The 5602D is a VoIP enabled telephone terminal with all the features of the 5601. It also has 9 fixed feature keys and a 2 line x 24 character display as well as a call monitor speaker. It plugs directly into a VoIP enabled LAN using the built-in Ethernet port, and has a built-in 2 port 10/100 BaseT Ethernet switch, allowing a PC to connect to a LAN via the phone.