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A B C D E F G H I J L M N O P Q R S T U V W X _

Glossary search:

TermDescription

A-bis

A-bis - Interface between the BSC and BTS in a GSM network

A-interface

A-interface - Interface between the MSC and BSS in a GSM network

A-TDMA

A-TDMA - Advanced Time Division Multiple Access

A5/1/2/3/8X

A5/1/2/3/8X - Encryption algorithms for GSM networks

AAL

AAL - ATM Adaptation Layer

AB

AB - Access Burst; used for random access and characterised by a longer guard period to allow for burst transmission from a MS that does not know the correct timing advance when first contacting a network

ABR

ABR - Available Bit Rate

ACTE

ACTE - Approvals Committee for Terminal Equipment

ACTS

ACTS - Advanced Communications Technologies and Services – a European technology initiative

ACU

ACU - Antenna Combining Unit

ADPCM

ADPCM - Adaptive Differential Pulse Code Modulation; a form of voice compression that typically uses 32kbit/s

Advice of charge

Advice of charge - A service which provides the user with information on the cost of calls from a mobile phone

AFC

AFC - Automatic Frequency Control

AGCH

AGCH - Access Grant Channel; downlink only, BTS allocates a TCH or SDCCH to the MS, allowing it access to the network

Air interface

Air interface - In a mobile phone network, the radio transmission path between the base station and the mobile terminal

Airtime

Airtime - The amount of time a subscriber spends using his/her mobile phone

Alarm

Alarm - An alarm feature which can be set for a specific time and date or can used as a daily alarm.If the phone has a calendar feature, the alarm feature may be integrated with that (in some Motorola phones for example), so an alarm is simply a calendar event. Although some phones with a calendar feature also have a separate alarm feature.

Alphanumeric Display

Alphanumeric Display - A display capable of containing letters and numbers, but not graphics.

AM

AM - Amplitude Modulation

AMPS

AMPS - Advanced Mobile Phone System, the analogue mobile phone technology used in North and South America and in around 35 other countries. Operates in the 800MHz band using FDMA technology

AMR

AMR - Adaptive Multi-Rate codec. Developed in 1999 for use in GSM networks, the AMR has been adopted by 3GPP for 3G

Analogue

Analogue - The representation of information by a continuously variable physical quantity such as voltage

ANSI

ANSI - American National Standards Institute. An non-profit making US organisation which does not carry out standardisation work but reviews the work of standards bodies and assigns them category codes and numbers

ANSI-136

ANSI-136 - See D-AMPS

AoC

AoC - Advice of Charge

API

API - Application Program Interface

ARIB

ARIB - Association of Radio Industries and Businesses. An organisation established by Japan’s Ministry of Posts and Communications to act as the standardisation authority for radio communication and broadcasting

ARPU

ARPU - Average Revenue Per User

ASCII

ASCII - American Standard Code for Information Interchange

ASIC

ASIC - Application Specific Integrated Circuit

ASP

ASP - Application Service Provider

Asymmetric Transmission

Asymmetric Transmission - Data transmissions where the traffic from the network to the subscriber is at a higher rate than the traffic from the subscriber to the network

ATM

ATM - Asynchronous Transfer Mode; a multiplexed information transfer and switching method in which the data is organised into fixed length 53-octet cells and transmitted according to each application’s instantaneous need

AUC

AUC - Authentication Centre; the element within a GSM network which generates the parameters for subscriber authentication

 

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