So, after taking in all of that you might want to start
HERE. Google is your friend. You are looking for USB to telephone handset adapters. Keep in mind that all telephones are not the same. Handsets differ electrically from one to another even though they may look the same and use the same curley cord and the same plugs. (Notice I didn't call them RJ-9s
) Because handsets often aren't interchangeable, it's important to realize that whatever adapter you choose needs to be made to work with your particular phone.
-Hal
