For All Member Usefull Gsm Dictionry

[shah87n]

P
PACS:

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


PACS
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

PAMR
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

PAP
Public Access Profile; a DECT term

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

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

PCMCIA
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

PCN
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

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

PDA
Personal Digital Assistant

PDC
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

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

Penetration
The percentage of the total population which owns a mobile phone

PHS / PHP
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

PIN
Personal Identifier Number

PKI
Public Key Infrastructure

PLMN
Public Land Mobile Network; any cellular operator’s network

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

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

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

POTS
Plain Old Telephone Service

PROM
Programmable Read Only Memory

PSK
Phase Shift Keying

PSRCP
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)

PSDN
Public Switched Data Network

PSPDN
Public Switched Packet Data Network

PSTN
Public Switched Telephone Network

PSU
Power Supply Unit

PTO
Public Telecommunication Operator

PTT
Posts, Telephone and Telegraph Administration

PTT
Push-to-Talk; a feature of PMR systems

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


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Personal Communications Networks; an outdated term for GSM services in the 1800MHz band

PDA
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

PIN
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

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 subscription of a phone

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

[shah87n]

QAM - Quadrature Amplitude Modulation

QAPS - Quadrature Amplitude Phase Shift Keying

QCELP - Quadrature Code Excited Linear Prediction

QoS - Quality of Service

( a broad term to describe the performance attributes of an end-to-end connection)

QPSK - Quadrature Phase Shift Keying

[shah87n]

RACH - Random Access Channel
RACE - Research in Advanced Communications in Europe


RAM - Random Access Memory

RAP3G- Radio Application Processor 3rd Generations
RCC - Radio Common Carrier



Reuse:
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




RELP - Regular pulse Excitation Linear Prediction coding


RF AMP = Radio Frequency Amplifier

RFP - Radio Fixed Part
(equivalent to a base station in a DECT system)

RNC
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
RP - Radio Part

Roaming:
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

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

RRM - Radio Resource Management, part of the UMTS infrastructure

RT - Remote Terminal

RX :- signal received

[shah87n]

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

SAR - Specific Absorption Rate

SB - Synchronisation Burst; used for time synchronisation of the mobile

S-CDMA - Synchronous CDMA (see CDMA)

SCH - Synchronisation Channel
(downlink only frame synchronisation and identification of base station)

SCP - Switching/Service Control Point

SDCCH - 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



SDK:
a Software Development Kit for wireless application developers.
SDLC
Synchronous Data Link Control

SDMA - Spatial 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.

SGSN - Serving GPRS Support Node


SIM - 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

SoHo - Small Office/Home Office

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

STK
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


Smartphone:
a combination of mobile phone and personal digital assistant

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

SMS - 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)

SMSC - SMS Centre-the network entity which switches SMS traffic

SMSCB - SMS Cell Broadcast

SMS-MO - SMS Mobile Originated

SMS-MT - SMS Mobile Terminated

SMS-PP - SMS Point to Point


SNR - signal to noise ratio
SP - Service Provider

SQAM - Staggered Quadrature Amplitude Modulation

SQPSK - Staggered Quadrature Phase Shift Keying


SRAM - Syncronous Random Access Memory

SS - Supplementary Service Support; handles special services

SS7 - Signalling System Number 7 (See CCS7)

SSP - Service Switching Point


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

STM - Synchronous Transfer Mode

Symbian:
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. Matsushita has subsequently joined Symbian

[shah87n]

TACS - Total Access Communications System

TAP - 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)



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

TD-CDMA - Time Division CDMA

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

TDD - 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)

TDMA - 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)

Telematics:
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

TETRA: - Terrestrial Trunked Radio
a European developed digital private mobile radio technology which is now being extensively deployed worldwide

Tetrapol:
A competitive digital PMR technology to TETRA developed by French vendors

TFTS - Terrestrial Flight Telephone System

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.)


Timeslot:
A frame within a TDMA schem; 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)

TIPHON - 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

TMN - Telecommunications Management Network

TMSI - Temporary Mobile Subscriber Identity
(covers the IMSI to prevent over-the-air interception )and tracing

TRAI- Telecom Regulatoy Authority of India

TRAU - Transcoder Rate Adapter Unit

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

TrueSync:
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

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

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


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


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

[shah87n]

Upp - Universal power processor

UI - User Interface



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

UPN - Universal Personal Number

UPT - Universal Personal Telecommunications

URL - Uniform Resource Locator( the addressing system of the Internet)

USO - Universal Service Obligation

UTRA - Universal Terrestrial Radio Access

UTRAN - Universal Terrestrial Radio Access Network

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

UWB - Ultra Wide Band



UMTS - Universal Mobile Telecommunications System
(UMTS, 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.)



USB - Universal Serial Bus

[shah87n]

VHE - Virtual Home Environment

VLR - Visitor Location Register

Vocoder - Voice coder

VoIP - Voice over Internet Protocol

VPN - Virtual Private Network

VSAT - Very Small Aperture Terminal

VSELP - Vector Sum Excited Linear Prediction
Voicemail:
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

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.
VCO.................Voltage Control Oscillator
VLR (Visitor Location Register)
VAS
Value Added Services

VBR
Variable Bit Rate

VHE
Virtual Home Environment

VLR
Visitor Location Register

Vocoder
Voice coder

VoIP
Voice over Internet Protocol

VPN
Virtual Private Network

VSAT
Very Small Aperture Terminal

VSELP
Vector Sum Excited Linear Prediction
Voicemail
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

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.

[shah87n]

WAP - Wireless Application Protocol
(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)



WASP - Wireless Application Service Provider


WARC - World Administration Radio Conference


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.


W-CDMA - Wideband Code Division Multiple Access

Web clipping:
this is 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.



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 run Pocket versions of Microsoft office applications such as Word and Excel as well as many applications that were geared specifically for the smaller platform.

WLAN - 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

WML - 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)



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

[shah87n]

XML
eXtended Markup Language
Y
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pleases pm me

Z
Nothig i found to post here

if u have some thing

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[john_john]

very nice info sir..............keep it up