Nortel NTDU91 i2002 IP Phone (Charcoal/Refurbished)Key Features: Mfr. Part#: NTDU91 Nortel i2002 IP Phone Integrated LCD Display Four programmable feature keys Four line memory buttons Four way navigation cluster for LCD content Integrated high quality speakerphone Integrated headset jack Visual ringing alert message waiting LED Desk or wall mountable Fixed feature keys include Hold, Goodbye, Mute, Volume Up Down, Services, Expand to PC, Inbox and Outbox, Headset, Handsfree Field upgradeable firmware