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Abbreviations
Glossary
Standards
ACD - Automatic Call Distribution
ADC - Analogue to Digital Convertor
ADSL - Asymmetrical Digital Subscriber Line
ADPCM - Adaptive Differential Pulse Code Modulation
ANI - Automatic Number Identification
ARS - Automatic Route Selection
ASCII - American Standard Code for Information Interchange
ATM - Asynchronous Transfer Mode
BER - Bit Error Rate
BHCC - Busy Hour Call Completions
BRA/BRI - ISDN Basic Rate Access/Interface
BTNR - BT Network Requirement
CCS - Centi-Call Seconds
CCITT - Comité Consultatif International Télégraphique et Téléphonique
CDR - Call Detail Recording (or Record)
CMS - Call Management System
CO - Central Office
CoS - Class of Service
CPE - Customers' Premises Equipment
CRC - Cyclic Redundancy Check
DAC - Digital to Analogue Convertor
DACS - Digital Access Carrier System
DASS - Digital Access Signalling System
DCE - Data Communications Equipment
DDI - Direct Dialling In
DECT - Digital Enhanced Cordless Telecommunications
DID - Direct Inward Dialling
DND - Do Not Disturb
DNIS - Dialled Number Identification Service
DNS - Domain Name System
DPNSS - Digital Private Network Signalling System
DTE - Data Terminal Equipment
DTMF - Dual-Tone Multi-Frequency
DTT - Digital Terrestrial Television
DVB - Digital Video Broadcasting
EDGE - Enhanced Data rates for GSM Evolution
EDI - Electronic Data Interchange
FDM - Frequency Division Multiplex
FX - Foreign Exchange
GPRS - General Packet Radio Service
GSM - Global System for Mobile communications
HSDPA - High Speed Downlink Packet Access
HSUPA - High Speed Uplink Packet Access
IC - Integrated Circuit
IDC - Insulation Displacement Connection/Connector
INMARSAT - International Maritime Satellite Organization
INTELSAT - International Telecommunications Satellite Organization
IMS - IP Multimedia Subsystem
IP - Internet Protocol
ISDN - Integrated Services Digital Network
ISO - International Standards Organisation
ISP - Internet Service Provider
ITU - International Telecommunications Union
IVR - Interactive Voice Response
LAN - Local Area Network
LASER - Light Amplification by the Stimulated Emission of Radiation
LEC - Local Exchange Carrier
LED - Light-Emitting Diode
LLU - Local Loop Unbundling
LTE - Long-Term Evolution
MAC - Media Access Control
MACs - Moves, Adds & Changes
MMS - Multimedia Messaging Service
MPLS - Multi Protocol Label Switching
NAT - Network Address Translation
NCoP - Networking Code of Practice
NSE - Night Service Extension
NTE - Network Termination Equipment
OSI - Open Systems Interconnection
PABX - Private Automatic Branch Exchange
PBX - Private Branch Exchange
PC - Personal Computer
PCM - Pulse Code Modulation
PDH - Plesiochronous Digital Hierarchy
PPP - Point-to-Point Protocol
PPPoA - PPP over ATM
PPPoE - PPP over Ethernet
PRA/PRI - ISDN Primary Rate Access/Interface
PSTN - Public Switched Telephone Network
PTO - Public Telecommunications Operator
QoS - Quality of Service
RADIUS - Remote Authentication Dial-In User Service
RAID - Redundant Array of Inexpensive Disks
RAM - Random Access Memory
RISC - Reduced Instruction Set Computer
ROM - Read-Only Memory
SAR - Specific Absorption Rate
SCSI - Small Computer System Interface
SDH - Synchronous Digital Hierarchy
SDSL - Symmetrical Digital Subscriber Line
SFP - Small Form-Factor Pluggable
SIP - Session initiation Protocol
SMDR - Station Message Detail Recording
SMS - Short Message Service
SPC - Stored Program Control
T&M - Time and Materials
TCP - Transmission Control Protocol
TDM - Time Division Multiplex
ToS - Type of Service
UDP - User Datagram Protocol
UMTS - Universal Mobile Telecommunications System
UPS - Uninterruptible Power Supply
VoIP - Voice over Internet Protocol
VPN - Virtual Private Network
WAN - Wide Area Network
WAP - Wireless Application Protocol
WATS - Wide-Area Telephone Service
Page updated 28/12/2009