1xRTT

1xRTT (Single-Carrier Radio Transmission Technology) is an operational mode for CDMA2000 wireless communications that specifies a single (1x) 1.25MHz channel for data transfer. 1xRTT was the first version of CDMA2000, which is the International Telecommunication Union's (ITU) CDMA (Code-Division Multiple Access ) implementation of the IMT-2000 standard. The theoretical network voice capacity of basic 1xRTT systems is approximately 144 kilobits per second ( Kbps ) although in practice the highest attainable speed is more like 80 Kbps. Versions of CDMA2000 have been developed by Ericsson and Qualcomm.

See also: EV-DO , HSDPA

Read more about it at: > WiseGeek outlines the distinction between 1xRTT and CDMA2000. > The CDMA Development Group provides information and updates concerning CDMA-related standards. > See a comparison of mobile technologies in our Fast Guide.

Last updated on: Dec 11, 2006

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