Can you post a picture of what you have? Chances are that it's wired for phone (using cat5), in which case you would want a patch panel if you want to use it for ethernet, but we would need to see it to be sure.
You would also need to verify that all of your jacks have home-runs back to that location, and none of them are wired in series (which would work for phone, but not ethernet). To do that, count the jacks in your house and see if you have a matching number of cat5 cables...that should be good enough to assume they're home runs but you may also want to tone them out.