IMT-2000

IMT-2000 (International Mobile Telecommunications-2000) is the global standard for third generation (3G) wireless communications as defined by the International Telecommunication Union.

In 1999 ITU approved five radio interfaces for IMT-2000 as a part of the ITU-R M.1457 Recommendation. The five standards are: IMT-2000 CDMA Direct Spread also known as W-CDMA, used in UMTS, the successor to GSM IMT-2000 CDMA Multi-Carrier also known as CDMA2000, the successor to 2G CDMA (IS-95) IMT-2000 CDMA TDD also known as TD-SCDMA IMT-2000 TDMA Single Carrier also known as EDGE, an intermediate 2.5G technology IMT-2000 FDMA/TDMA also known as DECT