I may be completely wrong here, but it sounds like you have a router in place but wish to go wireless. If that is the case, you can remove the current router and buy yourself a wireless router as a replacement.
The wireless router will have at least 1 ethernet port on the back for wired connection (if required).
Having Googled the router you have, it shows a wired router that can be replaced quite easily.
It's worth looking into your current supplier as they may provide a wireless router free of charge on the basis that you re-new a contract with them.
It would be a good idea to post back here with details of your current supplier, and what your wireless requirements are (around the home or just in one room, or additional connectivity).
Any problems with what I have posted, please come back with as much detail as possible. You'll be assured of a more detailed response from myself or others.
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