Brief Technological Terminology A-Z

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This brief terminology is essential for those who are dealing with it for the first time...lets see :

2G

In mobile telephony,protocols of second generation uses digital coding like GSM, D-AMPS (TDMA) i CDMA standards. 2G networks are avaluable worldwide and support high sound quallity but limited with bandwith and data speed.Most of 2G protocols has different encription levels with range between 880-915 MHz, 925-960 MHz, 1710-1785 MHz or 1805-1880 MHz.

3G

This is protocol of third generation capable for high speed data transfers measured in Mbps, and first use is attent not to sound transfer but data speed transfers. First 3G networks has been developed in Japan,year 2001. In Europe and Asia first 3G networks has started in year 2002,and in USA little bit later. 3G network is used for high speed data transfers and high bandwith use telephony such video transmitting,internet communication and such.3G network has much more implementations than only for personal use.For 3G World Radio Conference has deducated frequencies between range 230 MHz and 2 GHz deducated for multimedia purposies.
3G data transfer has to be capable to transfer data (for lowest values):

144 kbp/s used in average car speed and moving,
384 kbp/s transfer used for average walk and
2 MBp/s on fixed location.

ActiveSync

Software provided by Microsoft for synchronisation and data transfer between devices based on Windows Mobile and others Windows CE platforms and home PC.

Beam

Data transfer used for infra red communication and data transfer between devices..

Bluetooth

Powered by collaboration giants Ericsson, IBM, Intel, Nokia i Toshiba.This data transfer type becomes standard for linkage between wide range of devices. It uses radio frequency in 2.4 GHz spectrum range.

Digital Certificate

Digital Certificate is public key between sides in rellations.

Digital signature

sends to sender information that data has been delivered to recipient and that data was not been changed during transfer or digital sign.

Direct Push technology

"Push" is capabillity of e-mail server to "push" e-mail to device soon as it comes to server. Server sends to device service message that e-mail arrived on server,automaticly connect to device and synchronise with it.

EDGE

Means : "Enhanced Data Rates for GSM Evolution". Technology with extra-modulation used for GSM and TDMA networks. EDGE is integral part of migration from GSM and TDMA networks on 3G. EDGE has been developed for data speeds at maximum of 384 Kbp/s, but in reallity data transfers are much slower..about 64 Kbp/s. EDGE is used for providers who does not have UMTS licence.

Encription

Coding data process used to dissable unauthorised users to see coded data.

GPRS

"General Packet Radio Systems". GPRS is protocol for data transfer used in 2.5G networks with speeds app. 40 kbp/s.

GSM

"Global system for Mobile Communications", GSM has world wide use,but not so popular in the USA..

HSDPA

"High Speed Downlink Packet Access", upgrade of UMTS network with very low latency and high speed transfer about 3.6 MBp/s.


IMAP4

"Internet Message Access Protocol".This is e-mail protocol and it has advantage use for operations such as leaviung messages on server,taking only headers of messages before getting complete message....

MMS

"Multimedia Message Service", method for audio-video-graphic transfer through network.It uses WAP protocol.


PPC

Pocket Personal Computer (Pocket PC).

SIM

"Subscriber Identity Module".Programibille card with identification key of user for specific provider.SIM card is essential part of GSM network security.

SMS

"Short Message Service".textual communication service used in GSM networks and providers...Very popular way of communication.


Streaming

Technical expression for audio-video transfer on the internet.. Picture and sound are sent to user like a data stream.

Synchronisation

Data transfer between pared devices.

USIM

"Universal Subscriber Identity Module". Advanced version of SIM card used in GSM networks, USIM has advanced capabillities and it is designed to be used in 3G networks.

Wi-Fi

"wireless fidelity" is used for specific types of wireless local networks (WLAN) with specification IEEE 802.11 standard. Wi-Fi has use instead wired LAN. Without special transmitters and antenaes range is about 100 meters. Today there are a lot of hotels and public institutions which have own WIFI networks known as "hotspots".