Polycom SoundPoint IP Backlit Expansion Module 

• 160x320 pixel graphical grayscale LCD
• 14 illuminated keys configurable as a line appearance or a speed dial with busy lamp field (BLF)
• Hot swappable – can be added to or removed from an idle host phone at any time
• No extra cables or power supplies are required
• Plug-and-play – requires no set-up as power and signaling are provided by the host phone
• User-friendly call visualization similar to that on the SoundPoint® IP 601 and 650