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Here are the most common UMTS related abbreviations. If you cannot find here what you are looking for try telecoms reference glossary mpirical companion.

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CEPT Conférence Européenne des Administrations des Postes et des Télecommunications

CDMA Code Division Multiple Access. The code division technology was originally developed for military use over 30 years ago. CDMA is a multiple access technique, which uses code sequences as traffic channels within common radio channels – used for cdmaOne (IS-95) air interface.

cdmaOne (IS-95) A second-generation digital air interface technology pioneered by US firm Qualcomm and further developed in South Korea

ECTRA European Committee on Telecommunications Regulatory Affairs

EDGE Enhanced Data Rates for GSM Evolution

ERC European Radio Committee

ERO European Radiocommunications Office of CEPT

ETSI European Telecommunications Standards Institute

FDD Frequency Division Duplex

GPRS General Packet Radio Service

GSM Global Standard for Mobile Communications

HSCSD High Speed Circuit Switched Data

IMT-2000 The term used by the International Telecommunications Union for the specification for the projected third-generation wireless services. Formerly referred to as FPLMTS, Future Public Land-Mobile Telephone Systems

IN Intelligent Network, A capability in the public telecom network environment that allows new services such as "free phone" or televoting to be developed quickly and introduced on any scale, from a local trial to network-wide. Also implies a well-developed network infrastructure

IP Internet Protocol

ITU International Telecommunication Union

PCN Personal Communications Networks

PCS Personal Communications Service. A generic term for a mass-market mobile personal communications service, independent of the technology used to provide it

PDC Personal Digital Cellular. The digital wireless standard used in Japan. Uses TDMA air interface

TDD Time Division Duplex

TDMA Time Division Multiple Access. A digital transmission technique used for GSM, D-AMPS (IS-136) and PDC air interfaces. D-AMPS in North America is often called just TDMA

UMTS Universal Mobile Telecommunications System

UTRA UMTS Terrestrial Radio Access

UTRAN UMTS Terrestrial Radio Access Network

VHE Virtual Home Environment

WAP Wireless Application Protocol

WCDMA Wideband CDMA: The air interface technology selected by the major Japanese mobile communications operators, and in January 1998 by ETSI, for wideband wireless access to support third-generation services. This technology is optimized to allow very high-speed multimedia services such as full-motion video, Internet access and videoconferencing

WLL WLL Wireless Local Loop. A radio access technology that links subscribers into a fixed public telecom network. The radio link replaces the traditional wired local loop

WRC World Radio Conference

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