Glossary terms beginning with A

A-GPS

Assisted GPS A-GPS is used to speed up start-up times of GPS-based positioning systems GPS may have problems getting a lock when the signal is weak and in such a case A-GPS would assist in getting...

A2DP

A2DP is used for streaming stereo music wirelessly to headphones or speakers over Bluetooth. Unlike other Bluetooth profiles (Headset and Handsfree), A2DP is one-way only and streams a stereo signal.

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 /…

AAC

AAC is a file format for storing digital audio It's commonly used for storing music on the Internet PCs and portable music players and phones It is similar to MP3 but it was designed to be its...

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…

Accelerometer

The accelerometer is a built-in electronic component that measures tilt and motion It is also capable of detecting rotation and motion gestures such as swinging or shaking The most common use for...

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,…

Airplane mode

Please refer to Flight mode.

Alarm Clock

This is a feature allowing a mobile phone to act like a common alarm clock but with more flexibility Currently all mobile phones offer this functionality with varying feature sets For example...

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…

AMOLED

AMOLED is an emerging display technology used in portable devices like mobile phones Active-matrix OLED displays provide the same performance as their passive-matrix OLED counterparts but they...

AMOLED display

AMOLED is an emerging display technology used in portable devices like mobile phones Active-matrix OLED displays provide the same performance as their passive-matrix OLED counterparts but they...

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…

Analog

A method of transmitting information using energy waves It doesn't have discrete levels but is a continuously variable wave Human voice for example is transferred by directly converting the sound...

Android

Android is a Linux-based smartphone operating system and software platform created by Google The Android platform is supported by the Open Handset Alliance and is open source Any manufacturer can...

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…

ANT+

ANT is a wireless protocol for exchanging data over short distances from fixed and mobile devices creating personal area networks ANT is an ultra low power protocol that is able to operate off of...

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…

APN

APN is the name (web address) of an access point for GPRS/EDGE/UMTS data connection. Usually wireless carriers provide the APN to their end users.

Apple iOS

Previously iPhone OS Apple's iOS is the company's own mobile operating system developed and originally released on the Apple iPhone and the Apple iPod Touch back in 2007 Several years later it was...

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…

Audio jack

A common connector for plugging in a standard pair of music headphones such as the ones found on music players computers and most other electronic devices with audio outputs It can support stereo...

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…

Auto-focus

Auto-focus is a feature of digital cameras that allows them to focus correctly on a subject It enhances the quality of the photo over fixed-focus cameras and allows for close-ups or the even closer...

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…

AVRCP

AVRC is a Bluetooth profile that allows remote control of media playback on other devices Supported functions are play pause stop next and previous It is usually coupled with A2DP so that for...