Terms Glossary S Single-Carrier Radio Transmission Technology
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Single-Carrier Radio Transmission Technology (1xRTT )

Single-Carrier Radio Transmission Technology (1xRTT) is an operational mode for CDMA2000 wireless communications that specifies a single (1x) 1.25MHz channel for data transfer.
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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 (Kb/s) although in practice the highest attainable speed is more like 80 Kbps. Versions of CDMA2000 have been developed by Ericsson and Qualcomm.
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