Upgrade your companys phone system with help from the 7821 Two-Line IP Phone from Cisco . Equipped with a 3.5 graphical display, the 7821 IP phone comes equipped with programmable line keys, wideband audio support, multiple ring tones, and a full-duplex speakerphone. The wall-mountable phone features a two-port Gigabit Ethernet switch, while support for PoE (Power over Ethernet) means the phone can be connected to both data and power over a single cable.