That doesn't mean, however, that 802.20 technology is outgunned. The initial version of WiMAX won't support mobile users while Nextel says that's precisely the target for its trials in North Carolina. In addition, the venture arm of T-Mobile has invested in Flarion, according to that company's Web site, and trials of the technology are about to be launched by Korea Telecom. The technology has also, in the past, received support from Cisco, Motorola and Hewlett-Packard.
802.20 operates in licensed bands below 3.5 GHz, compared to licensed use of licensed bands between 2 and 6 GHz used by 802.16. Both technologies claim low latency, which enables access to corporate networks via virtual private networks as well as use of real-time applications such as voice-over-IP.
Nextel's service requires use of either a PC card or a standalone modem, which the company will provide to those who participate in the trials. Beyond information on its Web site, Nextel provided no information about when the service would be widely available or what it will cost, although it said that after the North Carolina trial is completed, users there can sign up to continue using the service.
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