Yes the Draytek Vigor 2820N comes with a built in modem so you can just connect your ADSL line straight to the unit, this will mean it will replace your current modem and also create more desk/floor space. It also supports up to two ADSL lines coming into the router so you can do load balancing between the two. However you will need an additional modem if you plan to connect an additional line for more speed. The best modem to use with the Vigor 2820N is the Vigor110 modem.