7. CDMA
Code Division Multiple Access (CDMA) is a digital wireless technology that was pioneered and commercially developed by Qualcomm.
CDMA works by converting speech into digital information, which is then transmitted as a radio signal over a wireless network. Using a unique code to distinguish each different call, CDMA enables many more people to share the airwaves at the same time - without static, cross-talk or interference.
In 1999, the International Telecommunications Union selected CDMA as the industry standard for new "third-generation" (3G) wireless systems. Many leading wireless carriers are now building or upgrading to 3G CDMA networks in order to provide more capacity for voice traffic, along with high-speed data capabilities.
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got feedback?by shaner 
last modified: 2003-05-22 23:48:41
1xRTT is short for single carrier (1x) radio transmission technology, a 3G wireless technology based on the CDMA platform. It is a new Data transfer technology that can give speeds of up to 86kb's per second. This service is unique because instead of being billed by the time spent online, you're actually billed for the amount of data you transfer through the network. This improvement for wireless data is similar to going from dial-up to highspeed service. When data is not being actively transferred, the 1x Data service becomes dormant and a virtual connection to the network is maintained. This , allows you to still receive voice calls or text messages on your cellphone. When you are ready to resume the data session, you can re-engage the network connections immediately.
Not only will 1x improve data transfer, it also allows for more user network capacity and longer battery life. All of Bell Mobility's current phones support the 1x network.
1xRTT is also referred to as CDMA2000.
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got feedback?by shaner
last modified: 2005-05-17 19:49:50
