-6 lines (standalone) / 20 lines (with one Expansion Module)
-Integrated PoE support
-Polycom HD voice for all audio paths with Polycom Acoustic Clarity™ 2 technology
-320 x 160 pixel backlit grayscale graphical LCD
-26 dedicated hard keys, 4 context-sensitive soft keys
-Support of up to three Expansion modules
-USB for local call recording
-Two-port 10/100 Ethernet switch
-PoE only