Glossary terms beginning with A

A2DP Stereo Audio Profile

A2DP is the abbreviation of Advanced Audio Distribution Profile. A2DP is a Bluetooth profile with which hifi-stereo sounds can be transmitted through a wireless Bluetooth-connection. A Bluetooth-profile is a different name for the specific application…

A5

A5 is the encryption algorithm commonly used by GSM networks in Europe. It has a 64-bit key, although in practice at least ten of these bits are unused. A weaker version of A5 called A5 /…

Abandoned call

Abandoned call is one in which a connection is made with the recipient, but the caller then decides to terminate the call before any proper communication is established. Organisations usually wish to keep abandoned calls to…

AC Wall Charger

AC Wall Charger is an essential accessory for use with mobilephones and other electronic devices. The charger enables the mobile device to be powered, and for its battery to be recharged, by connecting it to a…

Access Grant Channel

Also known as: AGCH Access Grant Channel (AGCH) is a downlink channel (base to mobile) used by a BS (Base Station) to tell the MS (Mobile Station) which DCCH (Dedicated Control Channel) to use, after the…

ACELP

Also known as: Algebraic Code Excited Linear Prediction Algebraic Code Excited Linear Prediction, or ACELP, is a speech compression system, used to provide a good standard of speech quality when the network is operating at low…

Active matrix

Also known as: Thin Film Transistor, TFT TFT (Thin Film Transistor or Active Matrix) LCD is a mass produced display technology that offers improved refresh rates and good contrast over passive matrix displays. It achieves this…

Adaptive Differential Pulse Code Modulation

Also known as: ADPCM Adaptive Differential Pulse Code Modulation (ADPCM) is a compression / decompression technique, used for converting analogue sound or data into a string of digital binary code. Frequent samples are taken of the…

ADPCM

Also known as: Adaptive Differential Pulse Code Modulation Adaptive Differential Pulse Code Modulation (ADPCM) is a compression / decompression technique, used for converting analogue sound or data into a string of digital binary code. Frequent samples…

ADSL

Also known as: Asymmetric Digital Subscriber Line Asymmetric Digital Subscriber Line (ADSL) is a technology allowing high rates of digital data to be sent over conventional twisted-pair copper telephone lines. It is referred to as asymmetric…

Advanced Mobile Phone Service

Also known as: AMPS Advanced Mobile Phone Service (AMPS) is a first generation analogue cellular telephone system that originated in the USA in the 1980s. AMPS is still the most widely deployed cellular system in the…

aerial

Also known as: antenna The antenna (or aerial) is the physical part of a mobile phone that is designed to receive or transmit the radio frequency signals, which the handset uses to communicate with the telephone…

AGCH

Also known as: Access Grant Channel Access Grant Channel (AGCH) is a downlink channel (base to mobile) used by a BS (Base Station) to tell the MS (Mobile Station) which DCCH (Dedicated Control Channel) to use,…

Algebraic Code Excited Linear Prediction

Also known as: ACELP Algebraic Code Excited Linear Prediction, or ACELP, is a speech compression system, used to provide a good standard of speech quality when the network is operating at low data rates (i.e. narrow…

Alphanumeric

Alphanumeric is a term referring to information that contains a combination of alphabetic letters or words (alphas) and numbers (numerics). Punctuation and other symbols are also usually interpreted to be included in the term alphanumeric. Alphanumeric…

American Standard Code for Information Interchange

Also known as: ASCII The American Standard Code for Information Interchange (ASCII) is a standard coding system developed by the USA Standards Institute. ASCII is universally used to represent letters, numbers, punctuation marks, symbols and control…

AMPS

Also known as: Advanced Mobile Phone Service Advanced Mobile Phone Service (AMPS) is a first generation analogue cellular telephone system that originated in the USA in the 1980s. AMPS is still the most widely deployed cellular…

Animated screensaver

Animated screensaver is a changing pattern or animation, which replaces the original screen image when a mobile phone has been idle for a predetermined period of time. The use of a screensaver is designed to prevent…

Animation

Animation is a moving image produced by sequentially displayed image frames, which creates the illusion of movement. Mobile phone animations usually consist of short, animated greetings and messages in a variety of sizes, colours, and levels…

Answering machine

Answering machine is a device that automatically answers a telephone call when the recipient is for some reason unable to answer it personally. Typically, a user stores an outgoing message to tell callers that the phone…

antenna

Also known as: aerial The antenna (or aerial) is the physical part of a mobile phone that is designed to receive or transmit the radio frequency signals, which the handset uses to communicate with the telephone…

ASCII

Also known as: American Standard Code for Information Interchange The American Standard Code for Information Interchange (ASCII) is a standard coding system developed by the USA Standards Institute. ASCII is universally used to represent letters, numbers,…

Asymmetric Digital Subscriber Line

Also known as: ADSL Asymmetric Digital Subscriber Line (ADSL) is a technology allowing high rates of digital data to be sent over conventional twisted-pair copper telephone lines. It is referred to as asymmetric because it provides…

Audible Keypad Tone

Audible Keypad Tone is a facility that can be set on some handsets, which causes them to play a tone when the keys are pressed, so confirming that they have operated correctly. This was introduced to…

Auto focus

Auto focus is a function on a camera to automatically focus an object. Auto focus happens by measuring the difference in contrast between two points that are positioned next to each other. If the reciprocal…

Automatic answer

Automatic answer is a phone feature that allows a recipient to answer a call without the need to press any keys. Once the phone has started to ring the conversation can be started immediately, because the…

Automatic backlight

Automatic backlighting means that touching any key will illuminate the display and keypad for ease of viewing. The backlight will turn itself off automatically after a preset period, so avoiding excessive drain on the battery. This…

Automatic redial

Automatic redial is a feature designed to make it easier to dial numbers that are engaged. After the dialled number is found to be engaged, the phone will either repeatedly redial the number automatically, or it…