| # A B C D E F G H I J K L M N O P Q R S T U V W X Y Z |
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| 1G |
First generation |
| 21CN |
21st Century Network (BT) |
| 2G |
Second generation |
| 2.5G |
Enhanced second generation |
| 3D |
Three dimensional |
| 3G |
Third generation |
| 3G LTE |
Third generation Long-Term Evolution |
| 3.5G |
Enhanced third generation |
| 3GPP |
The 3rd Generation Partnership Project |
| 3GPP2 |
The 3rd Generation Partnership Project 2 |
| 4G |
Fourth generation |
| 4GL |
Fourth-generation language |
A |
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| AAA |
Authentication, authorisation and accounting |
| AAC |
Advanced audio coding |
| AAL |
ATM Adaptation Layer |
| AAL5 |
ATM Adaptation Layer type 5 |
| ABR |
Answer/bid ratio |
| ABR |
Available bit rate |
| ABT |
ATM block transfer |
| ACD |
Automatic call distribution |
| ACH |
Automated clearinghouse |
| ACL |
Access control list |
| ACTS |
Advanced Communications Technologies and Services |
| ADC |
Access deficit charge |
| ADC |
Automatic device configuration |
| ADM |
Add-drop multiplexer |
| ADPCM |
Adaptive differential pulse code modulation |
| ADR |
American Depositary Receipt |
| ADS |
American Depositary Share |
| ADSL |
Asymmetrical digital subscriber line |
| ADSL2 |
Asymmetrical digital subscriber line 2 (ITU-T G.992.3 and G.992.4) |
| ADSL2+ |
Asymmetrical digital subscriber line 2+ (ITU-T G.992.5; 25Mbit/s downstream rate) |
| AES |
Advanced Encryption Standard |
| A-GPS |
Assisted Global Positioning System |
| AIM |
Alternative Investment Market (London stock exchange) |
| AIM |
AOL Instant Messaging (proprietary) |
| AIN |
Advanced intelligent network |
| AIP |
Application infrastructure provider |
| AIX |
Advanced Interactive Executive (IBM implementation of UNIX) |
| AIX |
Athens Internet Exchange |
| ALEC |
Alternative local exchange carrier |
| Altnet |
Alternative network operator |
| AMA |
Automatic message accounting |
| AMADNS |
Automated Message Accounting Data Networking System (Bellcore standard for fixed-network CDR collection and interchange) |
| AMATPS |
Automatic Message Accounting Teleprocessing |
| AMESA |
Asia Mobile Electronic Services Alliance |
| AMEX |
American Stock Exchange |
| AMI |
Alternate Mark Inversion (line code) |
| AMIS |
Audio Messaging Interchange Specification (for enhanced messaging systems such as voicemail) |
| AMPS |
Advanced Mobile Phone System (North American analogue mobile communications standard) |
| AMR |
Adaptive multirate (voice coding) |
| AMS-IX |
Amsterdam Internet Exchange |
| ANI |
Automatic number identification |
| ANSI |
American National Standards Institute |
| AOA |
Angle of arrival |
| AOC |
Advice of charge |
| AP |
Access point |
| APAC |
The Asia–Pacific region |
| APDU |
Application Protocol data unit |
| APEC |
Asia-Pacific Economic Co-operation |
| API |
Application programme interface |
| APON |
ATM Passive Optical Network |
| APPN |
Advanced Peer-to-Peer Networking |
| ARDIS |
Advanced Radio Data Information Service |
| ARM |
Advanced RISC Machines |
| ARP |
Address Resolution Protocol |
| ARPHH |
Average revenue per household |
| ARPS |
Average revenue per service |
| ARPU |
Average revenue per user |
| ARQ |
Automatic Repeat Request (an error control method in data transmission) |
| ART |
Autorité de Régulation des Télécommunications (France) |
| ARU |
Audio Response Units |
| ASCII |
American Standard Code for Information Interchange |
| ASI |
Asynchronous serial interface |
| ASIC |
Application-specific integrated circuit |
| ASP |
Application service provider |
| ASPIC |
Application Service Provider Industry Consortium |
| ASPS |
Average spend per site |
| ASPU |
Average spend per user |
| ASR |
Answer:Seizure ratio |
| ASSP |
Application-specific standard products |
| ATA |
Analogue terminal adapter |
| ATM |
Asynchronous transfer mode |
| ATM |
Automatic teller machine |
| ATM25 |
ATM 25Mbit/s interface |
| ATMF |
ATM Forum |
| ATU-C |
ADSL Terminating Unit – Central Office (exchange modem) |
| ATU-R |
ADSL Terminating Unit – Remote (remote modem) |
| AU-1 etc. |
Administrative Units (SDH standard) |
| AUC |
Authentication Centre (GSM term) |
| AUG |
Administrative Unit Group (SDH standard) |
| AVVID |
Architecture for Voice, Video and Integrated Data (Cisco) |
| AWG |
American Wire Gauge |
| AWG |
ATM Work Group |
B |
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| B2B |
Business-to-business |
| B2C |
Business-to-consumer |
| BABT |
British Approvals Board for Telecommunications |
| BACCS |
Billing, administration and customer care system(s) |
| BACS |
Bankers' Automated Clearing Service |
| BB |
Broadband |
| BBC |
British Broadcasting Corporation |
| BCF |
Base station control function |
| BER |
Bit error rate |
| BFWA |
Broadband fixed wireless access |
| BGP |
Border Gateway Protocol |
| BH |
Busy hour |
| BHCA |
Busy-hour call attempts |
| BHE |
Busy-hour Erlangs |
| BIPT |
Belgian Institute of Postal services and Telecommunications |
| B-ISDN |
Broadband ISDN |
| BIX |
Budapest Internet Exchange |
| BNIX |
Belgian National IP Exchange |
| BOM |
Bill of materials |
| BOS |
Bellcore output standards |
| BOSS |
Business operational support systems |
| BPO |
Business process outsourcing |
| BPON |
Broadband passive optical network |
| BPR |
Business process re-engineering |
| BR |
Basic rate |
| BRAN |
Broadband radio access networks |
| BRAS |
Broadband remote access server |
| BREW |
Binary Runtime Environment for Wireless |
| BR-ISDN |
Basic-rate ISDN |
| BSC |
Base station controller |
| BSC |
Binary synchronous communications |
| BSS |
Base station system |
| BSS |
Business support system |
| BTO |
Build-transfer-operate |
| BTS |
Base transceiver station (more commonly referred to as a base station) |
| BUS |
Broadcast and unknown server |
| BWA |
Broadband wireless access |
C |
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| C-1 etc. |
Container (SDH standard) |
| C of O |
Cost of ownership |
| CA |
Certification authority |
| CAC |
Connection admission control |
| CAGR |
Compound annual growth rate |
| CALA |
Central and Latin America |
| CAM |
Computer-aided manufacturing |
| CAMA |
Centralised automatic message accounting |
| CAO |
Chief administrative officer |
| CAP |
Carrierless amplitude and phase modulation |
| CAP |
Competitive access provider |
| CAP |
Customer Access Point |
| Capex |
Capital expenditure |
| CARE |
Customer account record exchange |
| CASE |
Computer-aided software engineering |
| CASP |
Communications application service provider |
| CATV |
Cable TV |
| CB |
Citizens band (low power – up to 4W – public radio) |
| CBD |
Central business district |
| CBDS |
Connectionless broadband data service |
| CBR |
Constant bitrate |
| CBS |
Common base station |
| CBSC |
Central base station controller |
| CCASS |
Central clearing and settlements system |
| CCITT |
Comité Consultatif International de Télégraphique et Téléphonique |
| CCR |
Call completion rate |
| CCS7 |
Common Channel Signalling system number 7 |
| CCSD |
Cellular circuit-switched data |
| CD |
Compact disc |
| CDDI |
Copper-Distributed Data Interface |
| CDF |
Channel Definition Format |
| CDG |
CDMA Development Group |
| CDMA |
Code-Division Multiple Access |
| CDMA2000 |
3G variant of Code-Division Multiple Access |
| CDMS |
Call message detail structure |
| CDN |
Content distribution network |
| CDPD |
Cellular digital packet data |
| CDR |
Call detail record/recording |
| CD-ROM |
Compact disc read-only memory |
| CDV |
Cell delay variation |
| CEE |
Central and Eastern Europe |
| CEN |
Comité Européen de Normalisation |
| CENELEC |
Comité Européen de Normalisation Electrotechnique |
| CEO |
Chief executive officer |
| CEPO |
Certified exchange point operator |
| CEPS |
Common electronic purse specifications |
| CEPT |
Conférence Européenne des Postes et des Télécommunications |
| CER |
Cell error ratio |
| CER |
Call event record |
| CERN |
Conseil Européen pour la Recherche Nucléaire |
| CFB |
Call forwarding busy |
| CFNRc |
Call forwarding on mobile subscriber not reachable |
| CFNRy |
Call forwarding on no reply |
| CFO |
Chief financial officer |
| CFU |
Call forwarding unconditional |
| CGI |
Common Gateway Interface |
| CGI-Bin |
CGI-binary directory |
| CHAP |
Challenge-Handshake Authentication Protocol |
| C-HTML |
Compact hypertext mark-up language |
| CIBER |
Cellular intercarrier billing exchange record |
| CIO |
Chief information officer |
| CIR |
Committed information rate (ATM term) |
| CIS |
Commonwealth of Independent States (countries of the former USSR) |
| CIX |
Commercial Internet Exchange |
| CLASS |
Custom local-area signalling services |
| CLEC |
Competitive local exchange carrier |
| CLI |
Calling line identification |
| CLI |
Command line interface |
| CLIP |
Calling line identification presentation |
| CLIR |
Calling line identification restriction |
| CLP |
Cell loss probability |
| CLR |
Cell loss ratio |
| CMDS |
Call message detail structure |
| CMIP |
Common Management Information Protocol |
| CMISE |
Common management information service element |
| CMO |
Chief marketing officer |
| CMOS |
Complementary metal oxide semiconductor |
| CMP |
Common Management Protocol |
| CMS |
Customer management system |
| CMT |
Comisión del Mercado de las Telecomunicaciones (Spain) |
| CMTS |
Cable modem termination system |
| CMTS |
Cellular mobile telephone system |
| CNM |
Customer network management |
| COBOL |
Common Business-Oriented Language |
| CODIFI |
Comisión del Diseno de la Interface de Facturación Interoperadores |
| COM |
Component Object Model (Microsoft) |
| COO |
Chief operating officer |
| CORBA |
Common Object Request Broker Architecture |
| CORD |
CIBERNET Online Roamer Database (US roamer database standard) |
| CoS |
Class of service |
| COTS |
Commercial off-the-shelf |
| CPE |
Customer premises equipment |
| CPI |
Consumer price index |
| CPN |
Customer premises network |
| CPP |
Calling party pays |
| CPS |
Carrier pre-selection service |
| CPU |
Central processing unit |
| CRC |
Carbon Reduction Commitment |
| CRC |
Cyclic redundancy check |
| CRM |
Customer relationship management |
| CRTC |
Canadian Radio-Telecommunications Commission |
| CSA |
Carrier service area |
| CSC |
Carrier selection code |
| CSI |
Customer sited interconnection |
| CSO |
Chief security officer |
| CSP |
Certified service provider |
| CSP |
Commerce service provider |
| CSP |
Communications service provider |
| CSR |
Customer service representative |
| CSS |
Cascading style sheets |
| CSU |
Channel service unit |
| CSU |
Channel sharing unit |
| CSV |
Comma-separated variable |
| CT |
Cordless telephone/telephony |
| CT1 |
First-generation cordless telephony |
| CT2 |
Second-generation cordless telephony |
| CTD |
Cell transfer delay |
| CTI |
Computer–telephony integration |
| CTIA |
Cellular Telecommunications Industry Association (USA) |
| CTO |
Chief technical officer |
| CTS |
Clear to send |
| CTS |
Cordless telephony system |
| CUG |
Closed user group |
| CUIX |
Central Ukrainian Internet Exchange |
| CVoDSL |
Channelised voice over DSL |
| CWDM |
Coarse Wave Division Multiplexing |
D |
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| DA |
Directory assistance |
| DAB-IP |
Digital Audio Broadcast – Internet Protocol |
| DAM |
Digital asset management |
| DAM |
Dynamic allocation matrix |
| DAMA |
Demand assigned multiple access |
| DAML |
Digital added main line |
| D-AMPS |
Digital advanced mobile phone system |
| D-AMPS 1900 |
Digital advanced mobile phone system 1900MHz |
| DANA |
Data application network adapter |
| DAP |
Directory Access Protocol |
| DASS |
Digital Access Signalling System (a UK access signalling protocol) |
| DAT |
Digital audio tape |
| DAVIC |
Digital Audio-Visual Council |
| DBR |
Deterministic bit rate |
| DBS |
Direct broadcast by satellite |
| DCE |
Data communications equipment |
| DCE |
Distributed Computing Environment (The Open Group) |
| DCiE |
Data centre infrastructure efficiency |
| DCOM |
Distributed Component Object Model (Microsoft) |
| DCS |
Digital Cellular System |
| DCS 1800 |
Digital Communication System 1800MHz (digital cellular telephone standard) |
| DDE |
Dynamic Data Exchange (Microsoft) |
| DDI |
Direct dialling in |
| DDO |
Direct dialling out |
| DDS |
Dynamic data server |
| DE-CIX |
German Commercial Internet Exchange |
| DECT |
Digital European Cordless Telecommunications (the pan-European wireless standard) |
| DES |
Data Encryption Standard |
| DH |
Data handling |
| DHCP |
Dynamic Host Configuration/Control Protocol |
| DHTML |
Dynamic HTML |
| DiffServ |
Differentiated services |
| DISA |
Direct inward service access |
| D-IX |
Denmark Internet Exchange |
| DIY |
Do it yourself |
| DJSU |
Digital junction switching unit |
| DL |
Downlink |
| DLC |
Digital loop carrier |
| DLE |
Digital local exchange |
| DLEC |
Data local exchange carrier |
| DLS |
Digital local switch |
| DLSw |
Data-link switching |
| DMB |
Digital Media Broadcasting |
| DMH |
Data Message Handler (US cellular standard for CDR collection and interchange, based on OSI ROSE protocol) |
| DMO |
Direct mode operation |
| DMS |
Digital Multiplex System |
| DMS |
Discrete multitone signalling |
| DMSU |
Digital main switching unit |
| DMT |
Discrete multitone |
| DNA |
Distributed interNet Application (Microsoft) |
| DNS |
Domain Name System |
| DOCSIS |
Data-Over-Cable Service Interface Specification (ITU standard for cable modems, J.112) |
| DOCSIS2.0 |
Data Over Cable Service Interface Specification 2.0 (ITU-T Recommendation J.122) |
| DOCSIS3.0 |
Data Over Cable Service Interface Specification 3.0 |
| DOF |
Department Of the Future (Telia) |
| DoV |
Data over voice |
| DP |
Data processing |
| DP |
Distribution point |
| DPI |
Deep packet inspection |
| DPNSS |
Digital Private Network Signalling System |
| DQ |
Directory enquiry |
| DQDB |
Dual Queue Double Bus (IEEE standard for WANs) |
| DRAM |
Dynamic random access memory |
| DRM |
Digital rights management |
| DRS |
Digital remote switch |
| DS0 |
Digital Signal, level 0 (1 voice channel; 56kbit/s) |
| DS1 |
Digital Signal, level 1 (24 voice channel; 1.5365Mbit/s) |
| DS3 |
Digital Signal, level 3 (44.736Mbit/s), standardised by the ATM Forum |
| DSL |
Digital subscriber line |
| DSLAM |
Digital subscriber line access multiplexer |
| DSP |
Digital signal processor/processing |
| DSP |
Display System Protocol |
| DSS |
Decision support system |
| DSS1 |
Digital Subscriber Signalling system number 1 |
| DSSS |
Direct-sequence spread spectrum |
| DSU |
Data service unit |
| DSX |
Digital system cross-connect frame |
| DTE |
Data terminal equipment |
| DTH |
Direct to home |
| DTI |
UK Department of Trade and Industry (policy-making body for telecoms) |
| DTM |
Dynamic synchronous Transfer Mode |
| DTMF |
Dual-tone multi-frequency |
| DTP |
Distributed Transaction Processing |
| DTS |
Digital trunk switch |
| DTT |
Digital terrestrial television |
| DTV |
Digital television |
| DUV |
Data under voice |
| DVAP |
Developed Asia–Pacific |
| DVB |
Digital Video Broadcasting |
| DVB-H |
Digital Video Broadcasting – Handheld |
| DVB-SH |
Digital Video Broadcasting – Satellite services to Handheld |
| DVD |
Digital versatile disc |
| DWDM |
Dense wavelength-division multiplexing |
| DXC |
Digital cross-connect |
E |
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| E&E |
Error(s) and exception(s) |
| E911 |
Enhanced 911 (enhanced form of 911 service) |
| EASDAQ |
European Association of Securities Dealers Automated Quotation System |
| EBC |
Element-based charging |
| EBC |
Element-based conveyance |
| EBIT |
Earnings before interest and taxation |
| EBITDA |
Earnings before interest, taxation, depreciation and amortisation |
| EBP |
Electronic bill payment |
| EBPP |
Electronic bill presentment and payment |
| EBT |
Earnings before taxation |
| EC |
European Commission |
| ECCA |
European Cable Communications Association |
| ECM |
Enterprise content managment |
| eCRM |
Electronic customer relationship management |
| ECTRA |
European Committee for Telecommunications Regulatory Authorities |
| ECTUA |
European Council of Telecommunications Users Associations |
| EDGE |
Enhanced Data Rates for Global Evolution |
| EDI |
Electronic data interchange |
| EDIFACT |
Electronic Data Interchange for Administration, Commerce and Transport |
| EDR |
Event data records |
| EEA |
European Economic Area |
| EEPROM |
Electrically erasable programmable read-only memory |
| EFR |
Enhanced full rate |
| EFT |
Electronic funds transfer |
| EFTA |
European Free Trade Association |
| EFTPOS |
Electronic funds transfer at point of sale |
| EGPRS |
Enhanced General Packet Radio Service |
| EGPS |
Enhanced global positioning system (also known as A-GPS) |
| EGSM |
Extended Global System for Mobile communications |
| EHF |
Extra high frequency |
| EIC |
Emerging international carrier |
| EII |
European Information Infrastructure |
| EIR |
Equipment identification register (GSM term) |
| EIS |
Executive information system |
| E-LAN |
Ethernet LAN (multipoint service in a MAN or WAN) |
| EMAP |
Emerging Asia–Pacific |
| EMBC |
European Mobile Broadcasting Council |
| EMC |
Electro-magnetic compatibility |
| EMEA |
Europe, the Middle East and Africa |
| EMH |
Emerging market handset |
| EMI |
Electro-magnetic interference |
| EMI |
Exchange message interface |
| EMR |
Exchange message record |
| EMS |
Element management system |
| EMS |
Enterprise messaging server |
| EMV |
Europay, MasterCard and Visa |
| E-OTD |
Enhanced observed time difference |
| EoSDH |
Ethernet over Synchronous Digital Hierarchy |
| EPC |
Evolved Packet Core |
| EPG |
Electronic programming guide |
| EPOS |
Electronic point of sale |
| EPS |
Earnings per share |
| EQAM |
Edge Quadrature Amplitude Modulator |
| ERC |
European Radiocommunications Committee |
| ERM |
Enterprise relationship management |
| ERMES |
European radio messaging system |
| ERO |
European Radiocommunications Office |
| ERP |
Enterprise resource planning |
| ESA |
Emergency standalone |
| ESB |
Enterprise service bus |
| ESIS |
European Survey of Information Society |
| ESMR |
Enhanced specialised mobile radio |
| ESN |
Electronic serial number |
| ESPANIX |
Spanish Internet Exchange |
| ESQL |
Embedded Standard Query Language |
| EST |
Eastern Standard Time |
| ETACS |
Extended Total Access Communication System |
| ETIS |
European Telecommunications Informatics Service |
| ETNO |
European Telecommunications Network Operators |
| ETO |
European Telecommunications Office |
| ETP |
European Telecommunications Platform |
| ETSI |
European Telecommunications Standards Institute |
| EU |
European Union |
| EV |
Enterprise value |
| EV-DO |
CDMA2000 1× Evolution Data Only |
| EV-DO Rev. A |
CDMA2000 1× Evolution Data Only revision A |
| EV-DV |
CDMA2000 1× Evolution Data and Voice |
| EVRC |
Enhanced variable rate codec |
| EVUA |
European VPN Users' Association |
| EXCA |
Exchangeable card architecture |
F |
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| F2M |
Fixed-to-mobile |
| FAC |
Fully allocated costs |
| FAQ |
Frequently asked question |
| FCAPS |
Fault, Configuration, Accounting, Performance, Security |
| FCC |
Federal Communications Commission (USA) |
| FDD |
Frequency-division duplex |
| FDDI |
Fibre Distributed Data Interface |
| FDM |
Frequency-division multiplexing |
| FDMA |
Frequency-division multiple access |
| FEC |
Forward error correction |
| FECN |
Forward explicit congestion notification |
| FEXT |
Far end Crosstalk |
| FH-CDMA |
Frequency-hopping code-division multiple access |
| FHSS |
Frequency-hopping spread spectrum |
| FI-CIX |
Finnish Internet Exchange |
| FIFO |
First in, first out (buffer) |
| FIPS |
Federal Information Processing Standards |
| FITL |
Fibre in the loop |
| FL-RAIC |
Forward-looking long-run average incremental cost |
| FMC |
Fixed–mobile convergence |
| FMCG |
Fast-moving consumer goods |
| FMS |
Fixed–mobile substitution |
| FMS |
Fraud management system |
| FOB |
Free on board |
| FoIP |
Fax-over-Internet Protocol |
| FOMA |
Freedom of Mobile Multimedia Access (NTT DoCoMo 3G service) |
| FPLMN |
Fixed public land mobile network |
| FPLMTS |
Full public land mobile telephone service |
| FR |
Frame relay |
| FRAD |
Frame relay assembler/disassembler |
| FRAD |
Frame relay access device |
| FRIACO |
Flat-rate Internet access call origination |
| FSAN |
Full-services access network |
| FSN |
Full-service network |
| FTA |
Free to air |
| FTAM |
File Transfer, Access and Management (ISO) |
| FTE |
Full-time employee |
| FTP |
File Transfer Protocol |
| FTSE |
Financial Times Stock Exchange |
| FTTB |
Fibre to the building |
| FTTC |
Fibre to the cabinet |
| FTTC |
Fibre to the curb |
| FTTH |
Fibre to the home |
| FTTN |
Fibre to the node |
| FTTS |
Fibre to the street |
| FTTx |
Fibre to the x |
| FUNI |
Frame-User Network Interface |
| FWA |
Fixed wireless access |
G |
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| G7 |
Group of Seven |
| GAAP |
General American Accounting Principles |
| GCRA |
Generic cell rate algorithm |
| GCC |
Global Cooperation Council |
| GDP |
Gross domestic product |
| GEO |
Geo-stationary (satellite) |
| GGSN |
Gateway GPRS support node |
| GIF |
Graphics Interchange Format |
| GigE |
Gigabit Ethernet |
| GIS |
Geographical information system |
| GIVN |
Global interactive voice network |
| GIX |
Global Internet exchange |
| GM |
General manager |
| GMM |
Global mobile multimedia |
| GMPLS |
Generalized Multiprotocol Label Switching |
| GNP |
Geographic number portability |
| GNP |
Gross national product |
| GOS |
Grade of service |
| GPON |
Gigabit Passive Optical Network |
| GPRS |
General Packet Radio Service |
| GPS |
Global positioning system |
| GRE |
Generic Routeing Encapsulation |
| GRIC |
Global Reach Internet Connection |
| GSA |
Global Service Alliance |
| GSM |
Global System for Mobile Communications |
| GSMA |
GSM Association |
| GSP |
Global service provider |
| GUI |
Graphical user interface |
H |
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| HAN |
Home access network |
| HD |
High definition |
| HDB3 |
High-density bipolar-3 (line code) |
| HDLC |
High-level Data Link Control |
| HDML |
Handheld device mark-up language |
| HDSL |
High-bit-rate digital subscriber link |
| HDTV |
High-definition television |
| HF |
High frequency |
| HFC |
Hybrid fibre coax |
| HK-IX |
Hong Kong Internet Exchange |
| HLR |
Home location register |
| HPC |
Handheld PC |
| HPLMN |
Home public land mobile network |
| HQ |
Headquarters |
| HR |
Human resources |
| HRIS |
Human resource information system |
| HSCSD |
High-speed circuit-switched data |
| HSDPA |
High-Speed Downlink Packet Access |
| HSDPA+ |
Evolved High-Speed Downlink Packet Access |
| HSPA |
High-Speed Packet Access |
| HSPA+ |
Evolved High-Speed Packet Access |
| HSSI |
High-speed Serial Interface |
| HSUPA |
High-speed Uplink Packet Access |
| HTML |
Hypertext Mark-up Language |
| HTTP |
Hypertext Transfer Protocol |
| HTTPS |
Hypertext Transfer Protocol Secure |
| HVAC |
Heating, ventilating and air-conditioning |
I |
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| IAD |
Integrated access device |
| IAP |
Internet access provider |
| IBS |
Internet business services |
| IC |
Integrated circuit |
| I-CMTS |
Integrated cable-modem termination system |
| ICP |
Integrated communications provider |
| ICP |
Internet content provider |
| ICSA |
Internet Cellular Smart Access (Microsoft platform) |
| ICT |
Information and communication technology |
| ID |
Identification |
| IDD |
International direct dial |
| iDEN |
Integrated Digital Enhanced Network |
| IDL |
Interface definition language |
| IPDR |
Internet Protocol data record |
| IDSL |
ISDN digital subscriber line |
| IEC |
Interconnection extension circuit |
| IEEE |
Institute of Electrical and Electronic Engineers (UK) |
| IETF |
Internet Engineering Task Force |
| IFL |
International facilities licence |
| IFX |
International Financial Exchange |
| IGF |
International gateway facility |
| IIS |
Internet Information Server (Microsoft) |
| ILEC |
Incumbent local-exchange carrier |
| ILMI |
Interim Link Management Interface |
| IM |
Instant messaging |
| IMAP |
Internet Message Access Protocol |
| IMEI |
International Mobile Equipment Identification |
| IMS |
IP Multimedia Subsystem |
| IMSI |
International Mobile Subscriber Identity (ITU) |
| IMT-2000 |
International Mobile Telecommunications-2000 |
| IN |
Intelligent network |
| INAP |
IN Application Protocol |
| INCA |
Inter-Network Call Accounting system (BT) |
| INMS |
International network management system |
| I/O |
Input/output |
| ION |
Integrated on-demand network |
| IP |
Internet Protocol |
| iPBX |
IP private branch exchange |
| IPDR |
IP detail record |
| IPLC |
International private leased circuit |
| IP-MPLS |
IP Multiprotocol Label Switching |
| IPO |
Initial public offering |
| IPPV |
Impulse pay per view |
| IPR |
Intellectual property rights |
| IPsec |
Internet Protocol security (A secure version of the IP that provides optional authentication and encryption at the packet level) |
| IPT |
IP telephony |
| IPTV |
Internet Protocol TV |
| IPv4 |
Internet Protocol version 4 |
| IPv6 |
Internet Protocol version 6 |
| IP VPN |
Internet Protocol virtual private network |
| IPX |
Internetwork Packet Exchange (Novell LAN Protocol) |
| IR |
International reseller |
| IRQ |
Interrupt request |
| IRU |
Indefeasible right of use |
| IS |
Interim Standard |
| ISA |
Industry Standard Architecture |
| ISC |
International switching centre |
| ISDN |
Integrated Services Digital Network |
| ISDN-BRI |
ISDN basic rate interface |
| ISDX |
Integrated Services Digital Exchange |
| ISH |
Information super-highway |
| ISI |
In-Span interconnection |
| ISM |
Industrial, scientific and medical |
| ISO |
International settlement operator |
| ISO |
International Organization for Standardization |
| ISP |
Internet service provider |
| ISPBX |
Integrated services private branch exchange |
| ISR |
International simple resale |
| ISUP |
ISDN user part |
| ISV |
Independent software vendor |
| IT |
Information technology |
| ITHS |
Internet telephony home server |
| ITSP |
Internet telephony service provider |
| ITU |
International Telecommunication Union |
| IUP |
Interworking user part |
| IVPN |
International virtual private network |
| IVR |
Interactive voice response |
| IVR(S) |
Interactive voice response (system) |
| IVT |
Interface validation testing |
| IWU |
Interworking unit |
| IXC |
Interexchange carrier (US long-distance operator) |
J |
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| J2EE |
Java 2 platform, Enterprise Edition |
| J2ME |
Java 2 platform, Micro Edition |
| JAIN |
Java APIs for Integrated Networks |
| JAMES |
Joint ATM Experiment on European Services (EC ACTS project) |
| Java EE |
Java platform, Enterprise Edition |
| JDBC |
Java database connection |
| JDP |
Joint development partner |
| JPEG |
Joint Photographic Experts Group |
| JSP |
JavaServer Page |
| JTAC |
Japanese Total Access Communication |
| JV |
Joint venture |
K |
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| KPI |
Key performance indicator |
| KPI |
Key public infrastructure |
L |
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| L2F |
Layer 2 Forwarding (Cisco Systems) |
| LAMA |
Local Automatic Message Accounting |
| LAN |
Local-area network |
| LANE |
LAN emulation |
| LATA |
Local access and transport area |
| LBS |
Location base station |
| LCA |
Local call area |
| LCD |
Liquid crystal display |
| LCP |
Link Control Protocol |
| LCR |
Least-cost routeing |
| LDAP |
Lightweight Directory Access Protocol |
| LDO |
Local delivery operator |
| LEC |
LAN emulation client |
| LEC |
Local exchange carrier |
| LEN |
Line equipment number |
| LEO |
Low Earth orbit |
| LES |
LAN emulation server |
| LF |
Low frequency |
| LIDB |
Line-identification database |
| LINX |
London Internet Exchange |
| LLUB |
Local loop unbundling |
| LMCS |
Local multipoint communications Services |
| LMDS |
Local multipoint distribution system |
| LMU |
Location measurement unit |
| LNB |
Low-noise block receiver |
| LNC |
Location network controller |
| LNP |
Local number portability |
| LRAIC |
Long-run average incremental cost |
| LRIC |
Long-run incremental cost |
| LSP |
Line switched path |
| LT |
Line termination |
| LTE |
Line terminating equipment |
| LTE |
Long Term Evolution (3GPP) |
| LTID |
Logical terminal identifier |
| LTN |
Line terminating number |
| LTO |
Local telecoms operator |
M |
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| M&A |
Merger and acquisition |
| M2M |
Machine to machine |
| MAC |
Media Access Control |
| MAE |
Metropolitan access exchange |
| MAN |
Metropolitan-area network |
| MAP |
Mobile Application Part |
| MaxCTD |
Maximum cell transfer delay |
| MBMS |
Multimedia broadcast and multicast service |
| MBS |
Maximum burst size |
| MBWA |
Mobile Broadband Wireless Access (IEEE) |
| MC |
Multipoint controller |
| MCMD |
Mobile content management and delivery |
| M-CMTS |
Modular cable modem termination system |
| MCNS |
Multimedia cable network system |
| MCPC |
Multiple channel per carrier |
| MCR |
Minimum cell rate |
| MCU |
Multipoint control unit |
| MD |
Managing director |
| MDF |
Main distribution frame |
| MDM |
Mobile device management |
| MDNS |
Managed data network service |
| MDR |
Message detail recording |
| MDSS |
Marketing decision support system |
| MDWDM |
Metropolitan dense wave division multiplexing |
| MECAB |
Multiple exchange carrier access billing |
| MENA |
Middle East and North Africa |
| MEO |
Medium Earth orbit |
| MF |
Multi-frame |
| MF |
Multi-frequency |
| MFJ |
Modified Final Judgement |
| MGC |
Media gateway controller |
| MGCP |
Media Gateway Control Protocol |
| MHS |
Message Handling Service |
| MIB |
Management Information Base (IETF) |
| MIM |
Mobile instant messaging |
| MIME |
Multipurpose Internet Mail Extensions |
| MIMO |
Multiple-input multiple-output |
| MIN |
Mobile identification number |
| MIPS |
Million instructions per second |
| MIS |
Management information system |
| MIU |
Minimum investment unit |
| MIX |
Milan Internet Exchange |
| MLC |
Mobile location centre |
| MMDS |
Multichannel multipoint distribution system |
| MME |
Mobile media and entertainment |
| MMI |
Machine-to-machine interface |
| MMIC |
Monolithic microwave integrated circuit |
| MML |
Man–machine language |
| MML |
Mobile Mark-up Language |
| MMS |
Multimedia Messaging Service |
| MNC |
Multinational corporation |
| MNO |
Mobile network operator |
| MNP |
Mobile number portability |
| MNS |
Managed network service |
| MNSP |
Managed network service provider |
| MOD |
Magnetic optical disk |
| MOM |
Message-oriented middleware |
| MoU |
Memorandum of understanding |
| MoU |
Minutes of use |
| MP |
Multipoint processor |
| MP3 |
MPEG-1 Audio Layer 3 |
| MPEG |
Moving Pictures Experts Group |
| MPLS |
Multi-Protocol Label Switching (IETF |
| MPOA |
Multi-Protocol Over ATM (ATM Forum) |
| MPP |
Mobile party pays |
| MPP |
Multiple parallel processor |
| MPS |
Managed packet system |
| MPT |
Ministry of Posts and Telecommunications (Japan) |
| MRO |
Maintenance, repairs and operations |
| MRP |
Material requirements planning |
| MS |
Mobile subsystem |
| MSA |
Metropolitan Statistical Area (USA) |
| MSAN |
Multi-service access node |
| MSC |
Mobile switching centre |
| MSISDN |
Mobile Subscriber Integrated Services Digital Network Number |
| MSN |
Mechanical serial number |
| MSO |
Multiple system operator |
| MSS |
Mobile satellite services |
| MTA |
Message transfer agent |
| MTP |
Message Transfer Part |
| MTR |
Mobile termination rate |
| MUX |
Multiplexer |
| MVDS |
Multipoint video distribution system |
| MVNO |
Mobile virtual network operator |
| MVPN |
Mobile virtual private network |
| MVS |
Multiple virtual service |
N |
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| NA |
North America |
| NAMPS |
Narrowband Analogue Mobile Phone Service |
| NAP |
Network access point |
| NAS |
Network access server |
| NASDAQ |
National Association of Securities Dealers Automated Quotation System |
| NAT |
Network address translation |
| NB |
Narrowband |
| NB-FWA |
Narrowband fixed wireless access |
| NBMA |
Non-broadcast multiple access |
| NCC |
New Common Carrier (Japan) |
| NCCN |
Network charge change notice |
| NCP |
Network Control Protocol |
| NE |
Network element |
| NEBS |
Network Equipment-Building Systems |
| NEM |
Network equipment manufacturer |
| NEP |
Network equipment provider |
| NETS |
Network for Electronic Transfers |
| NEXT |
Near-end cross-talk |
| NFC |
Near Field Communication |
| NGA |
Next-generation access |
| NGIN |
Next-generation intelligent network |
| NGN |
Next-generation network |
| NGO |
Non-governmental organisation |
| NGOSS |
New Generation Operations Systems and Software |
| NHRP |
Next Hop Resolution Protocol |
| NIC |
Network interface card |
| NICC |
Network Interoperability Consultative Committee |
| NICE |
National Hosts Interconnection Experiments |
| NID |
Network interface device |
| NII |
National Information Infrastructure (USA) |
| N-ISDN |
Narrowband ISDN |
| NIT |
Network interworking tests |
| NIX |
Norway Internet Exchange |
| NIX.CZ |
Neutral Internet Exchange of the Czech Republic |
| NLC |
Network line card |
| NMS |
Network management services |
| NMS |
Network management systems |
| NMT |
Nordic Mobile Telephone |
| NNI |
Network Node Interface |
| NNI |
Network-to-network interface |
| NNTP |
Network News Transport Protocol |
| NOC |
Network operations centre |
| NPC |
Network parameter control |
| NPT |
Norwegian Post and Telecommunications Authority (Post-og Teletilsynet) |
| NPV |
Net present value |
| NRA |
National regulatory authority |
| nrt-VBR |
Near-real-time variable bit rate |
| NSP |
Network service provider |
| NT |
Network termination |
| NTE |
Network terminating equipment |
| NTS |
Number Translation Services |
| NTU |
Network terminating unit |
| NVOD |
Near video on demand |
| NY-IIX |
New York International Internet Exchange |
O |
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| O&M |
Operations and maintenance |
| OAAP |
Oracle Authorized Application Provider |
| OADM |
Optical add-drop multiplexer |
| OAM |
Operations, administration and maintenance |
| OASIS |
Organization for the Advancement of Structured Information Standards |
| OC |
Optical Carrier |
| OCR |
Optical character recognition |
| OCSP |
Online Certificate Status Protocol |
| ODBC |
Open Database Connectivity (Microsoft) |
| ODF |
Optical distribution frame |
| OECD |
Organisation for Economic Co-operation and Development |
| OEM |
Original equipment manufacturer |
| OF |
Optical fibre |
| OFDM |
Orthogonal frequency division multiplexing |
| OFDMA |
Orthogonal frequency division multiple access |
| OFX |
Open Financial Exchange |
| OLAP |
Online analytical processing |
| OLE |
Object Linking and Embedding (Microsoft) |
| OLO |
Other licensed operator |
| OLT |
Optical line termination |
| OLTP |
Online transaction processing |
| OLTU |
Optical line termination unit |
| OMC |
Operations and maintenance centre |
| ONP |
Open network provision |
| ONU |
Optical network unit |
| OODBMS |
Object-oriented database management system |
| OPTA |
Onafhankelijke Post en Telecommunicatie Autoriteit (Netherlands) |
| ORB |
Object request broker |
| OS |
Operating system |
| OSA |
Open Service Access |
| OSF |
Open Software Foundation |
| OSI |
Open Systems Interconnection (ISO) |
| OSP |
Online service provider |
| OSPF |
Open Shortest Path First |
| OSS |
Operations support system |
| OTA |
Over the air |
| OTC |
Over the counter |
| OTDOA |
Observed time difference of arrival |
P |
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| P2P |
Peer to peer |
| P2P |
Person to person |
| PABX |
Private automatic branch exchange |
| PACS |
Personal access communications system |
| PAD |
Packet assembler/disassembler |
| PAL |
Phase Alternate Line |
| PAL |
Public access line |
| PAMA |
Pre-assigned multiple access |
| PAMR |
Public access mobile radio |
| PAN |
Personal-area network |
| PARIX |
Paris Internet Exchange |
| PAYG |
Pay as you go |
| PBB-TE |
Provider Backbone Bridge Traffic Engineering |
| PBR |
Private business radio |
| PBX |
Private branch exchange |
| PC |
Personal computer |
| PCB |
Printed circuit board |
| PCCP |
Primary cross-connect point |
| PCI |
Peripheral Component Interconnect |
| PCI |
Protocol-control information |
| PCM |
Pulse code modulation |
| PCMCIA |
Personal Computer Memory Card International Association |
| PCN |
Personal communications network |
| PCR |
Peak cell rate |
| PCRF |
Policy and Charging Rules Function |
| PCS |
Personal Communications System |
| PCS 1900 |
Frequency-specific PCS |
| PC-TV |
Personal computer/television |
| PDA |
Personal digital assistant |
| PDC |
Personal Digital Cellular |
| PDC-P |
Personal Digital Cellular – Packet-Switched |
| PDE |
Personal digital entertainment |
| PDF |
Portable Data Format |
| PDH |
Plesiochronous digital hierarchy |
| PDN |
Public data network |
| PER |
Price/earnings ratio |
| PGP |
Pretty Good Privacy |
| PHB |
Per-hop behaviour |
| PHS |
Personal Handy-phone System |
| PIC |
Primary interchange carrier |
| PIM |
Personal information management |
| PIM |
Protocol-Independent Multicast |
| PIN |
Personal identification number |
| PKI |
Public key infrastructure |
| PLMN |
Public land mobile network |
| PMR |
Private mobile radio |
| PNG |
Portable Network Graphics |
| PNNI |
Private Network-to-Network Interface |
| POCSAG |
Post Office Code Standardization Advisory Group |
| POI |
Point Of interconnection |
| PON |
Passive optical network |
| POP |
Point of presence |
| POP |
Post Office Protocol |
| POP3 |
Post Office Protocol Version 3 |
| PoS |
Packet over SONET |
| POS |
Point of sale |
| POSIX |
Portable Operating System Interface (IEEE) |
| POTS |
Plain old telephone service |
| PPP |
Point-to-Point Protocol (IETF) |
| PPP |
Product management, policy and planning |
| PPP |
Purchasing power parity |
| PPTP |
Point-to-Point Tunneling Protocol |
| PPV |
Pay per view |
| PR |
Primary rate |
| PR |
Public relations |
| PRF |
Pulse repetition frequency |
| PRI |
Primary Rate Interface |
| PR-ISDN |
Primary-rate ISDN |
| PRS |
Premium-rate service |
| PSA |
Product and Service Assembly Initiative |
| PSDN |
Packet-switched data network |
| PSRCP |
Public Safety Radio Communications Project |
| PST |
Pacific Standard Time |
| PSTN |
Public switched telephone network |
| PSU |
Power supply unit |
| PTK |
Performance toolkit |
| PTM |
Point to multipoint |
| PTO |
Public telecommunications operator |
| PTP |
Point to point |
| PTS |
Post-och Telestyrelsen (Sweden) |
| PTT |
Postal, telephone and telegraph |
| PTT |
Push-to-talk |
| PUC |
Public utilities commission |
| PUE |
Power usage effectiveness |
| PVC |
Permanent virtual circuit |
| PVP |
Permanent virtual path |
| PVR |
Personal video recorder |
Q |
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| QA |
Quality assurance |
| QAM |
Quadrature amplitude modulation |
| QIC |
Quarter-inch cartridge |
| QoE |
Quality of experience |
| QoS |
Quality of service |
| QPSK |
Quadrature phase shift keying |
R |
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| R&D |
Research and development |
| RADIUS |
Remote Authentication Dial-In User Service (IETF) |
| RADSL |
Rate-adaptive digital subscriber line |
| RAID |
Redundant array of inexpensive disks |
| RAM |
Random access memory |
| RAN |
Radio access network |
| RAS |
Registration, admission and status |
| RAS |
Remote-access server |
| RBOC |
Regional Bell operating company |
| RCU |
Remote concentrator unit |
| RDBMS |
Relational database management system |
| REST |
Representational state transfer |
| RF |
Radio frequency |
| RFC |
Request for comment |
| RFI |
Request for information |
| RFID |
Radio frequency identification |
| RFP |
Request for proposal |
| RGU |
Revenue generating unit |
| RIC |
Radio Identity Code |
| RIO |
Reference interconnect offering |
| RISC |
Reduced instruction set computer |
| RMON |
Remote Monitoring (IETF) |
| RNC |
Radio network controller |
| ROADM |
Reconfigurable optical add-drop multiplexer |
| ROI |
Return on investment |
| RoS |
Return of Service |
| ROSE |
Remote Operations Service Element |
| RPC |
Remote procedure call |
| RPI |
Retail Prices Index |
| RSA |
Regional service alliance |
| RSG |
Residential services gateway |
| RSU |
Remote subscriber unit |
| RSVP |
Resource Reservation Protocol |
| RTC |
Real-time charging |
| RTCP |
RTP Control Protocol |
| RTF |
Rich Text Format |
| RTP |
Real-time Transport Protocol |
| RTSP |
Real Time Streaming Protocol |
| RTT |
Radio transmission technology |
| rt-VBR |
Real-time variable bit rate |
| RUO |
Reference unbundling offer |
| RWIS |
Road weather information systems |
S |
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| SAA |
Systems Application Architecture (IBM) |
| SaaS |
Software as a service |
| SAE |
System Architecture Evolution |
| SAN |
Storage area network |
| SAP |
Service access point |
| SBA |
Small Business Administration |
| SBC |
Session border controller |
| SBR |
Statistical bit rate |
| SCCP |
Secondary cross-connect point |
| SCDMA |
Synchronous code-division multiple access |
| SCE |
Service creation environment |
| SCF |
Service control function |
| SCM |
Supply chain management |
| SCN |
Switched circuit network |
| SCP |
Service control point |
| SCPC |
Single channel per carrier |
| SCR |
Sustainable cell rate |
| SCSI |
Small Computer System Interface |
| SDE |
Service delivery environment |
| SDF |
Service delivery framework |
| SDF |
Sub-loop distribution frame |
| SDH |
Synchronous Digital Hierarchy |
| SDK |
Software development kit |
| SDL |
Signalling data link |
| SDLC |
Synchronous Data Link Control |
| SDN |
Software-defined network |
| SDP |
Service delivery platform |
| SDP |
Session Description Protocol |
| SDR |
Software-defined radio |
| SDR |
Special drawing rights |
| SDSL |
Symmetric digital subscriber line |
| SDTV |
Standard definition television |
| SEAQ |
Stock exchange automated quotation |
| SEC |
Securities and Exchange Commission (USA) |
| SECABS |
Small exchange carrier access billing system |
| SET |
Secure Electronic Transaction |
| SFA |
Sales force automation |
| SFINX |
Service for French Internet Exchange |
| SG |
Signalling gateway |
| SGSN |
Serving GPRS support node |
| SHA |
Secure hash algorithm |
| SHDSL |
Single-pair high-speed digital subscriber line |
| SHF |
Super-high frequency |
| SHTTP |
Secure Hypertext Transfer Protocol |
| SI |
Systems integrator |
| SIC |
Standard Industrial Classification |
| SID |
System identification number |
| SIGTRAN |
Signalling transport |
| SIM |
Subscriber identity module |
| SIP |
Session Initiation Protocol |
| SIVR |
Speaker-independent voice recognition |
| SIX |
Slovak Internet Exchange |
| SKA |
Sender keeps all |
| SLA |
Service-level agreement |
| SLC |
Subscriber line card |
| SLEE |
Service Logic Execution Environment |
| SLIP |
Serial Line Internet Protocol |
| SLR |
Single lens reflex |
| SLU |
Sub-loop unbundling |
| SMATV |
Satellite master antenna television |
| SMC |
Standard management committee |
| SMDR |
Station message detail recording |
| SMDS |
Switched multimegabit data service |
| SME |
Small or medium-sized enterprise |
| S/MIME |
Secure Multipurpose Internet Mail Extensions |
| SMP |
Significant market power |
| SMP |
Symmetric multiprocessing |
| SMR |
Specialised mobile radio |
| SMS |
Service management system |
| SMS |
Short Message Service |
| SMSC |
Short Message Service centre |
| SMT |
Surface-mounting technology |
| SMTP |
Simple Mail Transfer Protocol |
| SMU |
System management unit |
| SNA |
Systems Network Architecture (IBM) |
| SNG |
Satellite news gathering |
| SNMP |
Simple Network Management Protocol |
| SOA |
Service-oriented architecture |
| SOAP |
Simple Object Access Protocol |
| SOHO |
Small office/home office |
| SONET |
Synchronous Optical Network |
| SPA |
Shared port adaptor |
| SPB-IX |
St Petersburg Exchange |
| SPX |
Sequenced Packet Exchange |
| SQL |
Structured Query Language |
| SS7 |
Signaling System 7 |
| SSA |
Sub-Sarahan Africa |
| SSL |
Secure Sockets Layer |
| SSP |
Service switching point |
| STB |
Set-top box |
| STD |
Subscriber trunk dialling |
| STK |
SIM Application Tool Kit |
| STM |
Synchronous Transport Module |
| STP |
Shielded twisted pair |
| STP |
Signal transfer point |
| STV |
Subscription television |
| SUR |
Service usage record |
| SVC |
Switched virtual circuit |
| SVGA |
Super Video Graphics Array |
| SWAP |
Shared Wireless Access Protocol |
| SWOT |
Strengths, weaknesses, opportunities and threats |
| SyncML |
Synchronization Mark-up Language |
T |
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| TA |
Terminal adapter |
| TAC |
Telecommunications Administration Centre (Finland) |
| TACACS |
Terminal Access Controller Access Control System |
| TACS |
Total Access Communications System |
| TADIG |
Transferred Account Data Interchange Group |
| TAM |
Telecom Applications Map (TM Forum) |
| TAP |
Telocator Alphanumeric Protocol |
| TAP |
Transferred Account Procedure (GSMA) |
| TAPI |
Telephony Application Programming Interface (Microsoft) |
| TAS |
Telecoms application servers |
| TASI |
Time-assigned speech interpolation |
| TC |
Transcoder |
| TCAP |
Transactional Capabilities Application Part |
| TCO |
Total cost of ownership |
| TCP |
Transmission Control Protocol |
| TCP/IP |
Transmission Control Protocol/Internet Protocol |
| TDD |
Time-division duplex |
| TD-SCDMA |
Time Division-Synchronous Code-Division Multiple Access (3GPP) |
| TDM |
Time-division multiplexing |
| TDMA |
Time-division multiple access |
| TDOA |
Time difference of arrival |
| TDR |
Time-domain reflectometer |
| TE |
Terminal equipment |
| TELRIC |
Total element long-run incremental cost |
| TEN |
Trans-European Network |
| TEN-IBC |
Trans-European Network – Integrated Broadband Communications |
| TETRA |
Trans-European Trunked Radio Access |
| TFT |
Thin-film transistor |
| TGW |
Trunk gateway |
| TIA |
Telecommunications Industry Association |
| TIPHON |
Telecommunications and Internet Protocol Harmonisation Over Networks |
| TISPAN |
Telecoms and Internet converged Services and Protocols for Advanced Networking |
| TL1 |
Transaction Language 1 |
| TLI |
Transport Layer Interface |
| TLS |
Transport Layer Security |
| TMN |
Telecommunications Management Network (ITU-T) |
| TMT |
Technology, media and telecommunications |
| TOA |
Time Of arrival |
| TP |
Transaction processing |
| TP |
Twisted pair |
| TPM/LERG |
Terminating Point Master/Local Exchange Routeing Guide |
| TPMR |
Trunked private mobile radio |
| TPON |
Telephony passive optical network |
| TR-069 |
Technical Report 069 |
| TRX |
Transceiver unit |
| TSLRIC |
Total service long-run incremental cost |
| TU |
Tributary Unit |
| TUG |
Tributary Unit Group |
| TUP |
Telephone User Part |
| TURNET |
Turkish Internet Exchange |
| TV |
Television |
| TVRO |
Television receive only |
U |
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| UAE |
United Arab Emirates |
| UAWG |
Universal ADSL Working Group |
| UBR |
Unspecified bit rate |
| UBR+ |
Unspecified bit rate plus |
| UCC |
Uniform Code Council |
| UDP |
User Datagram Protocol |
| UDR |
Usage data record |
| UEQAM |
Universal edge quadrature amplitude modulation |
| UGC |
User-generated content |
| UHF |
Ultra-high frequency |
| UL |
Up-Link |
| ULF |
Ultra-low frequency |
| ULL |
Unbundled local loop |
| UMA |
Unlicensed Mobile Access (3GPP) |
| UMB |
Ultra Mobile Broadband (3GPP2) |
| UMS |
Unified messaging service |
| UMTS |
Universal Mobile Telecommunications System (ITU) |
| UNE |
Unbundled network element |
| UNI |
User-Network Interface (ATM Forum) |
| UNIX |
Operating system for data-processing and telephone systems |
| UOI |
Unit of input |
| UPC |
Usage parameter control |
| UPS |
Uninterruptible power supply |
| UPT |
Universal personal telecommunications |
| URL |
Universal resource locator |
| USB |
Universal Serial Bus |
| USC |
Universal service contribution |
| USF |
Universal service fee |
| USO |
Universal service obligation |
| USP |
Unique selling point |
| USSD |
Unstructured Supplementary Services Data |
| UTP |
Unshielded twisted pair |
| UTRAN |
UMTS terrestrial radio access network |
| UUCP |
Unix-to-Unix Copy Program |
| UV |
Ultraviolet |
| UWB |
Ultrawideband |
V |
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| VAN |
Value-added network |
| VANS |
Value-added network service |
| VAR |
Value-added reseller |
| VAS |
Value-added service |
| VASP |
Value-added service provider |
| VAT |
Value-added tax |
| VBI |
Vertical blanking interval |
| VBR |
Variable bit rate |
| VC |
Venture capital |
| VC |
Virtual channel |
| VC |
Virtual circuit |
| VC |
Virtual Container |
| VCC |
Voice call continuity |
| VCR |
Video cassette recorder |
| VDSL |
Very-high-bitrate digital subscriber line |
| VDSL2 |
Very-high-bitrate digital subscriber line 2 |
| VDSL2+ |
Very-high-bitrate digital subscriber line 2+ |
| VGA |
Video Graphics Array |
| VGE |
Voice grade equivalent |
| VHF |
Very high frequency |
| VIP |
Very important person |
| VISP |
Virtual Internet service provider |
| VIX |
Vienna Internet Exchange |
| VLAN |
Virtual local-area network |
| VLEC |
Virtual local exchange carrier |
| VLF |
Very low frequency |
| VLR |
Visitor location register |
| VLSI |
Very-large-scale integration |
| VMS |
Virtual Memory System |
| VMS |
Voice message service |
| VNO |
Virtual network operator |
| VoATM |
Voice over Asynchronous Transfer Mode |
| VoBB |
Voice over broadband |
| VoD |
Video on demand |
| VoDSL |
Voice over digital subscriber line |
| VoFR |
Voice over frame relay |
| VoIM |
Voice over instant messaging |
| VoIP |
Voice over Internet Protocol |
| VoWLAN |
Voice over wireless local-area network |
| VP |
Vice president |
| VP |
Virtual path |
| VPDN |
Virtual private data network |
| VPLMN |
Visitor public land mobile network |
| VPN |
Virtual private network |
| VPOP |
Virtual point of presence |
| VRML |
Virtual Reality Modeling Language |
| VRU |
Voice response unit |
| VSAT |
Very small aperture terminal |
| VXML |
Voice Extensible Mark-up Language |
W |
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| W3C |
World Wide Web Consortium |
| WAN |
Wide-area network |
| WAP |
Wireless Application Protocol |
| WASP |
Wireless application service provider |
| W-CDMA |
Wideband Code-Division Multiple Access |
| WDM |
Wavelength division multiplexing |
| WFM |
Workforce management |
| WiBro |
Wireless Broadband |
| Wi-Fi |
Wireless Fidelity |
| WIM |
Wireless identification module |
| WiMAX |
Worldwide Interoperability for Microwave Access |
| WIP |
Work in progress |
| WISP |
Wireless Internet service provider |
| WLAN |
Wireless local-area network |
| WLANA |
Wireless LAN Association |
| WLL |
Wireless local loop |
| WLR |
Wholesale line rental |
| WML |
Wireless Mark-up Language |
| WPKI |
Wireless Public Key Infrastructure |
| WTLS |
Wireless Transport Layer Security |
| WTO |
World Trade Organization |
X Y Z |
|
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| xDSL |
Generic digital subscriber line |
| XHTML |
Extensible Hypertext Mark-up Language |
| XML |
Extensible Mark-up Language |
| XPG4 |
X/open Portability Guide 4 |
