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D7 Expansion Module

High performance, high resolution, easy-to-use expansion module

An expansion module provides users who experience high call coverage with greater flexibility and increased productivity. The D7 expansion module enhances the 700 series by adding 18 programmable keys with LEDs to deliver features such as line, speed dial, busy lamp field and presence indication.

The high-resolution display provides a visual interface. The D7 connects to the telephone using a USB cable, and up to 3 expansion modules can be daisy chained to add 54 function keys. The final D7 in the chain provides a USB port to connect other peripheral devices such as a USB headset.  When more than one D7 is used with a telephone, additional external power is needed.


Quick Summary

  • Supports all 700 series telephones with USB ports
  • High-resolution graphical display with backlight
  • 18 freely programmable multicolor LED function keys
  • Dual-angle foot stand: 46° and 28°
  • Fully configurable via host phone
  • 18 highly configurable self-labelling LED keys
  • High-resolution black & white display with backlight
  • Daisy chain up to 3 modules
  • Plug and play
  • Power supplied by phone via USB port for first D7 module

General Information

  • 18 programmable keys
  • Dimensions without footstand: 158 x 140 x 40mm (LxWxD)
  • Dimensions with footstand: 158 x 140 x 200/220 mm (LxWxD)
  • Weight (approx.): device 400g, footstand 120g
  • Input voltage: 5Vdc (SELV)
  • Power supply: USB for first D7 unit
  • External Power:  5Vdc power adapter, 10 Watts (available separately)


  • Plug and Play
  • Completely configurable via host phone


  • USB 2.0 cable with angled type A plug
  • USB 2.0 port, type A

Environmental Conditions

  • Ambient temperature: 0°C to 35°C (32°F to 95°F)
  • Non-operational: -10°C to 45°C (14°F to 113°F)
  • Humidity: 5% to 95% (non-condensing)

Included in Delivery

  • Base unit
  • Foot stand
  • Quick Start Guide
  • Color: Anthracite gray or black
  • Warranty: 2 Years


  • CE Mark
  • FCC Class B
  • Safety IEC 60950, CB


  • All Snom 700 series phones with USB ports