Printer-friendly version
Glossary for the entire site, across all courses and subjects.



Currently sorted By last update ascending Sort chronologically: By last update change to descending | By creation date

Page: (Previous)   1  ...  3  4  5  6  7  8  9  10  11  12  ...  18  (Next)
  ALL

:
Also known as: WAP identity module WIM (WAP identity module) is a security module that provides a more secure environment when using WAP related applications and services on a mobile device via a WAP gateway. A WIM allows the user to store certificates and digital signatures
:
Also known as: WAP WAP (Wireless Application Protocol) is a common global standard, which defines the way in which Internet communications and advanced non-voice services are provided on wireless mobile devices, such as digital mobile phones and Personal Digital Assistants. The current version of this protocol is WAP 2.0, and it is fast becoming the standard way for mobile devices to access Internet services, by communicating with a server installed in the mobile phone network. A mobile device can therefore combine telephony services with the limited capacity of mobile terminal displays, and so provide the user with a microbrowser. A WAP enabled phone provides interactive access to the Internet, and to services such as online news and information, e-commerce transactions, online banking, e-mail messaging, Internet Relay Chat (IRC), and a host of new services still in development. Subscribers use WAP to access websites and pages that have been converted for WML (Wireless Markup Language), which are stripped down to their basic text format, and this is more suitable for the limited display capabilities of mobile devices. WAP works with multiple standards and is supported by most modern mobile networks, such as GSM, GPRS, and UMTS, and in the future equipment and networks that use WAP will be more compatible, regardless of the manufacturer. WAP is the mobile equivalent of HTTP (HyperText Transfer Protocol), and has been developed through the cooperation of the world's major telecommunications and software companies, their activities being co-ordinated through the WAP Forum. The WAP Forum has a website at www.wapforum.org. Some manufacturers claim that their handsets have WAP 2.0 browsers; this is often a re-branding of an XHTML-MP browser, the version number representing XHTML replacing WML for mobile content markup. An alternative system standard to WAP is i-Mode
:
Wireless Phone is another name for a mobile phone. The word 'wireless' refers to the fact that the phone is actually a small radio transceiver, which communicates with the mobile telephone network by transmitting and receiving radio signals through the air without using wires. Although the various types of mobile phone, cell (cellular) phones, and car phones are all wireless devices, the cordless phones used at home are not considered wireless, as their base units are connected by wires to the network
:
Also known as: Java 2 Platform, Java Micro Edition, K Java J2ME (Java 2 Platform, Micro Edition or K Java) is a software and technology environment that has been specifically designed to enable the development of applications optimised for use on mobile and portable consumer devices, such as mobile phones and personal digital assistants (PDAs). J2ME is able to run on devices with RAM of only 128 kB, and this allows programmers to use the Java programming language (and related tools) to develop software for devices with limited memory. A wide range of applications and games are now available for use on mobile devices. J2ME was developed by Sun Microsystems
:
Java is an object oriented language created by Sun Microsystems in the mid-nineties to provide an open and machine independant platform to develop applications on. The original driving force behind Java was the need to write application code for web applications that could be downloaded via a browser and then executed on a client, regardless of its operating system, be it Windows, Mac, Unix, Symbian or anything else. Java has since grown extensively as more uses have been found for such a versatile language and more platforms have been brought into existence. Thousands of different constructs (for example "collections" and "frameworks") have been created and built into the Java language itself, making the language extremely adaptable. Java has even been used to write entire operating systems. The key part of Java that allows it to be run on on such a diverse range of hardware and operating systems is the JVM, or Java Virtual Machine. This is in effect a program that acts as a virtual computer which can understand Java; Java programs are then run on this virtual machine. Java tends to occur in the mobile telecommunications industry in two common forms - J2ME (Java 2 Micro Edition), which is the set of Java objects and interfaces available on mobile platforms such as phones; and downloadable Java applications (most commonly Java games) which are developed by software houses and then installable over the air by any handset user. The definitive resource on Java is at java.sun.com
:
Also known as: J2ME, Java Micro Edition, K Java J2ME (Java 2 Platform, Micro Edition or K Java) is a software and technology environment that has been specifically designed to enable the development of applications optimised for use on mobile and portable consumer devices, such as mobile phones and personal digital assistants (PDAs). J2ME is able to run on devices with RAM of only 128 kB, and this allows programmers to use the Java programming language (and related tools) to develop software for devices with limited memory. A wide range of applications and games are now available for use on mobile devices. J2ME was developed by Sun Microsystems
:
Java Games are simple arcade style games, written in the Java language, that are designed to run on a mobile phone. A phone that supports Java applications will be able to run Java games, and these may be downloaded easily and quickly from a number of web sites, usually for a fee, although some sites provide Free Online Games. The games are stored in the internal memory of the phone
:
J2ME (Java 2 Platform, Micro Edition or K Java) is a software and technology environment that has been specifically designed to enable the development of applications optimised for use on mobile and portable consumer devices, such as mobile phones and personal digital assistants (PDAs). J2ME is able to run on devices with RAM of only 128 kB, and this allows programmers to use the Java programming language (and related tools) to develop software for devices with limited memory. A wide range of applications and games are now available for use on mobile devices. J2ME was developed by Sun Microsystems
:
Also known as: JPEG JPEG (Joint Photographic Experts Group) is an independant organisation formed in the mid eighties with the aim of creating true colour computer image standards. The initiative to develop a photographic image format was initially taken on by the ISO but other groups were merged (including the ITU-T) in order to take advantage of their experience. The standard most commonly referred to by the term JPEG is ISO/IEC IS 10918-1, which defines techniques for digitally coding photographic images. There is an extension of this standard called JFIF (JPEG File Interchange Format) which is the standard commonly used for almost all JPEG image files. JPEG can be used to store either truecolour (24-bit) or greyscale images. It uses a lossy compression algorithm called DCT (Discrete Cosine Transform) which is a lot more complex than normal bitmap encodings and so requires more computing power to encode or decode; the benefit is that good image quality can be acheived with a small file. DCT in JPEGs works best on photographic images; graphics that contain sharp contrasts such as straight edges don�??t compress so well. Being a lossy compression method, it is possible to have manual control over the balanace between the quality and file size of JPEG-coded images. There has been demand for JPEG images that employ lossless compression as the basic standard does not define it very clearly or thoroughly. The JPEG-LS standard (ISO/IEC IS 14495-1) has been developed by the Joint Photographic Experts Group to help increase the quality and integration of lossless compression. The JPEG standard is heavily supported by the open source movement, and the good accessibility of JPEG coding and decoding packages has helped its rapid adoption into the mainstream in the mid nineties.
:

Call barring is a mobile phone feature that allows the user to set certain prohibitions on incoming or outgoing calls. This is an effective means to prevent the phone being used to make expensive international or premium rate calls, particularly when the phone is to be used by people other than the subscriber.

Many companies that provide for business use now employ call barring as a security measure, to control their use and restrict calls to pre-approved numbers. The user's personal code must be used to activate this feature

Keyword(s):
:

Call deflection is a selective call divert that allows a call to be forwarded without accepting it. Call deflection can either be invoked automatically by the mobile station, or by a network interaction. It is only supported within an ISDN call environment, and will only work as long as no call forwarding or divert limits have been met. Calls can be deflected to different numbers depending on the caller’s number, discovered by CLIP.
Keyword(s):
:

Call divert is a�handset feature that allows the user to forward or redirect all incoming calls to an alternate�number (fixed or mobile), or to voicemail. This is a facility with many advantages, enabling the user to be called on another phone or at a particular location, to have calls answered by somebody else, or to use a voicemail answering service. When this feature is activated the�number from which calls are forwarded will not ring or receive calls. Various options may be available to the user, allowing them to choose different phone numbers to divert to, depending on the circumstances. For example, calls may be diverted to one number when engaged (busy transfer), but another number or voicemail when the phone is switched off or the network unavailable.
Keyword(s):
:

Call holding is a phone feature that allows the user to put an ongoing call on hold, while at the same time making or receiving a second call on the same phone.

The person 'on hold' will not be aware of what the other party is doing during the call holding period, and they may be presented with silence or hear pre-recorded music and reassuring messages. This feature is convenient when a user needs to talk with two parties who should not talk directly (i.e. a conference call is not possible), which might arise when a mortgage broker is setting up a deal between a bank and a mortgager.

Call holding can also be used in conjunction with call waiting to allow two calls to be handled at once, so ensuring that important incoming calls are not missed.
Keyword(s):
:

Call barring is a mobile phone feature that allows the user to set certain prohibitions on incoming or outgoing calls. This is an effective means to prevent the phone being used to make expensive international or premium rate calls, particularly when the phone is to be used by people other than the subscriber.

Many companies that provide handsets for business use now employ call barring as a security measure, to control their use and restrict calls to pre-approved numbers. The user's personal code must be used to activate this feature.
Keyword(s):
:

Call return is a network service that allows a user to discover the number of the last person who called their phone. The service is activated by dialling a code, e.g. 1471 in the UK or *69 in the USA, and the number then provided will enable the user to return the call.

Call return is part of a general phone feature referred to as Calling Line Identity.

Keyword(s):
:

Call transfer is a mobile phone feature that allows the user to transfer a caller to another phone number. Either party in a phone call can dial a number and then exit from the connection, so leaving the other party ringing the new number.
Keyword(s):
:

Also known as: CW
Call waiting is a phone feature that allows the user to be alerted, while they are engaged in an active call, that another incoming caller is trying to contact them.

Depending on the type of mobile phone, the user might be given an audible 'beeping' warning, or a message on their phone's display screen. This facility gives the user the option of finishing the first call before answering the second one, or alternatively the user could take advantage of call holding to keep the first call 'on hold' while the second caller is dealt with. Other options might be to reject the waiting call, or to send it to the voice mail service.
Keyword(s):
:

Caller group logo is used as a means of identifying either individual callers, or members of specific caller groups.

Caller group logos usually come preloaded with a mobile phone, and are saved by the user under caller groups, or individual callers; they are then displayed whenever that individual user (or a member of the selected group) calls.
Keyword(s):
:
CLIP (Calling Line Identification Presentation) is a supplementary GSM service used to show the number of a caller. When a call is initiated, the caller’s MSC provides the destination MSC with the caller’s identity. The destination MSC then checks to see if the phone being called has subscribed to CLIP. If it has, then the caller’s identity is presented. CLIP couples with CLIR to provide an advanced version of caller line identification in GSM networks.

The presence of CLIP - and CLI generally - can be very useful for choosing to forward or even discard calls from certain people or organisations, as it allows identification of the caller without answering.
Keyword(s):
:
Also known as: CLIR

CLIR (Calling Line Identification Restriction) controls the presentation of caller identity (via CLIP) in GSM networks. If CLIR is enabled, the caller’s MSC indicates this restriction to the destination MSC. The identity is then not forwarded to the destination mobile station.

There is a GSM override function for the CLIR that is available to organisations such as the police, and allows the caller ID to be seen even if they have elected to restrict their identity.
Keyword(s):

Page: (Previous)   1  ...  3  4  5  6  7  8  9  10  11  12  ...  18  (Next)
  ALL