The 3Com 11Mbps wireless LAN PC Card's special retractable XJACK antenna may help conserve power, but it does little for performance or range. In CNET Labs' tests, the card netted 4.6Mbps, roughly ...

If this wireless card is disabled, the antenna integrated into the component won't detect Wi-Fi signals broadcast from the router, preventing the PC from seeing or connecting to the company network.