Speakerbox – USB Audio Device for Hands-free communication

Voice Communication Dispatching Device 

The Speakerbox (also referred to as InterCom) is a member of the modular FREE / FREE+ / BeFREE (also referred to as FREE) product family. It is a USB audio device for hands-free bidirectional voice communication, which can be combined with the other family members into multifunctional consoles for various applications.

  • Add-on module or standalone device
  • Combination of a USB audio device and an HID keyboard
  • Plug&play operation with generic drivers
  • Stereo loudspeakers and goose-neck microphone
  • Separate alert/alarm audio output
  • Connection for an external analogue headset and handset
  • Incremental encoder (endless potentiometer) for volume control
  • Three-colour bar-graph display as VU meter and/or volume indicator
  • Six programmable keys with LED indicators for mode control and volume adjustment
  • Analogue front-end designed to meet wide-band IP telephony standards
  • Programmable signal processing includes ambient noise suppression (noise gating), signal compression and limiting
  • Integrated acoustic shock protection
  • Optional HID telephony interface
  • Optional echo-canceller with a digital signal processor
  • Dispatcher terminals
  • Banking & trading consoles
  • Multifunctional control panels
  • Digital telephony (e.g. Voice over IP) devices


  • Stereo loudspeakers (Left and Right, 2 x 2 x 1W) with volume control encoder
  • Goose-neck microphone with illuminated PTT key
  • USB audio device
  • HID telephony interface supported
  • Optional echo-canceller with a digital signal processor

Programmable Keys – User Configurable

  • 6 single keys with LED indicator
  • Various combinations of single, double and blind keys

Modular & Programmable

  • Can be combined with other modules from FREE family, e.g. Handset, keyboard
  • Keys can be programmed as keyboard emulation, HID Telephony events
  • Audio settings can be programmed (volume settings, microphone sensitivity, PTT/PTM, HOOK events, etc)
  • All settings stored in hardware, configuration software: ChangeMe
  • Hardware Echo Cancellation
    For use with duplex audio, in case no echo cancellation is present in software, we offer an optional hardware echo canceler.
  • Handset
    Because of the modular design, the Speakerbox can be combined with one or more Handsets on the left or right side. The handset can be either:

    • USB; Besides the Handsfree audio, this offers an extra, independent, voice channel
    • Analog Switching; There is one audio (voice) channel that switches automatically from Handsfree to Handset when lifting the Handset.
  • Keyboard
    If more shortcut keys are needed, a programmable keyboard can be added to the Speakerbox.

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