Envoy Data Link

Everything You Need

for Data Link Communications…
In a Single Unit!

Envoy Data Link is a modern, light-weight, high-speed digital data link communications product that includes three integrated avionics modules (CMU, VDR, and MCDU) and the software applications for all your data link needs.

Envoy is a single, standalone avionics unit that brings enhancements to safety and efficiency found in the modern Communications, Navigation, and Surveillance (CNS) Air Traffic Management (ATM) environment. Envoy also contains True Dual Stack functionality that allows a flight crew to change between FANS CPDLC and ATN B1 CPDLC based on airspace requirements.

What’s Inside Envoy

Software Applications
Certified to RTCA DO-178C Level B

envoy_green_bullet_18px FANS 1/A+ (CPDLC and ADS-C)
envoy_green_bullet_18px ATN B1 CPDLC
envoy_green_bullet_18px AOC ACARS
envoy_green_bullet_18px Global Flight Tracking (GADSS)
envoy_green_bullet_18px Secure Wireless Broadcast

Included Hardware
Environmental: RTCA DO-160G

envoy_green_bullet_18px CMU: ARINC 724B and 758
envoy_green_bullet_18px VDR: VDL Mode 0/A and VDL Mode 2, ARINC 750 and TSO-C160
envoy_green_bullet_18px MCDU: ARINC 739 and TSO-C113

Primary Functions

FANS 1/A+ (CPDLC and ADS-C): Worldwide Operations
Certified for FANS 1/A+, VHF Mode A/2 and SATCOM
Envoy Data Link delivers FANS 1/A+ to operators requiring certified compliance with mandates across the North Atlantic Track System, European Tango routes, and other FANS routes throughout world. Envoy contains all the hardware and software required for FANS 1/A+ CPDLC and ADS-C.

envoy_green_bullet_18px NATS Mandate, Phase 2B, (FL350 – FL390), DEC 2017
envoy_green_bullet_18px NATS Mandate, Phase 2C, (FL290+), JAN 2020
envoy_green_bullet_18px FAA NextGEN, NAS Tower and En Route Domains

ATN B1 CPDLC: European Operations
Fully certified for ATN B1 CPDLC, VHF Mode 2
Envoy Data Link delivers ATN B1 CPDLC to operators requiring certified compliance with the European mandate. Beginning February 2020, the ATN B1 CPDLC mandate, requires ALL non-exempt aircraft operating above FL285 to have ATN B1 CPDLC equipment in designated airspace.

envoy_green_bullet_18px EU Mandate: DLS-IR (EC) 29/2009 and 2015/310

True Dual Stack CPDLC: Worldwide Operations
FANS 1/A+ CPDLC and ATN B1 CPDLC … in a single unit
Operating within the NATS, Tango routes, and throughout European airspace represents a unique challenge to some operators who require compliance with two different mandates. Envoy Data Link has True Dual Stack software applications that allow a flight crew to change between FANS CPDLC and ATN B1 CPDLC based on individual airspace requirements.

Other CMUs in combination with expensive FMS changes only allow for FANS CPDLC or ATN CPDLC, not both … penalizing the operator for flight segments that are not in compliance.

With Envoy, you maintain compliance with all ATC mandates …
no matter where you fly.


FAA NextGEN Services: United States Operations
Tower and En Route Services (DCL and CPDLC)
Envoy supports the benefits and enhancements enabled by the FAA NextGEN program and infrastructure.

Operators with routes throughout the U.S. National Airspace System can take advantage of these services to reduce delays and obtain more efficient routes, improve safety, and reduce congestion or adverse weather delays.

CPDLC Departure Clearance (DCL) Services
DCL is currently operational at 55 U.S. airports with more coming on-line. Controllers send text-based clearance instructions to flight crews instead of speaking over the radio. Air carrier dispatchers simultaneously receive the same information, giving all decision makers a shared awareness for faster reactions to changes. Flight crews review the instructions and signal acceptance by pushing a button, and the instructions are then loaded into the aircraft’s flight management system.

En route CPDLC Services
With FANS 1/A+ built into Envoy, operators are prepared for future FAA NextGEN services for En route CPDLC … today. En route services begin in 2019 with planned availability at all 20 En route centers by 2021.

AOC ACARS: Worldwide Operations
Full featured and customizable AOC ACARS unit
Envoy Data Link is a full featured AOC ACARS unit capable of standard ACARS messaging such as OOOI, Weather, Position, and Engine reporting. Envoy comes standard with Built-in messaging per ARINC 618, 620, 622, and 623.

envoy_green_bullet_18px Customizable menu layout, appearance, and color scheme can be tailored to fit individual operator requirements.
envoy_green_bullet_18px Customizable automation via events and triggers
envoy_green_bullet_18px Field loadable databases that do not affect certification

Air Traffic Services (ATS) Messaging
ATS messaging includes pre-departure, pushback, taxi, and oceanic clearances as well as D-ATIS and TWIP services.

Global Flight Tracking: Worldwide Operations
Position Reports per ICAO 15-minute recommendation
Envoy enables Global Flight Tracking by sending specialized position reports over the ACARS network, either terrestrial VHF or by SATCOM.

Envoy Features Condition-based Reporting
By monitoring the condition of configured events and triggers, the timing of automated position reporting can change in frequency depending on the severity of monitored parameters.


Physical Form Factors

Form Factors for Ease of Installation, Display and Control
Considerable Flexibility for Retrofit Aircraft
Envoy Data Link is available in two physical form factors that provide considerable flexibility for retrofit aircraft installations. In addition to flexibility for equipment mounting, Envoy’s two form factors provide operational flexibility for display and control of Envoy’s functions giving an integrated, standalone solution across mixed fleets.

Whether you select the Envoy All-In-One or the Envoy Remote CMU + VDR, All Envoy data link software applications including True Dual Stack CPDLC, FANS 1/A+ (CPDLC and ADS-C), ATN B1 CPDLC, AOC ACARS, and Global Flight Tracking (GADSS) can be configured for use.

Envoy All-In-One
The Envoy All-In-One unit is a pedestal mounted LRU that includes the hardware of three individual avionics units (CMU + VDR + CDU). With the All-In-One form factor, Envoy’s functions can be displayed and controlled from the Envoy CDU or from an external MCDU with the built in A739 interface. For enablement of the Secure Wireless Broadcast, the Envoy All-In-One or Envoy Standalone CDU form factors are required.

Envoy Remote CMU + VDR
The Remote CMU + VDR form factor is a 2MCU LRU intended for rack mounting within the electronics bay. Similar to the All-In-One unit, the Remote CMU + VDR includes the hardware of two avionics units (CMU + VDR) and can mounted remotely. With the Remote CMU + VDR form factor, all Envoy’s functions can be displayed and controlled from an external MCDU with the built in A739 interface.


Additional Capabilities

Secure Wireless Broadcast
Wireless Transmission of Aircraft Data and Messages
Envoy allows secure wireless broadcast of stored aircraft system data and messages. Messages are transmitted at specific intervals and received by an application running on a mobile device such as a tablet or smart phone.

envoy_green_bullet_18px Non-real time ACARS via secure wireless broadcast
envoy_green_bullet_18px Rapid deployment of low cost mobile devices & Apps
envoy_green_bullet_18px App-based data processing of ACARS data

ARINC 619 Interface (ACMS, MOQA and FOQA)
Allows Sending DFDAU and CFDIU Reports
Envoy can be configured to work with an assortment of on aircraft and end system devices in order to provide data link capability for messages to or from existing avionics systems.

Devices include Flight Management Computers for requests such as Winds Aloft or Flight Plan updates. These requests are transparently sent through the unit to the ground when initiated from the FMC. The accompanying response message from the ground is then routed by the unit back to the FMC where the uplinked message and data is available.

ARINC 739 Interface (MCDU Control)
Envoy can display/control other avionics functions
Envoy includes an integrated MCDU that is capable of hosting other ARINC 739 compatible avionics to display and control those device functions from the Envoy front panel.

Envoy functions can be displayed/controlled by other avionics
Envoy can also be hosted from other ARINC 739 MCDUs such as those associated with an FMC. This allows existing MCDUs on the aircraft to display and control Envoy functions from the All-In-One unit or from the Envoy Remote CMU + VDR form factor.

ARINC 741 Interface (SATCOM)
Iridium or Inmarsat for AOC ACARS and FANS 1/A+
From the Envoy unit, connections are made to a 741 protocol compliant SDU data channel to support both FANS 1/A+ (CPDLC and ADS-C) messages and AOC ACARS message exchanges.

ARINC 615A (Data Loader)
Updates via existing data loader or maintenance port
Envoy supports ARINC 615A Ethernet data loaders for software updates and uploading of customizable user databases in the field without the need to remove equipment from the aircraft. This can be performed with an aircraft data loader or from the Envoy maintenance port via laptop application.

System Interfaces & I/O

System Interfaces
Interface with aircraft, operations, and network systems

envoy_green_bullet_18px ARINC 429 Interfaces to aircraft systems
envoy_green_bullet_18px ARINC 619 interface (CVR, ACMS, FOQA)
envoy_green_bullet_18px ARINC 739 (MCDU)
envoy_green_bullet_18px ARINC 740 and 744 (Printer)
envoy_green_bullet_18px ARINC 741 (SATCOM: Iridium, Inmarsat)
envoy_green_bullet_18px ARINC 615 (Data loader)
envoy_green_bullet_18px Network: ARINC and SITA

System I/O
Flexibility for current needs and future growth

envoy_green_bullet_18px ARINC 429: 18-inputs / 8-outputs
envoy_green_bullet_18px Discrete: 16-inputs / 8-outputs
envoy_green_bullet_18px Full Duplex RS-485: 2
envoy_green_bullet_18px CANbus: 1
envoy_green_bullet_18px 100BaseTx Ethernet Port (maintenance): 1
envoy_green_bullet_18px Secure Wireless Broadcast: 1

Envoy Interface Diagram

Envoy Interface Diagram

System Specifications

General Specifications
Applicable to all Envoy form factors

envoy_green_bullet_18px Environmental Categories: RTCA DO-160G
envoy_green_bullet_18px Software Certification: RTCA DO-178C Level B
envoy_green_bullet_18px TSO-C113a Airborne Multipurpose Electronic Displays
envoy_green_bullet_18px TSO-C160a VDL Mode 2 Communications Equipment

Specifications: Envoy All-In-One
Fully Contained Pedistal mounted LRU

envoy_green_bullet_18px Dimensions: 5.75” wide x 4.5” high x 8.5” deep
envoy_green_bullet_18px Mounting: DZUS Rail
envoy_green_bullet_18px Weight: 6.0 lbs. (2.7 kg)
envoy_green_bullet_18px Power: 28 VDC, 25 Watts Typical
envoy_green_bullet_18px Operating Temperature -40 to +55C

Specifications: Envoy Remote CMU + VDR
Electronics Bay Mounted 2MCU LRU

envoy_green_bullet_18px Dimensions: 2MCU
envoy_green_bullet_18px Operating Temperature: -55 to +70C
envoy_green_bullet_18px Power: 28 VDC, 25 Watts Typical


Contact the Spectralux Data Link Team
Americas, Asia, and Oceania
Bryan Sammons
Phone: 425 285 3015
Email: bryans@spectralux.com

Europe, Middle East, and Africa
Ian Gilbert
Phone: +44 (0) 7515 026970
Email: ian.gilbert@igavionics.com