You will need a wireless router, or wireless access point. If you already have a router (non wireless), you can then add an access point. If you don't already have a router, then a router with wireless included is what you need. The router goes in between the modem and the PC or LAN.
As for the wireless bw4318. Are you sure that it isn't bcm4318?
Read through this stickied thread, and provide the info, so we can get the wireless to work. Wireless Setup - Start Here
If it is a bcm4318, you need to install firmware for it to work. The best way to do that is different, depending on the Linux distribution that you are using. So, please also tell us what distribution that it is you are using.
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Paul
Please do not PM me with requests for help. I will not reply.
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