| AAV |
Alternative
Access Vendor |
| ABR |
Available
Bit Rate |
| AC |
Access Control, or Alternating Current, or Authentication
Center (also AUC) |
| ACD |
Automatic
Call Distributor |
| ACE |
Authentication
Encryption |
| ACEK |
Authentication
Encryption Key |
| ACK |
Acknowledgement
|
| ACP |
Access
Control Point |
| ACRE
|
Authorization
and Call Routing Equipment |
| ADM |
Add-Drop
Multiplexer (SDH Element) |
| ADPCM |
Adaptive
Differential Pulse Code Modulation |
| ADSL |
Asymmetric
Digital Subscriber Line |
| AGRAS |
Air-Ground
Radiotelephone Automated Service |
| AIOD
|
Automatic
Identification of Outward Dialed calls |
| AIN
|
Advanced
Intelligent Network (ANSI IN Standard) |
| A-key
|
Authentication
key |
| ALI |
Automatic
Location Information |
| AM |
Amplitude
Modulation |
| AMPS |
Advanced
Mobile Phone System |
| ANI
|
Automatic
Number Identification |
| ANS |
Advanced
Network Services |
| ANSI |
American
National Standards Institute |
| ANSI-41 |
ANSI
standard for mobile management (ANSI/TIA/EIA-41) |
| ANT |
ADSL
Network Terminator |
| AOA |
Angle
of Arrival |
| AOL |
America
On Line (ISP) |
| API |
Application
Programming Interface |
| APPC |
Advanced
Program-to Program Communications (IBM SNA) |
| APPN |
Advanced
Peer-to-Peer Network (IBM SNA) |
| ARCnet
|
Attached
Resource Computer Network (Datapoint) |
| ARDIS |
Advanced
Radio Data Information Service |
| ARP |
Address
Resolution Protocol |
| ARPA
|
Advanced
Research Projects Agency |
| ARPU |
Average
Revenue Per User |
| ARPANET |
ARPA
Network |
| ARQ
|
Automatic
Repeat Request |
| ARS
|
Automatic
Route Selection |
| ASCII
|
American
Standard Code for Information Interchange |
| ASIC |
Application-Specific
Integrated Circuit |
| ASN.1 |
Abstract
Syntax Notation 1 (ISO) |
| ASP |
Application
Service Provider |
| ASR |
Automatic
Send Receive, Automatic Speech Recognition |
| AT&T |
American
Telephone & Telegraph |
| ATIS
|
Alliance
for Telecommunications Industry Solutions (formerly
ECSA) |
| ATM |
Asynchronous
Transfer Mode, Automatic Teller Machine |
| ATSC |
Advanced
Television Systems Committee |
| AUI
|
Attachment
Unit Interface |
| AWG |
American
Wire Gauge |
| AXE
10 |
Series
of electronic telephone exchanges from L.M. Ericsson |
| B2B |
Business-to-Business
|
| B2C |
Business-to-Consumer
|
| B8ZS |
Binary
Eight Zero Substitution |
| BACP |
Bandwidth
Allocation Control Protocol |
| BBS |
Bulletin
Board System |
| Bellcore
|
Bell
Communications Research, Inc. (Now Telcordia) |
| BEP |
Back-End
Processor |
| BER |
Bit
Error Rate |
| BERT
|
Bit
Error Rate Test (or Tester) |
| BIOS |
Basic
Input-Output System |
| B-ISDN |
Broadband
ISDN |
| BOC
|
Bell
Operating Company (USA) |
| BONDING
|
Bandwidth
On Demand Interoperability Group |
| bps
|
bits
per second |
| BRI
|
Basic
Rate Interface (ISDN) |
| BS |
Base
Station |
| BSC
|
Base
Station Controller, or Binary Synchronous Communications
(IBM) |
| BSS |
Base
Station Sub-system (GSM) |
| BSS |
Business
Support Systems |
| BTS
|
Base
Transceiver Station |
| CAD |
Computer-Aided
Design |
| CAM
|
Computer-Aided
Manufacturing |
| CAMEL |
Customized
Applications for Mobile-network Enhanced Logic (GSM/ETSI) |
| CAN |
Campus
Area Network |
| CANARIE
|
Canadian
Network for Advancement of Research, Industry, Education
|
| CAP
|
Competitive
Access Provider |
| CAPS
|
Common
ISDN API Service |
| CARS
|
Cable
Antenna Relay Services |
| CASE |
Computer-Aided
Software Engineering |
| CATV |
Cable
Television or Community Antenna Television |
| CAVE |
Cellular
Authentication and Voice Encryption |
| CB |
Citizens
Band |
| CBR |
Constant
Bit Rate |
| CCC |
Clear
Channel Capability |
| CCCH
|
Common
Control Channel |
| CCD |
Charge
Coupled Device |
| CCIR
|
Comité
Consultatif International des Radiocommunications (now
ITU-R) |
| CCITT
|
Comité
Consultatif International des Télégraphes et Téléphones
(now ITU-T) |
| CCR
|
Customer
Controlled Reconfiguration |
| CCS
|
Common
Channel Signaling |
| CCSS6 |
Common
Channel Signaling System # 6 |
| CD-R
|
Compact
Disk-Recordable |
| CD-ROM |
Compact
Disk-Read-Only Memory |
| CDMA
|
Code
Division Multiple Access |
| CDO
|
Community
Dial Office |
| CDPD |
Cellular
Digital Packet Data |
| CDR |
Call
Detail Record |
| CENTREX |
Central
Office Exchange (PBX-like Service) |
| CEPT |
Conference
of European Posts and Telecommunications |
| CERN |
Centre
Européen de Recherche Nucléaire |
| CGSA |
Cellular
Geographic Service Areas |
| CIR |
Committed
Information Rate |
| CLASS |
Custom
Local Area Signaling Services |
| CLEC
|
Competitive
Local Exchange Carrier |
| CLI
|
Calling
Line Identification |
| CMA |
Communications
Management Association |
| CMIP |
Common
Management Information Protocol (ISO) |
| CMIS |
Common
Management Information Services (ISO) |
| CMISE |
Common
Management Information Service Element (ISO) |
| CMOS |
Complementary
Metal Oxide Semiconductors |
| CMRS
|
Commercial
Mobile Radio Service |
| CNET
|
Centre
National d'Études en Télécommunications (France Telecom)
|
| CNI |
Calling
Number Identification |
| CO |
Central
Office |
| Codec |
Coder/decoder
|
| CON
|
Concentrator
|
| COO |
Cell
of Origin |
| CORBA
|
Common
Object Request Broker Architecture (OMG) |
| COT
|
Central
Office Terminal |
| cPCI
|
Compact
Peripheral Component Interconnect |
| CPE
|
Customer
Premises Equipment |
| CPN |
Cisco
Powered Network (Ingredient Band) |
| CPP |
Calling
Party Pay |
| CPS
|
Cycles
per second (Hertz) |
| CPU
|
Central
Processing Unit |
| CRC |
Cyclic
Redundancy Check |
| CRM
|
Customer
Relationship Management |
| CSA |
Carrier
Servicing Area |
| CSM
|
Communications
Services Management |
| CSMA/CD |
Carrier
Sense Multiple Access with Collision Detection |
| CSR |
Customer
Service Representative
|
| CSU |
Channel
Service Unit |
| CT |
Cordless
Telecommunications |
| CTI
|
Computer
Telephony Integration |
| CTIA |
Cellular
Telecommunications Industry Association |
| Cu |
Copper
Local Loop |
| CUG
|
Closed
User Groups |
| D-AMPS |
Digital
Advanced Mobile Phone Service |
| DA |
Destination
Address |
| DAP |
Demand
Access Protocol |
| DARPA |
Defense
Advanced Research Projects Agency |
| DAT |
Digital
Audio Tape |
| dB |
deciBel
|
| DBMS |
Database
Management System |
| DBS |
Direct
Broadcast Satellite |
| DCE |
Data
Communications Equipment, or Distributed Computing Environment
|
| DCU |
Distribution
and Control Unit |
| DDD |
Direct
Distance Dialing |
| DDS |
Dataphone
Digital Service |
| DECT
|
Digital
Enhanced (formerly, European) Cordless Telecommunication
|
| DES |
Data
Encryption Standard |
| DLCS
|
Digital
Loop Carrier System |
| DLL |
Dynamic
Link Library |
| DLU |
Digital
Line Unit |
| DM |
Distributed
Management |
| DME |
Distributed
Management Environment (OSF) |
| DMI
|
Distributed
Management Interface |
| DMS |
Digital
Multiplex Switch (Nortel Networks Switching Product
Family DMS 100, 200, …) |
| DMT
|
Discrete
Multitone |
| DMTF |
Desktop
Management Task Force |
| DNA
|
Digital
Network Architecture (Digital Equipment Corporation)
|
| DNS |
Domain
Name Service DoD Department of Defense (USA) |
| DOS |
Disk
Operating System |
| DOV
|
Data
Over Voice |
| DPCM
|
Differential
Pulse Code Modulator |
| DS |
Digital
Service, Digital Signal |
| DS-0
|
Digital
Signal, Level 0 (64 kbps) |
| DS-1
|
Digital
Signal, Level 1 (1.544 Mbps) |
| DS-1C |
Digital
Signal, Level 1C (3.152 Mbps) |
| DS-2 |
Digital
Signal, Level 2 (6.312 Mbps) |
| DS-3
|
Digital
Signal, Level 3 (44.736 Mbps) |
| DS-4
|
Digital
Signal, Level 4 (274.176 Mbps) |
| DSI
|
Digital
Speech Interpolation |
| DSL
|
Digital
Subscriber Line |
| DSP |
Digital
Signal Processor |
| DSS |
Decision
Support System |
| DSU |
Digital
Service Unit |
| DTAM
|
Document
Transfer and Manipulation (ISO) |
| DTE |
Data
Terminal Equipment |
| DTMF |
Dual-Tone
MultiFrequency |
| DTU |
Data
Transfer Unit |
| DTV |
Digital
Television |
| DVB
|
Digital
Video Broadcasting |
| DWDM
|
Dense
Wavelength Division Multiplexing |
| DXI |
Data
Exchange Interface |
| E2E |
End-to-End |
| E-911
|
Enhanced
emergency telephone number (USA) |
| E&M |
Ear
and Mouth, or recEive and transMit (signaling) |
| E-TDMA
|
Expanded
Time Division Multiple Access |
| EAI |
Enterprise
Application Integration |
| EBCDIC |
Extended
Binary Coded Decimal Interchange Code (IBM) |
| EC
|
European
Community |
| ECMA |
European
Community Manufacturers Association |
| ECSA
|
Exchange
Carrier Standards Association (now ATIS) |
| EDGE |
Enhanced
Data for GSM Evolution |
| EDI
|
Electronic
Data Interchange |
| EEROM |
Electronically
Erasable Read-Only Memory |
| EF&I
|
Engineering,
Furnishing and Installation |
| EFT
|
Electronic
Funds Transfer |
| EHF
|
Extremely
High Frequency (more than 30 GHz) |
| EIA
|
Electronic
Industries Association |
| EIR |
Equipment
Identity Register |
| EISA
|
Extended
Industry Standard Architecture |
| EMEA |
Europe,
Middle East & Africa (Business Region) |
| EML/EMS
|
Element
Management Layer/ Element Management Service |
| EMS |
Enhanced
Messaging Services |
| ENS |
Enhanced
Network Services |
| EOT
|
End
of Transmission |
| EPI |
External
Provisioning Interface |
| ERMES
|
European
Radio Message System (standard for pagers) |
| ERP |
Enterprise
Resource Management |
| ESCON |
Enterprise
System Connection (IBM) |
| ESMR
|
Enhanced
Specialized Mobile Radio |
| ETSI
|
European
Telecommunications Standard Institute |
| EU |
European
Union |
| FASB
|
Financial
Accounting Standards Board (USA) |
| FAT
|
File
Allocation Table |
| FC |
Frame
Control, or Fiber Channel |
| FCAPS
|
Fault,
Configuration, Accounts, Performance, Security (ISO)
|
| FCC
|
Federal
Communications Commission (USA) |
| FCS
|
Frame
Check Sequence |
| FDD |
Frequency
Division Duplex |
| FDDI
|
Fiber
Distributed Data Interface |
| FDIC
|
Federal
Deposit Insurance Corporation (USA) |
| FDMMA
|
Frequency
Division Multiplexing Multiple Access |
| FEP |
Front-End
Processor |
| FHSS |
Frequency
Hopping Spread Spectrum |
| FIFO
|
First-In
First-Out |
| FITL
|
Fiber
In The Loop |
| FM |
Frequency
Modulation |
| FMS |
Fraud
Management System |
| FO
|
Fiber
Optic |
| FOD |
Fax
on Demand |
| FR |
Frame
Relay |
| FRAD |
Frame
Relay Access Device, or Assembler/ Disassembler |
| FRS |
Family
Radio Service |
| FSK |
Frequency-Shift
Keying |
| FSS |
Fixed
Satellite System |
| FTAM
|
File
Transfer, Access, and Manipulation (ISO) |
| FT1 |
Fractional
T1 |
| FTP
|
File
Transfer Protocol (TCP/IP) |
| FTS
|
Federal
Telecommunications System |
| FTTB |
Fiber
To The Building |
| FTTC |
Fiber
To The Curb |
| FTTK |
Fibre
To The Kerb |
| FTTH
|
Fiber
To The Home |
| FWA |
Fixed
Wireless Access |
| GAN |
Global
Area Network |
| GATT |
General
Agreement on Tariffs and Trade |
| Gb |
gigabit
|
| GB |
gigabyte
|
| GDS |
Generic
Digital Services |
| GEO |
Geostationary-Earth-Orbit |
| GHz |
gigaHertz
(billions of cycles per second) |
| GIS |
Geographic
Information System |
| GMRS |
General
Mobile Radio Service |
| GOSIP |
Government
Open Systems Interconnection Profile (USA) |
| GPRS
|
General
Packet Radio Service |
| GPS
|
Global
Positioning System |
| GRX |
GPRS
Roaming Exchange |
| GSA
|
General
Services Administration (USA) |
| GSM
|
Global
System for Mobile telecommunications, or Groupe Spécial
Mobile |
| GUI
|
Graphical
User Interface |
| GVPN
|
Global
Virtual Private Network |
| H0 |
High-capacity
ISDN channel operating at 384 kbps |
| H11
|
High-capacity
ISDN channel operating at 1.536 Mbps |
| H323 |
ANSI
standard for format over IP |
| HDLC |
High-level
Data Link Control (ISO) |
| HDSL
|
High-bit-rate
Digital Subscriber Line |
| HDTV
|
High-Definition
Television |
| HF |
High
Frequency (3 MHz to 30 MHz) |
| HFC
|
Hybrid
Fiber/Coax |
| HIC
|
Head-end
Interface Converter |
| HLR |
Home
Location Register |
| HomePNA
|
Home
Phoneline Networking Alliance |
| HPPI
|
High-Performance
Parallel Interface |
|
HTML
|
HyperText
Markup Language |
| HTTP |
HyperText
Transfer Protocol |
| HVAC |
Heating,
Ventilation, and Air Conditioning |
| Hz
|
Hertz
(cycles per second) |
| I/O |
Input/Output
|
| IA5 |
International
Alpha Set No. 5 |
| IAB
|
Internet
Architecture Board |
| IAC |
Install
And Commission |
| IANA
|
Internet
Assigned Numbers Authority |
| ICANN |
Internet
Corporation for Assigned Names and Numbers |
| ICI
|
Interexchange
Carrier Interface |
| ICMP
|
Internet
Control Message Protocol |
| ICR |
Intelligent
Call Routing |
| ICS |
Intelligent
Calling System ID Identification |
| IDDD |
International
Direct Dialing Designator |
| iDEN |
integrated
Dispatch Enhanced Network |
| IDPR |
Interdomain
Policy Routing |
| IEC |
International
Electrotechnical Commission, or InterExchange Carrier |
| IEEE |
Institute
of Electrical and Electronics Engineers |
| IESG |
Internet
Engineering Steering Group |
| IETF |
Internet
Engineering Task Force |
| ILEC
|
Incumbent
Local Exchange Carrier |
| IM
|
Instant
Messaging |
| IMAP |
Internet
Mail Access Protocol (IETF) |
| IMEI |
International
Mobile Equipment Identity |
| IMN |
Intelligent
Mobile Network |
| IMT-2000 |
International
Mobile Telecommunications 2000 (ITU) |
| IMSI |
International
Mobile Subscriber Identity |
| IN
|
Intelligent
Network |
| IN7
|
Compaq
SS7 stack (previously DECss7) |
| INAP |
Intelligent
Network Application Part (IN) |
| INMS
|
Integrated
Network Management System |
| INTELSAT |
International
Telecommunications Satellite Organization |