Communications Management Unit


The Communications Management Unit (CMU) is a USB headset adapter which allows the use of professional air traffic control and/or dispatcher industry (PJ-7) headsets and handsets with any computer via the USB port. It features two twin jacks, which each support the WE-425, PJ7 or “310 connector”. The CMU requires no external power and supports PTT devices like the Plantronics SHS1890.

Includes CmuPTT,  a lightweight application that runs in the WINDOWS background.  It allows you to quickly map each PTT on the CMU to a keyboard “hotkey” or mouse button.  This is useful for integrating with a third-party voice communications program (such as Motorola Dispatch).

  • PJ7 connector, supports SHS-1890
  • Ideal for ATC Simulation or Emergency Dispatch Call Operations
  • Supports USB 2.0
  • Plug and Play with Windows 11, 10, 8, and 7
  • Zero-latency sidetone (click for more)
  • Detects four PTTs (two in front and two in back)
  • Two 1/4″ TRS female connectors for PTT input
  • Designed for industrial use
  • Two volume control knobs
  • Two analog line level audio output 3.5 mm TRS female connectors
  • Two microphone audio input 3.5 mm TRS female connectors
  • Two PTT LEDs
  • Controllable audio routing with volume levels for intercom
  • One line-out 1/8″ TRS connector
  • One USB standard-B output female connector
  • Two DB9 female connectors with audio and PTT
  • Grounding connector for increased ESD protection
  • Mounting brackets allows for under desk attachment
  • Shock resistant
  • Metal casing
  • Physical dimensions: 6″ X 5.75″ X 1.5″
  • Includes rubber feet for use on a table top
  • Maintains six (6) audio output and two (2) audio input channels
  • Supports two individual users at the same time, ideal for student/instructor or operator/supervisor teams
  • Independent sidetone control for each user
  • Includes a 6-foot USB cable
  • PTT to keyboard “hotkey” mapping software
  • Demo application, an example SW application for testing and integration.
  • Includes user manual