D110 is a v.92 modem. And your ISP needs to support v.92 and you need call waiting on the phone line. You also need the Modem On hold software on dell's site. You won't be able to use the internet at the same time while you talk but you'll be able to pause the internet to answer the call. The problem with this set up is that when a phone call comes in while you're online, your external phones DO NOT RING only your computer speaker if you have it set up that way. In addition you have to run you your computer to tell it to pick up the phone. This is annoying. So I suggest you do as I do for which you only need a v.92 modem and call waiting on your phone line: enter the +PCW=1 string in your modem driver. That way, whenever a phone call comes in while you're online, the modem will detect it automatically disconnect and your phones will rign normally.