Ideal For: A Session Initiation Protocol (SIP) - used for initiating, maintaining, and terminating real-time sessions that include voice, video and messaging applications - Best used in small conference rooms and in executive offices. Life-Like Call Clarity: Reduces listener fatigue by turning ordinary conference calls into crystal-clear interactive conversations. Delivers high-fidelity audio capturing both the deeper lows and higher frequencies of the human voice for conference calls that sound as natural as being there. HD Voice: Delivers high-fidelity audio up to 7kHz, for conference calls that sound as natural as being there. Other Features: Local feature-rich GUI, Time and date display, Corporate Directory Access (search, dial, save to local directory), Convenient volume adjustment keys, User-configurable contact directory and call history (missed, placed, and received), Customizable call progress tones, & Wav file support for call progress tones. Compatibility: Warranty - 1 year. Product ships with - Conference Phone Console, 25 foot Ethernet cable & Quick Start Guide. Power - IEEE 802.3af Power over Ethernet (built in), Optional external universal AC power supply kit: 100-240V, 0.4A, 48V/19W.