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.{{cite web |title=What is IMT-2000 |url=https://www.itu.int/osg/imt-project/docs/What_is_IMT2000-2.pdf |access-date=4 March 2022 |website=ITU |archive-date=12 October 2022 |archive-url=https://web.archive.org/web/20221012191754/https://www.itu.int/osg/imt-project/docs/What_is_IMT2000-2.pdf |url-status=bot: unknown }}{{cite web |title=IMT-2000 |url=https://networkencyclopedia.com/imt-2000/ |website=Network Encyclopedia |date=8 September 2019 |access-date=4 March 2022}}{{cite web |title=IMT-2000 Network Architecture |url=https://www.fujitsu.com/downloads/MAG/vol38-2/paper03.pdf |website=Fujitsu |access-date=4 March 2022}}

In 1999 ITU approved five radio interfaces for IMT-2000 as a part of the ITU-R M.1457 Recommendation.{{cite web |title=M.1457 : Detailed specifications of the terrestrial radio interfaces of International Mobile Telecommunications-2000 (IMT-2000) |url=https://www.itu.int/rec/R-REC-M.1457 |website=ITU |access-date=4 March 2022}} The five standards are:{{cite web |title=ITU-2000 |url=https://www.3g4g.co.uk/Faq/imt2000.html |website=3G4G Wireless Resource Centre |access-date=4 March 2022}}

• 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

To meet the IMT-2000 standards, a system must provide peak data rates of at 384 kbit/s for mobile stations and 2 Mbit/s for fixed stations.{{cite web |title=3G Consultation Qualcomm |url=https://www.ofca.gov.hk/filemanager/ofca/en/content_1349/3G-consultation-Qualcomm.pdf |website=Office of the Communications Authority HK |access-date=4 March 2022}}{{cite web|url=http://www.projectsatbangalore.com/3G-network/|title=3G CELLULAR STANDARDS WITH PATENTS|date=2014-06-24|website=projectsatbangalore.com|language=en|access-date=2019-08-17}}{{Cite web |date=15 March 1999 |title=ITU-T Rec. Q.1701 (03/99) Framework for IMT-2000 networks |url=https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-Q.1701-199903-I!!PDF-E |access-date=2022-03-23 |website=International Telecommunication Union |format=PDF |quote=...At least 384 kbit/s in outdoor to indoor and pedestrian radio environments, BER ≤ 10⁻⁶, both for circuit and packet services...At least 2048 kbit/s in indoor office radio environment, BER ≤ 10⁻⁶, both for circuit and packet services...}}{{Cite web |last=Segan |first=Sascha |date=2015-02-10 |title=3G vs. 4G: What's the Difference? |url=https://www.pcmag.com/news/293905/3g-vs-4g-whats-the-difference |access-date=2019-08-17 |website=PCMAG |language=en |quote=With minimum consistent Internet speeds of 144 Kbps, 3G was supposed to bring 'mobile broadband.'}}