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Mark II CMU
Communications Management Unit

Key Features

  • Most widely used datalink unit in the industry with over 75 airline customers and growing.
  • 4 MCU unit conforming to ARINC standards
  • PN 965-0758-001 Mark II CMU compatible with ARINC 724B
  • PN 965-0758-002 Mark II CMU compatible with ARINC 758
  • Unique hardware design by which common internal electronics used between -001 and -002 systems (systems easily modifiable between 724B and 758)
  • Fully Software loadable System (Core Software, AOC software and AOC database)
  • Separate AOC software partition provides highest degree of embedded AOC capability. AOC software also used for Airbus's ATSU providing commonality between Airbus and non-Airbus aircraft.
  • AOC Database partition defining Airlines specific AOC functions.
  • Significant airline reconfiguration capability through ground based ACARS Reconfiguration Tool (ART). Provides Airlines ability to maintain and configure Airlines specific database.
  • World Map within database provides automatic frequency management capability
  • Supported by Honeywell PC-based Datalink System Simulation Tool (Airsim)
  • Special hardware and software to support unique Avro / Bae aircraft interface
  • Optional VDL Mode 2 Software
  • Designed to support CNS/ATM upgrades
  • Compatible with HF, SATCOM and VHF communications.
  • 48 ARINC 429 Receivers, 14 Transmitters
  • 32 discrete inputs, 16 discrete outputs
  • APM Interface (APM required for ARINC 758)
  • PCMCIA Interface + ADL/PDL
  • 115 Vac or 28 Vds
  • Mark II CMU In operation on many aircraft types (including B717, B737s, B747c and -400, B757, B767, MD-80, MD-90, MD-11, A300/310, A319/320/321, A330/340, Avro RJ, Bombardier CRJ).

Mark II CMU Ancillary Equipment and tools

  • Loading software and/or database into the Mark II CMU with a portable dataloader requires a PDL to CMU adapter cable (PN 704-2619-002)
  • Loading software and/or database into the Mark II CMU using PCMCIA media requires a front connector plug (PN 704-2659-001)
  • Installation of the Mark II CMU for ARINC 758 wiring requires an Aircraft Personality Module (APM) (PN 964-0465-001)
  • To modify the airline customizable AOC database, the ACARS Reconfiguration Tool (ART) is required. Airlines may also request modifications be performed by Honeywell (see Ground Based tools for specific part number)
  • To emulate on a PC the operation of the CMU as well as other components of the aircraft and air/ground ACARS system, the Airsim tool is required (see Ground Based tools for specific part number)




Other Related Information

Mark II CMU Software Part Numbers
White Papers
Technical Documents
Mark II CMU Brochure