Polycom VVX 311. Certified Refurbished Includes 90 Day Warranty . . The Polycom VVX 311makes more efficient and productive calls with the unparalleled voice clarity as a simple-to-use business media phone. With its HD voice up to 7KHz on all audio paths and improve productivity for cubicle worker?s and call center operators make it which make it intuitive with easy to use user interface. The phone is equipped with great features including 6 lines, Asian character support, Dual Gigabit Ethernet switch, backlit grayscale graphical LCD and supports VVX expansion module and VVX color expansion module. VVX 311: . . |Speakerphone |Multilingual Menu Support (Chinese, Danish, Dutch, English, French, German, Italian, Japanese, Korean, Norwegian, Portuguese, Russian, Spanish, Swedish) |Hearing Aid Compatible |Acoustic Clarity Technology |High Definition Audio Technology |Remote Missed Call Notification |One-Touch Redial |Call Timer |IEEE 802.3af Power over Ethernet (PoE) Support|Optional AC Adapter (Not Included) |Do Not Disturb |Call Transfer |Call Forwarding |Call Waiting |One-Touch Speed Dial |SIP Voice Over Internet Protocol (VoIP) |6-Line Operation |Dual-Port Gigabit Ethernet Switch |Corded Voice Over IP Phone |12 Predefined Hard Keys |Call Hold / Call Wait |Mute |RJ-9 Headset Jack |Backlit LCD Display |Dual-Port 10/100/1000 Mbps Ethernet Switch