Friday, April 29, 2011

Basic GSM abbreviations and acronyms

GSM - Global System for Mobile Communications
GPRS - General Packet Radio Service
CDMA - Code division multiple access 
W-CDMA - Wideband Code Division Multiple Access 
SIM - subscriber identity module
WAP - Wireless Application Protocol 
SMS - Short Messaging System
3G (or 3-G) - is short for third-generation technology.

Other technical terms:

IC - Intergrated Circuit
UEM - Universal Energy Module
PPM - Phone Permanent Memory
MCU - Micro Controller Unit
PM - Permanent Memory
COBBA IC - Common Base Band Analog (as per Hitek's knowledge)

How About this?
UFS- Universal Flasher Software
JAF - Just Another Flasher

Parts Acronyms 

 - Electronically Erasable Programmable Memory
UEM - Universal Energy Management
UPP - Universal Phone Programmer
RAM - Random Access Memory
SRAM - Syncronous Random Access Memory
COBBA- Common Baseband Analog
CCONT- Current CONTroller
MAD - Memory Analog Digital
and also the extensions...
MCU - Micro Control Unit
PP- Product Profile
PM- Permanent Memory
CNT- Content
VCO.................Voltage Control Oscillator
DSP.................Digital Signal Processor
BGA.................Ball Grid Array
EEPROM...........Electronically Erasable Programmable ROM

some more glossary...

ACCH (Analog Control Channel)
AMPS (Advanced Mobile Phone Service)
ASIC (Application Specific Integrated Circuit) 
Electronic chips designed for some concrete purposes (for example, in phone it controlls communication between MCU and DSP) They're designed and produced by the companies which use them. 
AVCH (Analog Voice Channel)
BCC (Base-station Color Code)
BSC (Base Station Controller)
BSIC (Base Station Identity Code or Base transceiver Station Identity Code)
BTS (Base Transceiver Station)

This device allows communication between phones and cellular network
C1 (path loss-criterium)
RX Strength of signal received 
RxLevAm (Rx Level Access minimum) 
MSTxPwr - Max power, which can be transmitted by phone to get access 
MSMaxTxPwr - Max permissible transmission power of the phone 
C2 (cell-reselection criterion)
CDMA (Code Division Multiple Access; also known as IS-95)
One of the newer digital technologies in 800 or 1900 Mhz. Used in North America, Australia and some southeastern Asian countries (e.g. Hong Kong and South Korea). It doesn't divide the radio frequency spectrum into separate user channels by frequency slices or time slots, but separates users by assigning them digital codes within the same broad spectrum. 
DCCH (Digital Control Channel)
DTCH (Digital Traffic Channel)
DTX (Discontinous Transmission Exchange)
FDMA (Frequency Division Multiple Access)
This name means multiaccess on frequency field: transmission proceeds on different frequencies at the same time (this is a "full duplex" connection): there is a “down-link” from BTS to the phone and “up-link” - from the phone to BTS (this is called "up" and "down" because BTS antennas are usually higher than phone ones, so the signal from BTS to the phone really must go down (and vice versa)). 
GSM (Global System for Mobile Communication) 
Cellular telecommunication system working at 900 MHz. It also has a 1800 MHz (DCS) and 1900 MHz (PCS) version
HLR (Home Location Register
IMEI (International Mobile Equipment Identification code) 
IMSI (International Mobile Subscriber Identify)
MSC (Mobile Switching Center) 
NCC (National Color Code or Network Color Code)
PLMN (Public Land Mobile Network) 
PLU (Periodic Location Update)
TCH (Traffic Channels) 
HR (Half Rate Traffic)
FR (Full Rate Traffic)
EFR (Enhanced Full Rate)
TDMA (Time Division Multiple Access) 
This means multiaccess in time: several phones can transmit signal (either digitized voice or computer data) in the same time on the same channel 
TMSI (Temporary Mobile Subscriber Identity)
VLR (Visitor Location Register)
SRAM- syncronous random access memory tama ba ko?
MCU -micro control unit

The first generation of analogue mobile phone technologies including AMPS, TACS and NMT

The second generation of digital mobile phone technologies including GSM, CDMA IS-95 and D-AMPS IS-136

The enhancement of GSM which includes technologies such as GPRS

The third generation of mobile phone technologies covered by the ITU IMT-2000 family
The 3rd Generation Partnership Project, a grouping of international standards bodies, operators and vendors with the responsibility of standardising the WCDMA based members of the IMT-2000 family

The counterpart of 3GPP with responsibility for standardising the CDMA2000-based members of the IMT-2000 family. 3GPP2 is spearheaded by ANSI

Octantal Phase Shift Keying

Encryption algorithms for GSM networks

ATM Adaptation Layer

Available Bit Rate

Interface between the BSC and BTS in a GSM network

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

Approvals Committee for Terminal Equipment

Advanced Communications Technologies and Services – a European technology initiative

Antenna Combining Unit

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


Automatic Frequency Control

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

Air interface

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

Interface between the MSC and BSS in a GSM network

Amplitude Modulation

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

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

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

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


Application Program Interface

Advice of Charge

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

Average Revenue Per User

American Standard Code for Information Interchange

Application Specific Integrated Circuit

Application Service Provider

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

Advanced Time Division Multiple Access

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

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


A term meaning both the width of a transmission channel in terms of Hertz and the maximum transmission speed in bits per second that it will support

Broadcast Channels; carry only downlink information and are mainly responsible for synchronisation and frequency correction (BCCH, FCCH and SCH)

Broadcast Control Channel; the logical channel used in cellular networks to broadcast signalling and control information to all mobile phones within the network

Broadband Code Division Multiple Access

Broadband ISDN

Bit Error Rate; the percentage of received bits in error compared to the total number of bits received

Bit Error Rate Test

A bit is the smallest unit of information technology. As bits are made up using the binary number system, all multiples of bits must be powers of two i.e. a kilobit is actually 1024 bits and a megabit 1048576 bits. Transmission speeds are given in bits per second (bit/s)

A low power, short range wireless technology designed to provide a replacement for the serial cable. Operating in the 2.4GHz ISM band, Bluetooth can connect a wide range of personal, professional and domestic devices such a laptop computers and mobile phones together wirelessly.

Busy Hour Call Attempts; the number of call attempts made during a network’s busiest hour of the day

Base Station Controller; the network entity controlling a number of Base Transceiver Stations

Base Station System/Subsystem

Base Transceiver Station; the network entity which communicates with the mobile station

Common Air Interface; a standard developed for the UK’s public CT2 networks which enabled the same handset to be used on different networks

Customised Application for Mobile network Enhanced Logic; an IN feature in GSM networks that enables users to carry personal services with them when roaming into other networks that support CAMEL

CAMEL Service Environment

A measure of a cellular network’s ability to support simultaneous calls

Cell Broadcast

Call Control; manages call connections

Customer Care and Billing

Common Control Channels; a group of uplink and downlink channels between the MS and the BTS (see PCH, AGCH and RACH)

Common Channel Signalling No. 7

Code Division Multiple Access; also known as spread spectrum, CDMA cellular systems utilise a single frequency band for all traffic, differentiating the individual transmissions by assigning them unique codes before transmission. There are a number of variants of CDMA (see W-CDMA, B-CDMA, TD-SCDMA et al)

The first commercial CDMA cellular system; deployed in North America and Korea; also known as IS-95

A member of the IMT-2000 3G family; backwardly compatible with cdmaOne

The first generation of cdma2000; the standardisation process indicated that there would be CDMA 2X and CDMA 3X but this no longer appears likely

A variant of CDMA 1X which delivers data only

Cellular Digital Packet Data; a packet switched data service largely deployed in the USA. The service uses idle analogue channels to carry the packetised information.

Coherent Differential Phase Shift Keying

Call Detail Records; the record made within the cellular network of all details of both incoming and outgoing calls made by subscribers, The CDR is passed to the billing system for action

The area covered by a cellular base station. A cell site may sectorise its antennas to service several cells from one locationCell site
The facility housing the transmitters/receivers, the antennas and associated equipment

Cell splitting
The process of converting a single cell to multiple cells by sectorising the antennas in the cell site or constructing additional cells within a cell site

Code Excited Linear Prediction; an analogue to digital voice coding scheme, there are a number of variants used in cellular systems

Conference of European Posts and Telecommunications. A organisation of national posts, telegraphs and telephone administrations. Until 1988, when this work was take over by ETSI, the main European body for telecommunications standardisation. CEPT established the original GSM standardisation group

Call Forwarding

Carrier to Interference ratio

Cellular Intercarrier Billing Exchange Roamer Record

Caller Identification

Circuit switching
A method used in telecommunications where a temporary dedicated circuit of constant bandwidth is established between two distant endpoints in a network. Mainly used for voice traffic; the opposite of packet switching

Calling Line Identification

Calling Line Identification Presentation

Calling Line Identification Restriction

Connection Management; is used to set up, maintain and take down call connections

Complementary Metal Oxide Substrate

A word formed by combining coder and decoder the codec is a device which encodes and decodes signals. The voice codec in a cellular network converts voice signals into and back from bit strings. In GSM networks, in addition to the standard voice codec, it is possible to implement Half Rate (HR) codecs and Enhanced Full Rate (EFR) codecs

Control signal
A signal sent to a cellular phone from a base station or vice versa which carries information essential to the call but not including the audio portion of a conversation

Customer Premises Equipment; all the equipment on the end user’s side of the network interface

Central Processing Unit

Cyclic Redundancy Check

Customer Relationship Management

Customer Support System

Cordless Telephony

Zero generation cordless telephony; the earliest domestic cordless phones which used analogue technology and which had severe limitations in terms of range and security

First generation cordless telephony; Improved analogue phones with greater range and security; a number of European nations produced CT1 standards

Second generation cordless telephony; Using digital technology CT2 phones offered greater range, improved security and a wide range of new functionalities. Used in both domestic and cordless PABX deployments, CT2 was standardised as an interim ETS but was overwhelmed by DECT

Second generation cordless telephony-common air interface

Cordless Terminal Adaptor; a DECT term

Cordless Terminal Mobility

Common Technical Regulation; part of the ETSI standardisation process

Closed User Group

Digital to Analogue conversion

Digital to Analogue Convertor

Demand Assigned Multiple Access

Digital AMPS, a US wireless standard also known as IS-136

DECT Access Node

Dynamic Channel Assignment

Dedicated Control Channels; responsible for roaming, handovers, encryption etc. (See SDCCH, SACCH and FACCH)

Data Communications Equipment

Data Clearing House

Differentially Coherent Phase Shift Keying

Digital Cellular System at 1800MHz, now known as GSM1800

Digitally Enhanced Cordless Telecommunications system, a second generation digital cordless technology standardised by ETSI

Differential Encoded Phase Shift Keying

Digital Encryption Standard

Double Frequency Shift Keying

a method of representing information as numbers with discrete values; usually expressed as a sequence of bits

Differential Pulse Code Modulation

Digital Phase Shift Keying

Digital Quadrature Phase Shift Keying

Direct Sequence CDMA

Digital Signal Processing

Digital Short Range Radio; a UK standard for a low power, short range radio system designed for small voice and data networks

Data Terminal Equipment

Dual Tone MultiFrequency; better know as Touch Tone. The tones generated by touching the keys on the phone are used for a variety of purposes including voice mail systems and voice messaging

Discontinuous Transmission

Dual Band
The capability of GSM infrastructure elements and handsets to work across both the 900MHz and 1800MHz bands. The capability to seamlessly handover between the two bands offers operators major capacity gains

Dummy Burst; transmitted as a filler in unused timeslots of the carrier

The wireless technique where one frequency band is used for traffic from the network to the subscriber (the downlink) and another, widely separated, band is used for traffic from the subscriber to the network (the uplink)

Enhanced Data rates for GSM Evolution; effectively the final stage in the evolution of the GSM standard, EDGE uses a new modulation schema to enable theoretical data speeds of up to 384kbit/s within the existing GSM spectrum. An alternative upgrade path towards 3G services for operators, such as those in the USA, without access to new spectrum. Also known as Enhanced GPRS (E-GPRS)

Electrically Erasable Programmable Read Only Memory

Enhanced Full Rate; a alternative voice codec that provides improved voice quality in a GSM network (see codec)

Electronic Funds Transfer

Extended (frequency range) GSM

Equipment Identity Register; a database that contains a list of all valid mobile stations within a network based on their IMEI

Effective Isotropic Radiated Power

The mobile phone operating system developed by Symbian. Derived from epoch-the beginning of an era-EPOC is a 32-bit operating environment which comprises a suite of applications, customisable user interfaces, connectivity options and a range of development tools

Erasable Programmable Read Only Memory

A dimensionless unit of average traffic density in a telecommunications network

Enhanced Radio Messaging System; a paging technology developed by ETSI which was intended to allow users to roam throughout Europe. Adopted by a number of European and Middle Eastern countries, ERMES, like paging in general, was overtaken by the ubiquity of GSM

European Radiocommunications Office

Effective Radiated Power

Enhanced Special Mobile Radio; a US PMR variant (see SMR)

Electronic Serial Number; a 32-bit number that uniquely identifies a mobile phone

European Strategic Programme for Research and Development in Information Technology

Extended TACS; the extension of TACS by the addition of new frequencies

European Telecommunications Standard
European Telecommunications Standards Institute: The European group responsible for defining telecommunications standards

Fast Associated Control Channel; similar to the SDCCH but used in parallel for operation of the TCH. If the data rate of the SACCH is insufficient borrowing mode is used

Frequency Correction Burst; used for frequency synchronisation of the mobile

Federal Communications Commission; the US regulatory body for telecommunications

Frequency Correction Channel; downlink only, correction of MS frequencies, transmission of frequency standard to MS etc.

Frequency Division Duplex; a radio technique which uses paired spectrum; UMTS has an FDD element

Frequency Division Multiple Access-a transmission technique where the assigned frequency band for a network is divided into sub-bands which are allocated to a subscriber for the duration of their calls

Forward Error Correction

Frequency Hopping

Frequency Hopping CDMA

Fixed Mobile Convergence

Fixed Mobile Integration

Future Public Land Mobile Telecommunications System, the original title of the ITU’s third generation concept now known as IMT-2000

Fixed Radio Access; see WLL

Filtered Symmetric Differential Phase Shift Keying

Frequency Shift Keying; a method of using frequency modulation to send digital information

Frequency Shift Offset Quadrature Modulation

Fixed Satellite ServiceGb
The interface between the PCU and the SGSN in a GSM/GPRS network

The interface between the GGSN and the HLR in a GSM/GPRS network

The interface between the SGSN and the SMSC in a GSM/GPRS network

The interface between the SGSN and the EIR in a GSM/GPRS network

The interface between the GGSN and the Internet in a GPRS network

The interface between the GGSN and the SGSN in a GPRS network

The interfaces between the GGSN/SGSN and the Border Gateway in a GPRS network

The interface between the SGSN and the HLR in a GPRS network

The interface between the SGSN and the MSC in a GSM/GPRS network

GSM/ANSI 136 Interoperability Committee

Generic Access Profile; a DECT term

A unit of data transmission rate equal to one billion bits per second

Gateway Mobile Services Switching Centre; the gateway between two networks

Global Certification Forum

Refers to a satellite in equatorial orbit above the earth which appears from the surface to be stationary

GSM-EDGE Radio Access Network; the name for the evolution of GSM towards 3G based on EDGE

GSM Global Roaming Forum

Gateway GPRS Support Node; the gateway between a cellular network and a IP network.

A unit of frequency equal to one billion Hertz per second

Global Mobile Personal Communications by Satellite

Gaussian filtered Minimum Shift Keying; a refinement of FSK which minimises adjacent channel interference

General Packet Radio Service; standardised as part of GSM Phase 2+, GPRS represents the first implementation of packet switching within GSM, which is a circuit switched technology. GPRS offers theoretical data speeds of up to 115kbit/s using multislot techniques. GPRS is an essential precursor for 3G as it introduces the packet switched core required for UMTS

Global Positioning System; a location system based on a constellation of US Department of Defence satellites. Depending on the number of satellites visible to the user can provide accuracies down to tens of metres. Now being incorporated as a key feature in an increasing number of handsets

GPRS Roaming Exchange

Global System for Mobile communications, the second generation digital technology originally developed for Europe but which now has in excess of 71 per cent of the world market. Initially developed for operation in the 900MHz band and subsequently modified for the 850, 1800 and 1900MHz bands. GSM originally stood for Groupe Speciale Mobile, the CEPT committee which began the GSM standardisation process

The GSM Memorandum of Understanding, an agreement signed between all the major European operators to work together to promote GSM. The precursor of the GSM Association

GSM-Railway, A variant of GSM designed to meet the special communications needs of international train operators

The transfer of control of a cellular phone call in progress from one cell to another, without any discontinuity

The operation of a cellular phone without using the handset; usually installed in vehicles.

Hierarchical Cell Structure; the architecture of a multi-layered cellular network where subscribers are handed over from the macro to the micro to the pico layer depending on the current network capacity and the needs of the subscriber

High level Data Link Control

High Performance Radio Local Access Network; a wireless local area network being standardised by ETSI (Also HIPERLAN2)

Home Location Register; the database within a GSM network which stores all the subscriber data. An important element in the roaming process

High Speed Circuit Switched Data; a special mode in GSM networks which provides higher data throughput By cocatenating a number of timeslots, each delivering 14.4kbit/s, much higher data speeds can be achieved

High Speed Packet Switched DataIub
The interface between the Node B and the RNC in a UMTS network

The interface between RNCs in a UMTS network

The connection between the RNC and the packet switched network in a GSM/GPRS/UMTS network

The connection between the RNC and the circuit switched network in a GSM/GPRS/
UMTS network

Interim European Telecommunications Standard

A service developed by Japanese operator NTT DoCoMo, I-mode delivers a huge range of services to subscribers and has proved enormously popular with some 30 million regular users. The revenue sharing model used for I-mode is being adopted by other operators as the basis for the new services enabled by GPRS and 3G

International Mobile Equipment Identity

International Mobile Subscriber Identity; an internal subscriber identity used only by the network

The family of third generation technologies approved by the ITU. There are five members of the family: IMT-DS, a direct sequence WCDMA FDD solution IMT-TC, a WCDMA TDD solution IMT-MC, a multicarrier solution developed from cdma2000 IMT-SC, a single carrier solution developed from IS-136/UWC-136 IMT-FT, a TDMA/TDD solution derived from DECT

Intelligent Network

Intelligent Network Application Part

A loose confederation of autonomous databases and networks. Originally developed for academic use the Internet is now a global structure of millions of sites accessible by anyone

A private network which utilises the same techniques as the Internet but is accessible only by authorised users

Internet Protocol

Intellectual Property Rights

The next generation of IP addressing designed to replace the current system IPv4 which uses a 32 bit address code which limits the number of possible addresses. IPv6 uses a 128 bit code ensuring that the possible number of IP addresses will be virtually limitless

Infra red Data Association

A low earth orbit satellite communications system developed initially by Motorola.

The first evolution in the USA from analogue to digital technology. Used a hybrid of analogue and digital technology, superseded by IS-136

Cellular standard know also as cdmaOne

Cellular standard also known as TDMA or D-AMPS

Integrated Services Digital Network

International Standards Organisation

Internet Service Provider

International Telecommunications Union

ITU Telecommunications Radio Sector

ITU Telecommunications Standardisation Sector

Interworking Function

A programming language developed by Sun Microsystems Java is characterised by the fact that programs written in Java do not rely on an operating system

Joint Photographic Experts Group

Local Area Network

Local Area Network Services
Link Access Protocol

Low Earth Orbit; refers to satellites which orbit the Earth at around 1,000 kilometres

Land Mobile Satellite Service

Line of Sight

Media Access Control; the lower sublayer of the OSI system

Metropolitan Area Network

Mobile Application Part

Megabit: a unit of data transmission speed equal to one million bits per second

Megahertz; a unit of frequency equal to one million Hertz

Multi Carrier Power Amplifier

Mobile Execution Environment; likely to be based on Java, MeXe enables WAP-enabled devices to offer a wider range of features with greater security and flexibility, as well as greater control of telephony features

Multiple Frequency Shift Keying

Man Machine Interface

Multimedia Messaging Service; an evolution of SMS, MMS goes beyond text messaging offering various kinds of multimedia content including images, audio and video clips

Modified Minimum Shift Keying

Mobile Network Operator

The process of imposing an information signal on a carrier. This can be done by changing the amplitude (AM), the frequency (FM) or the phase, or any combination of these

Memorandum of Understanding-
see GSM MoU

Motion Picture Experts Group; MPEG4 is a technology for compressing voice and video so that the information can be transmitted over normally difficult links such as mobile radio

Mobile Station

Mobile Switching Centre; the switching centre of a mobile phone network, the MSC has interfaces to the BSCs, HLR, VLR and other MSCs

Mobile Station International ISDN Number

Minimum Shift Keying; Another term for FFSK

A telecommunications technique where several channels can be combined to share the same transmission medium. The most common forms are Time Division Multiplexing (TDM) and Frequency Division Multiplexing (FDM)

Mobile Virtual Private Network

Narrowband AMPS

Normal Burst; used to carry traffic and control channels except RACH

Norme Europeenne de Telecommunications

Nordic Mobile Telephone system; an analogue cellular technology deployed in the Nordic countries in the late 1970’s; variations were also deployed in the Benelux countries and in Russia. NMT operated in the 450 and 900MHz bands and was the first technology to offer international roaming, albeit only in the Nordic countries

Node B
The element in a UMTS network which interfaces with the mobile station, analogous to a BTS in a GSM network

Over the air activation (of services and tariff changes)

Operations and Maintenance

Operations and Maintenance Centre

The radio OMC

The switching OMC

Open Systems Interconnection; a seven layer model for protocols defined by ISO

Personal Access Communication System; a digital cordless technology developed initially by Bell Labs in the US, PACS was designed to compete with DECT

Packet switching
A communication system wherein the information is transmitted in packets of a set size. These packets have address headers and find their way to their destination by the most efficient route through the network. Compared to circuit switching where a connection is occupied until the traffic exchange is completed, packet switching offers considerable efficiencies as connections can be used by a number of users simultaneously

Public Access Mobile Radio; Commercial service using trunking techniques in which multiple groups of users can set up their own closed systems within a shared public network

Public Access Profile; a DECT term

Paging Channel; downlink only, the MS is informed of incoming calls by the BTS via the PCH

Pulse Code Modulation; the standard digital voice format at 64kbit/s

Personal Computer Memory Card Interface Association the body responsible for defining the standards and formats for memory expansion cards for laptop computers and PDAs. Now extended to cover cards for mobile phones

Personal Communications Network; a designation initially used in the UK to refer to networks operating in the 1800MHz band (see also DCS1800). No longer in use

PCS 1900
Personal Communications Systems 1900MHz; the terminology used in the US to describe the new digital networks being deployed in the 1900MHz band; rarely used today

Packet Control Unit; an element in a GPRS/UMTS network

Personal Digital Assistant

Personal Digital Communications; a digital cellular technology developed and deployed uniquely in Japan. A TDMA technology, PDC is incompatible with any other digital cellular standard

Pan European Digital Communications; A designation occasionally used in the early 1990’s to describe GSM. No longer in use

The percentage of the total population which owns a mobile phone

Personal HandyPhone System/Phone; a digital cordless technology developed in Japan which achieved great success. Deployed by NTT DoCoMo and other Japanese operators PHS offered two-way communications, data services and Internet access and eventually won some 28 million customers. Now in decline as cellular’s wide area capabilities offer better service

Personal Identifier Number

Public Key Infrastructure

Public Land Mobile Network; any cellular operator’s network

Private Mobile Radiocommunications; two-way radio technology widely used for despatch and delivery services, taxi companies and the like. See TETRA

Post Office Code Standardisation Group; a now defunct industry grouping which standardised pager addressing systems

Points of Presence; a method of measuring the value of a cellular licence; the approximate number of potential customers within a geographical area

Plain Old Telephone Service

Programmable Read Only Memory

Phase Shift Keying

Public Safety Radio Communications Project; an initiative by the UK Government to standardise all emergency services communications on to a single digital technology (see TETRA)

Public Switched Data Network

Public Switched Packet Data Network

Public Switched Telephone Network

Power Supply Unit

Public Telecommunication Operator

Posts, Telephone and Telegraph Administration

Push-to-Talk; a feature of PMR systems

Personal Wireless Telecommunications; a variant of DECT developed for use in the USA

Quadrature Amplitude Modulation

Quadrature Amplitude Phase Shift Keying

Quadrature Code Excited Linear Prediction

Quality of Service; a broad term to describe the performance attributes of an end-to-end connection

Quadrature Phase Shift Keying

Research in Advanced Communications in Europe

Random Access Channel; uplink only, allows the MS to request an SDCCH in response to a page or for a call

Random Access Memory

Radio Fixed Part; equivalent to a base station in a DECT system

Radio Common Carrier

Regular pulse Excitation Linear Prediction coding

The assignment of frequencies or channels to cells so that adjoining cells do not use the same frequencies and cause interference whereas more distant cells can use the same frequencies. Reuse expands the capacity of a cellular network by enabling the use of the same channels throughout the network

Radio Part

Radio Network Controller; the element which controls the Node Bs within a UMTS network. It is roughly analogous to a BSC in a GSM network

A service unique to GSM which enables a subscriber to make and receive calls when outside the service area of his home network e.g. when travelling abroad

A device which forwards information in a network on a connectionless basis

Radio Resource Management, part of the UMTS infrastructure

Remote Terminal

Slow Associated Control Channel; transmits continuous measurements in parallel with operation of TCH or SDCCH; needed for handover decisions

Specific Absorption Rate

Synchronisation Burst; used for time synchronisation of the mobile

Synchronous CDMA (see CDMA)

Synchronisation Channel; downlink only frame synchronisation and identification of base station

Switching/Service Control Point

Stand-alone Dedicated Control Channel; communications channel between the MS and the BTS. Used for signalling during call set-up before a TCH is allocated

Synchronous Data Link Control

Spatial Division Multiple Access

Serving GPRS Support Node; the gateway between the RNC and the core network in a GPRS/UMTS network

Subscriber Identity Module; A smart card containing the telephone number of the subscriber, encoded network identification details, the PIN and other user data such as the phone book. A user’s SIM card can be moved from phone to phone as it contains all the key information required to activate the phone

Small Office/Home Office

An Internet derived expression for the one-way transmission of video and audio content

SIM ToolKit: specified within the GSM standard, this allows operators to add additional functions to the phone menu in order to provide new services such as mobile banking or email

Specialised Mobile Radio; the US term for private mobile radio (See PMR)

Short Message Service; a text message service which enables users to send short messages (160 characters) to other users. A very popular service, particularly amongst young people, with 400 billion SMS messages sent worldwide in 2002

SMS Centre-the network entity which switches SMS traffic

SMS Cell Broadcast

SMS Mobile Originated

SMS Mobile Terminated

SMS Point to Point

Service Provider

Staggered Quadrature Amplitude Modulation
Staggered Quadrature Phase Shift Keying

Supplementary Service Support; handles special services

Signalling System Number 7 (See CCS7)

Service Switching Point

Synchronous Transfer Mode

A company created by Psion, Nokia, Ericsson and Motorola in 1998 with the aim of developing and standardising an operating system which enable mobile phones from different manufacturers to exchange information
The operating system is known as EPOC. Matsu****a has subsequently joined Symbian

Total Access Communications System (an AMPS variant deployed in a number of countries principally the UK)

Transferred Account Procedure; the essential charging methodology for international GSM roaming. There have been four TAP standards, TAP1, TAP2, TAP2+ and TAP3. The latter offers variable record length and is sufficiently flexible to support all future requirements arising from the move to 3G

Technical Basis for Regulation (part of the ETSI standardisation process)
Traffic Channel

Time Division CDMA

Time Division-Synchronous CDMA; a CDMA variant developed by Chinese vendors which is claimed to offer high data rates and greater coverage

Time Division Duplex; a radio technology for use in unpaired spectrum. WCDMA/UMTS includes a band for TDD mode usage and both PHS and DECT use this technology

Time Division Multiple Access; a technique for multiplexing multiple users onto a single channel on a single carrier by splitting the carrier into time slots and allocating these on a as-needed basis

A wireless communications system designed for the collection and dissemination of information, particularly refers to vehicle-based electronic systems, vehicle tracking and positioning, on-line vehicle navigation and information systems and emergency assistance

Terrestrial Trunked Radio; a European developed digital private mobile radio technology which is now being extensively deployed worldwide
A competitive digital PMR technology to TETRA developed by French vendors

Terrestrial Flight Telephone System
A frame within a TDMA schema; has a time interval of 576 microseconds. Physical content of a timeslot is known as a burst. Five different burst types exist, they are distinguished by different TDMA frame divisions (see NB, FB, SB, AB and DB)

Telecommunications and Internet Protocol Harmonisation over Networks; an ETSI project designed to support the market for voice communications and voice band communications. In particular TIPHON will ensure that users on IP-based networks can communicate with those on circuit switched networks

Telecommunications Management Network

Temporary Mobile Subscriber Identity; covers the IMSI to prevent over-the-air interception and tracing

Transcoder Rate Adapter Unit; the transport unit for a 16kbit/s traffic channel on the A-bis interface

Refers to a mobile phone able to operate on the three internationally designated GSM frequencies- 900, 1800 and 1900MHz

A technology which enables the optimal synchronisation of calendars, address books, action lists and memoranda. It enables multi-point, one-step synchronisation of wireless and wireline devices, desktop computers and server-based applications and services

Transmitter/receiver (transceiver)
Total Access Communications System (an AMPS variant deployed in a number of countries principally the UK)

User Interface

The air interface between the BTS and the MS in a GSM network

The air interface between the Node B and the MS in a UMTS network.

Universal Mobile Telecommunications System; the European entrant for 3G; now subsumed into the IMT-2000 family as the WCDMA technology.

Universal Personal Number

Universal Personal Telecommunications

Uniform Resource Locator; the addressing system of the Internet

Universal Service Obligation

Universal Terrestrial Radio Access; the air interface component of WCDMA.

Universal Terrestrial Radio Access Network; the UMTS radio access network comprising the RNC, Node B and the air interface

Universal Subscriber Identity Module; the 3G equivalent of the GSM SIM

Ultra Wide Band

Value Added Services

Variable Bit Rate

Virtual Home Environment

Visitor Location Register

Voice coder

Voice over Internet Protocol

Virtual Private Network

Very Small Aperture Terminal

Vector Sum Excited Linear Prediction

Wireless Application Protocol; a de facto standard for enabling mobile phones to access the Internet and advanced services. Users can access websites and pages which have been converted by the use of WML into stripped-down versions of the original more suitable for the limited display capabilities of mobile phones

World Administration Radio Conference; an ITU conference held at regular intervals to determine the allocation of spectrum for various services

Wideband CDMA; the technology created from a fusion of proposals to act as the European entrant for the ITU IMT-2000 family

Wireless Local Loop; a technique for providing telephony and low speed data services to fixed customers using wireless. Regarded as having considerably potential for rapidly addressing the telecommunications gap in developing countries. A number of different WLL solutions have been marketed based on cellular and cordless technologies

Wireless Local Area Network; a short range radio network normally deployed in traffic hotspots such as airport lounges, hotels and restaurants. WLAN enables suitably equipped users to access the fixed network wirelessly, providing high speed access (up to 11Mbit/s download) to distant servers. The key WLAN technologies are the IEEE802.11 family and ETSI HIPERLAN/2

Wireless Markup Language; a markup language developed specifically for wireless applications. WML is based on XML

Weighted Quadrature Amplitude Modulation

World Wide Web

eXtended Markup Language

The Consumer Mobile Glossary

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

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

Battery status/Battery charge display
An indication of the amount of battery life remaining

A chargeable device which provides the mobile phone with power. A variety of battery technologies have been used for mobile phones including nickel cadmium (NiCad), nickel metal hydride (NiMH) and lithium ion (Li-ion)

Call barring
A service which enables users to bar certain incoming or outgoing calls on their mobile phones

Call timer
A service which keeps track of the amount of airtime being used by the subscriber on a cumulative basis

Call divert
The capability to divert incoming calls to another phone (fixed or mobile) or to an answering service

Call hold
The ability to put an ongoing call on hold whilst answering or making a second call

Caller ID
Caller Identification; displays the name/number of the person calling a mobile phone. Also known as CLI

See Caller ID

Clear; the key on a cellular phone which is pressed to remove information from the display

Data capable
Mobile phones which have the capability to enable transmission of data from a laptop computer or PDA via the phone

Dual band
Mobile phones which support transmission and reception of calls on the 900MHz and 1800MHz bands with seamless handover between the two frequency bands

Enhanced Full Rate (codec); an improved version of the standard voice codec used in GSM phones; offers improved speech quality without impacting on network capacity

The key on a cellular phone which is pressed to terminate a call

Infrared data port
A facility on a mobile phone to allow information to be exchanged with other devices e.g. a PC using infra red technology

A function on a cellular phone which, when activated, prevents use of the phone until the user enters a security code

No Service
An indication on the display of a cellular phone that indicates that the user is in an area where cellular service is unavailable

One-touch dialling
The ability to dial frequently called numbers using a single key stroke; see Speed Dialling

Personal Communications Networks; an outdated term for GSM services in the 1800MHz band

Personal Digital Assistant; a sophisticated handheld device with advanced display facilities and a range of business-oriented software programs

Phone book
A list of personal names and numbers stored in a mobile phone’s internal memory or in the SIM card. These numbers can be called by accessing the appropriate memory and making a single key stroke

Personal Identity Number; a number, usually four digits, that must be keyed into a mobile phone to make it work. A security measure to prevent unauthorised usage

The function on a cellular phone which recalls a phone number from memory

The ability to make and receive calls on the same mobile phone when travelling outside the area of the home network operator

a combination of mobile phone and personal digital assistant

Send; The key on a cellular phone which initiates a call or answers an incoming call

Speed dialling
See One-touch dialling

Standby time
The length of time a battery can power a mobile phone when it is switched on but not making or receiving calls

The length of time a battery can power a mobile phone when making or receiving calls

A service offered by network operators whereby calls received when the mobile is in use, switched off or out of coverage can be diverted to an answering service which can be personalised by the user

Wireless Application Protocol; a standard whereby mobile phones can gain access to specially tailored Internet websites

Wireless Markup Language; a specially designed markup language used for tailoring WAP content. WML enables optimum usage of the limited display capabilities of the mobile phone

1G (First Generation Wireless) a term used to describe the first generation of wireless technology (analog cell phones). The systems were designed only to carry voice technology.

1xRTT the name for the first phase in CDMA’s evolution to third-generation 

(3G) technology. 1xRTT networks allow for increased network capacity (more users; fewer dropped calls), better battery life, and increased data speeds 
(up to 144Kbps). According to Qualcomm, the developers of the technology, 1x stands for a single radio channel, while RTT stands for radio transmission technology.

2G (also known as (PCS) Personal Communications Services) a term used to describe the second generation of wireless technology (digital cell phones). 2G technology converts voice to digital data for transmission over the air and then back to voice. 2G is the current wireless service available in North 

2.5G second-and-a-half generation wireless technology. Most carriers will move to this wireless technology before making the upgrade to 3G. A 2.5G network with GPRS or 1xRTT will change existing wireless networks to a packet-switched service that will increase data transmission speeds.

3-Way Calling allows you to conduct a conference call between three parties. (network and sub******ion dependent feature - not available in all areas)

3G (Third Generation Wireless) a term used to describe the next generation of wireless technology which will provide users with high speed data transmissions (up to 2Mbps) and the ability to roam globally. Known as IMT 2000 by the ITU and implemented in Europe as UMTS and cdma2000 in North America.

3GPP (3rd Generation Partnership Project) a cooperation of standards organizations (ARIB, CWTS, ETSI, T1, TTA and TTC) throughout the world that is developing the technical specifications for third generation wireless technology.

4G (Fourth Generation Wireless) communications systems that are characterized by high-speed data rates at 20+ Mbps, suitable for high-resolution movies and television. Initial deployments are anticipated in 2006-2010.

802.11 refers to a family of specifications for wireless local area networks (WLANs) developed by a working group of the Institute of Electrical and Electronics Engineers (IEEE). There are currently four specifications in the family: 802.11, 802.11a, 802.11b, and 802.11g.

802.11a refers to a new wireless local area network technology that operates in the 5 gigahertz spectrum. 802.11a is able to transmit data at speeds up to 54 Mbps and helps eliminate interference from devices operating at 2.4 gigahertz, such as cordless phones and microwave ovens.

802.11b often called Wi-Fi, is the most widely used wireless local area network technology. 802.11b technology operates in the 2.4 GHz range offering data speeds up to 11 megabits per second. A user with a Wi-Fi product can use any brand of access point with any other brand of client hardware that is built to the Wi-Fi standard.

AC (Alternating Current) the standard electricity type 

AC Charger an accessory device that allows you to power and/or charge your phone from a wall outlet

Activation the process by which a cell phone account is created, your phone number assigned, and your phone programmed so that you can make and receive calls. 

Active Flip/Keypad Cover a feature that will answer a call by opening the keypad cover and end a call by closing the keypad cover. 

AMPS (Advanced Mobile Phone Service) the standard for analog cellular telephones which uses a frequency-modulated transmission and spacing to separate transmissions. Operates in the 800 megahertz (MHZ) band
Analog a technology which utilizes a continuous “wave” of signal to carry information over radio channels. In contrast to digital technology, which allows upwards of 15 calls per channel, analog only permits 1 call per channel. Early cell phones all used analog technology. Although analog phones are still common, the majority of new handsets are digital and some carriers no longer offer analog service. 

Antenna a part of a cell phone that receives and transmits cellular radio-frequency transmissions

ARM one of the three types of processors that can be found in Pocket PCS. Created by ARM Ltd., the ARM processor has a unique architecture compared to its two competitors (MIPS and SH3), and therefore can only run programs created specifically for it. 

Back-Lit Illumination illuminates a wireless device’s display and keypad for better low light viewing

Band a specific range of frequencies in the radio frequency (RF) spectrum. 
Battery Capacity the capacity of wireless devices’ battery. Measured in milliampere hours (mAh). 

Battery Indicators a feature which alerts you that the battery is running low with either an audible tone, or a visual indicator. 

Battery Strength Meter a visual indicator of the estimated time remaining on the battery. Helps avoid dropped calls due to insufficient current voltage. 
Bluetooth a wireless personal area network (PAN) specification that connects phones, computers, appliances, etc. over short distances without wires by using low power radio frequencies. 

BPS (Bits Per Second) a measure of how fast binary digits can be sent through a channel. The number of 0s and 1s that travel down the channel per second.

BREW (Binary Runtime Environment for Wireless) is an open source application development platform for wireless devices equipped for code division multiple access (CDMA) technology. Developed by Qualcomm, BREW makes it possible for developers to create portable applications that will work on any handsets equipped with CDMA chipsets. A similar and competing platform is J2ME (Java 2 Micro Edition), from Sun Microsystems. 

Cell Site a fixed cellular tower and radio antenna that handles communication with subscribers in a particular area or cell. A cellular network is made up of many cell sites, all connected back to the wired phone system. 

Digital a method of encoding a transmission that involves translating information (in the case of digital phones the information would be a voice conversation) into a series of 0’s and 1’s. Digital communications technology offers cleaner calls without the static and distortion that is common with analog phones. The majority of new handsets sold today are digital rather than analog technology. 

DSP (Digital Signal Processing) refers to manipulating analog information, such as sound or photographs that has been converted into a digital form to improve accuracy and reliability of digital communications. 

DTMF (Dual Tone Multi-Frequency) are tones that your phone transmits to communicate with tone activated phone systems like voice mail or bank by-phone. 

Dual-Band a wireless phone which is able to operate on both 800MHz and 1900MHz digital networks to send and receive calls; basically, the phone can operate in either digital cellular or PCS frequencies. 

EDGE (Enhanced Data rates for Global Evolution) a technology being promoted by the TDMA and GSM communities that is capable of both voice and 3G data rates up to 384 Kbps. The standard is based on GSM standard and uses TDMA multiplexing technology.

ESN (Electronic Serial Number) a unique unchangeable number that is embedded into the phone and is transmitted by the phone as a means of identifying itself within the system. 

FOMA (Freedom Of Mobile multimedia Access) the name of NTT DoCoMo’s WCDMA service. 

GPRS (General Packet Radio Service) a next generation (2.5G) technology standard for high-speed data transmission over GSM networks. GPRS sends data over packets rather than via circuit switch connections on cellular networks which allows for “always on” wireless data connections and speeds up to 115Kbps. 

GPS (Global Positioning System) a system of 24 satellites, computers, and receivers that is able to determine the latitude and longitude of a receiver on Earth. By triangulation of signals from three of the satellites, a receiving unit can pinpoint its current location anywhere on earth to within a few meters. 

GSM (Global System for Mobile Communications) a type of digital wireless network which has been widely deployed throughout the world. There are 4 primary frequencies in use today: 850MHz, 900MHz, 1800MHz and 1900MHz. In Canada and the United States, you will find support for the 850, 1800 and 1900MHz bands, while most countries in Europe and Asia support either 900, 1800 or 1900MHz.

GSM 900 GSM networks operating at 900 MHZ. 
GSM 1800 GSM networks operating at 1.8 GHz. 
GSM 1900 GSM networks operating at 1.9 GHz

HSCSD (High Speed Circuit Switched Data System) enables the transmission of data over current GSM networks at speeds up to 43.2 kbps. HSCSD enables such high speeds by using multiple channels. 

IMEI (International Mobile Equipment Identifier) a 15-digit number given to every single mobile phone, typically found behind the battery. 

IMSI (International Mobile Subscriber Identity) a unique number for every SIM, used with a key for authentication. 

IrDA (Infared) allows cell phones, PDAs, and other devices to connect to each other for various purposes. For example, a laptop or PDA can exchange data with a desktop computer or use a printer without a cable connection. 

IrDA requires line-of-sight transmission like a TV remote control. 

IrDA Port a transmitter/receiver for infrared signals 

iTAP software developed by Motorola and built into some wireless phones and PDAs that makes typing words on a keypad easier. The competitor to iTAP is T9

J2ME (Java 2 Micro Edition) is a technology that allows programmers to use the Java programming language and related tools to develop programs for wireless and mobile devices such as cellular phones and personal digital assistants (PDAs). The J2ME platform can be used to implement a wide variety of applications, from wireless games to data portals into the Internet or corporate enterprise databases. 

KBps (Kilobytes Per Second) a measure of bandwidth (the amount of data that can flow in a given time) on a data transmission medium. One thousand bytes per second. About the size of one average e-mail message. 
Kbps (Kilobits Per Second) a measure of bandwidth (the amount of data that can flow in a given time) on a data transmission medium. One thousand bits per second. 

LCD (Liquid crystal display) a type of display used on most cell phones, capable of displayingmonochrome characters and some pictures. The LCD has low energy requirements and uses dark segments against a lighter background for easy viewing in all lighting conditions. Color LCD displays use two basic techniques for producing color: Passive matrix is the less expensive of the two technologies. The other technology, called thin film transistor (TFT) or active-matrix, produces color images that are as sharp as traditional CRT displays, but the technology is expensive.
LED (Light emitting diode) a semiconductor device that illuminates when electricity passes through it. Often used as an indicator light, or to spell out words and numbers. LEDs come in many colors, and some LEDs contain multiple elements and are therefore capable of multiple colors. Provides good visibility in direct sunlight and in darkness

Lithium Ion (LiIon) a type of rechargeable battery for cell phones which is generally lighter weight than earlier battery types, has a relatively longer cycle life, and generally does not suffer from “memory” effect. 

Lithium Polymer a battery technology similar to lithium ion but allows the battery to be molded to any shape allowing greater flexibility for mobile phone designers. 

Master Clear changes all non-standard user settings in a mobile phone to standard plus clears all memory locations. 

Master Reset same as a master clear, but it does not clear all a phone’s memory locations and call timers.

MIDI (Musical Instrument Digital Interface) a standard that allows digital musical instruments to communicate with one another. In cell phone terms, MIDI is what gives you polyphonic sounds; which means your ring tones can sound like real music instead of beeps. 

MMS (Multimedia Messaging Service) a further extension of SMS and EMS.
MMS is designed to make use of newer and quicker mobile transmission methods such as GPRS, HSCSD, EDGE and UMTS, involving the attachment of multimedia extensions to messages, such as video and sound. An e-mail function is also planned. 

MO-SMS (Mobile-Originated Short Message Service) the ability to send short text messages from a phone. Both the phone and the carrier’s network must support this feature for it to work. Messages can be sent to other phones by phone number. Many phones also allow sending messages directly to e-mail addresses. 

MP3 Playback some cell phones feature a MP3 player (built-in or add-on accessory) that allow you to listen to music stored in the MP3 digital format. These files are much smaller than other formats such as wave files, yet can deliver CD quality sound. Generally, music can be downloaded into the phone from a computer and played back later through a headset attached to the phone. Newer phones with High-Speed Data may support downloading music directly over the Wireless Internet.

NAM (Number Assignment Module) a circuit chip located inside a phone which stores your telephone number, lock code, timer reset code, network information and other operational data. The NAM is programmed by the service provider when a device is activated. Today’s phones have EPROM type NAM and are keypad programmable. 

NAMPS (Narrowband Advanced Mobile Phone Service) is the next generation of AMPS systems. NAMPS is a cellular call-handling system that uses digital signaling techniques to split the existing channels into three narrowband channels. The result is three times more voice channel capacity than the traditional AMPS system provides. 

NiMH (Nickel Metal Hydride) a newer type and common from of rechargeable battery for cell phones which will is less sensitive to the memory effect. 
OLED (Organic Light-Emitting Diode) a next-generation display technology that consists of small dots of organic polymer that emit light when charged with electricity. OLED is beginning to replace LCD technology in handheld devices such as PDAs and cell phones because the technology is thinner, lighter, brighter, cheaper to manufacture and consumes less power than LED’s.

OTA (Over The Air) the downloading of ring tones, picture messages, and other content to your mobile phone wirelessly. 

P-Java (Personal Java) a Java API and specification for running Java applications on small devices. 

Packet a piece of data transmitted over a packet-switching network such as the Internet or wireless Internet; a packet includes not just data but also its destination. 

Packet Switching a type of communication that splits information into “packets” of data for transmission. This is efficient, as it only uses radio spectrum when it’s actually sending something, rather than keeping an open channel at all times (as is done in circuit switching). Packet switching is a core component to 3G technology. 

Passive Matrix Display an LCD technology that uses a grid to supply the charge to each particular pixel on the display. An STN screen has a slower refresh rate than a TFT screen, but it’s cheaper. Also called a SuperTwist Nematic of STN display. 

PC Card (PCMCIA) a removable, credit-card sized devices that may be plugged into slots in PCS and wireless communication devices to provide fax or modem functions or network cards. 

PCMCIA (Personal Computer Memory Card International Association) a group of hardware manufacturers and vendors responsible for developing standards for PC Cards (also called PCMCIA cards.) 

PCN also known as DCS 1800 or GSM 1800, PCN is a term used to describe a wireless communication technology in Europe and Asia. 

PDA (personal digital assistant) a portable, handheld computing device that acts as an electronic organizer. PDAs are typically used for managing addresses, appointments, to-do lists and notes, but some newer models support wireless Internet access, e-mail, and other interactive applications. Also referred to as Handheld Computers. PDAs come in two major flavors - Palm and Pocket PC. 

PIN (Personal Identification Number) a numeric code or password that may be required by a service provider in order to make outgoing calls or obtain access to certain applications and data. This code is always associated to a SIM card, not a phone and is designed to help guard against cellular fraud. 

PTT (Push-To-Talk) a two-way communication service that works like a “walkie talkie”. This feature, found on Motorola iDEN phones from Nextel and Telus Mobility’s Mike, allow communication in only direction at a time unlike a cell phone that allows for simultaneous conversations. New PTT systems are now being introduced that use VoIP technology to provide PTT service digitally over 3G data networks

PUK (Personal Unblocking Code) used to unblock a blocked SIM card, this code is given during the sub******ion of a phone

PWR represents the on/off (power) key on some wireless devices.

SDK a Software Development Kit for wireless application developers. 

SDMA (Space Division Multiple Access) a variation of TDMA and CDMA that potentially will be used in high-bandwidth, third-generation wireless products.

Security Code a numeric code (password) used to prevent unauthorized or accidental alteration of data programmed into wireless phones. The security code can be used by the owner of a phone to change the lock code. 

T9 software built into some wireless phones and PDAs that makes typing words on a keypad easier. The competitor to T9 is iTAP

TFD (Thin Film Diode) a type of LCD (Liquid Crystal Display) flat-panel display technology. TFD technology combines the excellent image quality and fast response times of TFT, with the low power consumption and low cost of STN.

TFT (Thin Film Transistor) an LCD technology that uses transistors to precisely control the voltage to each liquid crystal cell. This is also referred to as an “active matrix” display. TFT screens offer the best image quality and refresh rates, but at a higher cost. 

Tri-Band a phone capable of operating on three different digital frequencies (example: 900MHz, 1800MHz and 1900MHz). 

UMTS (Universal Mobile Telecommunications System) a third-generation wireless communications technology and the next generation of GSM (Global System for Mobile Communications). UMTS is a wireless standard approved by the International Telecommunications Union (ITU) and is intended for advanced wireless communications. UMTS promises high-speed mobile data (up to 2 Mbps) and advanced multimedia capabilities such as streaming video.

URL (Uniform Resource Locator) a unique name or number that specifies the location of a file on the Internet. A URL consists of a protocol, such as http:// that specifies a web page, followed by a server or path name

USB (Universal Serial Bus) a plug-and-play interface between a computer and add-on devices (such as keyboards, phones and PDAs). With USB, a new device can be added to a computer without having to add an adapter card or even having to turn the computer off. USB supports a data speed of 12 megabits per second and is now being incorporated in some cell phones which is useful for synchronizing information with a computer or downloading rington

VoIP (Voice over Internet Protocol) a technology for transmitting voice, such as ordinary telephone calls, over the Internet using packet-switched networks. Also called IP telephony. 

W-CDMA (Wideband Code Division Multiple Access) a third-generation (3G) wireless technology that supports high-speed data transmission (144 Kbps to 2 Mbps), always on data service, and improved network capacity (more people can use each tower at the same time) in GSM systems by using CDMA instead of TDMA. The version of WCDMA used by NTT DoCoMo in Japan is called FOMA or J-WCDMA; the European version is referred to as UMTS, E-WCDMA, or MT-2000 Direct Spread. W-CDMA is a competitor to cdma2000. 
WAN (Wide Area Network) a physical or logical network that provides data communications to a larger number of users than are usually served by a local area network (LAN) and is usually spread over a larger geographic area than that of a LAN. 

WAP (Wireless Application Protocol) a set of standards that enables a wireless phone or other mobile device to browse Internet content optimized for wireless phones. The competitive technology to WAP is I-Mode by Japan’s NTT DoCoMo. 
WAP gateway software that takes raw WML data and compiles it for a micro-browser and vice versa. 

WASP (Wireless Application Service Provider) vendors that provide hosted wireless applications so that companies will not have to build their own sophisticated wireless infrastructures. 

WBMP (Wireless Bitmap) a bitmap graphic format for integration of images in WAP pages. WBMP graphics are only black and white and have a 1 Bit size. 
WCS (Wireless Communications Services) services used to conduct communications over wireless networks. 

Web clipping an application that allows a user to extract relevant information from a web page for display on a smart phone or a PDA. 
Wi-Fi (Wireless Fidelity) the popular term for the 802.11b wireless Ethernet standard. See 802.11b. 

WIM (WAP Identity Module) the security module implemented in a SIM card. The security module is needed for some WAP services, such as banking services or shopping on a WAP site. 

Windows CE a streamlined version of Windows from Microsoft for handheld computers which has since been upgraded and renamed Pocket PC. Windows CE ran Pocket versions of Microsoft office applications such as Word and Excel as well as many applications that were geared specifically for the smaller platform. 

Wireless a term used to describe the use of radio-frequency spectrum for transmitting and receiving voice, data and video signals for communications. 
Wireless Internet a technology that enables a cell phone or other wireless device to access specially formatted Internet content via wireless networks. Several different standards exists: HDML, WML, cHTML, and xHTML. Also known as “Wireless Web” or “WAP”. 

Wireless IP a packet data protocol standard for sending wireless data over the Internet. 

WWW (World Wide Web) one of the primary applications in the Internet. It is a system in which information display is made through the use of hypertext (HTML), where it is possible to combine all Internet services and use text, images and sound simultaneously.

DCT /3,4 - digital core technology

DCT/L- digital core technology linda

BB5 - base band 5

ASIC - application-specific integrated circuit