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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 ?
QUALCOMM Incorporated (NASDAQ: QCOM), has unveiled the world's only single-chip solution for CDMA2000 1X, which integrates a baseband modem, radio transceiver, power management and multimedia engines into a single chip; and the industry's first CDMA2000 1X radio transceiver -- a component of this single-chip -- a radioOne solution that combines radio receiver and transmitter functionalities into a single design using cost-effective RF CMOS (Complementary Metal Oxide Semiconductor) process technology.
has begun deployment of VIVO's CDMA2000 1X network in Bahia that will bring high-speed data service and Internet access to an estimated nine million people.
Lucent Technologies (NYSE:LU) has successfully completed an expansion of the SKYLINK network for Delta Telecom (Delta), the first Russian mobile operator to implement a third-generation (3G) mobile network in the 450 MHz frequency band based on CDMA2000 1X technology.
Verizon Wireless Puerto Rico, a wireless telecommunications operator on the island, has commercially launched its Express Network, a CDMA2000 1X voice and high-speed data network using equipment, software and services from Lucent Technologies (NYSE:LU).
SZ), a leading global provider of telecommunications equipment and network solutions, today announced it has successfully completed the world's first CDMA2000 1x Advanced call based on CDMA2000 1x system.
NYSE:MOT) has begun deployment of VIVO's CDMA2000 1X network in Bahia that will bring high-speed data service and Internet access to an estimated nine million people.
KDDI launched its CDMA2000 1X voice and data service on April 1, 2002, on an all Motorola supplied wireless radio access network.
QUALCOMM Incorporated (Nasdaq: QCOM), has announced that CDMA operators in North America have begun receiving volume shipments of a range of third-generation (3G) CDMA2000 1X products, based on the QUALCOMM CDMA Technologies (QCT) MSM5105 Mobile Station Modem (MSM) chipset, system software and integrated applications software.
The product supports CDMA2000 1X, CDMA2000 1xEV-DO Revision 0 and CDMA2000 1xEV-DO Revision A technology, as well as IP (Internet Protocol) backhaul capabilities.
During network trials, Motorola's CDMA2000 1x EV-DO solution supported peak data rates of up to 2.
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.
We are proud to see the strong and widespread market acceptance of CDMA2000 1X technology using the MSM5100 chipset and system software solution, which brings to market its accurate position location and advanced multimedia features.