- VoIP NEC I-SIP Multi-Line Telephone for SL2100 - Supports Ethernet Gigabit Speed (Full Duplex) - 8 Programmable Keys Visible at a Time (May Scroll Up to 32) - Programmable Button Labels - Powered via POE - Full Duplex Speakerphone - Elegantly designed and feature-packed - Customizable to meet employees� specific communications needs - Supports a wide-range of applications which can help improve overall employee efficiency and productivity - Delivers maximum deployment flexibility and investment protection - Easy to use intuitive interface and an interactive user manual