CDMA is short for code division multiple access. It is the technology used for transferring data, voice and signal information between cellular sites and cell phones. 1xRTT is a version of CDMA that uses a pair of 1.25MHz radio channels.
CDMA was originally used during World War II by the British allies for foiling the German from jamming transmissions. Qualcomm was the company that had created the chips for CDMA and were then later able to develope this technology as we know it and commercialize it.
CDMA is not as fast as EVDO but is a very efficient method of transferring signals both voice and data. Peak data speeds are up tp 144Kbps.
1xRTT is used in the United States by a variety of carriers such as Sprint and Verizon, and in Canada by Telus Mobility and Bell Mobility.
