Editing CDMA2000 (section)

{{Short description|Family of 3G mobile technology standards}}
{{About|the mobile phone technology|the channel access method|Code-division multiple access}}
{{Use mdy dates|date=November 2014}}

[[File:Huawei EC226 with USB cable (3384718751).jpg|thumb|[[Huawei]] CDMA2000 [[EVDO]] USB [[wireless modem]] (2009)]]

'''CDMA2000++''' (also known as '''C2K''' or '''IMT Multi‑Carrier''' ('''IMT‑MC''')) is a family of [[3G]]<ref>{{cite web
| url = http://www.itu.int/ITU-D/imt-2000/DocumentsIMT2000/What_really_3G.pdf
| title = What really is a Third Generation (3G) Mobile Technology
| access-date = October 28, 2012 | publisher = International Telecommunication Union
| archive-url = https://web.archive.org/web/20110607105523/http://www.itu.int/ITU-D/imt-2000/DocumentsIMT2000/What_really_3G.pdf
| archive-date = June 7, 2011
}}</ref> mobile technology standards for sending voice, data, and [[Signaling (telecommunications)|signaling]] data between [[mobile phone]]s and [[cell site]]s. It is developed by [[3GPP2]] as a backwards-compatible successor to [[2G|second-generation]] [[cdmaOne]] (IS-95) set of standards and used especially in North America and South Korea.

CDMA2000 compares to [[UMTS]], a competing set of [[3G]] standards, which is developed by [[3GPP]] and used in Europe, Japan, China, and Singapore.

The name CDMA2000 denotes a family of standards that represent the successive, evolutionary stages of the underlying technology. These are:
*Voice: CDMA2000 1xRTT, 1X Advanced
*Data: CDMA2000 1xEV-DO ([[Evolution-Data Optimized]]): Release 0, Revision A, Revision B, [[Ultra Mobile Broadband]] (UMB)

All are approved radio interfaces for the [[International Telecommunication Union|ITU]]'s [[IMT-2000]]. In the United States, ''CDMA2000'' is a registered trademark of the [[Telecommunications Industry Association]] (TIA-USA).<ref>[http://tess2.uspto.gov/bin/showfield?f=doc&state=4001:kets67.2.3 CDMA2000 trademark application] {{Webarchive|url=https://web.archive.org/web/20170113010120/http://tess2.uspto.gov/bin/showfield?f=doc&state=4001:kets67.2.3 |date=January 13, 2017 }}, uspto.gov, November 17, 2009</ref>