Alcatel4039 30 DAY WARRANTY INCLUDEDThe Alcatel-Lucent 4039 Digital IP Phoneoperates in conjunction with two main software environments:OmniPCX Office (OXO) / OXO Connect: The communication server for small to medium businesses.OmniPCX Enterprise (OXE): The server platform for larger enterprises, which runs on a hardened Linux operating systemThe Alcatel-Lucent 4039 Digital Phone is a professional-grade desktop terminal from the Alcatel-Lucent 9 Series. It is specifically designed for high-call-volume office environments and requires a connection to an Alcatel-Lucent OmniPCX Office (OXO) or Enterprise (OXE) communication server to functionKey FeaturesAdjustable Display: Features a large monochrome graphical screen (pixels) with 4 levels of gray for clear visibility.Alphabetic Keypad: A full QWERTY/AZERTY keyboard at the base enables quick "call-by-name" directory searches.Intuitive Navigation: Includes a 4-way navigator key for scrolling through menus and 10 context-sensitive soft keys that change functions based on call status.Audio Quality: Equipped with a full-duplex speakerphone, high-quality audio with echo cancellation, and a "comfort handset" with a soft-grip finish.Expansion Ready: Supports up to three additional key modules (10, 14, or 40 keys) to manage more extensions or speed dials