Sony PCG-FXA49 - Manual (Page 59)

Expanding Your Notebook Capabilities
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You can also connect your Access Point to a telephone line, Integrated Services
Digital Network (ISDN) router, cable modem, or Digital Subscriber Line (xDSL)
modem to share access to the Internet among multiple computers.
Wireless LAN PC Card
The Wireless LAN PC Card, which comes with the Wireless LAN Access Point,
can be purchased separately and is designed for building a wireless LAN
environment. You can use the Wireless LAN PC Card with or without the Access
Point. With the Access Point, you can build a wireless LAN between computers
that are equipped with the Wireless LAN PC Card and gain access to the Internet.
Without the Access Point, you can achieve direct communication (Peer-to-Peer
mode) between computers.
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For more information on Sony VAIO® Wireless LAN, go to
http://www.sonystyle.com/wirelesslan.