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Enhancements to the CDMA cellular technology that increase the number of users on a voice circuit and provides high-speed packet data. In 2000, CDMA2000 was the first 3G technology to be deployed as part of the ITU's IMT-2000 framework (see IMT-2000). By 2009, the CDMA Development Group (CDG) reported more than 440 million CDMA2000 subscribers worldwide.

CDMA2000 1x
The first version of CDMA2000 enables up to 100 callers to share a single 1.25 MHz CDMA channel and provies a peak data rate of 153 Kbps. The use of the single channel is known as "1X" or "1xRTT" (1x Radio Transmission Technology). 1X has also been known as "IS-2000," "MC-1x," and "IMT-CDMA MultiCarrier 1x."

Evolution-Data Optimized (EV-DO) technology increased the peak data rate first to 2.45 Mbps and later to 3.1 Mbps per channel, with the average user experiencing from 500 to 800 Kbps. For more details, see EV-DO. See CDMA, CDMA450, WCDMA, LTE and cellular generations.

1X Signal Strength
The "1X" is the 1xRTT signal strength on this cellphone, which is only one bar at this moment. The "EV" signal, also one bar, is the EV-DO channel. As the phone travels, the strength of the two signals may differ.

References in periodicals archive ?
A mobile broadband network to over 500 cities, introduced more than 600 CDMA2000 1X and EV-DO devices from 160 manufacturers, and expanded its customer base to more than 50 million people.
We are very pleased to have won Hong Kong's CDMA2000 license," said Richard Midgett, Managing Director of Mobility at PCCW.
SISVEL has discussed with parties holding essential CDMA2000 patents to advance the process of structuring a joint license to make essential CDMA2000 patents easily accessible to all users on fair, reasonable, and non-discriminatory terms.
The CDMA2000 1X standard, operating in the 450 MHz frequency band, is an approved mobile technology for deployment in Russia where this spectrum is currently used by older analog NMT-450 cellular networks.
CDMA2000 has proven to be the best solution for serving the diverse needs of affluent subscribers in the densely populated urban areas of Indonesia, as well as the basic needs of those users with limited purchasing power in the sparsely populated rural areas of the country.
This new end-to-end solution allows for complete re-use of existing investments in CDMA2000 1X and/or CDMA2000 1xEV-DO networks while providing a smooth migration to Revision D, fully coordinated with CDMA2000 1xEV-DO.
Innovation is the common bond that all CDMA2000 operators share," said Tim Donahue, executive chairman for Sprint Nextel (NYSE: S) and host of the CDMA Operators' Summit.
We are proud to be the first operator in Japan to deploy a commercial CDMA2000 1xEV-DO network," said Tadashi Onodera, president of KDDI Corporation.
Other manufacturers expected to roll out CDMA2000 1X data products include AirPrime (AirPrime Helium 1X wireless module family), GTRAN (DotSurfer with single- and dual-band versions) and Novatel Wireless (Merlin C201).
As the world's leading CDMA2000 network infrastructure supplier, we're excited to team up with Sprint and QUALCOMM to deliver push-to-talk services to Sprint customers nationwide," said Chuck Naylor, vice president of sales for Lucent.
Under the new agreement, Lucent will further increase the capacity and coverage of EVNTelecom's network in the northern provinces and also deploy a CDMA2000 1xEV-DO network, which will enable EVNTelecom to offer new mobile high-speed data services such as Internet access, e-mail and high-quality video clips of news, sports and entertainment events at speeds of up to 2.
Mobile operators that evolve their current-generation (cdmaOne(TM)) networks to CDMA2000 will have the capability to double their network's voice capacity and increase data-transmission speeds nearly 10 times.