Do I need to buy a modem separately for this router?

Wow, thanks for the responses y'all.  I was pretty desperate. I'd tried to find help on Netgear, this community and called my provider, googled, even called my brother who is a computer engineer and knows a few things.  I made note of the fact that the old router and the new router looked EXACTLY THE SAME where the connections were, so I decided to keep trying.  I literally just kept clicking buttons until something worked.  I wound up coming in the back door so to speak and did a right click on the router icon in control panel and suddenly I was on the right page and the router was connecting.  So, thanks, I got it set up, don't need a modem for my Atlink, it just needed to be set up correctly and I guess I stumbled upon the place to get it accomplished. Sheesh!!