Describe CDMA2000?
Answer: CDMA2000 (also termed as IMT Multicarrier (IMT-MC)) is a family of 3G mobile technology standards that use CDMA channel access, to send data, voice, and signaling data among mobile phones and cell sites. The set of standards comprises: CDMA2000 1X, CDMA2000 EV-DO Rev. 0, CDMA2000 EV-DO Rev. A, and CDMA2000 EV-DO Rev. B. All are accepted radio interfaces for ITU's IMT-2000.