The WAN: Undergoing an upgrade

摘要

The three leading wireless carriers are all in the process of rolling out 3G networks. For Sprint Nextel and Verizon, 3G involves an upgrade from the Code Division Multiple Access 1x (CDMA) network for data to 1x Evolution Data Optimized (EV-DO). For Cingular, which supports GSM technology, it means evolving from Enhanced Data rates for GSM Evolution (EDGE) to High Speed Download Packet Access (HSDPA).