Do I Need A Modem. If you want an internet connection in your home, then you need either a Cable Modem or DSL Modem. To note: If you also get phone service through your ISP, the kind of thing where you're actually connecting a VOIP phone to your modem, then you'll probably need a more souped-up (and expensive) cable modem.
As such, the modem needs to convert these signals to digital, and vice versa. A modem is a converter between one data format and another. We've got tips on how to connect your computer to the internet.
Router/Modem Combo versus Individual Modems and Routers.
A modem brings internet into your house, while a router that directs that internet connection to all the computers, tablets, mobile phones and other connected devices you have Modems aren't one-size-fits-all solutions; the type of modem you'll need depends on the type of internet service you receive.
Most of the time, people will need both a modem and a router to get their homes online. So, do you need a new fiber internet modem? A modem is a converter between one data format and another.