Basic business phone with high audio quality, two-line graphical LCD display with backlight, menu-driven user interface and 6 programmable function keys, 2 lines expandable to 6, Built-in Full Duplex Speakerphone, 2 Ethernet ports and PoE in WAN port and three-party conference bridging. Feature rich, easy to use but sophisticated looking entry level business IP phone. We believe this VoIP phone has the most robust SIP implementation on the market and includes features most other phones do not have. Security, line appearance display, ENUM, Power over Ethernet, 2 Port switch, headset connector and much more.