The D3 Expansion Module provides an additional 18 multicolored LED keys that can be programmed for functions such as line, speed dial, busy lamp field and presence indication. A multicolored LED key presents call or presence status, and the high-resolution display provides a visual interface that can be easily configured and labelled via the phone’s web interface or directly on the phone itself.

• 18 highly configurable, self-labelling, multicolored LED keys
• High-resolution black and white display with backlight
• Daisy-chain up to 3 modules (54 function keys)
• Plug and play
• Power supplied from phone via USB port