Four lines with backlit 320 x 160-pixel grayscale graphical LCD
Interoperability with leading SIP-based IP PBX and Softswitch platforms
Polycom HD Voice technology, including support of G.722 wideband codec, Acoustic Clarity Technology 2, and a systems design optimized for Polycom HD Voice technology
Advanced functionality, including shared lines, busy lamp field, presence, and XHTML application
