Works with Digital Subscriber Line (DSL), cable modems and other Ethernet connections. Connects directly to your broadband Internet connection and does not require a PC to be turned on to make or receive calls. Use up to 2 devices (2 phones or 1 phone and 1 fax) BUILT IN ROUTER (connect directly to DSL or Cable modem and other PC's to PC port and voice traffic is prioritized) BUILT IN DHCP SERVER 110 / 220 v for overseas purchasers