AAA

Authentication, Authorisation and Accounting

AAL

ATM Adaptation Layers

AAR

Automatic Alternative Routeing

AC

Alternating Current

ACD

Automatic Call Distribution

A/D

Analogue-to-Digital (conversion)

ADM

Add-Drop Multiplexor

ADSL

Asymmetric Digital Subscriber Line

AESA

ATM End-System Addresses

AFI

Authority and Format Indicator

AM

Amplitude Modulation

AMPS

Advanced Mobile Phone System

AP

Access Point

API

Application Programming Interface

APS

Automatic Protection Systems

APON

ATM over Passive Optical Network

ARP

Address Resolution Protocol

ARPANET

US defence department project: the forerunner of the Internet

AS

Autonomous System

ATM

Asynchronous Transfer Mode

AU

Administrative Unit

AUC

Authentication Centre

BHCA

Busy Hour Call Attempts

B-ISUP

Broadband ISDN User Part

BORSCHT

Battery, Over-load protection, Ringing, Supervision, Codec, Hybrid, Test

BPON

Broadband Passive Optical Network

BRA

Broadband Radio Access

BS

Base Station

BSC

Base Station Controller

BSI

British Standards Institute

BTC

Base Transmitter Controller

BTS

Base-Transceiver Station

C7

see SS7

CAS

Channel-associated signalling

CATV

Community Antenna TeleVision

CB

Citizen's Band (radio)

CBR

Constant Bit Rate

CCS

Common Channel Signalling

CDM

Code Division Multiplex

CDMA

Code Division Multiple Access

CDPD

Cellular Digital Packet Data

CEPT

Conf rence Europ enne des administrations des Postes et des T l communications

CER

Cell-Error Ratio

CIDR

Classless Inter-Domain Routeing

CG

Charge Group

CLI

Caller Line Identification

CM

Connection Memory

CN

Communication Network

COS

Class Of Service

CPE

Customers Premises Equipment

CPU

Central Processing Unit

CSMA/CA

Carrier-Sense Multiple-Access/Collision Avoidance

CSMA/CD

Carrier-Sense Multiple-Access/Collision Detection

CTD

Cell Transfer Delay

CTS

Core Transmission Station

D-AMPS

Digital-Advanced Mobile Phone System

Datel

Data over Telephone

DC

Direct Current

DCC

Data Country Code

DDF

Digital...