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U-W
USIM
Universal Subscriber Identity Module (Universal SIM). An upgrade of the SIM
card (generally used under GSM) to enable use with IMT-2000.
US-TDMA/1S 36
A second generation system used in the US. Also referred to as D-AMPS
(Digital AMPS). First digital system adopted in the US and covers the entire
country.
UTRA
UMTS Terrestrial Radio Access. Often applied with identical meaning of
WCDMA-DS.
UTRAN
UMTS Terrestrial Radio Access Network. UTRAN is a conceptual term
identifying that part of the network which consists of Radio Network
Controllers and Node Base stations.
VOIP
Voice over Internet Protocol. VolP is not simply for voice over IP, but is
designed to accommodate two-way video conferencing and application
sharing as well. Based on IP technology, VoIP is used to transfer a wide range
of different type traffic.
W3C
World Wide Web Consortium. A sector-wide body which promotes
standardisation of WWW technology. Major Internet related vendors are
consortium members, and to date the body has standardised a range of
crucial technologies including HTTP, HTML, XML, etc.
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