Cdma2000 is the commercial name for the IMT-2000 CDMA Multicarrier (MC-CDMA) standard developed through the 3GPP2 standards organization of the ITU. It is an evolving family of cellular networking specifications that offers enhanced voice and data capacity over cdmaOne. The family includes 1xRTT, EV-DO, EV-DO Rev. A, EV-DO Rev. B and EV-DO Rev. C.