelleAWD Automatische Wähleinrichtung für DatenverbindungenAWG American Wire Gauge (US-Drahtmaße)AWI-T AnwenderAWS AnrufweiterschaltungAWV Ausschuss für wirtschaftliche Verwaltung in Wirtschaft und öffentlicher Hand

BB2B Business-to-BusinessB3ZS Bipolar 3 Zero SubstitutionB6ZS Bipolar 6 Zero SubstitutionB8ZS Bipolar 8 Zero SubstitutionBABT British Approvals Board for TelecommunicationsBAC - Balanced Operation Asynchronous Balanced Mode Class

- Balanced Class of ProceduresBACP Bandwidth Allocation Control ProtocolBAF Bellcore Automatic Message FormatBakom Bundesamt für Kommunikation (Schweiz)BAM Bundesanstalt für MaterialprüfungBAP - Banking Application Process

- Bandwidth Allocation ProtocolBAPT Bundesamt für Post und Telekommunikation ⇒ RegTPBAS - Basic Activity Subset (OSI, Schicht 5)

- Bild-Austast-SynchronsignalBASE Banking Application Service ElementsBASIC Beginner's All-purpose Symbolic Instruction CodeBAST Bundesanstalt für StraßenwesenBB BasisbandBBAT Battery Backup moduleBBAT2 Battery Backup module 2BBF Broadband FrequencyBBFW Broadband Fixed WirelessBBN Bezirksbüro Netze (DTAG)BBS Bulletin Board SystemBBV BreitbandvermittlungBCC - Block Checking Character

- Blind courtesy copyBCCP Bearer Connection Control PartBCD Binary Coded Decimal

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BCS - Basic Combined Subset- British Computer Society- British Cable Services

BCP Byte Control ProtocolBdB Bundesverband deutscher BankenBDE BetriebsdatenerfassungBDI Bundesverband der Deutschen IndustrieBDLC Borroughs Data Link ControlBDSG BundesdatenschutzgesetzBDT - Bureau for Technical Development

- Broadband Digital Terminal- Bedarfsdeckungsteam (DTAG)

BDU Bundesverband Deutscher UnternehmensberaterBDZV Bundesverband Deutscher ZeitungsverlegerBECN Backward Explicit Congestion NotificationBEDAG Bernische Datenverarbeitung AGBEL Bell (ASCII-Zeichen Nr. 07h)BellCoRe Bell Communications ResearchBELTUG Belgian Telecommunications Users GroupBER - Bit Error Rate

- Basic Encoding RulesBERKOM Berliner Multifunktionales Breitband-Kommunikationssystem (auch: Berlin

Communications System)BERT Bit Error Rate TestBESSY Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung mbHbfai Bundesstelle für AußenhandelsinformationenBFS Betriebsführungssystem (DTAG)BFU Betriebsführungsumsetzer (DTAG)BG Bietergemeinschaft (DTAG)BGA - Bundesverband des Deutschen Groß- und Außenhandels

- Ball Grid ArrayBGP Border-Gateway ProtocolBGT BaugruppentauschBGt BaugruppenträgerBIC Broadband Interface ControllerBICFET Bipolar Inversion Channel Field Effect TransistorBICSI Building Industry Consulting Service InternationalBIF Bus Identification FieldBIFOA Betriebswirtschaftliches Institut für Organisation und AutomationBIGFON Breitbandiges Integriertes Glasfaser-Fernmelde-OrtsnetzBIM Business Information ManagementBIN Betriebsinformationsnetz (DTAG)BIOS Basic Input Output SystemBIP Bus Indication ParameterBIP-8 Bit Interleaved Parity (8-bit)BIS - Büro-Informationssysteme

- Betriebsinformationssystem für den Datenübermittlungsbetrieb- Basis-Infrastruktur

B-ISDN Broadband Integrated Services Digital Network; Breitband-ISDNBISON Betriebsinformationssystem im On-Line-VerfahrenBISS Bestands- und Beschaltungsinformationssystem für SPC-Vermittlungsstellen (DTAG)BIST Built-in Self TestBit Binary Digit (als Maßeinheit: bit)BIT Beratungszentrum Informationstechnik

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BITKOM Bundesverband Informationswirtschaft, Telekommunikation und MedienBITS Building Integrated Time SupplyBK BreitbandkabelBKG Bundesamt für Kartografie und GeodäsieBKVrSt Breitband-VerstärkerstelleBKVtSt Breitband-VerteilstelleBLAST Bell Labs Layered Space TimeBLERT Block Error Ratio TestBLES Broadband Loop Emulation ServiceBMBF Bundesministerium für Bildung und ForschungBMFT Bundesministerium für Forschung und TechnologieBMGT Battery Managing ModuleBMPT Bundesministerium für Post und TelekommunikationBMS Bandwidth Management SystemBNA Burroughs Network ArchitectureBNC Bayonet Nut ConnectorBNF Backus-Naur-FormBNO Backbone-Network OperatorBNQ Bureau de Normalisation du QuebecBOC Bell Operating CompaniesBoD - Bandwidth on Demand (engl.)

- Bedarfsorientierte Durchschaltung (deutsch)- Board of Directors

BOM - Beginning of Message- Bill of Materials

BOMP Beginning of Message ProcessorBONDING Bandwidth ON Demand INteroperability GroupBOP Bit Oriented ProtocolBOS Behörden und Organisationen mit SicherheitsaufgabenBOTMA British Office Technology Manufacturers' AllianceBPRS Bezirksbüro für Personal- und Rechtsservice (DTAG)BPV Bipolar ViolationBRA Basic Rate AccessBRAIN Berlin Research Area Information NetworkBREKO Bundesverband der regionalen und lokalen Telekommunikationsgesellschaften e. V.BRI Basic Rate InterfaceBRM Bestands- und Referenzdaten-Management (DTAG)BS Backspace (ASCII-Zeichen Nr. 08h)BSC - Binary Synchronous Communications

- Base Station Controller (GSM)BSD Berkeley Software DistributionBSI - Bundesamt für Sicherheit in der Informationstechnik

- British Standards Institute- Bell South International

BSL-PDU Bus Specific Layer Protocol Data UnitBSOL British Standards OnlineBSR Backplane Shift RegisterBSRC Backplane Shift Register ChipBSS - Basic Synchronized Subset (OSI, Schicht 5)

- Broadcasting Satellite ServiceBSt Betriebsstelle (der DTAG)BSTF Beirat für Standardisierung in der Telekommunikation und für Funkfragen

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BT - British Telecom- Business Telecommunications (ETSI Committee)- Burst Tolerance (ATM)

BTB-OB Bezirksbüro Technischer Betrieb/Objekt ⇒ BBNBTC Business TelecommunicationsBTG Beteiligungsgesellschaft (DTAG)BTLZ British Telecom Lempel-Ziv

(Datenkompressionsalgorithmus, = ITU-T V.42bis)BTM Bell Telephone Manufacturing, AntwerpenBTRL British Telecom Research LaboratoriesBTS Base Transceiver Station (GSM)BTSC Broadcast Television System Committee of the Electronic Industries AssociationBTV Betreiberbezogene TeilnehmerverwaltungBTX BildschirmtextBU BackupB UMZ Bedingungen der Deutschen Telekom für das Umweltmanagement für Zulieferungen

(DTAG)BÜPLAF Bündelplanung für das Fernsprechnetz (DTAG)BV BildverarbeitungBVB Bundesverband Informations- und KommunikationssystemeBVIT Bundesverband InformationstechnologienBVN Breitband-VerteilnetzBVR Bundesverband der Deutschen Volksbanken und RaiffeisenbankenBVST BereichsvermittlungsstelleBW - Business Information Warehouse (DTAG)

- Broadband WholesalerBWB Bundesamt für Wehrtechnik und BeschaffungBYPASS Bypass UnitBZT Bundesamt für Zulassungen in der Telekommunikation !

CC ContainerC/R Command/ResponseCA - Conditional Access

- Certificate Authority- Computer Associates

CAC - Comité d'Action Commerciale- Canadian Advisory Committee

CAD - Computer Aided Design- Card Accepting Device

CADCP Customer Application Dependent Communication ProtocolCADD Computer Aided Design DraftingCAE Computer Aided EngineeringCAI Common Air InterfaceCASE Common Application Service ElementCAH Computer Aided HandlingCAHCOM Computer-aided Human CommunicationCAI - Computer Aided Industry

- Computer Assisted InstructionCAL Computer Assisted LearningCAM - Computer Aided Manufacturing

- Customer Administration Manager (DTAG)CAN - Cancel (ASCII-Zeichen Nr. 18h)

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- Controller Area Network- Customer Access Network

CAO - Computer Aided Office- Computer Aided Organisation

CAP - Computer Aided Planning- Common Application Protocol- Carrierless Amplitude and Phase Modulation (xDSL)- Chef-Arbeitsplatz- Customer Application Protocol- Competative Access Provider

CAPI Common Application Program InterfaceCAPTAIN Character and Pattern Telephone Access Information Network SystemCAR - Computer Aided Retrieval

- Committed Acess RateCAS - Channel Associated Signalling (ITU-T G.704)

- Call-Path Associated Signalling- Column Access Strobe (DRAM)- Customer Associated Signalling

CASA Cisco Application Services ArchitectureCASE - Common Application Service Elements

- Computer Aided Software Engineering- Common Application Service Element

CASF Customer Access Summary FileCAT - Capabilities of Advances Terminals

- Computer Aided TranslationCATV - Cable Television

- Community Antenna Television- TV Cable Distribution

CBDS Connectionless Broadband Data ServiceCBEMA Computer and Business Equipment Manufacturer

AssociationCBM Carrierband-Modem-InterfaceCBMS Computer Based Message SystemCBQ Class-Based QueuingCBR Constant Bit RateCBT Computer Based TrainingCBX Computer Aided Branch ExchangeCC - Connection Confirmation (OSI, Schicht 4)

- Courtesy Copy- Country Code- Competence Center (DTAG)- Clear Channel

CCA Computer Corporation of AmericaCCBS Completion of Call to Busy Subscriber (Rückruf bei Besetzt)CCC - CEN Certification Committee

- Customs Cooperation Council- Charge Card Calling- Clear Channel Capability- Chaos Computer Club

CCD - Charge Coupled Device- Circuit Design (DTAG)

CCE - Commission of the European Communities- Cluster Common Equipment

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CCEI Centre de Commutation et d'Essais InternationalCCFG - Configuration Control and Frame Generator

- Configuration Control and Frame GenerationCCH Comité de coordination de l'harmonisation

(Coordination Committee for Harmonization) (CEPT)CCI - Comité Consultatif International

- Configuration Control IndicatorCCIA Computer Communication Industries AssociationCCIR Comité Consultatif International des Radiocommunications;

(International Radio Consultative Committee)(Internationaler beratender Rundfunkausschuss)

CCITT Comité Consultatif International Télégraphique et Téléphonique (existierte bis28.02.1993, jetzt ⇒ ITU-T)(Internationaler Beratender Ausschuss für den Telegrafen- und Fernsprechdienst)

CCK Complementory Code KeyingCCL Common Command LanguageCCM - Cross-Connect Multiplexer

- Continuous Current ModeCCMP Configuration Change Management ProcessCCNR Complition of Calls on No ReplyCCO Customer Care Office (DTAG)CCP - Console Command Processing (CP/M)

- Call Control PartCCP/M Concurrent CP/MCCR Commitment Concurrency and Recovery (OSI, Schicht 7)CCS - Common Channel Signalling (CCITT Nr. 7)

- A Calculus of Communicating SystemsCCS-7 Common Channel Signalling 7CCSN Common Channel Signalling NetworkCCT Computerized Communication TerminalCCTA Central Computer and Telecommunications AgencyccTLD Country Code based Top Level DomainCD - Communication des données (CEPT) (Data Communication)

- Committee Draft (ISO, vorher: DP)- Coded Diphase (Code)- Carrier Detect- Call Deflection- Count-Down

CDMA - Code Division Multiple Access- Conventional Multiple Access Technologies

CDMTG Common Data Model Task GroupCDOS Concurrent DOSCDR Call Detail RecordCDS Caller Display ServiceCDSL Customer Premises Digital Subscriber LineCDT CreditCDTV Cell Delay Variation Tolerance (ATM)CDV Cell Delay Variation (ATM)CE - Compact Edition (Microsoft WindowsCE)

- Customer EdgeCE1 Channelized E1CeBIT Centrum für Büro, Information und TelekommunikationCEC Commission of the European Communities

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CECC CENELEC electronic components committeeCECUA European Computer Users' AssociationCEF Cable Entrance FacilityCEFIC Conseil Européen des Fédérations de l'Industrie CliniqueCELP Code-Excited Linear PredictionCEM Contract Equipment ManufacturerCEMF Cisco Element Manager FrameworkCEN Comité Européen de Normalisation

Europäisches Komitee für NormungCENELEC Comité Européen de Normalisation Electrotechnique

(Europäisches Komitee für elektrotechnische Normung)CENTR Council of European National Top-Level Domain RegistriesCENTREX Central Office ExchangeCEO Chief Executive OfficerCEOE Confederation Española de Organisaciones EmpresarialesCEP - Compression/Expansion Processor (Graphik)

- Cable Entry PanelCEPT Conférence Européenne des Administrations des Postes et des Télécommunications

European Conference of Postal and Telecommunications AdministrationsEuropäische Konferenz der Post- und Fernmeldeverwaltungen

CER Canonical Encoding RulesCERN Centre Européen pour la Recherche Nucléaire

(European Organization for Nuclear Research)CERT Computer Emergency Response TeamCES Circuit Emulation Service (ATM)CETME Centro de Estudios Tecnicos de Materiales EspecialesCFA Current Feedback AmplifierCFB Call Forwarding BusyCFE Command File EditorCFNR Call Forwarding No ReplyCFG Command File GeneratorCFP Command File ProcessorCFPNM Command File Processor NMCCFPOAM Command File Processor Operations, Administration and MaintenanceCFS Common Functional SpecificationsCFU Call Forwarding UnconditionalCFU-S Call Forwarding Unconditional to a Service CentreCFV Carrier-FestverbindungCG Computer GraphicsCGA Carrier Group AlarmCGCT Compagnie Générale de Constructions TéléfoniquesCGE Compagnie Générale d'ElectricitéCGEM Computer Graphics Extension MetafileCGI Computer Graphics InterfaceCGM Computer Graphics MetafileCGSB Canadian General Standards BoardCGW Customer GatewayCHAP Challenge Handshake Authentication ProtocolCHILL CCITT High Level LanguageCHIPSY CHILL Integrated Programming SystemCI - Controlled Introduction

- Corporate Identity- Customer Installation

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CIC CiscoInfoCenter

CICG Centre International de Conférence Genève

CIDR Classless Inter-Domain RoutingCIF Common Intermediate Format (288 x 352 Pixel bei 30 Bildern/s)CIGS Kupfer, Indium, Gallium und Selen (Photozellen-Technologie)CIM - Computer Integrated Manufacturing

- Customer Integrated Manufacturing- Computer Input from Microfilm- Common Information Management

CIO Chief Information OfficerCIPOM Steering Committee on Computers, Information Processing and Office MachinesCIPS Canadian Information Processing SocietyCIR - Compagnie Industrielle Radioélectrique, Bern

- Committed Information Rate (Frame Relay)CIRAD International Cooperation Center in Agronomical Research for DevelopmentCISC Complex Instruction Set ComputerCISPR Comité International Spécial des Pertubations Radioélectriques = Internationaler

Sonderausschuss für Funkentstörung (der IEC)C-ISUP Cisco ISDN User partCIT - Committee for International Rail Travel

- Computer-integrierte TelefonieCIX Classless Internet ExchangeCL ConnectionlessCLASS Custom Local Area Signalling ServicesCLC (siehe: CENELEC)CLEC Competitive Local Exchange CarrierCLI - Calling Line Identification

- Command-Line InterfaceCLID Calling Line IdentificationCLIP Calling Line Identification and PresentationCLIR Calling Line Identification RestrictionCLM Cluster Level ManagerCLNP Connectionless-Mode Network ProtocolCL-NS Connectionless-Mode Network ServiceCLP Cell Loss Priority (ATM)CLS Connectionless ServerCLTCM Cluster Level Topology Change MonotoringCM - Conversation Manager

- Cache Manager- Competence Modul (DTAG)

CMAE Configuration Management Application EntityCMB CRC-6 Message Block (ITU-T G.704)CMD Cross-modulation DistortionCME Circuit Multiplexing EquipmentCMG-CE Computer measurement group Central EuropeCMI - Coded Mark Inversion

- Communication Management Interface (Tandem)CMIP Common Management Information ProtocolCMIS Common Management Information ServiceCMISE Common Management Information Service ElementCMOS Complementary Metal Oxide Semiconductor

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CMOT CMIP over TCP/IPCM MduA Competence Modul Material-Disposition und AuftragsbearbeitungCMP Cluster Management ProcessorCMTT Commission Mixte pour les Transmission TélévisuellesCNA Communication Network Architecture (SEL)CNC Computer Numerical ControlCNET Centre National d'Etudes des TélécommunicationsCnf, Conf confirm (primitive)CNB City-Network-BetreiberCNI Customer Network InterfaceCNIE Customer Network Interface EntityCNIL Commission de l'Informatique et de la LibertéCNIP Calling Name Identification and PresentationCNIR Calling Name Identification RestrictionCNIU Customer Network Interface UnitCNMA Communications Network for Manufacturing Applications

(MAP-Bemühung seitens der EG in ESPRIT)CNPF Centre National de Patronat FrançaisCNR Cisco Network RegistrarCNRS Centre National de la Recherche Scientifique

(National Centre for Scientific Research)CNS/AD Cisco Network Services for Active DirectoryCO - Connection-Oriented

- Controlled Object (ISO 9040)- Central Office

COB Conference Office BrusselsCOBOL Common Business Oriented LanguageCOBRA Coherent Optical System(s) for Business Routing and AccessCODASYL Conference on Data Systems LanguagesCODEC Coder/DecoderCOE Council of EuropeCOGS Cost of Goods SoldCOI Community of InterestCOIN Community of InterestCOLD Computer Output on Laser DiskCOLP Connected Line Identification PresentationCOLR Connected Line Identification RestrictionCOM - Continuation Segment of multi-segment Message

- Computer-Output MicrofilmComCom Kommunikationskommission (Schweiz)COMDAC Central Communications Controller Digital Access ControlConf ⇒ CnfCONF Conference CallingCO-NS Connection-Oriented Network ServiceCONV Convergence HeaderCOO Chief Operating OfficerCORBA Common Object Request Broker ArchitectureCOS - Common Use of OSI Standards

- Corporation for Open Systems- Channel-Oriented Segment

COSINE Cooperation for an Open Systems Interconnection Networking in EuropeCOST Coopération Européenne dans le domaine de la recherche scientifique et technique

(European Co-operation in the Field of Scientific and Technical Research)

- 16 -

COT Central-Office TerminationCO-TP Connection Oriented Transaction ProcessingCP Circuit PackCPC Cisco Provisioning CenterCPE Customer Premises EquipmentCPL Committee on Programming LanguagesCPM - Continuous Phase Modulation

- Coordination and Project Team ManagementCP/M Control Program for MicrocomputersCPN Customer Premises EquipmentCPR Common Practice RecommendationsCPS Call Progress SignalCPSS Control Packet Switching SystemCPU Central Processing UnitCQ Custom QueuingCR - Connection Request

- Carriage Return (ASCII-Zeichen Nr. 0Dh)C/R Command/RespondCRC Cyclic Redundancy CheckCRED Credit Card CallingCRM - Common Resources Manager

- Customer Relationship ManagementCRT Cathode Ray TubeCRTC Cathode Ray Tube ControllerCRTP Compressed Real-Time ProtocolCS ChecksumCSA - Canadian Standards Association

- Carrier Service Area (Anschlussbereich)CSAU Circuit Switched Access UnitCSC Communication System Control CentreCSCW Computer Supported Cooperative WorkCSDN Circuit Switched Data NetworkCSELT Centro Studi e Laboratori TelecommunicazioniCSG Customer Service GroupCSI Customer Service InterfaceCSIDCP Customer Service Interface Dependent Convergence ProtocolCSM - Communication Services Manager

- Cisco Service ManagementCSMA/CA Carrier Sense Multiple Access with Collision AvoidanceCSMA/CD Carrier Sense Multiple Access with Collision Detection

(LAN, IEEE 802.3 = ISO/IEC 8802-3)CSNET Computer Science NetworkCSoC Configurable System on ChipCSP - Communicating Sequential Processes

- Communication and Service PointCSPDN Circuit Switched Public Data NetworkCSR Character Shape RecorderCSRC Cisco Subscriber Registration CenterCSRDLC Checkpoint Selective Retransmission Data Link ControlCSS - Committee Support System (EG)

- Cascading Style Sheet(s)- Communications Subsystem (Tandem)

- 17 -

- Cross-Connect SystemCSTA Computer-Supported Telecommunications Applications (ECMA)CSTA/P Protocol for Computer-Supported Telecommunications Applications (ECMA)CSTA/S Services for Computer-Supported Telecommunications Applications (ECMA)CSTG Conceptual Scheme Task GroupCSU - Customer Service Unit

- Control and Service Unit- Channel Service Unit

CSV Comma Separated ValuesCT - Cordless Telephone (CT1, CT2)

- Connection TypeCT1 Channelized T1CTI - Computer Telephony Integration

- Computer Telephony Interface- Coaxial Tranceive Interface

CTL Control CardCTO Chief Technical OfficerCTP Connection Termination PointCTR Common Technical RegulationCTS - Clear To Send (V.24, Ltg. 106/M2)

- Conformance Test Service- Cordless Telephone System

CTSC Computers and Telecommunications CouncilCUA Common User AgentCUBA Computerunterstütze Beschaltungsplanung AVSt (DTAG)CuDA Kupfer-DoppeladerCUG Closed User GroupCULI Computerunterstütztes Leitungs-InformationssystemCUS Conférence Universitaire SuisseCUU Computerunterstützter UnterrichtCW - Call Waiting

- Continuous Wave- Computerwoche (Zeitschrift)

CWP Costed Work ProgrammeCY Calendar Year

DDAA Data-Access ArrangementDAB - Datenabschlussbaugruppe

- Digital Audio BroadcastDAC - Digital-to-Analogue Converter

- Design Automation ConferenceDACNOS Distributed Academic Computint Network Operating SystemDACS Digital Access and Crossconnect SystemDAD Draft AddendumDAE Direktrufnetzabschluss-Einsatz ! (⇒ DNE)DAF Distributed Application FrameworkDAFTG Database Architecture Framework Task GroupDAG DatenabschlussgerätDAGM Deutsche Arbeitsgemeinschaft für MustererkennungDAK - Data Authentication Key

- Deutscher Akkreditierungsrat

- 18 -

DAL Drahtlose AnschlussleitungDAM Draft AmendmentD-AMPS Digital Advanced Mobile Phone Service (USA)DANTE - Deutschsprachige Anwendervereinigung Tex

- - - - Delivery of Advanced Network Technologies in EuropeDaNzKo Datennetzkoordinator (DBP/DTAG) !DAP - Distributed Application Processing

- Directory Access Protocol (X.500)DAR - Distributed Applications Research

- Deutscher AkkreditierungsratDARC Deutscher Amateur-Radio-ClubDARPA Defense Advanced Research Projects Agency (DOD)DAS Directory Service AgentDASE Distributed Applications Support EnvironmentDAT Digital Audio TapeDATE Design Automation and Test in EuropeDATEX(-P,-L) Data Exchange Service (Paket-, Leitungsvermittlung)DAVIC Digital Audio-Visual CouncilDAVID Daten-Verteil- und InformationsdienstDAVOS Digitales Audio-Video-Optisches SystemDARUTS Datenschutz bei rechnerunterstützten TelekommunikationssystemenDATV Digitally Assisted TelevisionDAVIC Digital Audio Video Council (! Sept. 1999)DB Data BaseDBAWG Database Administration Working GroupDBI Deutsches BibliotheksinstitutD-bit delivery bitDBM Data Base ManagerDBMS Data Base Management SystemDBP Deutsche Bundespost ! (⇒ DTAG)DBPL Data Base Programming LanguagedBrn Decibels above Reference NoisedBrnC Noise Power, in dBrn, measured by a set with C-message WeightingDBS Direct Broadcasting SatellitesDBSSG Database Systems Study GroupDBT Datenübertragungsgerät (Modem) für BtxDCn Device Control n (ASCII-Zeichen Nr. 11h...14h)DCA - Document Contents Architecture (IBM)

- Distributed Communications Architecture (Sperry)DCC Data Country CodeDCD Data Carrier Detect (V.24 Ltg. 109)DCE - Data Circuit-Terminating Equipment = DÜE

- Distributed Computing EnvironmentDCL Data Communications LanguageDCM Discontinuous Current ModeDCME Digital Circuit Multiplexing EquipmentDCN Data Communication NetworkDCOM Distributed Component Object ModelDCP Device Conversations ProtocolDCS - Digital Command Signal

- Digital Cellular System- Distributed Control Systems- Digital Cross-Connect System

DCSS Distributed Computer Control Systems

- 19 -

DCT Discrete Cosine TransformDC TPDU Disconnect Confirm Transport Protocol Data UnitDD Double DensityDDB Distributed DatabaseDDBS Distributed Database SystemsDDC Direct Digital ControlDDCMP Digital Data Communications Message Protocol (DEC)DDE Dynamic Data Exchange (MS Windows)DDGI Deutscher Dachverband für Geo-InformationenDDGW Digital Display Working GroupDDI Direct Dialling-InDDIF Digital Document Interchange FormatDDL Data Description LanguageDDLC Data Description Language CommitteeDDM Data Display MonitorDDN - Digital Data Network

- Department of Defense Communications (USA)DDP Distributed Data ProcessingDDR Double Date Rate (Speicher-Technologie)DDS Digital Data ServiceDDSWP Dictionary Systems Working PartyDDU Digital Distribution UnitDDV Datendirektverbindung (DTAG)DDV-M Datendirektverbindung mit gemanagter Datennetzabschlusseinrichtung (DTAG)DE - Datenentstörung

- Discard EligibilityDEC Digital Equipment CorporationDE-CIX Deutsche Commercial Internet ExchangeDECT Digital Enhanced Cordless TelecommunicationsDEE DatenendeinrichtungDEKITZ Deutsche Koordinierungsstelle für Normenkonformitätsprüfung und ZertifizierungDEL Delete (ASCII-Zeichen Nr. 7Fh)DELKOS Dezentrale Leistungs- und KostenrechnungDENIC Deutsches Network Information CenterDER Distinguished Encoding RulesDES Data Encryption StandardDESY Deutsches Elektronen-SynchrotonDETECON Deutsche Telepost Consulting GmbHDeTeKS Deutsche Telekom Kabel-Service GmbHDEWB Deutsche Effecten- und Wechsel-Beteiligungsgesellschaft AGDFB Daten-Fernschalt-BaugruppeDFG - Deutsche Forschungsgemeinschaft

- Deutsche Fernmeldegesellschaft- Datenfernschaltgerät !- Default Frame Generator

DFGt Datenfernschaltgerät !DFN Deutsches ForschungsnetzDFP Dynamic Feedback ProtocolDFR Document Filing and RetrievalDFS Deutsches FernmeldesatellitensystemDFÜ DatenfernübertragungDFV DatenfernübertragungDGD Deutsche Gesellschaft für Dokumentation e.V., FrankfurtDGIR Deutsche Gesellschaft für Informationstechnik und Recht

- 20 -

DGON Deutsche Gesellschaft für Ortung und Navigation e. V.DGPS Differential Global Positioning SystemDGPT Deutsche Gesellschaft für Post- und TelekommunikationsgeschichteDGQ Deutsche Gesellschaft für Qualität e. V.DGZ Deutsche GirozentraleDHCP Dynamic Host Configuration ProtocolDI Distribution InterfaceDIA Document Interchange Architecture (IBM)DIAG TPDU Diagnostic Transport Protocol Data UnitDIANE Direct Information Access Network for EuropeDIA NI Design für IV-Architektur der Netzinfrastruktur (DTAG)DIAS Datenbank-InformationsablagesystemDICE Danube Integrated Circuits Engineering (Infineon-Entwicklungszentrum)DID Direct Inward Dialling (Durchwahl in einer Nebenstellenanlage)DIDON Diffusion de Données (DÜ)DIF Document Interchange Format (MHS)DiffServ Differentiated ServiceDIHT Deutscher Industrie- und HandelstagDIMA Dispositionsmodell Ausland (DTAG)DIME Distributed Multimedia EnvironmentDIMDI Deutsches Institut für medizinische Dokumentation und InformationdIML digitale Internationale Mietleitung (DTAG) ⇒ IBLDIN Deutsches Institut für NormungDIP - Distributed Interactive Processing

- Dual In-line PackageDIPE DIP EnvironmentDirRufV Verordnung über das öffentliche Direktrufnetz für die Übertragung digitaler

NachrichtenDIS - Draft International Standard (ISO)

- Delta Information Systems, Horsham, USADISC Disconnect (HDLC command)DISOSS Distributed Office Support System (IBM)DITE Italian Law and Technology AssociationDITR Deutsches Informationszentrum für Technische Regeln (im DIN)DIV Digitale VermittlungsstelleDIVF Digitale Vermittlungsstelle für das FernnetzDIVO Digitale Vermittlungsstelle für das OrtsnetzDK Datenkommunikation (Konzerngeschäftsfeld der DTAG)DKE Deutsche Elektrotechnische Kommission im DIN und VDEDKF Dokumentation Kraftfahrwesen e.V.DKFZ Deutsches KrebsforschungszentrumDKVt Digitalsignal-KanalverteilerDl(NTaN) Dienstleitung NormaltaktnetzDL Data Link (Layer)DLC - Dynamic Load Control

- Digital Loop CarrierDLCI Data Link Connection IdentifierDLE Data Link Escape (ASCII-Zeichen Nr. 10h)DLL - Data Link Layer

- Dynamic Link Library (MS WINDOWS)DLR Deutsche Forschungsanstalt für Luft- und RaumfahrtDLS Data Link ServiceDLSDU Data Link Service Data UnitDLV Dienstleistungsvereinbarung (DTAG)

- 21 -

DLM Device Level ManagerDMA Direct Memory AccessDMAC Destination MACDM - Disconnected Mode

- Degraded Minutes (Minuten mit verminderter Qualität)- Domain Manager

DMA - Direct Memory Access- Document Management Alliance

D_MAC Destination MAC AddressD_MAN_SAP Destination MAN Service Access PointDME Distributed Management EnvironmentDMI Distributed Management InterfaceDML Data Manipulation LanguageDMPDU Derived MAC Protocol Data UnitDMS Digital Multipoint SystemDMSC Data Mapping Control SystemDMSU Digital Main Switching UnitDMT Discrete Multitone Modulation TechniqueDMTF Desktop Management Task ForceDNA - Destination Node Address

- Digital Network Architecture- Distributed interNet Architecture

DNAE Datennetzabschluss-EinrichtungDNB Datennetzabschluss-BaugruppeDNE Datennetzabschluss-EinsatzDNG Datennetzabschluss-GerätDNIC - Data Network Identification Code

- Data Network Interface CircuitDNIS Dialled Number Identification ServiceDNKZ DatennetzkontrollzentrumDNM Datennetzabschluss-Modul !DNS - Datennetzsignalisierung

- Domain Name Server (Internet)- Domain Name Service (Internet)

doa Date of latest announcement (ETSI)DOAM Distributed Office Application ModelDOC Department of Communications (Kanada) ⇒ Industry Canada (IC)DOCSIS Data Over Cable Service Interface SpecificationDOD Department of Defense, USADoD IP Department of Defence Internet ProtocolDOM Document Object ModelDOMA Dokumentation Maschinenbau e.V.dop/e Date of latest publication of new national standard or endorsement of ETS (ETSI)DOR Digital Optical RecorderDoS Denial of ServiceDOS Disk Operating SystemDOSBS Data over Speech Bearer ServiceDOTAN Digitales Optisches Teilnehmer-Anschluss-NetzDOV Data Over VoiceDOVBS Data over Voice Bearer Servicedow Date of withdrawal of conflicting National Standard (ETSI)DP - Draft Proposal

- Distribution Point

- 22 -

DPAP Distributed Page Allocation ParameterDPCM Differential PCMDPG Deutsche physikalische Gesellschaftdpi dots per inchDPMI DOS Protected Mode InterfaceDPNSS Digital Private Network Signalling SchemeDPOF Digital Print Order FormatDPS (Honeywell)DPSK Differential Phase Shift Keying = DifferenzphasenmodulationDPT Dynamic Packet TransportDPV DatenpaketvermittlungDQDB Distributed Queue Dual BusDQS Deutsche Gesellschaft zur Zertifizierung von QualitätssicherungssystemenDQSM Distributed Queue State MachineDR Designated RouterDRCS Dynamically Redefinable Character SetDRS - Document Retrieval System

- Data Relay System- Digitales Richtfunksystem

DR TPDU Disconnect Request Transport Protocol Data UnitDS - Directory Services

- Double Sided- Document Storage- Distributed Services- Data Spooling (Card)

DS0 Digital Signal, level 0DSA - Distributed Systems Architecture

- Directory System Agent (Verzeichnis-Haupt-Systemteil)DSB Digital Serial BusDSDL Data storage description languageDSDv Datensignal-DigitalverbindungDSE Data Switching ExchangeDSGV Deutscher Sparkassen- und GiroverbandDSK - Daten-Signal-Karte

- Digitalsignal-KanaleinheitDSL Digital Subscriber LineDSLAM Digital Subscriber Line Access Multiplexer (ADSL)DSMCC Digital Storage Media Connection and ControlDSMP Distributed Session Management ProtocolDSMX Digitalsignal-MultiplexerDSN Defense Switched NetworkD_SN Destination Subnetwork NumberDS0-DS4 Digital Signal RatesDSM Distributed System Management (Tandem)DSO Digitales SpeicheroszilloskopDSP - Digital Signal Processor

- Domain Specific PartDSR Data Set Ready (V.24 Ltg. 107/M1)DSRR Digital Short Range Radio (ETSI PT 25)DSS-1 Digital Signalling System No. 1DSSS Direct Sequence Spread SpectrumDSSSL Document Style Semantics and Specification LanguageDSTG Database Systems Task GroupDST-REF destination reference

- 23 -

DSU - Digital Service Unit- Data Service Unit

DSUm DigitalsignalumschalterDSV DigitalsignalverbindungDSVD Digital simultaneous voice and dataDSX Bell System digital cross-connectDT Direktion TelekomDTA Digital Terminals and Access (ETSI)DTAG Deutsche Telekom AGDTAM Document Transfer and ManipulationDT-AS Dual Tone-Alerting SignalDTC - Data Test Center

- Desk Top ConferenceDTD Document Type DefinitionDTE Data Terminal Equipment = DEEDTeV Deutsche TelecomDTI Department of Trade and IndustryDTL Diode-Transistor-LogicDTMF Dial Tone Multi Frequency = MFVdtms Deutsche Telefon und Marketing Services GmbHDTNA Deutsche Telekom North AmericaDTNMS Datentechnik NetzmanagementsystemDTP Desktop PublishingDT PDU Data Protocol Data UnitDTR - Draft Technical Report (ISO)

- Data Terminal Ready (V.24 Ltg. 108/2 / S1.2)DTU Data Termination UnitDUA Directory User Agent (Verzeichnis-End-Systemteil)DUAL Diffusing Update AlgorithmDuD Datenschutz und DatensicherungDUE DatenumsetzereinrichtungDÜE DatenübertragungseinrichtungDUID Data Unit IdentifierDUST DatenumsetzerstelleDUST-D DUST am Sitz der DVSTDUST-U DUST der unteren NetzebeneDV - Datenverarbeitung

- Distance VectorDVA DatenverarbeitungsanlageDVB Digital Video BroadcastingDVBG Digital video broadcasting groupDVD Digital Versatile DiskDVE DatenvermittlungseinrichtungDVI Digital Video InterfaceDVS DatenvermittlungssystemDVST DatenvermittlungsstelleDWDM Dense Wavelength Division Multiplexdx Duplex, (Vollduplex, auch als FDX für 'full duplex' abgekürzt)DXB Datexnetzabschluss-BaugruppeDXC Digital Cross-ConnectorDXE DatexnetzabschlusseinsatzDXG Datexnetzabschluss-GerätDXI Data Exchange Interface ProtocolDXM Datexnetzabschlussmodul

- 24 -

DZF Dokumentationszentrale Feinwerktechnik e.V.

EE1 Europäisches 2,048-Mbit/s-PCM-GrundsystemE1IU SMDS/CBDS-E1-Interface UnitE3 Europäisches 34-Mbit/s-PCM-GrundsystemE&M Ear and MouthEA - Address Field Extension Bit

- Extended AddressEAI Enterprise Application IntegrationEAN International Article Numbering AssociationEACEM European Association of Consumer Electronic ManufacturersEA TPDU Expedited Acknowledge Transport Protocol Data UnitEARN European Academic and Research NetworkEAROM Electrically Alterable ROMEASINET European Academic Supercomputer Initiative NetworkEAU Edge Gateway Access UnitEBCDIC Extended Binary Coded Decimal Interchange CodeEBD Elektronischer BriefdienstEB/ITG Executive Board Information Technology Ad Hoc Expert GroupEBGP External Border Gateway ProtocolEBITDA Earnings Before Interest, Taxes, Depreciation and AmortizationEBU European Broadcasting UnionebXML electronic business Extensible Markup LanguageEC European CommunityECAN Echo CancellationECD - Electrochromic Display

- Event Control and Display processEC-DC Electronic Commerce for Developing CountriesECE United Nations Economic Commission for EuropeECFA European Committee for Future AcceleratorsECHO European Commission Host OrganisationECIS European Committee for interoperable SystemsECITC European Committee for IT CertificationECL - Emitter coupled Logic

- European Compliance LaborotoryECM - Error Correction Mode

- Extension Control ModuleECMA European Computer Manufactures AssociationEco Electronic Commerce ForumECOC European Conference on Optical CommunicationsECOS ETSI Card Operating SystemECREEA European Conference of Radio and Electronic Equipment AssociationsECS - European Common Standard

- European Communication SatelliteECT Explicit Call TransferECTA European Competitive Telecommunications AssociationECTEL European Telecommunications and Professional Electronics IndustryECTUA European Council of Telecommunications User AssociationsECU European Currency UnitEDGE Enhanced Data Rates for GSM EvolutionEDH Electronic Document Handling

- 25 -

EDI Electronic Data InterchangeEDIF Electronic Design InterchangeEDIFACT Electronic Data Interchange for Administration, Commerce and TransportEDIM EDI Message (MHS)EDIMS EDI Message System (MHS)EDLC Electro-chemical Double-Layer CapacitorEDM Engineering-Data Management SystemEDP - Electronic Data Processing

- Event Distribution ProcessEDS Elektronisches DatenvermittlungssystemED TPDU Expedited Data Transport Protocol Data UnitED TPDU-NR Expedited TPDU NumberEDTV Extended Definition TelevisionEE Equipment Engineering (ETSI Committee)EEA Electronic Engineering AssociationEEMA European Electronic Mail AssociationEEPROM Electrically Erasable and Programmable ROMEET - End-to-End Test

- Ende-Ende-TestEFF Extended Facilities FieldEFOC European FOCEFQM European Foundation for Quality ManagementEFSM Extended Finite State MachineEFT Electronic Funds TransferEFTA European Free Trade AssociationEFTPOS Electronic Fund Transfer Point of SaleEG Europäische GemeinschaftEGN EinzelgebührennachweisEGP External (auch: Exterior) Gateway ProtocolEGW Edge GatewayEHA European Harmonisation ActivityEHF Extremely High Frequency (30-300 GHz)EHKP Einheitliche Höhere KommunikationsprotokolleEIA Electronic Industries AllianceEIAJ Electronics Industries Association of JapanEIB Europäische InvestitionsbankEIC Equipment Identification CodeEICTA European Information and Communication Technologies Industry AssociationEIES = IES = ROSEEIGRP Enhanced Interior Gateway Routing ProtocolEIR Equipment Identity RegisterEIRP Effective Isotropically Radiated PowerE.I.S. Entwurf Integrierter SchaltungenEISA Enhanced Industry Standard ArchitectureEITO European Information Technology ObservatoryEJB Enterprise JavaBeansEJOB European Joint Optical Bistability ProjectEKT Envelope-KanalteilerEKV Einkaufsverantwortlicher (DTAG)ELAN - ESPRIT Local Area Network

- Elementary LanguageELF Extremely Low Frequency (30-300 Hz)ELFE - Elektronische Fernmelderechnung (DTAG)

- Elektronische Rechnung im Format EDIFACT (DTAG)

- 26 -

ELFEXT Equal Level Far-End CrosstalkELIU Electrical Line Interface UnitELV Extra-low voltageELVOR Elektronischer Vordruck-Katalog (DTAG)EM - End of Medium (ASCII-Zeichen 19h)

- Electronic Mail- Error Monitoring- Element Manager

EMA Digital Equipment Corporation's Network Management SystemEMC Electro-Magnetic Compatibility = EMVEMF Event Management FilterEMI Electromagnetic InterferenceEMP - Electromagnetic Pulse

- EntwicklungsmusterprüfungEMS - Event Management System (Tandem)

- Element Management SystemEMUG European MAP Users GroupEMV Elektromagnetische VerträglichkeitEN Europäische Norm (CEN/CENELEC)ENC European Network CenterENF Exchange and Network Features (CEPT-Arbeitsgruppe)ENQ Enquiry (ASCII-Zeichen Nr. 05h)ENV Europäische VornormENVOY Advanced Communications Procedures with Extendet FunctionsENX European Network ExchangeEOC - Embedded Operation Channel

- End-of-contentsEOM End Segment of multi-segment MessageEOT - End of Transmission (ASCII-Zeichen Nr. 04h)

- end of transport-service-data-unit markEPA Enhanced Performance Architecture (MAP-EPA)EPD Early Packet DiscardEPG Electronic Programme GuideEPHOS European Procurement Handbook for Open SystemsEPIC Electronic Information Privacy CenterEPIISG European Project on Information Infrastructure Starter Group (ETSI)EPL Elektronische PreislisteEPO European Patent OfficeEPOS Einsatz der Datenverarbeitung am PostschalterEPRA Enhanced Performance Router Access UnitEPROM Erasable and Programmable ROMEPS Echtzeit-PositionierungsserviceEPSB Extension Power Supply BackplaneEPÜ Europäisches PatentübereinkommenEQTV Extended Quality TelevisionER Externer Rechner (Btx)E/R Error Report FlagERL Echo Return LossERO European Radiocommunications OfficeERP Enterprise Resource PlanningErdFuSt ErdfunkstelleERL Echo Return LossERMES European Radio Messaging System

- 27 -

ERNO Europäisches Raumfahrtzentrum Nord, BremenERP - Emitted Radiation Power

- Enterprise Resource PlanningER PDU Error Report Protocol Data UnitES - End System

- Errored Seconds (fehlerbehaftete Sekunden)ESA - European Space Agency

- Eingangs-SchnittstellenanpassungESA-IRS European Space Agency's Information Retrieval ServiceESB Extra-SonderkanalbereichESC - Escape (ASCII-Zeichen Nr. 1Bh)

- Engineering Service Circuit (Erdefunkstellen)ESC/P EPSON Standard Code for PrintersESD Electrostatic DischargeESDI Enhanced Small Device InterfaceESF Extended Superframe FormatESIG European SMDS Interest GroupESE Equipement Spécifique d’ExtrémitéESF European Science FoundationESIG - European SMDS Interest Group

- European Switched Multi-Megabit Interest GroupESMTP Extended Simple Mail Transport ProtocolESP - Embedded Standard Product

- European SMDS Projekt- Eudora Sharing Protocol

ESPRIT European Strategic Programme for Research and Development in ITs(Europäisches Strategieprogramm für informationstechnische Forschung undEntwicklung)

ESRA Extended Slotted Ring ArchitectureEsri Environmental Systems Research Institute (Redlands USA)ESS Electronic Switching SystemESTELLE (ISO Formal Description Language)ESTI Eidgenössisches StarkstrominspektoratESUG European smalltalk user groupET Elektrim Telekomunikacja (Polen)Etacs Extended Total Access Communication SystemETB End of Transmission Block (ASCII-Zeichen Nr. 17h)ETCD Equipement de terminaison de circuit de données (= DCE; DÜE)ETGW Ethernet/802.3 InterfaceEthernet Protokoll von Intel, Xerox, DEC (1980), unter IEEE 802.3 und ISO/IEC 8802-3 als LAN-

Standard definiert (ether = Äther)ETIC European Committee for IT/T Testing and CertificationETIS European Telecommunication Information ServiceETNO European Public Telecommunications Network Operators AssociationETR European Technical Report (ETSI)ETS European Telecommunications Standard (ETSI) Europäische

TelekommunikationsnormETSI European Telecommunication Standards Institute Europäisches Institut für

TelekommunikationsstandardsETTD Equipement terminal de traitement de données (= DTE; DEE)ETX End of Text (ASCII-Zeichen Nr. 03h)EU Europäische Union / European UnionEUCATEL European Conference of Associations of Telecommunications IndustriesEUMEL Extendable multi User Microprocessor ELAN-System

- 28 -

EUNET European UNIX User's NetworkEUREKA European research coordination agencyEURESCOM European institute for research and strategic studies in telecommunicationsEUROBIT European Association of Manufacturers of Business Machines and Information

Technology IndustryEURONET Europäisches NetzEUSIDIC European Association of Information ServicesEUT Equipment under testEUTELSAT European Telecommunications Satellite Organization (Europäische

Fernmeldesatelliten-Organisation)EVRC Enhanced Variable Rate CodecEVSt Endvermittlungsstelle !EVÜ Einzelverbindungsübersicht (DTAG)EWICS European Workshop on Industrial Computer SystemsEWOS European Workshop for Open SystemsEWS - Elektronisches Wählsystem

- ErsatzwegschaltungEXAPT Extended Subset of APTEXB Extension Backplane ModuleEXU Extension UnitEXZ Excessive ZerosEZB Europäische Zentralbank

FF2F Face-to-FaceFA - Fernmeldeamt

- Frame AlignmentFAQ Freqently asked questionsFAS Frame Alignment SignalFAST Forecasting in Science and Technology, EGFAT Fernsteuerbarer Adressierbarer TeilnehmerkonverterFB Fachbereich (DTAG)F bit final bitFBH Ferdinand-Braun-Institut für HöchstfrequenztechnikFBL Fachbereichsleiter (DTAG)FBO - Fachverlag für Büro- und Organisationstechnik GmbH

- Fernmelde-BauordnungFC Finance CommitteeFCA Formatted Content ArchitectureFCAPS Fault, Configuration, Accounting, Performance, SecurityFCC Federal Communications CommissionFCS - Frame Check Sequence (HDLC)

- Full-Circuit Service (DTAG)- Field Customer Shipment

FD Formal DescriptionFDA Formatted Document ArchitectureFDD Frequency-Division DuplexFDDI Fibre Distributed Data InterfaceFDIC Facsimile Data Conversion an Interface Control EquipmentFDL Facility Data LinkFDM Frequency Division MultiplexingFDMA Frequency Division Multiple Access

- 29 -

FDPS Frequency Division Packet SwitchingFDS Frequency Division SwitchingFDT Formal Description TechniqueFDX Full DuplexFE - Fast Ethernet

- Frame Synchronization Bit Error Event (T1-System)FEA (Computer Aided) Finite Element AnalysisFEBE Far-End Block ErrorFEC Forward Error CorrectionFECN Forward Explicit Congestion NotificationFEG Frame Edge Gateway RelayFEM Finite Element ModellingFEP Front End ProcessorFET Field Effect Transistor; FeldeffekttransistorFEXT Far-end Crosstalk (Fernnebensprechen)FF Form Feed (ASCII-Zeichen Nr. 0Ch)FFT Fast Fourier TransformFG Fachgruppe (DTAG)FGD Feature Group DFhG Fraunhofer GesellschaftFH FachhochschuleFHS Filesystem Hierarchy StandardFHSS Frequency Hopping Spread SpectrumFI - Format Identifier

- Facility IdentificationFIATA International Association of Freight ForwardersFIB Forwarding Information BaseFIC - Fabric-Interface Card

- Frame Identification CodeFIF Facsimile Information FieldFIFO First In First OutFIMAS Financial Message Authentication StandardFIPS Fully Integrated Power SupplyFIS - Fachinformationssystem

- Fraunhofer-Institut für Systemtechnik und InnovationsforschungFISO Financial Industry Standards OrganisationFISU Fill-in Signal Unit (ZZK)FITL Fibre in the LoopFIZ FachinformationszentrumFKS Fernmelde-Klein-SteckverbinderFKTO FernmeldekontonummerFM - Frequenzmodulation

- Frame Marker- Fault Management

FMAE Fault Management Application EntityFMÄV Fehlermelde-Änderungsverfahren (DTAG)FMC - Fixed Mobile Convergence

- Fault Management CenterFMEA Fehlermöglichkeits- und Einflussanalyse (DTAG)FN Fibre NodeFNA Fachnormenausschuss (DIN)FNC Federal Network Council (USA)FNE Fachnormenausschuss Elektrotechnik (DIN)

- 30 -

F+O Verband der Deutschen Feinmechanischen und Optischen Industrie e. V.FO FernmeldeordnungFOC Fibre Optic CommunicationFOIA Freedom of Information Act (USA)FOIP Fax over IPFOKUS Forschungsgruppe für Offene KommunikationssystemeFORMEX Formalised Exchange of electronic publications Office for Official Publications of the

European CommunitiesFORTRAN Formula TranslatorFPB Frame Parameter BlockFPCA Formatted Processable Content ArchitectureFPDA Formatted Processable Document ArchitectureFPGA Field Programmable Gate ArrayFPH ISDN Freephone Servicefps Frames per SecondFPS Framing Pattern SequenceFPT Fast Packet TransferFR Frame relayFRF Frame relay forumFRM FehlerratenmessungFRMR Frame RejectFRNE Frame Relay Network ElementFROM Fusable ROMFRS Frame Relay ServiceFRSU Frame Relay Service UnitFS - File Separator (ASCII-Zeichen Nr. 1Ch)

- Functional Standard (ETSI)- Fixed Service

FSA Framework Study Area(s) (ITU-T)FSAN Full Service Access NetworkFSG Free Standards Group (Linux)FSK Frequency Shift Keying = FrequenzumtastungFSM Finite State MachineFSP FremdsprachenplattformFSS Fixed Satellite Service (Fester Funkdienst über Satelliten)FSTG Functional Standardisation Taxonomy GroupFT File TransferFTAM File Transfer, Access and ManagementFTP File Transfer ProtocolFTS Fiche-Terminal-SystemFTTC Fiber to the CurbFTTH Fiber to the HomeFTTN Fiber to the NeighborhoodFTTO Fibre to the OfficeFTZ Fernmeldetechnisches Zentralamt !,

später: Forschungs- und Technologiezentrum !FUB Freie Universität BerlinFuFSt FunkfeststationF.U.N. Free Universe NetworkFUNET Finish University NetworkFuTelG FunktelefongerätFuTelNr FunktelefonnummerFuVE FunkvermittlungseinrichtungFVIT Fachverband Informationstechnik im VDMA und ZVEI

- 31 -

FVK Fachverband Kommunikationstechnik im ZVEIFW - Firmware

- FirewallFWEE Fernwirkendeinrichtung (TEMEX !)FWEG Fernwirkendgerät (TEMEX !)FWLST Fernwirkleitstelle (TEMEX !)FZA Fernmeldezeugamt !FZZA Fernmeldezentralzeugamt !

GG3 Gruppe 3GA General Assembly (ETSI)GAA Gemeinschaftsantennen-AnlageGaAs GalliumarsenidGAEB Gemeinsamer Ausschuss Elektronik im BauwesenGAP Groupe d'Analyse et de PrvisionGAS Groupe Autonome SpecialeGATT General Agreement on Tariffs and TradeGBG Geschlossene BenutzergruppeGBF Gesellschaft für Biotechnologische ForschungGBODS Global bandwidth on demand serviceGC General Purpose Communication ChannelGCC Generic Conference ControlGCHQ Government Communication HeadquarterGCRA Generic Cell Rate Algorithm (ATM)GDCH Gesellschaft deutscher ChemikerGDD Gesellschaft für Datenschutz und DatensicherungGDN Government Data Network (PSPDN in UK)GDO Gesellschaft Deutscher Organisatoren e.V.GDS - Graphical Data Syntax

- General Device Support (Tandem)GDT Generaldirektion TelekomGdT Gemeinschaftsausschuss der Technik, DüsseldorfGDV Gesamtverband des Deutschen EinzelhandelsGEC General Electric CompanyGEDAN Gerät zur dezentralen AnrufweiterleitungGEI Gesellschaft für Elektronische Informationsverarbeitung e.V., AachenGEM Graphic Environment ManagerGEN - Generator

- Global European NetworkGENTEX General Telegram ExchangeGEO Geostationary Earth OrbitGEOFIZ Fachinformationszentrum Rohstoffgewinnung und GeowissenschaftenGF GlasfaserGfA Gesellschaft für Arbeitsmethodik e.V.GFI General Format IdentifierGFP Generic Framing ProcedureGGS Gütegemeinschaft Software e.V.GHPS Geodätischer hochpräziser PositionierungsserviceGI - Gesellschaft für Informatik e. V.

- Group IdentifierGID Gesellschaft für Information und Dokumentation, Frankfurt

- 32 -

GII Global Information InfrastructureGIPS Giga Instructions per SecondGIS Geometrie-InformationssystemGK GatekeeperGKS - Großkundenservice (Deutsche Telekom)

- Graphical Kernel System - Gesamtverzeichnis der Kongress-SchriftenGKV GroßkundenvertriebGLA Geschäftslenkungsausschuss (DIN)GLONAS Global Navigation Satellite SystemGM General MotorsGMB Global Managed Bandwidth (DTAG)GMD Gesellschaft für Mathematik und DatenverarbeitungGNE Gateway-NetzelementGnome GNU Network Object Model EnvironmentGNU GNU's Not UNIX (rekursives Akronym)GOCS GKS oriented Communication SystemGOSIP Government OSI ProfileGPL General Public LicenseGPM Gesellschaft für Projektmanagement Internet DeutschlandGPPS Geodätischer präziser PositionierungsserviceGPRS General Packet Radio Service (Motorola)GPS - Global Positioning System

- Gesellschaft zur Prüfung von Software mbHGPSS General Purpose Simulation SystemGRE Generic Route EncapsulationGrEFuSt Große ErdfunkstelleGS Group Separator (ASCII-Zeichen Nr. 1Dh)GSA General Services Administration, USAGSC Global Standardization GroupGSE Gesellschaft für Software-EngineeringGSF Gesellschaft für Strahlen- und Umweltforschung mbH, NeuherbergGSI - Genérale de Service Informatique

- Gesellschaft für Schwerionenforschung mbH, Darmstadt- Graphical System Interface

GSLB Groupe Special Large Bande (CEPT)GSM - Groupe Spécial Mobile (ursprünglich, CEPT-Expertengruppe)

- Global System for Mobile Communications (jetzt)GSO Geo-Stationary OrbitGSOC German Space Operation Center, OberpfaffenhofenGSR - Giga-Switch Router (Cisco)

- Generic SONET RepeaterGTB Gigabit TestBedGTDI Guidelines for Trade Data InterchangeGTG Glossary Task GroupgTLD generic Top-Level Domain (Internet)gTLD-MoU generic Top-Level Domain Memorandum of UnderstandingGTO Gate Turn-offGTS Global TeleSystems GroupGUI Graphical User InterfaceGUID Global Unique IdentifierG.U.I.D.E. Guidance users integrated data processing equipmentGuP Gütebedingungen und PrüfbestimmungenGUS Guide to the Use for Standards (vorher IG, neuerdings auch "Directory of Functional

Standards")GUUG German Unix Users Group

- 33 -

GVNS-Forum Global virtual network service forumGW GatewayGWD Gesellschaft für wissenschaftliche DatenverarbeitungG-WIN Gigabit-WissenschaftsnetzGx GentexGZS Gesellschaft für Zahlungssysteme des deutschen Kreditgewerbes

HH/PC Handheld Personal ComputerHAC Hearing-Aid CompatibilityHAL Hot-Air LevellingHAN Home Area NetworkHAPS High Altitude Platform StationHAT Hrvatske TelekomunikacijeHATS Harmonization of Advanced Telecommunication SystemsHBCI Homebanking Computer InterfaceHCL Hardware Compatibility List (Microsoft)HCS Header Check SequenceHD - Harmonisierungsdokument (CEN, CENELEC)

- High DensityHDB High Density Bipolar (Code)HDDB Heterogeneous Distributed Database SystemHDE Hauptgemeinschaft des Deutschen EinzelhandelsHDFS High Density Fixed ServiceHDLC High-Level Data Link Control (Procedure)HDSL High-Speed Digital Subscriber LoopHDTV High-Definition Television (Hochauflösendes Fernsehen)HDX HalbduplexHEMT High Electron Mobility TransistorHEPS Hochpräziser Echtzeit-PositionierungsserviceHES Home Electronic SystemsHF - High Frequency (3-30 MHz)

- Human Factors (ETSI Committee)HFC Hybrid Fibre CoaxHfD Hauptanschluss für Direktrufnetz !HFG Handlungs- und Führungsgrundsätze (DTAG)HGF Häufig gestellte FragenHHI Heinrich-Hertz-Institut für Nachrichtentechnik, BerlinHIGGENS Human Interface Graphical Generation SystemHiPer High Precision Personal Location SystemHIPERLAN High Performance Local Area NetworkHIPPI High Performance Parallel InterfaceHIPO Hierarchie + Input-Process-OutputHIS Hochschul-Informations-System GmbH, HannoverHkN HauptkabelnetzHKT Hong Kong TelecomHLC Higher Layer CompatibilityHLR Home Location Register (GSM)HMI - Hahn-Meitner-Institut, Berlin

- Human-Machine InterfaceHNIL High Noise Immunity LogicHoB, HOB Head of BusHoD Head of Delegation (ISO/IEC JTC1)

- 34 -

HOLD Call HoldHOH HDSL OverheadHOLL High Order Leased Line (34, 140 Mbit/s)HomePNA Home Phoneline Networking AllianceHP Hewlett-PackardHPA HauptpotentialausgleichHPC High Performance ComputingHPN High Performance NetHPO High Performance OptionHPOV Hewlett-Packard Open ViewHPPA High Performance Packet Processing UnitHPS High-throughput Packet-SwitchingHS High-Speed ShelfHSCSD High-Speed Circuit Switched DataHSI Hardware-Software-InterfaceHSLAN High Speed Local Area NetworkHSP High Speed Digital ProcessorHSPS High Speed Peripheral ShelfHSRP Hot-Standby Routing Protocol (Cisco)HSSI High Speed Serial InterfaceHSTRA High Speed Token Ring AllianceHT - Horizontal Tabulation (ASCII-Zeichen Nr. 09h)

- Hrvatske TelekomunikacijeHTL High Threshold LogicHTP Handbuch Telekom-Projekte (DTAG)HTTP Hypertext Transfer ProtocolHTTPS Hypertext Transfer Protocol SecureHTTS High Trust Telematic ServicesHURINET Human Rights NetworkHVSt Hauptvermittlungsstelle !HVt Hauptverteiler (DTAG)HW Hardwarehx half duplex, halbduplexHYTAS Hybrides Teilnehmeranschluss-System

II&K Information und KommunikationI&T Information and Telecommunications TechnologiesI/O Input/OutputI-FAX Internet FaxIA - International Alphabet

- Internationales AlphabetIA2 Internationales Alphabet Nr. 2 (Baudot-Code)IA5 Internationales Alphabet Nr. 5 (entspricht "ASCII-Code")IAB Internet Architecture BoardIABG Industrieanlagen-Betriebsgesellschaft, OttobrunnIAC International Advisory CommitteeIAD Integrated Access DeviceIANA Internet Assigned Numbers Authority ⇒ ICANNIAP In-Application ProgrammingIAPH International Association of Ports and HarboursIARU International Amateur Radio Union

- 35 -

IAS Internet Access ServerIATA International Air Transport AssociationIAO (Fraunhofer-) Institut für Arbeitswirtschaft und Organisation, StuttgartIATA International Air Transport AssociationIBC Integrated Broadband CommunicationIBCN Integrated Broadband Communications NetworkIBD Integrated Boot DeviceIBFN Integriertes BreitbandfernmeldenetzIBGP Internal Border Gateway ProtocolIBI Internet-Business InfrastructureIBL Inter-Business Link (DTAG)IBM International Business Machines CorporationIBN Belgian Institute for StandardizationIBO Input-Back-OffIBS Intelsat Business ServiceIBTE Institution of British Telecommunications EngineersIBZ Informationssysteme mit besonderer ZweckbestimmungIC - Integrated Circuit

- Interconnection- Integrity Check- Industry Canada

ICA - Information Content Architecture

ICAA International Civil Airports AssociationICAN Individual Customer Access NetworkICANN Internet Corporation for Assigned Names and NumbersICAO International Civil Aviation OrganizationICAs Interconnection-AnschlussleitungICC - International Chamber of Commerce

- International Conference on Communications- Integrated Circuit(s) Card

ICCC International Council for Computer CommunicationsICDCS International Conference on Distributed Computing SystemsICDSC International Conference on Digital Communications by SatelliteICE - Interconnection Environment (DTAG)

- Image Clear Enhancement (PC-Monitore)ICI - Interface Control Information

- Interexchange Carrier Interface (SMDS)ICM - Integrated Computer Modules

- Isochronous Channel MapperICMP Internet Control Message ProtocolICN Siemens Information and Communication NetworksICOT Institute for New Generation Computer Technology, JapanICP International Customer Projects (DTAG)ICQ I seek youICRA Internet Content Rating AssociationICS - International Chamber of Shipping

- Implementation Conformance Statements- International Classification for Standards

ICSC International Customer Support Center (DTAG)ICST Institute for Computer Sciences and TechnologyICSTI International Council for Scientific and Technical InformationICT Information and Communication Technologies

- 36 -

ICU Isochronous Channel UserICUG International Closed User GroupICW Internet Call WaitingID Interface DataIDA - Integrated Digital Access

- Integrated Data ArchitectureIDATE Institut de l'audiovisuel et de télécommunications en EuropeIDC International Data CorporationIDE Intelligent Drive ElectronicsIDEA International Data Encryption AlgorithmIDEM Inter-Departmental Electronic Mail Project, UKIDI Initial Domain IdentifierIDL Interface Definition LanguageIDLC Integrated Digital Loop CarrierIDN Integriertes Text- und DatennetzIDP Initial Domain PartIDRP Inter-Domain Routing ProtocolIDS - Institut für Deutsche Sprache

- Informations-, Datenübertragungs- und Steuerungssysteme (GmbH)- Intelligent Device Support- Intrusion Detection System

IDSL ISDN Digital Subscriber LoopIDU - Interface Data Unit

- Indoor UnitIDV Individuelle DatenverarbeitungIEC International Electrotechnical CommissionIEEE Institute of Electrical and Electronical EngineersIEPRC International Electronic Publishing Research CentreIES Information Exchange System (ESPRIT)IESG Internet Engineering Steering GroupIETF Internet Engineering Task ForceIFD Interface DeviceIFIP International Federation for Information ProcessingIFMA International Facility Management AssociationIFPUG International Function Point Users GroupIFRB International Frequency Registration Board

(Internationaler Ausschuss für Frequenzregistrierung)IFS Information flows, technical features of services (CEPT-Arbeitsgruppe)IG Implementation Guide, jetzt GUSIGAP Interaktiver Grafischer ArbeitsplatzIGBT Insulated Gate Bipolar TransistorIGCT Integrated Gate-Commutated ThyristorIGES Initial Graphics Exchange SpecificationIGMP Internet Group Management ProtocolIGP Internet Gateway ProtocolIGRP Interior Gateway Routing ProtocolIGS - Internationales Gateway-System (Btx)

- Identify Graphic Subrepertoire (MHS)IGW Isochronous GatewayIIA Information Interchange ArchitectureIIC International Implementation Center (DTAG)IIJ Internet Initiative of JapanIIL Ion Implantation Logic

- 37 -

IIP Internet Imaging ProtocolIIRIAM Institut International de Robotique et d'Intelligence Artificielle de MarseilleIIS Internet Information ServerIKA Interne KommunikationsanlageIKD Internationaler Kongress für DatenverarbeitungIKE Internet Key ExchangeIKS Informations- und KommunikationssystemIL Internationale Leitung (DTAG)ILEC Incumbent Local Exchange Carrier

ILMI Interim Layer Management InterfaceIM - Initialization ModeIMA Inverse Multiplexing over ATMIMAP Internet Message Access ProtocolIMAPEXT Internet Message Access Protocol ExtensionIMG Inter-Metropolitan Area Network (MAN) Switching System GatewayIMI - International Management Institute, Genf

- Inter-Metropolitan Area Network (MAN) Interface (CBDS)IMO International Maritime OrganisationIMPDU Initial MAC Protocol Data UnitIMT - International Mobile Communications

- Inter-Machine TrunkIN Intelligent NetworkINA Intelligent Network ArchitectureINAP Intelligent Network Application ProtocolINB Innovationsbeauftragter (DTAG)Ind indication (primitive)IND International Network DesignatorINDI-VSt Informations- und Dialogdienst-VermittlungstellenINI Industrial Networking Incorporation (GE-Tochter, MAP-Chips)INKA Internationale KreditkarteINMARSAT International Maritime Satellite OrganisationINMC International Network Management Center (DTAG)INRA (National Agronomical Research Institute)INRIA Institut National de Recherche en Informatique et en Automatique (Frankreich)INS - Information Network System (NTT)

- Integrated Networks SystemINSEM Inter-institutional Service for Electronic Mail (INSIS, EG)INSERM (Health and Medical Research Institute)INSIS Inter-institutional Integrated Services Information System (EG)INSTAC Information Technology Research and Standardization CenterINSYL Informationssystem über die Liefersituation von Teilnehmereinrichtungen (Btx)INTAMIC International Association for Microcircuit CardsINTAP Interoperability Technology Association for Information ProcessingINTELSAT International Telecommunications Satellite Organization (Internationale

Fernmeldesatelliten-Organisaton)InterNIC International Network Information CenterINTERSPUTNIK International Organisation for Space CommunicationsINTUG International Telecommunications Users GroupIOC - International Operations Centre

- ISDN Ordering Code- Independant Operating Company

IOM ISDN Oriented Modular ArchitectureIOS Internet Operating System (Cisco)

- 38 -

IOT - Institut für Organisationsforschung und Technologieanwendung, München- In-orbit-Test

IP - Internet Protocol- Information Processing

IPA Fraunhofer-Institut für Produktionstechnik und Automatisierung, StuttgartIPAD Integrated Passive and Active DevicesIPC - Inter-Process Communication

- International Planning Center (DTAG)IPDC Internet Protocol Device ControlIPGW Internetwork Protocol GatewayIPDS Inmarsat Packet Data SystemIPLC International Private Leased CircuitsIPM Interpersonal Messaging (MHS) (Interpersonelle

Mitteilungs-Übermittlung)IPMS Interpersonal Messaging System (MHS)IPng Internet Protocol next generationIPR Intellectual Property RightsIPRC Intellectual Property Rights CommitteeIPS - Information Processing Systems

- Intelligent Protection SwitchingIPSec Internet Protocol SecurityIPTC International Press Telecommunications CouncilIPv4 Internet Protocol version 4IPv6 Internet Protocol version 6IPX Internet Packet ExchangeIRA International Reference AlphabetIRB Informationszentrum Raum und BauIRC International Reply CouponIrDA Infrared Data AssociationIRDS Information Resource Dictionary SystemIRONMAN Integriertes regionalisiertes objektorientiertes Netzmanagementsystem (DTAG)IRS Information Retrieval ServiceIRSG Internet Research Steering GroupIRSL Inter Router Serial LinkIRTF Internet Research Task ForceIRTM Information Retrieval, Transfer and Management for OSI (Titel von ISO TC97/SC21

")IRU International Road UnionIS - International Standard

- Intermediate SystemIS-IS Internediate System to Internediate SystemISA - Instrument Society of America

- Industry Standard Architecture (= PC-AT)ISAM Indexed Sequential Access MethodISAPI Internet Server Application Programming InterfaceISB InterShelf BusISC International Switching CentreISCC International Service Coordination Center (DTAG)ISCI Internet Subscriber Controlled Input (DTAG)ISCS International Shared Cost ServiceISCTI Istituto Superiore delle Comunicazioni e delle Tecnologie dell'InformazionISDN Integrated Services Digital NetworkISDN-B Breitband-ISDN (s. auch IBFN)ISDN-S Schmalband-ISDN

- 39 -

ISDS International Switched Data ServicesISDU Isochronous Service Data UnitISE Integrated Switching ElementISG Incoming Service GroupingISID Idle Signal Identification (T1-System)ISIS Integriertes System zur Bereitstellung der Netzinfrastruktur auf optischer BasisISIT Interministerieller Ausschuss für Sicherheit in der InformationstechnikISiT Institut für Silizium-TechnologieISL Intersatellite Link SystemsISLI Informationssystem KabelliniennetzISM - ISDN Standards Management (ETSI Committee)

- Industrial, Scientific and Medical (Frequenzbänder)ISO International Organization for StandardizationISOC Internet SocietyISP - International Standardized Profile (ISO)

- Internet Service Provider- In-System Programming

ISPA International Society of Parametric AnalystsISPS Information Society Project SwitzerlandISS - International Switching Symposium

- Informationsplanungs- und -steuerungssystemISSB Information Services Standards Board (ANSI)ISSCC International Solid State Circuits ConferenceISSI Inter-switching System InterfaceISSLS International Symposium on Subscriber Loops and ServicesISU Isochronous Service UserISUP ISDN User PartIT Information TechnologyIT/T Informationstechnologie und TelekommunikationIT&T DATECH/DEKITZ/BAPT/Gemeinsames Sektorenkomitee IT&TITA International Telegraph AlphabetITAEGC IT-Adhoc Experts Group on CertificationITAEGS IT-Adhoc Experts Group on StandardisationITC - International Transmission Center (DTAG)

- Isochronous-sample Transfer ControlITCG Information Technology Coordination Group (IEC)ITG Informationstechnische Gesellschaft im VDEITI Industrial Technology Institute, USA (MAP-Bemühungen)ITK Institut Telekommunikation GmbH DarmstadtITMG Joint Information Technology Management GroupITN-D Internationales TransportnetzITRC Information Technology Requirement CouncilITS Information Technology StandardizationITSC Interregional Telecommunications Standardization ConferenceITSTC Information Technology Steering Committee (CEN/CENELEC/ETSI)

Comité de direction de la technologie de l'informationITSP Internet Telephony Service ProviderITTF Information Technology Task Force (ISO)ITTTF Information Technology and Telecommunication Task Force (EC)ITU International Telecommunication UnionITU-R ITU Radio Communication SectorITUSA Information Technology Users Standards AssociationITUT Internationales Transferzentrum für UmwelttechnikITU-T ITU Telecommunication Standardization Sector (existiert seit 01.03.1993)

- 40 -

IU Interface UnitIUAC INSIS Users Advisory CommitteeIuD Information und DokumentationIuK Information und KommunikationIUT Implementation Under TestIV InformationsverarbeitungIV-AG IV-Anwendung(en) (DTAG)IVBB Informationsverbund Bonn-BerlinIVR Interactive Voice ResponseIW Institut der deutschen Wirtschaft, KölnIWF Interworking FunctionIWU Interworking UnitIWV ImpulswählverfahrenIXC Inter-Exchange CarrierIZ Informationszentrum SozialwissenschaftenIZB Informationszentrale BayernIZE Instandsetzungszentrum extern ! (DTAG)IZM Informationszentrum Mobilfunk

J

J2EE Java-2 Enterprise EditionJANET Joint Academic networkJCG Joint Coordination GroupJEDEC Joint Electronic Device Engineering CouncilJEEC Joint ECMA/ETSI Coordination GroupJEG Joint Experts GroupJESSI Joint European Submicron Silicon InitiativeJICCAR Joint Industry Committee for Cable Audience ResearchJICST Japan Information Center for Service and TechnologyJISC Japanese Industrial Standards CommitteeJIT Just in TimeJITEC Joint Information Technology Experts CommitteeJNI Java Native InterfaceJNT Java Network TechnologyJOCE Journal Officiel de la Communauté EuropéenneJPEG Joint Photographic Experts GroupJPG Joint Presidents GroupJRC Joint Research CooperationJSA Japanese Standards AssociationJTC ISO/IEC Joint Technical CommitteeJTM Job Transfer and ManagementJTPC Joint Technical Programming CommitteeJURIS Juristisches InformationssystemJUST Japanese Unified Standards for Telecommunications for Personal ComputersJVM Java Virtual Machine

KKAM Kundenauftragsmanagement (DTAG)

- 41 -

KBSt Koordinierungs- und Beratungsstelle der Bundesregierung für Informationstechnik inder Bundesverwaltung

KDD Kokusai Denshin Denwa (Japan)KDE K Desktop Environment (Linux)KDG Kabel Deutschland GmbHKDIR Kundendirektion (DTAG)KDS Kommunikationsdatensatz (DTAG)KDZ KommunikationsdatenzeileKEG Kommission der Europäischen GemeinschaftKEPROM Key-EPROMKF KommunikationsfallKFA Kernforschungsanlage Jülich GmbHKfK Kernforschungszentrum Karlsruhe GmbHKFM K File Manager (Linux)KGF Konzerngeschäftsfeld (DTAG)KI Künstliche IntelligenzKIC Cardholder Identification KeyKIO Kerninformationsobjekt (DTAG)KlEFuSt Kleine ErdfunkstelleKMC Key Management CenterKMU Kleine und mittlere UnternehmenKNL Kundenniederlassung (DTAG)KNM Kundennetzmanager (DTAG)KNMC Kundennetzmanagementzentrum (DTAG)KNQNet Karstadt-Neckermann-Quelle-NetzKobit Koordinierungs- und Beratungsstelle für Informationstechnik (Land Sachsen)KONTES Kundenorientierte Neuorganisation der Teilnehmerdienste mit elektronischen

Systemen (DTAG)auch:Kundenorientierte Neuorganisation der Teilnehmerdienste mit Einsatz von IV-Systemen (DTAG)

KONTES-ANDI - ~, AnmeldedienstKONTES-AUDI - ~, AuskunftsdienstKONTES-BUDI - ~, BuchdienstKONTES-FEDI - ~, FernsprechentstörungsdienstKONTES-ORKA - ~, OrtsanschlusskabelbeschaltungKONTES-REDI - ~, FernmelderechnungsdienstKSA Kommunikations-Struktur-AnalyseKSC Konzernservicecenter (DTAG)KSS Kunden-Service-SwitchKSV Kanalteiler und SchnittstellenvervielfacherKtK Kommission für den Ausbau des technischen KommunikationssystemsKTL Kingston Telecommunications Laboratories (UK test lab)KTS Key Telephone SystemKU KupferKUBENETZ Kurzfristige Bewirtschaftung des Telefonnetzes/ISDN (DTAG)KVSt Knotenvermittlungsstelle !KZG Kartenzugangsgerät

LL2 Layer 2 (OSI)L2F Layer 2 Forwarding

- 42 -

L2TP Layer 2 Tunneling ProtocolL3 Layer 3 (OSI)LAE Leitungsanschluss-EinsatzLAF Length or Additional FieldsLAN Local Area NetworkLAN3 Ethernet/802.3 LAN Bridge ModuleLAN5 Token Ring/802.5 LAN Bridge ModuleLAP Link Access Protocol (Schicht 2 des OSI-Modells)LAPB Link Access Procedure BalancedLAPD Link Access Procedure for ISDN D ChannelLAPM Link Access Procedure for ModemsLATA Local Access Transport AreaLBA Logical Block AddressingLBB LAN Bridge Backplane ModuleLBMK3 IEEE 802.3 Ethernet LAN Bridge Management KITLBMK5 IEEE 802.5 Token Ring LAN Bridge Management KITLBO Line Bildout NetworkLBS - Lieferantenbeurteilungssystem (DTAG)

- Location Based ServicesLBU Local Business UnitLBZ LeitungsbezeichnungLC Line CardLCA Logic Cell ArrayLCD Liquid Cristal DisplayLCP Link Control ProtocolLCR - Least Cost Router

- Least Cost RoutingLCT Last Compatible Time (ATM)LD Long DistanceLDAP Lightweight Directory Access ProtocolLDC Least Developed CountryLD-CELP Low delay Code-Excited Linear PredictionLDP Label Distribution ProtocolLDPS Linux Development Platform SpecificationLEC Local Exchange CarrierLED Light Emitting DiodeLEGBAC Limited Exploratory Group on Broadcast to Aeronautical CompatibilityLENA Leitungsbedarf nach Angeboten für den Auslandsverkehr (DTAG)LEO Low Earth OrbitLEPM Leitungsendgerät für Primärmultiplex-VerbindungenLF - Low Frequency (30-300 kHz)

- Line Feed (ASCII-Zeichen Nr. 0Ah)LFI Link Fragmentation and InterleavingLH Line HuntingLHE Local Head EndLI Length IndicatorLi18nux Linux Internationalisation InitiativeLIC Location Identification CodeLIDAR Light Detecting and RangingLIFIA Laboratoire d'Informatique Fondamentale et d'Intelligence ArtificielleLIFO Last In First OutLIN Line in ModuleLISP List Processing Language

- 43 -

LIT Landesbetrieb für Informationstechnik (Berlin)LIU Line Interface UnitLLC - Logical Link Control (LAN)

- Lower Layer CapabilitiesLLMC Leased Link MultichannelLM Leistungsmerkmal (DTAG)LMDS Local Multipoint Distribution SystemLME Layer Management EntityLMI - Layer Management Interface

- Local Management InterfaceLNC Local Node ClockLOF Loss of FrameLOI - Low-Order Interface

- Letter of IntentLOS - Loss of Signal

- Loss of Synchronisation- Line of Sight

LOTOS Language for Temporal Ordering Specification (FDT)LOUT Line out ModuleLPC Linear Predictive CodeLPDA Link Problem Determination Aids (IBM)LRC Longitudinal Redundancy CheckLRQA Lloyd’s Register Quality Assurance LimitedLRZ Leibniz-RechenzentrumLS Link-StateLSA Link-State AdvertisementLSAU Low-Speed Packet Access UnitLSB - Least significant bit

- Linux Standard BaseLSP - Link-State Protocol Data Unit

- Link-State PacketLSPS Low Speed Peripheral ShelfLSS Link Status SubfieldLSSU Link Status Signal Unit (ZZK)LST LeitstelleLSZ LeitungsschlüsselzahlLT - Line Termination

- Line TaskLTCC Low-Temperature Co-fired CeramicsLTE Line Terminating EquipmentLTU Line Transfer UnitLUCY Leased Link City Speed (DTAG)LUE Leitungsumsetzer-Einsatz (DTAG)LUT Line-up TestLVC Label Virtual CircuitLVD Low-Voltage DirectiveLVDS Low-Voltage Differential SignallingLVT Low-Voltage TechnologyLVz Leitungsverzweiger (DTAG)LXC Local Cross-ConnectorLZ Logistikzentrum (DTAG)LZBT Lempel-Ziv British Telecom

(Datenkompressionsalgorithmus = ITU-T V.42bis)

- 44 -

LZJH Lempel-Ziv/Jeff Heath(Datenkompressionsalgorithmus = ITU-T V.44)

LZW Lempel-Ziv/Welsh (Datenkompressionsalgorithmus)

MMA Maintenance and AdaptationMAAS Management Application Access StackMAC - Media Access Control

- Message Authentication Codes- Multiplexed Analogue Components

MACF Multiple Association Control FunctionMACS Management and Control SystemMAG Metropolitan Area GatewayMAJG Mitarbeiterjahresgespräch (DTAG)MakTel Makedonski TelekomunikaciiMALC Manager of Access Line ConcentratorMAN Metropolitan Area NetworkMANISAN MAN Isochronous Service Access NumberMANSAP MAN Service Access PointMAP - Manufacturing Access Protocol

- Manufacturing Automation Protocol (GM)- Mobile Application Part

MAPDU Management Application Protocol Data UnitMARS Measures and Requirements for Security (ESPRIT)MAU - Medium Attachment Unit

- Multiple Access UnitMBB Messerschmitt-Bölkow-Blohm, OttobrunnMBGW Multibus GatewayMBI Multibus I InterfaceMBR Master Boot Record (Microsoft)MBS - Message Box Service

- Maximum Burst Size (ATM)MBU Multibus UnitMCC Microelectronics and Computer Technology Corporation, USAMCBF Mean Cycles Between FailureMCF MAC Convergence FunctionMCG Motorola Computer GroupMCI Media Control InterfaceMCID Malicious Call IdentificationMCML Multiclass Extensions to Multilink-PPPMCNS Multimedia Cable Network SystemMCP Multiplexed Communication ProtocolMCPPP Multi-Chassis Point-to-Point ProtocolMCPU Multibus CPUMCR Minimum Cell Rate (ATM)MCS Multipoint Communication ServiceMCU Multipoint Control UnitMCVS Multimedia Conversational ServicesMD Management Domain (MHS)MD5 Message Digest 5MDC Modification Detection Codes

- 45 -

MDF Main Distribution FrameMDI Medium-Dependent InterfacemDNAE managebare Datennetzabschlusseinrichtung (DTAG)MDNS Managed Data Network Services (CEPT-Projekt)MDU Maintenance and Debugging UnitMED Multi-Exit DiscriminatorMEDA Mixed Erlang Distributions for ApproximationMEG Mobile Expert GroupMEGAPLAN Menügesteuertes interaktives geografisches Informationssystem für Dokumentation

und Planung von Telekommunikationsanlagen (DTAG)MEMS Mikroelektromechanische SystemeMEO Medium Earth OrbitMES Manufacturing Execution SystemMF - Medium Frequency (0,3-3 MHz)

- Multi-FrequencyMFC Multi-Frame CounterMFJ Modification of Final JudgmentMF-TDMA Multi-Frequency Time-Division Multiple AccessMFV Mehrfrequenz-Wählverfahren = DTMFMFW Multifunctional WorkstationMGC Media Gateway ControllerMGCP Media Gateway Control ProtocolMGT ManagementMH - Message Handling

- Management-HandbuchMHC MII to HSSI ConverterMHP Multimedia Home PlatformMHS Message Handling Systems (MHS) (Mitteilungs-Übermittlungs-System)MI Message IdentifierMIB Management Information BaseMIC - Message Integrity Codes

- Microwave Integrated CircuitMICA Modem ISDN Channel AggregationMID Message IdentifierMIDA Distributed Application for Message InterchangeMIDI Musical Instruments Digital InterfaceMIDL Microsoft Interface Description LanguageMIDS Management Information Services StandardizationMIF Memory InterfaceMII Module Interconnect InterfaceMIL Military Standard Document Interchange Format Project (IPSC-0214)MIM MSS Interface ModuleMIME Multipurpose Internet Mail ExtensionMINISTREL Models for Information Storage and RetrievalMIPS - Management Information Protocol Specification

- Million Instructions per Second- Mega Instructions per Second

MIS - Management Information System- Management Information Service

MISD Management Information Service DefinitionMITI Ministry for International Trade and Industry (Japan)MK MarkMKS Management-Kommunikationssystem (DTAG)

- 46 -

MKV B Markt- und Kundenverantwortlicher Business (DTAG)MKV C Markt- und Kundenverantwortlicher Consumer (DTAG)MLE Multi-Layer EnvironmentMLP Multi-Link ProcedureMLPP Multi-level Precendence and PreemptionMLPPP Multi-Link Point-to-Point ProtocolMLQAM Multi-Level Quadrature Amplitude ModulationMM - Multi-Media

- Module ManagerMMAP Multi-Media Access ProfileMMC Meet-Me ConferenceMMDF Multi-Memo Distribution FacilityMMDS Microwave Multipoint Distribution SystemMMFS Manufacturing Message Format SpecificationMMI Man-Machine InterfaceMMIC Microwave Monolithic Integrated CircuitMML Man-Machine-LanguageMMP Multi-Link Multi-Chassis Point-to-Point ProtocolMMS - Multimedia Software GmbH

- Manufacturing Message Specification- Multimedia Message System

MMS 43 Modified Monitoring State Code mapping 4 bits into 3 ternary symbols (≡ 4B3T)MMU Memory-Management-UnitMMX Multimedia ExtensionMNP Microcom Networking ProtocolMOBIDA Mobile DatenerfassungModem Modulator/DemodulatorMOGLI Mobiles Glasfaser-InformationssystemMoIP Modem over Internet ProtocolMoon Management of optical networksMOS - Metal-Oxide-Semiconductor

- Mean Opinion ScoreMOSES Modulares System zur Entstörung an SchnittstellenMOTIS Message Oriented Text Interchange System (MHS)MoU - Memorandum of Understanding

- Minutes of UseMP Multi-Link Point-to-Point ProtocolMPC Multi-peer CommunicationMPCC Multi Protocol Communication ControllerMPDT Multi-peer Data TransmissionMPDU - Message Protocol Data Unit (MHS)

- MAC Protocol Data UnitMPEG Motion Pictures Expert GroupMPG Max-Planck-Gesellschaft zur Förderung der Wissenschaft e.V., MünchenMPI Max-Planck-InstitutMPLS Multi-Protocol Label SwitchingMPM Multilateral Planning MeetingMP-MLQ Multi-Pulse Maximum Likelihood Quantization (ITU-T G.723)MPP Message Path ProgramMPT Ministry of Posts and TelecommunicationsMRAM Magnetic Random Access MemoryMS - Multiplex Section

- Member State- Mobile Service

- 47 -

- MicrosoftMS-DOS Microsoft Disk Operating SystemMSAP MAC Service Access PointMSB Most significant bitMSC - Management Service Control

- Mobile Service Switching Center (GSM)MSDN Multiple Service Data NetworksMSDP Multicast Source Discovery ProtocolMSDU MAC Service Data UnitMSG MediaServices GmbHMSI Medium Scale IntegrationMSL Macros-Structure-LanguageMSO Multiple System OperatorMSOH Multi-Section OverheadMSP - Modularer Service PC

- Manual Switching PositionMSR Mess-, Steuer- und RegeltechnikMSS - Multispektralscanner

- Mobile Satellite Services- Metropolitan Arean Network (MAN) Switching System

MSSDCP Metropolitan Arean Network (MAN) Switching System Dependent ConvergenceProtocol

MSU Message Signalling Unit (ZZK)MSV Medium Speed Version (SIEMENS)MSX Microsoft Super ExtendedMT Message TransferMTA - Managementtechnik Ausland (DTAG)

- Message Transfer Agent (MHS) (Mitteilungs-Transfer-Systemteil)MTAE Message Transfer Agent Entity (MHS)MTBF Mean Time Between FailuresMTCAG Memorex Telex Communications AG (Österreich)MTCE Maintanance Control EquipmentMTL Message Transfer Layer (MHS)MTP Message Transfer PartMTS - Mobile Telesystems (Russland)

- Message Transfer Service- Methods of Testing and Specifications- Multi-wavelength transport system

MTTR Mean Time to RepairMTU Maximum Transmission UnitMuBIS Multimediales BüroinformationssystemMULTOS Multimedia Office ServerMÜW Monopol-ÜbertragungswegMUX MultiplexerMVC Multicast Virtual CircuitMVL Multiple-Valued LogicMVNO Mobile Virtual Network OperatorMVS - Multiple Virtual System (IBM)

- Multiple Virtual StorageMVSt Mutter-VermittlungsstelleMW Multilink WindowMWI Message Waiting IndicatorMWM Motif Window Manager

- 48 -

NN... Network ...NA - No-Action (alarm)

- Node Address- Non-Arbitrated (slot) -Network Aspects (ETSI Committee)

NAFTA North American Free Trade AssociationNAK Negative Acknowledge (ASCII-Zeichen Nr. 15h)NAKODA Nachverarbeitung von Kommunikationsdatensätzen der digitalen

Vermittlungstechnik Ausland (DTAG)NAMAS National Measurement Accreditation ServiceNANP North-American Numbering PlanNAPI Network Access Point IdentifierNAPLPS North America Presentation Level Protocol SyntaxNAS - National Advanced Systems

- Network Attached Storage- Network Access Server

NASA National Aeronautic and Space AdministrationNA-SAC Non-Arbritated Slot Access Control (entity)NAT Network Address TranslationNATO North Atlantic Treaty OrganizationNATOA National Association of Telecommunications Officers and AdvisorsNBAR Network-Based Application RecognitionNBBS Neues Bewertungs- und Bezahlungssystem (DTAG)NBI North-Bound InterfaceNBS National Bureau of Standards, jetzt: NISTNC Network ConnectionNCC - National Computer Conference

- National Computing Centre, England- Network Coordination Centre

NCM Non-isochronous Channel MapperNCM TPDU Network Connection Management Transport Protocol Data UnitNCMC TPDU Network Connection Management Confirmation Transport Protocol Data UnitNCMS Network Connection Management SubprotocolNCN Nixdorf Communication NetworkNCP Network Control ProtocolNC-REC Network Connection Recovery IndicatorNC-REF Network Connection ReferenceNCS Network Configuration SubfieldNCSA National Center for Supercomputing (USA)NCT - Network Control Tool

- Normal Call TransferNCTE Network Channel Terminal EquipmentNCU Non-isocronous Channel UserNDA Non-Destructive ArbitrationNDM Normal Disconnected ModeNDU Non-delivery notification (MHS)NE - Netzelement

- Network ElementNE2SYN Netztakt-Einspeisegerät 2,048 Mbit/s zur Synchronisation (DTAG)NEBS Network Equipment Building Ssystem (Requirements)NEC - Nippon Electric, Japan

- 49 -

- Netherlands Electrotechnical CommitteeNED National ETSI DelegationNEFF Next Extended Facilities FieldNEHS Network Event History ScreenNEM Network Element ManagerNEMA National Electrical Manufacturers Association (USA)NET - Norme Européenne de Télécommunication

- Network Entity TitleNEXT Near-end Crosstalk (Nahnebensprechen)NFGt, NFGT NachrichtenfernschaltgerätNFrE Normalfrequenz-Einsatz (DTAG)NFTH Nordic Forum for Telecommunication and DisabilityNGN Next Generation NetworksNGSO Non-Geostationary OrbitNI - Netzinfrastruktur (DTAG)

- Normungsausschuss Informationstechnik (DIN)- Network Interface

NI-2 National ISDN Phase 2 (USA)NID Network Interface DeviceNI-FBK NI Farbbänder und FarbbandkassettenNI-MMS NI Mensch-Maschine-Schnittstelle für BüroanwendungenNI-MTK NI Maschinen zur Textverarbeitung und -kommunikationNIA Network Interface AdapterNIA Network Interface ControllerNIC - New Image Communication

- Network Information CenterNIST National Institute of Standards and Technology (USA), vormals NBSNIU Network Interface UnitNIUF North-American ISDN Users' Forum (USA)NIWO Neue ⇒ IRONMAN Windows-OberflächeNK - Netzknoten

- NetzkommunikationNKoSt NetzkontrollstelleNKRO N-Key-Roll-OverNL - Niederlassung (DTAG)

- Netzlogistik (DTAG)- New Line- Network Layer

NLOS Non-Line of SightNLPID Network Layer Protocol IdentifierNLQ Near Letter QualityNLS National Language Support (MS-DOS)NMA Next MAC AddressNMB NetzmanagementbaugruppeNMC Network Management CenterNMCC Network Management Center (NMC) ConnectionNMC-DCP Network Management Center (NMC) Device Convergence ProtocolNMC-IP Network Management Center (NMC) Interconnection ProtocolNMC-I WU Network Management Center (NMC) Interworking UnitNMDG Network Management Development Group (ITU)NMES Network Module Events ScreenNMF Network Management Forum

- 50 -

NMI Network Management InterfaceNMOC Network Management Operations CenterNMP 1. Network Management Protocol 2. Network Management ProcessNMPE Network Management Protocol EntityNMS Netzmanagementsystem; Network Management SystemNMT Nordic Mobile Telephone SystemNMTI Node Management Terminal InterfaceNNI - Netzschnittstelle (DTAG)

- Network-to-Network Interface- Network Node Interface (ATM)- Netherlands Normalisation Institute

NNL Netzeniederlassung (DTAG)NNTP Network News Transfer ProtocolNOC Network Operations CenterNOS Network Operating SystemNPAI Network Protocol Address InformationNPC Network Parameter Control (ATM)NPDN Nordic Public Data NetworkNPDU Network Protocol Data UnitNPID Network Provider IdentificationNPL National Physical Laboratory, TeddingtonNPRM - Notice of Proposed Rulemaking (FCC)

- Network Performance Report MessageNR Network Operator ByteNRM Normal Response ModeNRTL Nationally Recognized Testing Laboratory (USA)NRZ non return to zeroNRZI non return to zero invertedNS Network ServiceNSA - Nummernschalter-Arbeitskontakt

- National Security AgencyNSAP Network Service Access PointNSCC North Sea Communications ConferenceNSDU Network Service Data UnitNSES Network Service Events ScreenNSF National Science Foundation (USA)NSH Nordic Cooperation on DisabilityNSI - Nummernschalter-Impulskontakt

- Network Solutions Inc.NSO National Standardisations OrganisationNSR Nummernschalter-RuhekontaktNSSA Not-so-stubby AreaNSSDC National Space Science Data Center (NASA)NSÜ Netzsteuerungs- und ÜberwachungssystemnT Nutzungszeitabhängige TarifierungNT - Northern Telecom

- Network TerminationNTA Network Termination AnalogueNTaE Normaltakt-EinsatzNTBA - Network Termination Basic Access

- Netzterminal BasisanschlussNTC Negative Temperature CoefficientNTG Nachrichtentechnische GesellschaftNTIA National Telecommunications and Information Administration

- 51 -

NTIS National Technical Information ServiceNTP - Network Termination Point

- Network Time Protocol- Netztauglichkeitsprüfung (DTAG)

NTPM - Network Termination Primary Rate Multiplexer- Netzterminal Primärmultiplexanschluss

NTRAC New Technical Recommendation Application CommitteeNTSC National Television Standards CommitteeNTT Nippon Telegraph and TelephoneNTU Network Termination UnitNUA - Network Users Association

- Network User Address (DATEX-P)NU Non-Urgent (alarm)NUI Network User Identification (DATEX-P)NVM Non-volatile MemoryNVOD Near Video on DemandNVS National Videotex SystemNWI New Work ItemNzhQ Netz mit hoher QualitätNZN Niedersächsischer Zeitschriftennachweis

OO/R Originator/RecipientOA&M Operations, Administration and MaintenanceOAI Operator Access InterfaceOAM Operation and MaintenanceOAP Optical Application PackOASIS - Open and Secure Information Systems (EUREKA)

- Outil d'aide à la specification interactif et structuré- Organization for the Advancement of Structured Information Standards

OAsl OrtsanschlussleitungOBIS Online-BibliothekssystemOC Optical CarrierOCB-F Outgoing Call Barring – FixedOCB-UC Outgoing Call Barring – User ControlledOCCS Optical Crossconnect SystemOCI Overseas Carrier InterfaceOCM Operation Control ManagerOCN Optical Carrier NetworkOCR Optical Character RecognitionOCX Optical SwitchOCXO Oven Controlled Crystal OscillatorODA Office Document ArchitectureODBC Open Database Connectivity (MS Windows)ODE Open Development EnvironmentODETTE Organisation pour les données par télétransmission en Europe (Organisation for Data

Exchange by Teletransmission in Europe)ODIF Office Document Interchange FormatODMA Open Document Management API (Application Programming Interface)ODP Open Distributed ProcessingODS Open Distributed Systems

- 52 -

ODU Outdoor UnitO/E optisch/elektronischOECD Organization for Economic Cooperation and DevelopmentOECOS Organisations-Engineering für Kommunikations- und OrganisationssystemeOFDM Orthogonal Frequency Division MultiplexingOEM Original Equipment ManufacturerOFM Oberflächenmontage = SMDOFS Out of Frame SecondsOftel Office of Telecommunications, UKOHB Overhead Backplane ModuleOHU Overhead Unit BypassOIW OSI Implementors' WorkshopÖKartTel Öffentliches KartentelefonOLE Object Link Embedding (MS-WINDOWS)OLIB Online Informations- und BeratungssystemOLT Optical Line TerminationOLTE Optical Line Termination EquipmentOMAP Open Multimedia Application PlatformOMB Office of Management and Budget, USAOMC Operation and Maintenance Center (GSM)OMIX Open Module Interface for XDSLON Österreichisches NormungsinstitutONA Open Network ArchitectureONP Open Network ProvisionONU Optical Network UnitOOB Out-of-bandOODB Object-oriented DatabaseOOF Out-of-FrameOOS Out of ServiceOPAL Optische AnschlussleitungOPDU Operation Protocol Data UnitOpennet Modulare Implementation der 7 Schichten im LANOPES Open Pluggable Edge ServicesOPEX Olympus Experimentatoren GruppeOPS - Open Profiling Standard

- Off-Premise StationOPSB Overhead Power Supply BackplaneOPT Open Packet TelephonyORBES Ortsnetzbereinigung und StabilisierungORI Optimierter Ressourceneinsatz für Interconnectionanschlüsse (DTAG)ORKA Ortsanschlusskabelbeschaltung (DTAG)ORSTOM Organisation for Scientific Research in over sea countriesOS Operating SystemOS/2 Operating System/2OSB Oberer SonderkanalbereichOSCRL Operating System Command and Response LanguageOSCS Open Systems Communication SupportOSF Open Software FoundationOSI Open Systems InterconnectionOSIE OSI EnvironmentOSIS Open Shops for Information ServicesOSITOP OSI - Technical and Office ProtocolsOSN Optical Service NodeOSNS Open System Network Support (IBM)

- 53 -

OSP Open Settlement ProtocolOSPF Open Shortest Path FirstOSS - One-Stop Shopping

- Operating Support SystemOSTC Open Systems Testing Consortium (früher: CTS-WAN)OT Operation TypeOTA - Office of Technology Assessment

- Operational Transconductance AmplifierOTDR Optical Time Domain ReflectometerOTI Open Technology InterfaceOTN Optical Transport NetworkOTP One-Time Programmable (z. B. PROM)OTPS One-Time Pad Simulation (encryption standard)OTS Orbit-Test-SatellitOTSS Open System Transport and Session Support (IBM)ÖVE Österreichischer Verband für ElektrotechnikOVID Object Oriented View of DistributionOVIDE Organisation du Videotex pour les Deputes EuropéensOVSt OrtsvermittlungsstelleOWP Ordnungs- und Wettbewerbspolitik (DTAG)OXC Optical Cross Connect

PP2P - Point-to-Point

- Peer-to-PeerP3P Platform for Privacy PreferencePA Pre-arbitratedPABX Private Automatic Branch ExchangePAC - Programmable Analog Circuit

- Programme Advisory Comittee (ETSI)PAD - Packet Assembly/Disassembly Facility

- Piezo Aperture DisplacementPAL - Programmable Array Logic

- Phase Alternation Line (Farbfernsehnorm)PALC Plasma-adressierbares LC-DisplayPanaftel Pan-African Telecommunication NetworkPANS Pretty Amazing New Stuff (scherzhaft: POTS and PANS)PAS Publicly Available Specification (ISO/IEC JTC1)PASS Parallel Activity Specification SchemePBT Position Bonding TerminalPBX Private Branch ExchangePCA Processable Content ArchitecturePCB Printed-circuit BoardPCC - Protocol Communication Controller

- Preset Conference Calling- Page Counter Control

PCELP Predictive Code-Excited Linear PredictionPCI - Protocol Control Information

- Programmable Communications Interface- Peripheral Component Interconnect

PCM - Puls Code Modulation- Plug Compatible Manufacturer (IBM-Kompatible)

PCMCIA Personal Computer Memory Card International Assocation

- 54 -

PCME Packet Circuit Multiplexing EquipmentPCN Personal Communications NetworkPCO Point of Control and ObservationPCON Power Control ModulePCP Primary Cross-connect PointPCR Peak Cell Rate (ATM)PCS - Personal Communications System (US-Mobilfunksystem)

- Personal Communications Service- Plesiochronous Connection Supervision

PCS-MD PCS-Mediation DevicePDA - Processable Document Architecture

- Personal Digital AssistantPDAD Proposed DAD = Proposed Draft Addendum (ISO/IEC)PDAM Proposed DAM = Proposed Draft Amendment (ISO/IEC)PDC Personal Digital CellularPDES Product Data Exchange SpecificationPDF Portable Document Format (Acrobat .pdf-Dateien)PDH Plesiochrone Digitale Hierarchie; Plesiochronous Digital HierarchyPDISP Proposed Draft International Standardized ProfilePDM Produktion für Datenkommunikation und MehrwertleistungenPDMB Project Development Management BoardPDN Public Data NetworkPDP Plasma Display PanelPDU Protocol Data UnitPE - Presentation Element

- Provider Edge- Public Enquiry- Polyethylen

PEARL Process and Experiment Automation Realtime LanguagePEF Power Entrance FacilityPEGE Pentair Enclosures Group EuropePEL Photographic ElementPEM Protocol Element ManagerPERBES-V Personalbewirtschaftungssystem für die VertreterpostenberechnungPET Personal Electronic Transactor (Commodore)PETRUS Protokoll-Entwicklungs-Test-Rechner-Universal-SystemP/F bit poll/final bitPFA Printer Font ASCIIPFB Printer Font BinaryPFC Power Factor Correction (cos ϕ-Korrektur)PFM Printer Font MetricsPFR Portable Font Resource (Datei-Typ, .pfr)PFS Page Format Selection (Ttx)PG Produktgenerierung (DTAG)PGA - Professional Graphics Adapter

- Programmable-Gain AmplifierPGC Professional Graphics CardPGML Precision Graphics Markup LanguagePGP - Pretty Good Privacy (Verschlüsselungscode)

- Principal Ground PointPh Physical (Layer)PH Packet HandlerPHIGS Programmer's Hierarchical Interactive Graphics SystemPhoton Pan-European photonic transport overlay network (EU/ACTS)

- 55 -

PHP Professional Home PagesPHS Personal Handy Phone SystemPHY - Physical (layer)

- Token Ring Physical ProtocolPiA Personal für internationale Aufgaben (DTAG)PICS Protocol Implementation Conformance StatementPICTEL Projekt- und Investitionscontrolling der Telekom (DTAG)PID Path Identification (T1-System)PIN Personal Identification Number/persönliche IdentifikationsnummerPISA Portable Informations-System-ArchitekturPISN Private Integrated Services NetworkPISO Parallel in Serial OutPIV Prozess- und IV-LösungenPIXIT Protocol Implementation Extra Information for TestingPKD Public Key DirectoryPKI - Philips Kommunikations Industrie AG (⇒ Lucent Technologies ⇒ PMNS)

- Public-Key InfrastructurePKS Public Key ServicePKT Planungskonzept TelekomPKV PrivatkundenvertriebPLAAKI Platzansteuerungstechnik Auskunft InlandPLANET Planung Netze (DTAG)PLC - Planar Lightwave Circuit

- Programmable Logic ControllerPLCP Physical Layer Convergence ProcedurePLD - Page Line Down (Ttx)

- Programmable Logic DevicePLL Phase locked loopPLMN Public Land Mobile NetworkPLP Packet Level ProtocolPLU Partial Line Up (Ttx)PMAE Performance Management Application EntityPMB Power Monitor and Battery ModulePM-BM Packet Memory Bus to Module Interconnect Interface (MII)PMD Physical Medium DependentPM - Port Monitoring

- Personalmanagement (DTAG)-Performance Management

PMAN Private Metropolitain Area NetworkPMC Project Management and Committee Support (ETSI)PMD - Token Ring, ATM: Physical Medium Dependent

- PolarisationsmodendispersionPMI Privilege Management InfrastructurePM-MB Packet Memory Module Interconnect Interface (MII) to BusPMNS Philips Multimedia Network Systems GmbH ⇒ Professional Multimedia Network

Systems GmbH, BautzenPMP - Punkt-zu-Mehrpunkt

- Point-to-MultipointPMS - Projekt-Management-Service (DTAG)

- Personal Medical SystemPMXA Primärmultiplex-AnschlussPNA Phoneline Networking AlliancePNE Presentation des Normes Européennes (ETSI)

- 56 -

PNG Portable Network GraphicPNIC Private Network Identification CodePNNI Private Network-to-Network InterfacePNP Privater NummernplanPOCSAG Post Office Code Standardisation Advisory GroupPOINT Portierung im Netz der Telekom (DTAG)PolMUX PolarisationsmultiplexPON Passives optisches Netz / Passive Optical NetworkPOP Point of Presence (Übergabepunkt)POP-3 Post Office Protocol – Version 3POS Point of SalePOSI Promoting Conference for OSIPOSIP Packet over SONET Interface ProcessorPOTS Plain Old Telephone ServicePP - Personalisierungsprozessor

- Packet ProcessorPPAU Packet Processing Access Unitppb Parts Per Billion (Milliarde!)PPI Plesiochronous Digital Hierarchy (PDH) Physical Interfaceppm parts per millionPPP Point-to-Point ProtocolPPS - Produktionsplanungs- und -steuerungssysteme

- Data Presentation ServicePPTP Point-to-Point Tunneling ProtocolPQ - Primary Questionnaire (Europäische Normung)

- Priority QueuingPQD Packet Queuing and DequeuingPR - Page Request

- Public RelationsPRA - Primary Rate Access

- Produktaudit (DTAG)PRBS - Pseudo Random Binary Sequence

- Pseudo Random Bit SequencePRC Primary Reference ClockPRCS Personal Radio Communication SystemprENV projet Europäischer Normen-Vorschlag

(Draft Proposed European Standard)prHD proposed Harmonization DocumentPRHD Preliminary Harmonization DocumentPRI Primary Rate InterfacePRIMA Produkt- und Innovationsmanagement (DTAG)PRM Premium RatePRMD Private Management Domain (MHS) (Privater Versorgungsbereich)PRODAS Produktdatenserver (DTAG)ProdM Produktmanager (DTAG)PROFS Professional Office SystemPROLOG Programming in LogicPROM Programmable ROMPROMAN Projektdatenbank Auftragsmanagement (DTAG)PROMPT Prozessunterstützung zur Maßnahmen- und Projektabwicklung Technik Netze

(DTAG)PRS Primary Reference SourcePRT-ID Protocol Identifier

- 57 -

PS - Packet Switching- Paging Systems (ETSI Committee)

PS - Peripheral ShelfPSAP Presentation Service Access PointPSAU Packet Switched Access UnitPSDN Public Switched Data NetworkPSDS Public Switched Data ServicesPSK Phase shift keying = PhasenumtastungPSN Private Switching NetworksPSQM Perceptual Speech Quality Measure (ITU-T P.861)PSPDN Packet Switched Public Data NetworkPSTN Public Switched Telephone NetworkPSU Power Supply UnitPSY Personalwirtschaftliche Systeme (DTAG)PT Project Team (ETSI)PTC - Positive Temperature Coefficient

- Polska Telefonia Cyfrowa- Permission to Connect

PTP Point-to-PointPTT Post, Telegraph & TelephonePTZ Posttechnisches Zentralamt !PUK Personal Unblocking Key (persönlicher Entsperrcode)PUM Private User MobilityPUMA-T Prüfen und Messen automatisch – Telekom (DTAG)PUT Protocol under TestPVC - Permanent Virtual Connection

- Permanent Virtual Circuit- Polyvinylchlorid

PVR Personal Video RecorderPWM Pulse-width modulation

QQ.SIG (Variante von ITU-T Q.931 für die Signalisierung zwischen Nebenstellenanlagen)Q3 QPSX Layer3QA Queued ArbitratedQAM Quadrature Amplitude ModulationQA-SAC Queued Arbitrated Slot Access ControlQ-bit Qualifier bitQCIF Quarter Common Intermediate Format (144 x 176 Pixel bei 30 Bildern/s)Q-DCN, QDCN Q-Data Communication Network (Q = systemabhängige Management-Schnittstelle

nach ETS 300 376-1 und ETS 300 377-1 (Q3-Schnittstelle))QFP Quad Flat-PackQLG Query Language GroupQM Qualitätsmanagement (DTAG)QMH Qualitätsmanagement-Handbuch (DTAG)QMS Qualitätsmanagement-System (DTAG)QMV Qualitätsmanagement-Verfahrensanweisung (DTAG)QNM Qualitäts- und Netz-ManagementQOS, QoS Quality of ServiceQPPB QoS Policy Propagation by BGPQPR Qualitätsprüfung (DTAG)QPSK Quadrature Phase Shift Keying

- 58 -

QPSX Queued Packet Synchronous ExchangeQS Qualifizierte SoftwareQSPI Queued Serial Processor InterfaceQÜW Qualitätsüberwachung (DTAG)QVT Qualitätsverbesserungsteam (DTAG)QZF Quasi-Zufallsfolge

RRA Recognition Arrangements (in Verbindung mit ECITC)

Radio-Communications Agency (UK)RACE Research and Development in Advanced Communications in EuropeRACF Resource Access Control Facility (IBM-Produkt)RACH Random Access Channel (LAN, GSM, DCS)RADAR Radio Detecting and RangingRADIUS Remote Authentication Dial-in User ServiceRADSL Rate-adaptive Asymmetric Digital Subscriber LineRAI Remote Alarm IndicationRAL Deutsches Institut für Gütesicherung und Kennzeichnung e.V.RAM Random-Access-MemoryRARE Réseaux Associés pour la Recherche EuropéenneRARP Reverse Address Resolution ProtocolRAS - Remote Access Service

- Remote Access Server- Row Access Strobe (DRAM)

Rascom Regional African Satellite Communications SystemRATES Remote Access and Test EquipmentRBOC Regional Bell Operating CompanyRBS Radio Base StationRC4 Rivest Cipher, Version 4RC5 Rivest Cipher, Version 5RCB Ring Coupler and BypassRCCL Return Channels for Cable and LMDSRCIC Regulatory Compliance Information CenterRCL Ring Control LogicRCS Remote Controlled Switching SystemRCTL Resistor-Capacitor-Transistor-LogicR-DLU Remote Digital Line UnitRD - Referenzdokument

- Request DisconnectRDA Remote Database AccessRDC - Remote Device Control

- Remote Data CenterRDI - Remote Defect Indication

- Remote Data Exchange InterfaceRDL Rules Definition LanguageRDNV RufdatennachverarbeitungRDS - Radio Data System

- Running Digital SumRDS-Forum Radio Data System ForumREBELL Rechnergestützte Betriebslenkung leitergebundener ÜbertragungsanlagenRED Random Early DetectionREFA Verband für Arbeitsstudien und Betriebsorganisation e.V.RegTP Regulierungsbehörde für Telekommunikation und Post

- 59 -

REI Remote Error IndicationREJ RejectREN Ringer Equivalence Number (US-Telefonnetz)REO Rechnung Online (DTAG)REPROV Rechnergestütze Programmbearbeitung in der VermittlungstechnikREQ request (primitive)RES Radio Equipment and Systems (ETSI Committee)REUNIR Réseau des Universités et de la Recherche

(Network of universities and research)REV-D Reverse Charging during the callREV-S Reverse Charging at call set-up timeREV-U Reverse Charging unconditionalRF Radio FrequencyRFC Request for Comments (Internet-Standards)RFI - Radio Frequency Investigation Ltd (UK test lab)

- Request for Information (Produktabfrage bei einem Hersteller)RFID Radio Frequency IdentificationRFP Request for Proposal (Angebotsabfrage bei einem Hersteller)RFQ Request For QuotationRFS Ready for ServiceRHE Regional Head EndRHIN Réseau Hétérogène Informatique NormaliséeRfÜ RundfunkübertragungRGB Rot Grün BlauRIA Robotic Industries Association (USA)RIM Request InitializationRIO Reference Information Object (ISO 9040)RIP - Raster Image Processor

- Raster Image Processing- Routing Information Protocol

RIPE Réseaux IP EuropéennesRIPE-NCC Réseaux IP Européennes Network Coordination CentreRIPv2 Routing Information Protocol version 2RISC Reduced Instruction Set ComputerRITA Réseau Integré de Transmissions AutomatiquesRJE Remote Job EntryRJ TPDU Reject Transport Protocol Data UnitRKW Rationalisierungs-Kuratorium der Deutschen WirtschaftRLDRAM Reduced Latency Dynamic Random Access MemoryRLF Reverse Line Feed (Ttx, Schicht 6)RM - Resources Manager

- Resource Management (ATM)- Reference Model

R-MBS Rechnungslegung Militärkunden und Behörden mit Sicherheitsaufgaben (DTAG)RME Relay Management EntityRMON Remote MonitoringRMP Resource Management ProtocolRMT Real-Time Multicast TransportRNIS Réseau Numérique à Integration des Services (= ISDN)RNR Receive Not ReadyRNT Radio Network TerminationRO, ROS Remote Operations (MHS)ROA - Request of Acknowledgement

- Recognized Operating Agency

- 60 -

RODE Remote Open Document EditingROI Return on InvestmentROLAND Realisierung offener Kommunikationssysteme auf der Grundlage anerkannter

europäischer Normen und der Durchführung harmonisierter TestverfahrenROLR Receive Objective Loudness RatingROM Read-Only MemoryROPM Remote Operations Protocol MachineROSA RACE Open Services Architectures (RACE R1017)ROSE - Remote Operations Service Element

- (= EIES) Research Open System for EuropeRP-AS Ringing Pulse-Alerting SignalRPC Remote Procedure CallsRPDCP Réseau public pour données à commutation par paquets

= PSPDNRPF Remote Power FeedingRPM Resource Pool ManagerRPMS Resource Pool Management ServerRPOA Recognized Private Operating AgencyRPS Repetitive Pattern SuppressionRQ Request CounterRQM Request Queue MachineRR Receive Ready (HDLC)RRR Routing for Resource ReservationRs Ressort (der DTAG)RS - Record Separator (ASCII-Zeichen Nr. 1Eh)

- Recognized Standard (jetzt meist: EIA/TIA...)RSA Rivest, Shamir, Adelman (Public-Key-Algorithmus)RSC Remote Service CallRSCA Recreational Software Advisory CounsilRSCS Remote Spooling and Control SystemRSET ResetRSN Regionaler Service NetzeRSO Recognized Standardization OrganizationRSOH Regenerator Section OverheadRsp response (primitive)RSRE Royal Signal and Radar EstablishmentRST Relaisstellen-ModusRSVP Resource Reservation ProtocolRTAU Router Access UnitRT, RTS Reliable Transfer (MHS)RTC - Real Time Control

- Real Time ClockRTCP Real-Time Control ProtocolRTF Rich Text FormatRTOS Real-Time Operating SystemRTP - Real Time Transport Protocol

- Real-Time ProtocolRTR - Router

- Response-Time ReporterRTS - Request To Send (V.24 Ltg. 105/S2)

- Register Transfer LevelRTSE Reliable Transfer Service ElementRTSP Real-Time Streaming Protocol

- 61 -

RTT Regie des Télégraphes et des Téléphones (Fernmeldebehörde Belgiens, jetztBelgacom)

RV RechnerverbundRWTH Rheinisch-Westfälische Technische Hochschule

SS... Session ...S1IU Switched Multimegabit Data Service (SMDS) DS1 Interface UnitSA Service AssuranceSAA - Service Assurance Agent

- Systems Application Architecture (IBM)SABCA Societé Anonyme Belge de Constructions Aéronautiques, BrüsselSABM - Set Asynchronous Balanced Mode (HDLC)

- Start Asynchronous Balanced ModeSABME Set Asynchronous Balanced Mode Extended (HDLC)SACF Single Association Control FunctionSADT Structured Analysis and Design TechniqueSAN - Storage Area Network

- Subscriber Access NetworkSANE Scanner Access Now EasySANs Storage Area NetworksSAO Single Association ObjectSAP - Service Access Point

- Session Announcement ProtocolSAPI Service Access Point IdentifierSAR Segmentation and ReassemblySARM Set Asynchronous Response Mode (HDLC)SARME Set Asynchronous Response Mode Extended (HDLC)SASE - Specific Application Service Elements

- Stand Alone Synchronization EquipmentSatFu SatellitenfunkSatKon Satellitenfunk-KontrollzentrumSATNET Atlantic Ocean Packet Satellite Communications NetworkSatFuGl Satellitenfunk-GrundleitungSatFuSyst SatellitenfunksystemSAVD Simultaneous or Alternate Voice and DataSAVE - Projektgruppe für Akquisition und Beratung von

Kunden bei Satellitenverteildiensten- Siemens-Informationstechnik Anwenderverein e. V.

SAX Simple Application-Programming Interface (API) for Extensible Markup Language(XML)

SBS - Satellite Business Services- Siemens Business Services

SC - Sub-Committee- Stuffing Control- Synchronization Control

SCART Syndicat des Constructeurs d'appareilles radio récepteurs et téléviseursSCB Serial Communication BusSCC - Standards Council of Canada

- Serial Communications ChannelSCe Support Center (DTAG)

- 62 -

SCF - Selective Call Forwarding- Subsystem Control Facility (Tandem)

SCM - Single Carrier Modulation- Supply Chain Management

SCN Switched Circuit NetworkSCOBOL Screen Common Business Oriented Language (COBOL)SCP Service Control PointSCPC -Single Channel per CarrierSCR - Static Conformance Requirements

- Sustainable Cell Rate (ATM)SCS - Scientific Control Systems

- System Conformance StatementSCTP Simple Control Transmission ProtocolSCZ Service- und Computer-Zentrum (DTAG)SD - Standing Document (ISO)

- Signal Degraded (Signal beeinträchtigt)SDE - Submission and Delivery Entity (MHS)

- Switched Multimegabit Data Service (SMDS) DS1 EdgeSDH Synchrone Digitale Hierarchie; Synchronous Digital HierarchySDL - Specification Description Language (FDT)

- Systems Designers LimitedSDLC Synchronous Data Link Control (IBM, Schicht 2)SDNS Secure Data Network SystemsSDP Session Description ProtocolSDO Standards Development OrganizationSDP Source Destination PairSDR - Special Design Request

- Session Detail Record (Cisco)SDSL Symmetrical Single Pair High bit rate Digital Subscriber Line

(ETSI TS 101 524-1 und -2), vergl. SHDSLSDT Structured Data TransferSDU Service Data UnitSDV Servicedienstvertrag (DTAG)SE - Service Element

- Support Engineer- Sales Engineer

SEAMCAT Spectrum Engineering Advanced Monte Carlo Analysis ToolSEARCC South East Asia Regional Computer ConferenceSEB Single-End BillingSEC SDH Equipment ClockSEDOS Software Environment for the Design of Open Distributed SystemsSEE SicherheitsendeinrichtungSEG - Security Expert Group

- SMDS Edge GatewaySEL Standard Elektrik Lorenz AG ⇒ Alcatel SELSELV Safety extra-low voltageSEMI Semiconductors Equipment and Material InternationalSeN Service Netze (DTAG)SeN-CD Service Netze - Circuit Design ⇒ CCDSeN-FMC Service Netze - Fault Management Center ⇒ QNMSEO Single-End OrderingSEPT - Systemunabhängige externe Prüftechnik (DTAG)

- 63 -

- Service d'Etudes Communes des Postes et TélécommunicationsSES - Severely Errored Seconds (stark fehlerbehaftete Sekunden)

- Satellite and Earth StationsSET Secure Electronic TransactionSETS Station Equipment Timing SynchronizationSETSS Software Engineering for TelecommunicationSET Secure Electronic TransactionSEU Sende-/Empfangs-UmsetzerSEV Schweizerischer Elektrotechnischer VereinSF - Single Frequency

- Superframe FormatSFB Schiedsstelle für BeeinflussungsfragenSFD Simple Formattable Document TypeSFDM Service Fault Domain ManagerSFT System Fault ToleranceSFV StandardfestverbindungSFV2MU Standardfestverbindung 2,048 Mbit/s, unstrukturiertSG Study Group (ITU)SGCP Simple Gateway Control ProtocolSGML Standard Generalized Mark-up LanguageSG-FS Special Group on Functional StandardizationSGI Silicon Graphics, Inc.SGR Select Graphic RenditionSH - Stationärer Handel (DTAG)

- Segment HeaderSHAPE Supreme Headquarters Allied Powers Europe (NATO)SHDSL Single-Pair High-bit-rate Digital Subscriber Line (ITU-T G.991.2), vergl. SDSLSHF Super-high Frequency (3-30 GHz)SHS Select Horizontal SpacingSI - Shift In (ASCII-Zeichen Nr. 0Fh)

- Schweizer Informatiker Gesellschaft- Signal-Integrität

SIA Società Italiana AvionicaSiC SiliziumkarbidSID Service IdentificationSIDOS Single-Image Distributed Operating SystemSIF - System InterfaceSIG - Special Interest Group

- Signalling (Arbeitsgruppe der SPS)- Switched Multimegabit Data Service (SMDS) Interest Group

SIKOM Sicherheits-Kommunikation (DTAG)SIM - Subscriber Identification Module (ETSI GSM)

- Set Initialization Mode (HDLC)- Subscriber Network Interface Module

SIMEG SIM Expert GroupSIMPS Satellite Interface Message ProcessorSIMULA Simulation LanguageSiN Schalten im Netz (DTAG)Sing-Tel Singapore TelecommunicationsSINPO Signal Strength Interference Noise Propagation Overall RatingSIO Scientific and Industrial OrganizationSIP - Subscriber Interface Protocol (basiert auf DQDB)

- Session Initiation Protocol

- 64 -

SIPO Serial In, Parallel OutSIR Sustained Information RateSIS Standardisering i Sverige (Swedish Institute of Standardization)SISA Supervisory and Information for local and remote AreasSIT Special Information Tone (PSTN)SITA Société Internationale des Télécommunications AéronautiquesSIU Serial communication bus Interface UnitSK Slovenské TelekomunikácieSKB Seekabelbetrieb (DTAG)SKE - Satelliten-Kommunikations-Empfangseinrichtung

- SeekabelendstelleSL Segment LengthSLA - Synchrone Leitungsausrüstung

- Service Level AgreementSLE Single Layer EnvironmentSLIC Subscriber Line Interface CircuitSLIO Serial-Link Input/OutputSLIM Struktur- und Prozessanalyse in den Betrieben zur Identifikation markterforderlicher

Kostenreduzierung (DTAG)SLIP - Serial Line Internet Protocol

- Serial Line Interface ProtocolSLM System Loud ProtocolSLP - Single data link protocol functions

- Single Link ProcedureSLT Subscriber Line TerminalSLX Synchroner LeitungsmultiplexerSM - Session Manager

- Security Module- System Manager

SMA Surface Mounted AssemblyS-MAC Source Medium Access Control (MAC) AddressSMAE Systems Management Application EntityS-MAN-SAP Source Medium Access Control (MAC) Service Access PointSMASE Systems Management Application Service ElementSMB Small-medium BusinessSMBus System Management BusSMD Surface Mounted Device (dt. Oberflächenmontage, OFM)SMDS Switched Multimegabit Data ServiceSMDSU Switched Multimegabit Data Service UnitSME Small and Medium EnterprisesSMF - Systems Management Function

- Sub-multiframe (ITU-T G.704)SMFA Specific Management Functional AreaSMI Structure of Management InformationSMIB Security Management Information BaseSMILE Service Montage Information und Lenkung (DTAG)SMP - Symmetrical Multiprocessing

- System Management ProtocolSMPDU Service Message Protocol Data Unit (MHS)SMS - Systèmes multi-services par satellite

(Satellite Multi Services)- Short Message Service (GSM)- Systems Management Service

- 65 -

SMT - Synchronous Multiplex Terminal- Surface-mounting Technology- FDDI Station Management

SMTP Simple Mail Transfer ProtocolSN - Subnetwork

- Subnetwork NumberSNA, S-NA - Source Node Address

- System Network ArchitectureSNAcP Subnetwork Access ProtocolSNARE Subnetwork Address Resolution EntitySNC Smart Network CameraSNCR Subnetwork Connection ReferenceSNDCF Subnetwork Dependent Convergence FunctionSNDCP Subnetwork Dependent Convergence ProtocolSNDCP Subnetwork Independent Convergence ProtocolSNG-TES Transportable Earth Stations for purposes of Satellite News GatheringSNI - SNA Network Interconnection (IBM)

- Siemens Nixdorf Informationssysteme AG !- Serviceschnittstelle (DTAG)- Subscriber Network Interface- Service Node Interface

SNICP Subnetwork Independent Convergence ProtocolSNMP Simple Network Management ProtocolSNPA Sub-Network Point of AttachmentSNPDU Subnetwork Protocol Data UnitSNR Signal-to-Noise RatioSNRM Set Normal Response Mode (HDLC)SNRME Set Normal Response Mode Extended (HDLC)SNS Space Network SystemsSNSDU Subnetwork Service Data UnitSO - Shift Out (ASCII-Zeichen Nr. 0E)

- Segment OffsetSOAP Simple Object Access ProtocolSOC Service Operation Center (DTAG)SoC System on ChipSOF Specification of FunctionsSOGITS Senior Official Group Information Technologies StandardizationSOGT Senior Official Group for TelecommunicationsSOH Start of Header (ASCII-Zeichen Nr. 01h)SOHO Small-Office, Home-OfficeSONET Synchronous Optical NetworkSOS Silicon on saphireSP - Space (ASCII-Zeichen Nr. 20h)

- Segmentation Permitted Flag- Small Point of Presence (PoP)- Service Provider

SPAG - Standards Promotion and Application Group,- Groupe de Promotion des Normes et des Application

SPARC - Standards Planning and Requirements Committee- Scaleable Processor Architecture

SPC Stored Program ControlSPD Surge Protective DeviceSPDM Service Performance Domain Manager

- 66 -

SPDU Session Protocol Data UnitSPE Synchronous Payload EnvelopeSPECS Specification and Programming Environment for Communications Software (RACE

R1046)SPID Service Profile Identifier (ISDN)SPN Subscriber Premises NetworkSPNE Signal Processing Network Equipment (DCME, PCME, EC...)SPNP Support of Private Numbering PlansSPREIN Sprach-EingabeSPRM Supplementary Performance Report Message (T1-System)SPS - Speicherprogrammierbare Steuerung

- Signalling, Protocols and Switching (ETSI Committee)SPuR Server Personal und Recht (DTAG)SQCIF Sub-Quarter Common Intermediate FormatSQL Structured Query LanguageSR - Stuffing Reset

- Synchronisation ResetSRC - Strategic Review Committee (ETSI)

- SourceSRC-REF Source ReferenceSRD Short-Range DeviceSREJ Selective RejectSRP Spatial Reuse ProtocolSRTS Synchronous Residual Time StampSS Single ShelfSS7 Signalling System 7SSA Specification and Approval Secretariate (CEPT)SSAP Session Service Access PointSSDN Special Services Digital NetworkSSDSL Synchronized Symmetrical Digital Subscriber LineSSDU Session Service Data UnitSSE-CMM Systems Security Engineering Capability Maturity ModelSSG ZN Standardisierungsstrategie-Gruppe Zugangsnetz (DTAG)SSI - Small Scale Integration

- Server-Side IncludesSSIS Solid State Image SensorSSL Secure Socket LayerSSM - Synchronization Status Message

- Source-Specific Multicast (Internet Protocol)- Single Segment Message

S-SN Source Subnetwork NumberSSN Source Subnetwork NumberSSOG Satellite System Operation GuideSSP Service Switching PointSS-SD Simple Dialog Supplementary ServiceSSU Synchronization Supply UnitST Slovenske TelekomunikacieSt.A.A. Standards Application AreaSTC - SHAPE Technical Centre

- Sub Technical Committee (ETSI)STE Security Terminal EquipmentSTEP Standard for Exchange of Product Definition Data ModelsStFrE Steuerfrequenzeinrichtung

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STI Swedish Telecom InternationalSTM - Synchronous Transfer Mode

- Synchronous Transport ModuleSTM-N Synchrones Transportmodul (N = 1, 4, 16 ...)STN Scientific and Technical Information NetworkStöBe-N Störungsbearbeitung Netze (DTAG)STP - Signalling Transfer Point

- Shielded Twisted PairSTS Synchronous Transport SignalSTX Start of Text (ASCII-Zeichen Nr. 02h)SUB - Substitute (ASCII-Zeichen Nr. 1Ah)

- Sub-AddressingS-UMTS Satellite Universal Mobile Telecommunications SystemSUT System Under TestSVC - Switched Virtual Connection

- Switched Virtual Circuit (ATM)SVD Simultaneous voice and dataSVS Select Vertical SpacintSW SoftwareSWFC Sliding Window Flow Control (CCITT X.75)SWG Special Working Group (ISO)SWG-P SWG on ProceduresSWG-RA SWG on Registration AuthoritiesSWG-SP SWG on Stragetic PlanningSWIFT Society for Worldwide Interbank Financial TelecommunicationSWITCH Swiss Telecommunications for Higher Educations and Researchsx SimplexSYN Synchronous Idle (ASCII-Zeichen Nr. 16h)SYNC Synchronisation ModuleSYNTRAN SYNchronous TRANsmission format at the DS3 rateSYSGEN System GenerationSYSMOSY Systematisches Qualitätsmonitoring-System (DTAG)

TT... Transport ...T1 US 1.544-Mbit/s-PCM-SystemT3 US 44.736-Mbit/s-PCM-SystemTA - Terminal Adapter

- Technical Assembly (ETSI)- Technical Advisory

TAB TINA Architecture BoardTACACS+ Terminal Access Controller Assess Control System (Cisco)TACL Tandem Advanced Command LanguageTACS Total Access Communications System (Britisches Funktelefonsystem)TAE - Telekommunikations-Anschlusseinheit

- Trans-Asia-Europe Optical Fibre Cable SystemTAG Technical Advisory GroupTAL - Transaction Application Language (Tandem)

- Teilnehmeranschlussleitung (DTAG)TAN - Transaktionsnummer

- Telematik-Anwendungen

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TAP Tachyon Access PointTAPAC Terminal Attachment Program Advisory CommitteeTAPI Telephony Application Programmers’ InterfaceTAS Terminal Alerting SignalTASC Telecommunications Applications of Switches and Computers (ECMA)TASI Time Assignment Speech InterpolationTAT Theoretical Arrival Time (ATM)TAXI Transmit Ad Receive InterfaceTAXICO TAXI-CommandTAZ Telekommunikations-Administrations-ZentrumTB Technische BeschreibungTBA Telekom Business Academy (DTAG)TBB Transnational Broadband BackboneTBC Token-Bus-ControllerTB/CA ISO Technical Board/IEC Committee of ActionTBETSI Technischer Beirat für Normungsfragen des ETSITBD - Technischer Betrieb für Datenübermittlung

- To Be DeterminedTBINK Technischer Beirat für Nationale und Internationale KoordinierungTBN Telekom Broadcast NetworkTBR Technical Basis for RegulationTBTA Technical Barriers to Trade AgreementTBX TELEBOXTC - Technical Committee (ISO, ETSI)

- Transport Connection- Transaction Capabilities- Transmission Convergence (sublayer, ATM)

TC-1 Telecom-SatellitensystemTCAP Transactional Capabilities Application PartTCC Technical Coordination Committee (jetzt: ITAEG)TCD Technical Cooperation DepartmentTCM Time Compression MultiplexTCM-ISDN Time Compression Multiplexed ISDN (ITU-T G.961, Appendix III)TCOS TeleSec Chipcard Operating SystemTCP - Transmission Control Protocol

- Terminal Control ProgrammTC-PAM Trans-Code Pulse Amplitude ModulationTCP/IP Transmission Control Protocol/Internet ProtocolTCP/UDP TCP-User Datagram ProtocolTCT Technical Committee for TelecommunicationsTCU - Terminal Control Unit

- Time Control UnitTCXO Temperature Compensated Crystal OscillatorT-DAB Terrestrial Digital Audio BroadcastTDB Telecommunications Development BureauTDCC Time Division Cross Connect SystemTD-CDMA Time Division-Code Division Multiple AccessTDD Time-Division DuplexTDF Time Differential FactorTDI Trade Data InterchangeTDM - Time Division Multiplex

- Tests, Diagnostic and MaintenanceTDMA Time-Division-Multiple-Access

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TDMA/DSI Time-Division Multiple Access/Digital Speech InterpolationTDR Time Domain ReflectometryTDS TelegrammdienstsystemTDSV Telekommunikations-DatenschutzverordnungTE - Terminal Equipment

- Terminal Equipment (ETSI Committee)TE-ACK Terminal Equipment-Acknowledgement SignalTEC - Tokyo Electric Co.

- Technical Engineering Center (DTAG)- Thermoelectric Cooler

TEDE Teledialog-EinrichtungTEDIS Trade EDI SystemsTEI Terminal Endpoint Identifier (Euro-ISDN)TELEDOC Service for electronic document exchange der ITUTeleSec Telecommunications SecurityTEMPEST Temporary emanation and spurious transmissionTEP Technikeinführungsprozess (DTAG)TETRA Trans-European Trunked RadioTEMEX Telemetrie Exchange !TF Technical ForumTFG Test Frame Generator ModuleTFI Terminal Facility IdentifierTFT Thin film transistor (Technologie für Flachbildschirme)TFTP Trivial File Transfer ProtocolTGN Telekom Global NetworkTH Trunk HuntingTHZ TEMEX-Hauptzentrale !TIA Telecommunications Industries Association (USA)TIBS Transformation in beliebige Systeme (Verfahren zur Koordinaten- und

Datumstransformation)

TID Texas Instruments Deutschland GmbHTIES - Telecommunication and Information Exchange between Systems

- Telecom Information Exchange Services (ITU)TIFF Tag Image File FormatTIF0 Text Interchange Format 0 (MHS)TIGIN Transport network equipment for Interconnecting GSTN and IP Networks (ITU-T)TIKS Telekom Internal Key ServiceTIM - Telepoint Identification Module

- Telecom Italia MobileTIMEG TIM Expert GroupTIMES Telekommunikation, Informationstechnologie, Multimedia, Entertainment und

SicherheitsdienstleistungenTINA - Telekom Internet-Nutzer-Administration

- Telecommunications Information Networking ArchitectureTIPHON Telecommunications and Internet Protocol Harmonization Over NetworksTK TEMEX-Konzentratoreinrichtung !TKD Technischer Kundendienst für DatenübermittlungTKG TelekommunikationsgesetzTKO TelekommunikationsordnungTKÜV Telekommunikations-ÜberwachungsverordnungTKV Telekommunikations-Kundenschutz-VerordnungTk Z Technikzentrum (Elmshorn der DTAG) ⇒ Zentraler Service

- 70 -

TL - Technische Lieferbedingungen (⇒ TS, TST)- Transport Layer

TLA Top-Level AggregationTLD Top-Level DomainTln TeilnehmerTLS Transparent LAN ServiceTLV Type, Length, ValueTlx TelexTM - Transmission and Multiplexing (ETSI Committee)

- Timing MarkerTMC Transaction Mode Communication Service and Protocol for OSITMDS Transition Minimized Differential SignallingTMF - Transaction Monitoring Facility (Tandem)

- TeleManagement ForumTMN Telecommunications Management NetworkTMO Thermo-Magneto-OpticalTMP TypmusterprüfungTMSC Telekom Management System for CustomersTMXAE TEMEX-Anschalteeinrichtung !TN-SAVE Technik-Netze-System zur Analyse von Verkehrsmessdaten (DTAG)TNA TEMEX-Netzabschluss !TNC Transit Node ClockTNIC Transit Network Identification CodeTNL Technikniederlassung (DTAG)TNV Telecommunication Network VoltageTO Technical OrganizationTOC - Telephone Operating Company

- Table of ContentsTOCOF Telecom Over Cable Operator ForumTOM - T-Online Messenger

- Typesetting-Output-MicrofilmTOP Technical and Office ProtocolTOS Type of ServiceTP - Transaction Processing

- Transport Protocol- Terminal Portability

TPA - Transient Program Area (CP/M)- Telematic Protocol Architecture

TPDU Transport Protocol Data UnitTPM Technisches Produktmanagement (DTAG)TPNC TP Node ConnectionTPS Three Party ServiceTPSE Transaction Processing Service ElementTPS-TC Transmission Protocol-Specific Transmission ConvergenceTR Technical ReportTRAC Technical Recommendations Applications Committee (ITU-T)TRGW Token Ring/802.5 GatewayTRN Token Ring at 16 Mbit/sTROLI Token Ring Optimised Line InterfaceTS - Transport Service

- Technische Spezifikation (früher: TL)TSAG Telecommunication Standardization Advisory Group (ITU-T)TSAP Transport Service Access PointTSAP-ID Transport Service Access Point Identifier

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TSB Telecommunication Standardization BureauTSC Telefon-Service-Center (Deutsche Bank)TSDN Transfer Syntax Description NotationTSDU Transport Service Data UnitTSID Test Signal Identification (T1-System)TSR Terminate-and-Stay-Resident (PC-Softwareklasse)TSS TEMEX-Schnittstelle !TST Technische Spezifikation Telekom (DTAG)TSW TelesoftwareTT Term-TaskTTC - Telecommunication Technology Council

- Telecommunications Technical Center, La Gaude- Telefax Test Center- Telemetrie, Tracking and Command- Telekom Trust Center (DTAG)

TTCN Tree and Tabular Combined NotationTTCRB Teletex Test Common Reference BaseTTE Telecommunications Terminal EquipmentTTI Trail Trace IdentifierTTL Transistor-Transistor-LogikTTM Time to MarketTTP Transport Termination PointTTTL Transistor-TTLTTU Teletex-Telex-UmsetzerTtx TeletexTTXAU Teletex access unit (MHS)TTY TeletypeTU Tributary UnitTUA Telecommunications Users Group (UK)TUB Technische Universität BerlinTUG Tributary Unit GroupTUM Technische Universität MünchenTUP Telephone User PartTUT Terminal under TestTVB TEMEX-Versorgungsbereich !TVR TaktverstärkerTVS Technischer VertriebssupportTVSt TeilnehmervermittlungsstelleTVU TaktversorgungseinheitTWS two-way simultaneousTx TelexTZ - Technikzentrum

- TEMEX-Zentrale !

U

U Urgent (alarm)UA - User Agent (MHS) (End-Systemteil)

- Unnumbered Acknowledgment (HDLC)UAC - Users Advisory Committee

- Unbalanced Operation Asynchronous Response Mode ClassUACG UMTS Auction Consultative Group (UK)UADSL Universal Asymmetric Digital Subscriber LineUAE User Agent Entity (MHS)

- 72 -

UAL User Agent Layer (MHS)UAP Unified Approval Procedure (ETSI)UAPDU User Agent Protocol Data Unit (MHS)UART Universal Asynchronous Receiver/TransmitterUAWG Universal ADSL Working GroupUBR Unspecified Bit RateUCI User Control InterfaceUCS Universal Character Set (ISO 10646)UCSD University of California, San DiegoUD unit dataUDLC Universal Data Link Control (UNIVAC, Schicht 2)UDMS Universelles Datenmess-SystemUDP User Datagram ProtocolUDSL Universal Asymmetric Digital Subscriber Loop, Universal ADSLUE - User Element

- ÜbertragungseinheitUEB Übertragungseinheit für BasisbandverfahrenUEG Übertragungseinheit mit Leitungssignal nach Empfehlung G.703UEI Übertragungseinheit mit Leitungssignal nach Empfehlung I.430 (S0)UEM Übertragungseinheit für ModemverfahrenUFTG User Facilities Task GroupUHD User Help DeskUHF Ultra-High Frequency (300 MHz-3 GHz)UI - Unnumbered Information

- Unit IntervalUIC Union Internationale des Chemins de FerUIRR Union Internationale Rail RouteUISCN Universal International Shared Cost NumbersUIT Union Internationale des Télécommunications

(= International Telecommunications Union, ITU)UL Underwriters‘ LaboratoriesULA - Upper Layer Architecture

- Uncommitted Logic ArrayULC Underwriters' Laboratories of CanadaULL Unbundling of the Local LoopULSI Ultra-Large-Scale IntegrationUMB Upper Memory Block (PC)UMI User MAN InterfaceUMPDU User Message Protocol Data Unit (MHS)UMPLIS Informations- und Dokumentationssystem UmweltUMTS Universal Mobile Telecommunications SystemUN Use of Network ConnectionUNC Unbalanced Operation Normal Response Mode ClassUNCITRAL United Nations Commission on International Trade LawUNCTAD United Nations Commission on Trade and DevelopmentUNDP United Nations Development Programme (Entwicklungshilfeprogramm der Vereinten

Nationen)UNE Unbundled Network ElementUNESCO United Nations Educational, Scientific and Cultural OrganizationUNI - Kundenschnittstelle (DTAG)

- User-to-Network Interface (ATM)UNICE Union of Industrial and Employer's Confederations of EuropeUNIDO United National Industrial Development OrganisationUNIGS UNIX Interessengemeinschaft SchweizUNII Unlicensed National Information Infrastructure

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UNIXUNMA Unified Network Management ArchitectureUNTDED United Nations Trade Data Elements DirectoryUNTDI United Nations Trade Data InterchangeUN TPDU Use of Network Connection Transport Protocol Data UnitUP Unnumbered PollÜP ÜbergabepunktUPC User Parameter ControlUPED User Premises Equipment DivisionUPS - Uninterruptable Power Supply

- United Parcel ServiceUPT Universal Personal TelecommunicationUPU Universal Postal UnionURL Uniform Resource Locator (Internet)URSI Union Radio-Scientifique InternationaleUS - Unit Separator (ASCII-Zeichen Nr. 1Fh)

- Unavailable Seconds (nicht verfügbare Sekunden)USAM - Universeller Adapter für Modem

- Universal Service Access MultiplexerUSART Universal Synchronous/Asynchronous Receiver/TransmitterUSB - Unterer Sonderkanalbereich

- Upper Side BandUSCC Universal Service Ordering CodeUSiB Unterausschuss für Sicherheitsbegriffe (ISIT)USIM User Service Identity ModuleUSM User-based Security ModelUSRT Universal Synchronous Receiver/TransmitterUSV Unterbrechungsfreie StromversorgungUT3 Utilizadores de Telefones, Telecommunicaçoes e TelematicaUTC - Universal Time Coordinated

- United Technologies CorporationUTM Ultra Thin MultilayerUTP - Universal Trunk Processor (VL-Rechner mit G.703-Schnittstelle)

- Unshielded Twisted PairUTRA Universal UMTS Terrestrial Radio AccessUTUS User-to-User-SignallingUUS User-to-User-SignallingÜw ÜbertragungswegUXGA Ultra-extended Graphics Adapter

VVA Verfahrensanweisung (DTAG)VACM View-based Access Control ModelVAD Voice Activity DetectionVADs Value Added Data ServicesVAMAS Versailles Project on Advanced Materials and StandardsVAN Value Added NetworkVAP Videotex Access PointVAS - Value Added Services (Mehrwertdienste)

- Versandaustauschservice (DTAG)VASP Value Added Service ProviderVATM Verband der Anbieter von Telekommunikations- und MehrwertdienstenVBA Visual Basic for Applications

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VBM Vienna Definition MethodVBN Vorläufer-BreitbandnetzVBR Variable Bit Rate (ATM)VBR-nrt Variable Bit Rate – non real-timeVBR-rt Variable Bit Rate – real timeVC - Virtual Call

- Virtual Circuit- Virtual Channel- Virtual Container- Virtueller Container

VCC - Virtual Card Calling- Virtual Channel Connection (ATM)

VCCI Voluntary Control Council for Interference by Information Technology Equipment(Japan)

VCI - Verband der Chemischen Industrie- Virtual Channel Identifier (ATM)- Virtual Connection Identifier

VCMux Virtual Channel MultiplexerVCSEL Vertical Cavity Surface Emitting LaserVDA Verband der Automobilindustrie e.V.VDE Verband Deutscher ElektrotechnikerVDI - Virtual Device Interface

- Verein Deutscher IngenieureVDM Vienna Development MethodVDMA Verband Deutscher Maschinen- und Anlagenbau e.V.VDPI Verband Deutscher Post-Ingenieure (jetzt: ”Ingenieure für Kommunikation”)VDRZ Verband Deutscher Rechenzentren e.V.VDS Vereinigung Deutscher Softwarehersteller e.V.VdS Verband der Sachversicherer e.V.VDSL Very High Bitrate Digital Subscriber LineVDT Visual Data TerminalVDZ Verband Deutscher Zeitschriftenverleger e.V.VDU Visual Display UnitVE Vermittlungseinrichtung (DTAG)VE:A Vermittlungseinrichtung Ausland (DTAG)VE:F Vermittlungseinheit FernverkehrVE:N Vermittlungseinheit NetzübergängeVE:S Vermittlungseinheit SonderdiensteVE:T Vermittlungseinheit TeilnehmerVERAN Verkehrsregistrier- und Analyse-Einrichtung (DTAG)VER-BES-SAP Vermittlungstechnische Bestandsführung mit SAP R/3 (DTAG)VESA Video Electronics Standards AssociationVF - Voice Frequency (0,3-3 kHz)

- Virtual Filestore (FTAM)VFD Vacuum Fluorescent DisplayVFDB - Verein zur Förderung des deutschen Brandschutzes

- Verband der Funkamateure der Deutschen Bundespost (jetzt: ”Verband derFunkamateure bei Post und Telekom”)

VFsDx Verordnung für den Fernschreib- und den DatexdienstVGA - Video Graphics Array

- Video Graphics AdapterVGNV VerbindungsgebührennachverarbeitungVHE Virtual Home EnvironmentVHF Very High Frequency (30-300 MHz)

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VHLL Very High Level LanguagesVHSIC Very High Speed Integrated CircuitVI Videotex InterworkingVIA Vendors‘ ISDN Association (USA)VIM VertriebsinformationssystemVISYON Variables Intelligentes Synchrones Optisches NetzVkN VerbindungskabelnetzVLF Very Low Frequency (3-30 kHz)VLR Visitor Location Register (GSM)VLSI Very Large Scale IntegrationVLSM Variable Length Subnet Masks (Routing)VM Virtual MachineVME Versa Module EuropeVMS VerkehrsmanagementsystemVNK Vermittelnder NetzknotenVoATM Voice over ATMVOD Video on DemandVoDSL Voice over Digital Subscriber LineVOFDM Vector Orthogonal Frequency Division MultiplexingVoFR Voice over Frame RelayVoIP Voice over Internet ProtocolVoIPoATM Voice over Internet Protocol over ATMVoIPoFR Voice over Internet Protocol over Frame RelayVoP Voice over PacketVORDOK Vorhabensteuerung und –dokumentation (DTAG)V/P Version/Protocol Identifier ExtensionVPDN Virtual Privat Dial NetworkVPI Virtual Path Identifier (ATM)VPI/VCI Virtual Path Indicator/Virtual Channel Indicator (ATM)VPIM Voice Profile for Internet MailVPN Virtual Private NetworkVPNID Virtual Private Network IdentifierVPRT Verband privater Rundfunk- und Telekommunikationsanbieter e. V.VPS Voice Processing SystemVPT Video recorder programming with TeletextVRC Vertical Redundancy CheckVRML Virtual Reality Modelling LanguageVSAM Virtual Storage Access MethodVSAT Very Small Aperture TerminalsVSC Videotex Service CentreVSD Variable Speed DriveVSI - Verband der Softwareindustrie Deutschlands e. V.

- Virtual Switch InterfaceVSP Voice Service ProviderVSt VermittlungsstelleVt Verteiler (DTAG)VT - Virtual Terminal

- Virtual Tributary- Vertical Tabulation (ASCII-Zeichen Nr. 0Bh)

VTB VerteilbaugruppeVTM VerteilmodulVTP Virtual Terminal ProtocolVTS Virtual Terminal ServiceVTV Verband für Textverarbeitung und Bürokommunikation e.V.Vtx Videotex (internationaler Begriff für Btx)

- 76 -

VU-S Verbindungs-Unterstützungs-SystemVWP Voluntary Work ProgrammeVWS Versuchsanstalt für Wasserbau und SchiffsbauVzkN Verzweigerkabelnetz

WW3 World Wide WebW3C World Wide Web ConsortiumWAB Windows Address Book (Microsoft )WAE Wireless Application EnvironmentWAH Wahl bei aufgelegtem HörerWAM Window Access MethodWAN Wide Area NetworkWAP Wireless Application ProtocolWARC World Administrative Radio Conference

(Weltweite Funkverwaltungskonferenz)WASP Wireless Application Service ProviderWATTC World Administrative Telephone and Telegraph ConferenceWCCP Web Cache Communication ProtocolWCDMA, W-CDMA Wideband Code Division Multiple AccessWD Working DocumentWDM - Wavelength Division Multiplexing

- Windows Driver Model (Microsoft )WDP Wireless Datagram ProtocolWE WohneinheitWEFT Web Embedding Fonts Tool (Microsoft )WEP Wired Equivalent PrivacyWFQ Weighted Far QueuingWfW Windows for Workgroups (Microsoft )WG Working GroupWIK Wissenschaftliches Institut für Kommunikationsdienste der DBPWIPO World Intellectual Property OrganizationWIR Wirtschaftlichkeits- und Investitionsrechnung (DTAG)WL Wavelength Line SystemWLAN Wireless Local Area NetworkWLL Wireless Local LoopWLS WDM Long SystemWMO World Meteorological OrganizationWN-ISCC Weltweite Netze International Service Coordination Centre (DTAG)WN-ITC Worldwide Networks – International Transmission Center (DTAG)WN-SKB Worldwide Networks – Seekabelbetrieb (DTAG)WORM Write-Once-Read-Mostly (Optischer Speicher; scherzhaft)WP Working PartyWPT Wideband Packet TechnologyWRC World Radio ConferenceWRED Weighted Random Early DetectionWSI Working Station InterfaceWTL Wireless Transport LayerWTLS Wireless Transport Layer SecurityWTM Work Time Management (DTAG)WTP Wireless Transaction ProtocolWTSA World Telecommunications Standardization AssemblyWTSC World Telecommunications Standardization Conference

- 77 -

WVSt WeitverkehrsvermittlungsstelleWWUCS World Wide Universal Communications StandardsWWW World Wide WebWWWC World Wide Web ConsortiumWYSIWYG What you see is what you get

XxDSL x Digital Subscriber Loop (x = A, H, S, V...) (Sammelbegriff)XHTML Extended Hypertext Markup LanguageXID Exchange Identification (HDLC)XML Extensible Markup Language (Microsoft)XNS Xerox Network SystemXSL Extensible Stylesheet Language

Y

Y2k Year 2000

Z

ZADI Zentralstelle für Agrardokumentation und –informationZB Zentralbereich (DTAG)ZBSB Zeitschriften-Katalog der Bayerischen Staatsbibliothek, MünchenZBTSI Zero Byte Time Slot InterchangeZBU Zentrale Betriebsunterstützung (DTAG)ZCS Zero Code SuppressionZD-A Zeitmultiplex-Datenumsetzereinrichtung Typ AZDB ZeitschriftendatenbankZDD Zentrale Dokumenten-Datenbank (DTAG)ZDE Zentralstelle Dokumentation Elektrotechnik e.V.ZDL Zeitmultiplex-DatenübertragungsleitungZEFU Zentralstelle für Unfallverhütung und Arbeitsmedizin des Hauptverbandes der

gewerblichen BerufsgenossenschaftenZEG Zentrum für Endgeräte (DTAG) !ZENTAUR Zentrales Erfassen, Nachweisen, Tauschen, Anfertigen und Umrüsten von

Gegenständen sowie Regelungen des Werkstattsystems (DTAG)ZfCh Zentralstelle für das Chiffrierwesen !( ⇒ ZSI)ZfE Zentralstelle für Entwicklungen des Post- und Fernmeldewesens, Bonn-

Bad Godesberg !ZfM Zentralstelle für Mobilfunk ! (⇒ T-Mobile)ZfU Zentralstelle für UmweltschutzZGDF Zentrum für grafische DatenverarbeitungZIB Konrad-Zuse-Zentrum für Informationstechnik BerlinZID Zentrum für Internet- und Datennetzplattformen (!, ⇒ ZB NI15, ZB NI16)ZIDN Zentrum Integriertes Datennetz (!, ⇒ ZID)ZIOT Zentrum für Internet- und Online-Transportplattformen (!, ⇒ ZID)ZIP Zentrum für IV-Unterstützung der Prozesse NIZL Zentrum für Logistik (DTAG)ZLT Zentrale LeittechnikZProGP Zentrum für Prozess- und IV-Gestaltung Privat- und Geschäftskunden (DTAG)

- 78 -

ZS Zentraler Service (DTAG)ZSB Zentrale Systembetreuung (DTAG)ZSI Zentralstelle für Sicherheit in der InformationstechnikZSS Zentraler Service SwitchZSSI Zentrum Sales Support International (DTAG)ZTBI Zentrale Testmittelbetreuung für ISDNZVEH Zentralverband der Deutschen ElektrohandwerkeZVEI Zentralverband Elektrotechnik- und Elektronikindustrie e.V.ZVS Zero-Volt SwitchingZVSt Zentralvermittlungsstelle !ZZK Zentraler Zeichengabe-KanalZZZ Zeitzonenzähler !