Snom D3 Expansion Module enhances functionality for compatible Snom D3xx series IP desk phones by providing an additional 18 highly configurable, multicoloured LED keys. Designed to connect seamlessly via USB, this module expands your call management capabilities with customizable function keys for lines, speed dials, busy lamp field (BLF), and presence indication.

• The module features a high-resolution monochrome backlit display enabling self-labelling of each key directly on the unit or through the phone’s web interface, eliminating the need for paper labels.
• Supports daisy-chaining of up to three modules, delivering up to 54 expanded function keys, ideal for intensive telephony environments.
• Power for the first module is supplied through the host phone’s USB port, while additional power supplies are required for secondary or tertiary modules in the chain.
• Each module includes a USB port allowing connection of additional USB peripherals (headsets, dongles) on the last module in the chain.

For detailed technical information, configuration guides, and firmware updates, refer to the official [Snom product page](https://www.snom.com/en/products/desk-phones/end-of-sales-deskphones/snom-d3/).

Key Features:

• 18 programmable multicoloured LED keys with call status indication


• High-resolution black-and-white backlit display for dynamic key labelling


• Daisy-chain support up to 3 modules (54 keys total)


• USB powered with additional PSU needed for multiple modules


• Easy configuration via phone interface or web browser


• USB passthrough port on each module for peripheral devices


• Compatible with Snom D3xx series phones