1xRTT - Computer Definition
The initial version of CDMA2000, with onetimes referring to standard channel width). See CDMA2000.
(1x Radio Transmission Technology) The first data service offered for CDMA carriers such as Verizon and Sprint. It was superseded by the EV-DO data technology, but devices may fall back to 1xRTT if necessary. See CDMA2000.