ave invested heavily in 3G licenses and infrastructure-over $100 Billion globally-in order to offer new IP- based services that support voice, video and data. Mobile video will be one of many bandwidth intensive applications that are planned to become a core part of the mobile communications infrastructure. Video Communications: The Whole Picture Figure 9-1: Wireless and Cellular Radio Technologies Terminology Definition 1xRTT Single Carrier (1x) Radio Transmission Technology, a 2.5G developed by Qualcomm referred to as CDMA2000-1x, or errantly as 3G or 3G1x, the current technology used by Sprint and Verizon in the US, offering mobile data rates up to 144Kbps CDMA 2000 IMT-CDMA, the CDMA version of the IMT-2000 standard developed by the ITU can support mobile data communications at speeds ranging from 144 Kbps to 2 Mbps. Enhanced Data for Global Evolution, broadband wireless technology used or planned by AT&T Wireless, Cingular and T-Mobile, interim solution for GSM networks between GPRS and UMTS. Evolution-Data Only (1xEV-DO), part of a family of cdma2000 1x digital wireless standards, it is a 3G standard based on technology initially known as "HDR" (High Data Rate) or "HRPD" (High Rate Packet Data), developed by Qualcomm. The international standard is known as IS-856. EV-DO Unlike other "1x" standards, EV-DO only addresses data not voice. It requires a dedicated slice of spectrum, separate from voice networks using standards such as 1xRTT. 1xEV-DO offers very high data rates up to 2.4 mbps averaging 300-600 kbps in the real world. It is much faster than the 50-80 kbps typically offered by 1xRTT technology. Currently available. Evolution, Data and Voice, addresses both data and voice, unlike 1xEV-DO, which only addresses data. Combines the high-speed EV-DV HDR technology from 1xEV-DO with the widely deployed 1xRTT standard. It integrates seamlessly with 1xRTT, providing full backward-compatibility and simultaneous voice and data. Freedom of Mobile Multimedia Access, DoCoMo's brand name for 3G services based on t